Chicago Storm Posted June 30, 2012 Share Posted June 30, 2012 Technically, today's storms robbed Chicago of an official heatwave, with only 2 consecutive days of 90*F+ temps and a late day high of only 88*F today. Tomorrow-next Saturday all have a chance at 90+...If the ECMWF ends up being correct. Link to comment Share on other sites More sharing options...
michsnowfreak Posted June 30, 2012 Share Posted June 30, 2012 I will post this in my Detroit thread too, though since the questions were asked in this thread.... Thanks to an article Deedler wrote several years ago on heatwaves, it was actually quite easy to find out what the top 2 longest heatwaves were. Ironically the #1 in terms of length certainly wasnt the most unbearable on any given day compared to so many "shorter" heatwaves, but persistence was the word. #1: 12 days…July 17-28, 1964 7-17-64: 90/64 7-18-64: 90/68 7-19-64: 91/64 7-20-64: 94/68 7-21-64: 92/65 7-22-64: 93/68 7-23-64: 91/62 7-24-64: 91/62 7-25-64: 93/65 7-26-64: 90/68 7-27-64: 95/62 7-28-64: 92/69 The 2nd longest, from the late summer of 1953, was brutal. I have some newspaper clippings on this heatwave. Temperatures inside the local jail up to 110F, reports of fish fried in water on lakes that registered water temps over 90F. Note that the the middle 9 days of this heatwave (all but the first and last day) had highs over 95F+ each day! #2: 11 days….Aug 25-Sept 4, 1953 8-25-53: 92/64 8-26-53: 96/71 8-27-53: 95/69 8-28-53: 96/67 8-29-53: 96/71 8-30-53: 97/71 8-31-53: 97/71 9-01-53: 98/70 9-02-53: 100/76 9-03-53: 100/71 9-04-53: 91/61 The 1936 heatwave is considered the “granddaddy” of SE MI heatwaves, even though its rank for consecutive 90F+ days (7) is not near the top, it ranks as one the deadliest heatwave on record for the region, as all 7 days eclipsed 100F. 7-08-36: 104/72 7-09-36: 102/75 7-10-36: 102/77 7-11-36: 101/77 7-12-36: 100/76 7-13-36: 102/73 7-14-36: 104/69 Also here are the top 20 years with most 90F+ days at Detroit 01.) 1988 – 39 days 02.) 1934 – 36 days 03.) 1952 – 33 days 04.) 1955 – 31 days 05.) 1944 – 30 days 06.) 1931 – 27 days 07.) 1941 – 26 days 08.) 1964 – 25 days 09.) 1977 – 25 days 10.) 1991 – 24 days 11.) 2002 – 24 days 12.) 1933 – 23 days 13.) 2011 – 23 days 14.) 1936 – 22 days 15.) 1963 – 22 days 16.) 1987 – 22 days 17.) 1916 – 21 days 18.) 1949 – 21 days 19.) 1976 – 21 days 20.) 1983 – 21 days Link to comment Share on other sites More sharing options...
Powerball Posted June 30, 2012 Share Posted June 30, 2012 I will post this in my Detroit thread too, though since the questions were asked in this thread.... Thanks to an article Deedler wrote several years ago on heatwaves, it was actually quite easy to find out what the top 2 longest heatwaves were. Ironically the #1 in terms of length certainly wasnt the most unbearable on any given day compared to so many "shorter" heatwaves, but persistence was the word. #1: 12 days…July 17-28, 1964 7-17-64: 90/64 7-18-64: 90/68 7-19-64: 91/64 7-20-64: 94/68 7-21-64: 92/65 7-22-64: 93/68 7-23-64: 91/62 7-24-64: 91/62 7-25-64: 93/65 7-26-64: 90/68 7-27-64: 95/62 7-28-64: 92/69 The 2nd longest, from the late summer of 1953, was brutal. I have some newspaper clippings on this heatwave. Temperatures inside the local jail up to 110F, reports of fish fried in water on lakes that registered water temps over 90F. Note that the the middle 9 days of this heatwave (all but the first and last day) had highs over 95F+ each day! #2: 11 days….Aug 25-Sept 4, 1953 8-25-53: 92/64 8-26-53: 96/71 8-27-53: 95/69 8-28-53: 96/67 8-29-53: 96/71 8-30-53: 97/71 8-31-53: 97/71 9-01-53: 98/70 9-02-53: 100/76 9-03-53: 100/71 9-04-53: 91/61 The 1936 heatwave is considered the “granddaddy” of SE MI heatwaves, even though its rank for consecutive 90F+ days (7) is not near the top, it ranks as one the deadliest heatwave on record for the region, as all 7 days eclipsed 100F. 7-08-36: 104/72 7-09-36: 102/75 7-10-36: 102/77 7-11-36: 101/77 7-12-36: 100/76 7-13-36: 102/73 7-14-36: 104/69 Also here are the top 20 years with most 90F+ days at Detroit 01.) 1988 – 39 days 02.) 1934 – 36 days 03.) 1952 – 33 days 04.) 1955 – 31 days 05.) 1944 – 30 days 06.) 1931 – 27 days 07.) 1941 – 26 days 08.) 1964 – 25 days 09.) 1977 – 25 days 10.) 1991 – 24 days 11.) 2002 – 24 days 12.) 1933 – 23 days 13.) 2011 – 23 days 14.) 1936 – 22 days 15.) 1963 – 22 days 16.) 1987 – 22 days 17.) 1916 – 21 days 18.) 1949 – 21 days 19.) 1976 – 21 days 20.) 1983 – 21 days It would be nice if Mr. Deedler had provided citations for his data. The reason I say that is because it's different from the information posted in an old top news headline for DTX. According to them, 1953 had the longest consecutive 90*F+ streak with only 9 days (I assume the 100*F readings were left out). As far as 1964 is concerned, given the several 90*F readings in his data, it could simply be a conflict of what site the temps were recorded at (one site could have had 89*F and the other could have had 90*F), or either him or DTX are wrong. http://www.crh.noaa....=70962&source=2 Link to comment Share on other sites More sharing options...
Stebo Posted June 30, 2012 Share Posted June 30, 2012 It would be nice if Mr. Deedler had provided citations for his data. The reason I say that is because it's different from the information posted in an old top news headline for DTX. According to them, 1953 had the longest consecutive 90*F+ streak with only 9 days (I assume the 100*F readings were left out). As far as 1964 is concerned, given the several 90*F readings in his data, it could simply be a conflict of what site the temps were recorded at (one site could have had 89*F and the other could have had 90*F), or either him or DTX are wrong. http://www.crh.noaa....=70962&source=2 That link has this at the end of it however. The maximums for each site are as follows: Detroit 11 days ending 9/4/1953...Flint 13 days ending 7/18/1936...Tri Cities 10 days ending 9/3/1953 I think this is referring to the number of 90 degree days in a row. Link to comment Share on other sites More sharing options...
cyclone77 Posted June 30, 2012 Share Posted June 30, 2012 Couldn't get a good look at the Euro since the wunder model page isn't working, but based on the free data on other sites it looks like at least another 8 days of heat on the way. Link to comment Share on other sites More sharing options...
cyclone77 Posted June 30, 2012 Share Posted June 30, 2012 Already 100 degrees in Cairo IL. May have a shot at 110 there. Link to comment Share on other sites More sharing options...
AppsRunner Posted June 30, 2012 Share Posted June 30, 2012 Only 81 here in NWOH, which isn't great but makes it more bearable for people cleaning up after yesterday's derecho. Just a mess out there over by Defiance and Findlay. Link to comment Share on other sites More sharing options...
Chicago Storm Posted June 30, 2012 Share Posted June 30, 2012 Izzi talking up the heat potential for Sunday and beyond... ASSUMING CONVECTION DOESN'T MUCK THINGS UP TOO MUCH...CORE OF THE HEAT LOOKS TO BUILD NORTH ACROSS THE AREA SUNDAY AND ESPECIALLY MONDAY INTO TUESDAY WHEN HIGHS SHOULD CLIMB WELL INTO THE 90S AND HEAT INDICES OVER 100F. ECMWF AND GFS BOTH BUILD THE HEART OF THE UPPER RIDGE EAST INTO THE MIDWEST BY LATE IN THE WEEK WHICH COULD SEND TEMPS WARMING A BIT MORE WITH UPPER 90S AND EVEN TRIPLE DIGITS NOT OUT OF THE QUESTION BY THURSDAY AND FRIDAY. THE PERSISTENCE OF THE HEAT THUS FAR THE SUMMER OF 2012...WHILE NOT QUITE AS EXTREME AS THE SUMMER OF 1988...SURE SEEMS INTENT OF GIVING '88 A BIT OF A RUN FOR ITS MONEY. Link to comment Share on other sites More sharing options...
Hoar_Frost Posted June 30, 2012 Share Posted June 30, 2012 Izzi talking up the heat potential for Sunday and beyond... ASSUMING CONVECTION DOESN'T MUCK THINGS UP TOO MUCH...CORE OF THE HEAT LOOKS TO BUILD NORTH ACROSS THE AREA SUNDAY AND ESPECIALLY MONDAY INTO TUESDAY WHEN HIGHS SHOULD CLIMB WELL INTO THE 90S AND HEAT INDICES OVER 100F. ECMWF AND GFS BOTH BUILD THE HEART OF THE UPPER RIDGE EAST INTO THE MIDWEST BY LATE IN THE WEEK WHICH COULD SEND TEMPS WARMING A BIT MORE WITH UPPER 90S AND EVEN TRIPLE DIGITS NOT OUT OF THE QUESTION BY THURSDAY AND FRIDAY. THE PERSISTENCE OF THE HEAT THUS FAR THE SUMMER OF 2012...WHILE NOT QUITE AS EXTREME AS THE SUMMER OF 1988...SURE SEEMS INTENT OF GIVING '88 A BIT OF A RUN FOR ITS MONEY. I believe that's the first 1988 mention I've seen in an AFD from LOT. Link to comment Share on other sites More sharing options...
BeauDodson Posted June 30, 2012 Share Posted June 30, 2012 Izzi talking up the heat potential for Sunday and beyond... ASSUMING CONVECTION DOESN'T MUCK THINGS UP TOO MUCH...CORE OF THE HEAT LOOKS TO BUILD NORTH ACROSS THE AREA SUNDAY AND ESPECIALLY MONDAY INTO TUESDAY WHEN HIGHS SHOULD CLIMB WELL INTO THE 90S AND HEAT INDICES OVER 100F. ECMWF AND GFS BOTH BUILD THE HEART OF THE UPPER RIDGE EAST INTO THE MIDWEST BY LATE IN THE WEEK WHICH COULD SEND TEMPS WARMING A BIT MORE WITH UPPER 90S AND EVEN TRIPLE DIGITS NOT OUT OF THE QUESTION BY THURSDAY AND FRIDAY. THE PERSISTENCE OF THE HEAT THUS FAR THE SUMMER OF 2012...WHILE NOT QUITE AS EXTREME AS THE SUMMER OF 1988...SURE SEEMS INTENT OF GIVING '88 A BIT OF A RUN FOR ITS MONEY. I am glad to see the 1988 reference - this is not the 1930s. Yes - perhaps some all time records have been broken - but the duration of some of the heat in the 1930s was amazing - it wasn't just 100-105 there were a lot of 105-115 days - long duration drought - multiple years of heat/drought. I think 2008 is a decent fit - although this region is actually drier than 1988 (quite a bit drier actually). If this continues into July and August then we are looking at a very expensive disaster here - hydrological and agriculture (it is already a big disaster for many farmers). For this region the 1910-1920, 1930s, and 1950s were extreme decades. This past decade has been extreme. Link to comment Share on other sites More sharing options...
hm8 Posted June 30, 2012 Share Posted June 30, 2012 Another 90 degree day here... 91 now, but that feels relatively mild at this point Link to comment Share on other sites More sharing options...
BeauDodson Posted June 30, 2012 Share Posted June 30, 2012 Link to comment Share on other sites More sharing options...
Chicago Storm Posted June 30, 2012 Share Posted June 30, 2012 ORD up to 90 as of 3PM...17th 90+ day of the year. Link to comment Share on other sites More sharing options...
cyclone77 Posted June 30, 2012 Share Posted June 30, 2012 12z Euro shows the heat really ramping up Wednesday through Saturday. At least mid to upper 90s for northern IL those days. Link to comment Share on other sites More sharing options...
BeauDodson Posted June 30, 2012 Share Posted June 30, 2012 Some new crunched numbers - to show you how common or uncommon a heat wave like this would be in our region - these are unofficial numbers - I went back into the 1800s for the Paducah and Paducah area. This is what I found. The criteria I used would be a temperature of 102 degrees or above for four days in a row (or more). The years that this happened would be 1896, 1901, 1918, 1925, 1930, 1931, 1934, 1936, 1941, 1947, 1952, 1988. In 1918, 1936, and 1952 it happened twice - the only years I could find where it happened twice. The highest number of consecutive days that I could find was in 1901 8 days in July. This type of event is most common in July and August. I could only find 2 years where it happened in June - that was 1931 and 1952. Both of which brought 4 consecutive days of 102 or above in the City of Paducah or Paducah area. Obviously the 1930s were extreme years. You also had the great floods of the 1930s on top of the great droughts of the 1930s. See a common theme? Cycles come and cycles go. Paducah currently is at 3 days of 102 or above. That does include today. Link to comment Share on other sites More sharing options...
kab2791 Posted June 30, 2012 Share Posted June 30, 2012 According to DTX: FOR THE 4TH CONSECUTIVE DAY...TEMPERATURES HAVE EQUALED OR EXCEEDED THE 90 DEGREE MARK...RAISING THE DETROIT TOTAL TO 11 DAYS THUS FAR. DTW should be able to squeak out a 90 tomorrow like it did Wednesday, and the only wild card fro 90+ heat early next week is potential convective debris or MCS activity. Link to comment Share on other sites More sharing options...
Powerball Posted June 30, 2012 Share Posted June 30, 2012 The high for Detroit today was 95*F. If we can eek out a 90*F tomorrow and Monday, we would make a run for the all-time consecutive days of 90*F+ highs record. Link to comment Share on other sites More sharing options...
michsnowfreak Posted June 30, 2012 Share Posted June 30, 2012 It would be nice if Mr. Deedler had provided citations for his data. The reason I say that is because it's different from the information posted in an old top news headline for DTX. According to them, 1953 had the longest consecutive 90*F+ streak with only 9 days (I assume the 100*F readings were left out). As far as 1964 is concerned, given the several 90*F readings in his data, it could simply be a conflict of what site the temps were recorded at (one site could have had 89*F and the other could have had 90*F), or either him or DTX are wrong. http://www.crh.noaa....=70962&source=2 Mr. Deedler didnt post the daily data, I looked it up myself. This was Bills article he just named the longest heatwaves (the article was mainly about the 1936 heatwave). http://www.crh.noaa.gov/dtx/heatwave.php You can look up any official data you want to 1887 for Detroit, in whatever the "f-6" form of the time is. http://www7.ncdc.noaa.gov/IPS/lcd/lcd.html And I also realized something....the 1964 heatwave referenced was at DTW where there were 12 consecutive 90F+ days, the official Detroit numbers were at DET through 1965, and in the 13-day stretch in July 1964 (see below) DET only hit the upper 80s on 2 days. So OFFICIALLY the longest heatwave is the 1953 heatwave at 11 days. That chart you linked means how many times Detroit has gone 9 or more days of 90F+. Officially at DET from July 16-28, 1964: In this 13 day stretch, 2 days stayed in the upper 80s 7-16-64: 90/66 7-17-64: 93/72 7-18-64: 94/74 7-19-64: 94/71 7-20-64: 96/70 7-21-64: 92/69 7-22-64: 91/72 7-23-64: 89/67* 7-24-64: 92/70 7-25-64: 94/71 7-26-64: 87/70* 7-27-64: 95/71 7-28-64: 94/75 So again, the following is Detroits longest official heatwave on record 11 days….Aug 25-Sept 4, 1953 8-25-53: 92/64 8-26-53: 96/71 8-27-53: 95/69 8-28-53: 96/67 8-29-53: 96/71 8-30-53: 97/71 8-31-53: 97/71 9-01-53: 98/70 9-02-53: 100/76 9-03-53: 100/71 9-04-53: 91/61 Link to comment Share on other sites More sharing options...
Chicago Storm Posted June 30, 2012 Share Posted June 30, 2012 Topped out at 92 at ORD and 90 here today. Link to comment Share on other sites More sharing options...
Powerball Posted June 30, 2012 Share Posted June 30, 2012 Mr. Deedler didnt post the daily data, I looked it up myself. This was Bills article he just named the longest heatwaves (the article was mainly about the 1936 heatwave). http://www.crh.noaa....tx/heatwave.php You can look up any official data you want to 1887 for Detroit, in whatever the "f-6" form of the time is. http://www7.ncdc.noa...PS/lcd/lcd.html And I also realized something....the 1964 heatwave referenced was at DTW where there were 12 consecutive 90F+ days, the official Detroit numbers were at DET through 1965, and in the 13-day stretch in July 1964 (see below) DET only hit the upper 80s on 2 days. So OFFICIALLY the longest heatwave is the 1953 heatwave at 11 days. That chart you linked means how many times Detroit has gone 9 or more days of 90F+. Officially at DET from July 16-28, 1964: In this 13 day stretch, 2 days stayed in the upper 80s 7-16-64: 90/66 7-17-64: 93/72 7-18-64: 94/74 7-19-64: 94/71 7-20-64: 96/70 7-21-64: 92/69 7-22-64: 91/72 7-23-64: 89/67* 7-24-64: 92/70 7-25-64: 94/71 7-26-64: 87/70* 7-27-64: 95/71 7-28-64: 94/75 So again, the following is Detroits longest official heatwave on record 11 days….Aug 25-Sept 4, 1953 8-25-53: 92/64 8-26-53: 96/71 8-27-53: 95/69 8-28-53: 96/67 8-29-53: 96/71 8-30-53: 97/71 8-31-53: 97/71 9-01-53: 98/70 9-02-53: 100/76 9-03-53: 100/71 9-04-53: 91/61 Yeah, the bolded was really my concern. I wasn't saying anyone was right or wrong, but that the data was conflicting (I'm sure the data itself wasn't wrong). So it was simply a matter of difference in observation sites, and officially only the 1953 record stands. As far as that chart, it simply compared the longest streak of 90*F+ days to the heatwave we had in 2011, as there was a possibility that if the 2011 had 9 days of 90*F+ weather, it would have at last tied with 1953 until day 11. As I think more about it, maybe 1953 was only listed up to 9 day because it's been the only stretch of 90*F+ days in official recording history to have 9+ days of consecutive 90*F+ weather. But what that also shows is that even when Detroit had factories/traffic/commerce up to gazoo and was far more urbanized with upwards of 2 million people (thus more of an UHI effect), while the area around Metro Airport was still farmland (thus less of a UHI effect), City Airport was still under the marine influence of Lake St. Clair and Metro Airport would still out-torch it. So again, blame the slight lag in temps so often at City Airport on the water. Link to comment Share on other sites More sharing options...
Hoosier Posted July 1, 2012 Author Share Posted July 1, 2012 EVV made it to 106. What a nasty run they are on. Link to comment Share on other sites More sharing options...
BeauDodson Posted July 1, 2012 Share Posted July 1, 2012 If we can make it one more day then we will join some decent "ranks" in the numbers for 102 and above. Hopefully we do reach that - we made it this far - I like to see these things make it into the books. Link to comment Share on other sites More sharing options...
KeenerWx Posted July 1, 2012 Share Posted July 1, 2012 Via LOT..Assuming Chicago goes AOA 90 for the next 7 days, they will only need 9 more days throughout the summer to make it in the top 10. PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 415 AM CDT SUN JUL 1 2012 /515 AM EDT SUN JUL 1 2012/ ...UNUSUALLY LARGE NUMBER OF 90 DEGREE DAYS SO FAR THIS SUMMER... THROUGH JUNE 30TH...THERE HAS NEVER BEEN A YEAR IN CHICAGO THAT HAS SEEN MORE 90 DEGREE DAYS TO DATE THAN THIS SUMMER. SO FAR THIS YEAR CHICAGO HAS OFFICIALLY HAD 17 DAYS WITH HIGH TEMPERATURES AT OR ABOVE 90 DEGREES. THIS TIES 1954 AND 1977 WITH THE GREATEST NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH. IN ROCKFORD THERE HAVE BEEN 15 DAYS AT OR ABOVE 90 DEGREES SO FAR THIS YEAR...WHICH PUTS 2012 IN 4TH PLACE FOR MOST NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH. THE MOST NUMBER OF 90 DEGREES DAYS THROUGH JUNE 30TH IN ROCKFORD IS 27 BACK IN 1934...WITH THE SECOND MOST BEING 24 IN 1921...AND 3RD MOST IS 20 IN 1933. DURING EACH OF THOSE YEARS CHICAGO`S OFFICIAL TEMPERATURES WERE RECORDED MUCH CLOSER TO LAKE MICHIGAN WHICH IS THE REASON FOR THE LARGE DISPARITY BETWEEN ROCKFORD AND CHICAGO FOR NUMBER OF 90 DEGREE DAYS THOSE YEARS. ON AVERAGE...THROUGH JUNE 30TH CHICAGO WILL HAVE SEEN ABOUT 4 DAYS WITH HIGHS IN THE 90S AND ROCKFORD 5 DAYS. THE AVERAGE NUMBER OF 90 DEGREE DAYS IN A YEAR FOR CHICAGO IS ABOUT 16 WHILE ROCKFORD AVERAGES NEARLY 20 DAYS. HISTORICALLY SPEAKING...ROCKFORD HAS ALREADY SEEN MORE 90 DEGREE DAYS THROUGH JUNE 30 THAN THEY ENDED UP HAVING THE ENTIRE YEAR 42% OF PREVIOUS YEARS. IN CHICAGO...THIS YEAR HAS SEEN MORE 90 DEGREE DAYS THROUGH JUNE 30TH THAN 58% OF ENTIRE PREVIOUS YEARS. WHILE WHAT HAS HAPPENED SO FAR THIS WARM SEASON IS NOT NECESSARILY AN ACCURATE PREDICTOR OF WHAT WILL HAPPEN THE REMAINDER OF THE SUMMER. HOWEVER...STATISTICALLY SPEAKING EVERY ONE OF TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH IN CHICAGO WENT ON TO PRODUCE A GREATER THAN AVERAGE NUMBER OF 90 DEGREE DAYS DURING THE REMAINDER OF THE YEAR. THE JULY THROUGH OCTOBER PERIOD IN CHICAGO AVERAGES 11.6 DAYS WITH HIGHS AT OR ABOVE 90...YET DURING THE TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH THE AVERAGE WAS 19.8 DAYS. IN ROCKFORD THE STATISTICS ARE SIMILAR WITH ONLY ONE OF THE TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH NOT GOING ON TO PRODUCE AN ABOVE AVERAGE NUMBER OF 90 DEGREE DAYS FOR THE REMAINDER OF THE YEAR. IN AN AVERAGE YEAR...ROCKFORD SEES AN ADDITIONAL 14.5 DAYS ABOVE 90 DEGREES AFTER JUNE 30TH...WHILE THE AVERAGE FOR THE YEARS WITH THE TOP 10 NUMBER OF 90S THROUGH JUNE 30TH IS 23.4 ADDITIONAL 90 DEGREE DAYS. HERE ARE THE TOP 10 90 DEGREE DAY PRODUCING YEARS IN ROCKFORD: # OF 90S YEAR 1 62 1921 2 52 1934 3 49 1936 4 46 1988 46 1937 6 45 1933 7 44 1931 8 42 1916 9 40 1941 40 1947 HERE ARE THE TOP 10 NUMBER OF 90 DEGREE DAYS IN A YEAR FOR CHICAGO: # OF 90S YEAR 1 47 1988 2 46 1955 3 42 1953 42 1983 5 39 1959 6 38 1952 7 36 1954 8 35 1964 9 34 1944 10 33 1977 33 1987 $$ IZZI Link to comment Share on other sites More sharing options...
michsnowfreak Posted July 1, 2012 Share Posted July 1, 2012 Yeah, the bolded was really my concern. I wasn't saying anyone was right or wrong, but that the data was conflicting (I'm sure the data itself wasn't wrong). So it was simply a matter of difference in observation sites, and officially only the 1953 record stands. As far as that chart, it simply compared the longest streak of 90*F+ days to the heatwave we had in 2011, as there was a possibility that if the 2011 had 9 days of 90*F+ weather, it would have at last tied with 1953 until day 11. As I think more about it, maybe 1953 was only listed up to 9 day because it's been the only stretch of 90*F+ days in official recording history to have 9+ days of consecutive 90*F+ weather. But what that also shows is that even when Detroit had factories/traffic/commerce up to gazoo and was far more urbanized with upwards of 2 million people (thus more of an UHI effect), while the area around Metro Airport was still farmland (thus less of a UHI effect), City Airport was still under the marine influence of Lake St. Clair and Metro Airport would still out-torch it. So again, blame the slight lag in temps so often at City Airport on the water. ...............DET.......DTW 7-17-64: 93/72........90/64 7-18-64: 94/74........90/68 7-19-64: 94/71........91/64 7-20-64: 96/70........94/68 7-21-64: 92/69........92/65 7-22-64: 91/72........93/68 7-23-64: 89/67........91/62 7-24-64: 92/70........91/62 7-25-64: 94/71........93/65 7-26-64: 87/70........90/68 7-27-64: 95/71........95/62 7-28-64: 94/75........92/69 12d avg..93/71........92/65 Obviously on certain days the marine influence would have the upper hand and cause DET to be cooler than DTW, but when you look at the heatwave as a whole, DET still outtorched DTW, and the difference in low temps is amazing. The 1960s officially had no 100F temps, the hottest being 98F on 7-3-66, but much like the aforementioned 1964 heatwave, this was a product of the official site changing from DET to DTW. The high at DET on 7-2-66 was 102F. It seemed that in those days, DET would still outheat DTW on most days (again, outside of those days with a strong marine influence). But low temps, thats a league of its own. The low temps at DTW from the time the official site changed in 1966 and on through the much of the 1980s was a radiating magnet, almost White-Lake-esque at times. When it came to high temps, some days DTW would be warmer, some days DET...but the difference in low temps was ASTRONOMICAL in those days, and it most certainly affected climate numbers in a HUGE way. Using the NCDC yearly clim summaries, I comparied the two sites for a few years picked at random just to show the difference. Unfortunately no DET numbers were published after 1982 on the site to compare the differences now, but just what I see on a daily basis, I would estimate that a full year would see DTW average between 0 and 1F WARMER than DET, not some 4F+ COLDER as it often did in the 1960s. Here is the yearly average high/low at DTW vs DET 1963 DET: 58.4F/40.2F....mean 49.3F 1963 DTW: 57.8F/35.8F....mean 46.8F 1967 DET: 57.0F/41.5F....mean 49.3F 1967 DTW: 57.0F/38.4F....mean 47.7F 1971 DET: 59.0F/42.3F....mean 50.7F 1971 DTW: 59.2F/39.0F....mean 49.1F 1981 DET: 57.5F/42.9F....mean 50.2F 1981 DTW: 57.4F/38.9F....mean 48.2F Link to comment Share on other sites More sharing options...
michsnowfreak Posted July 1, 2012 Share Posted July 1, 2012 Via LOT..Assuming Chicago goes AOA 90 for the next 7 days, they will only need 9 more days throughout the summer to make it in the top 10. PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 415 AM CDT SUN JUL 1 2012 /515 AM EDT SUN JUL 1 2012/ ...UNUSUALLY LARGE NUMBER OF 90 DEGREE DAYS SO FAR THIS SUMMER... THROUGH JUNE 30TH...THERE HAS NEVER BEEN A YEAR IN CHICAGO THAT HAS SEEN MORE 90 DEGREE DAYS TO DATE THAN THIS SUMMER. SO FAR THIS YEAR CHICAGO HAS OFFICIALLY HAD 17 DAYS WITH HIGH TEMPERATURES AT OR ABOVE 90 DEGREES. THIS TIES 1954 AND 1977 WITH THE GREATEST NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH. IN ROCKFORD THERE HAVE BEEN 15 DAYS AT OR ABOVE 90 DEGREES SO FAR THIS YEAR...WHICH PUTS 2012 IN 4TH PLACE FOR MOST NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH. THE MOST NUMBER OF 90 DEGREES DAYS THROUGH JUNE 30TH IN ROCKFORD IS 27 BACK IN 1934...WITH THE SECOND MOST BEING 24 IN 1921...AND 3RD MOST IS 20 IN 1933. DURING EACH OF THOSE YEARS CHICAGO`S OFFICIAL TEMPERATURES WERE RECORDED MUCH CLOSER TO LAKE MICHIGAN WHICH IS THE REASON FOR THE LARGE DISPARITY BETWEEN ROCKFORD AND CHICAGO FOR NUMBER OF 90 DEGREE DAYS THOSE YEARS. ON AVERAGE...THROUGH JUNE 30TH CHICAGO WILL HAVE SEEN ABOUT 4 DAYS WITH HIGHS IN THE 90S AND ROCKFORD 5 DAYS. THE AVERAGE NUMBER OF 90 DEGREE DAYS IN A YEAR FOR CHICAGO IS ABOUT 16 WHILE ROCKFORD AVERAGES NEARLY 20 DAYS. HISTORICALLY SPEAKING...ROCKFORD HAS ALREADY SEEN MORE 90 DEGREE DAYS THROUGH JUNE 30 THAN THEY ENDED UP HAVING THE ENTIRE YEAR 42% OF PREVIOUS YEARS. IN CHICAGO...THIS YEAR HAS SEEN MORE 90 DEGREE DAYS THROUGH JUNE 30TH THAN 58% OF ENTIRE PREVIOUS YEARS. WHILE WHAT HAS HAPPENED SO FAR THIS WARM SEASON IS NOT NECESSARILY AN ACCURATE PREDICTOR OF WHAT WILL HAPPEN THE REMAINDER OF THE SUMMER. HOWEVER...STATISTICALLY SPEAKING EVERY ONE OF TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH IN CHICAGO WENT ON TO PRODUCE A GREATER THAN AVERAGE NUMBER OF 90 DEGREE DAYS DURING THE REMAINDER OF THE YEAR. THE JULY THROUGH OCTOBER PERIOD IN CHICAGO AVERAGES 11.6 DAYS WITH HIGHS AT OR ABOVE 90...YET DURING THE TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH THE AVERAGE WAS 19.8 DAYS. IN ROCKFORD THE STATISTICS ARE SIMILAR WITH ONLY ONE OF THE TOP 10 YEARS FOR NUMBER OF 90 DEGREE DAYS THROUGH JUNE 30TH NOT GOING ON TO PRODUCE AN ABOVE AVERAGE NUMBER OF 90 DEGREE DAYS FOR THE REMAINDER OF THE YEAR. IN AN AVERAGE YEAR...ROCKFORD SEES AN ADDITIONAL 14.5 DAYS ABOVE 90 DEGREES AFTER JUNE 30TH...WHILE THE AVERAGE FOR THE YEARS WITH THE TOP 10 NUMBER OF 90S THROUGH JUNE 30TH IS 23.4 ADDITIONAL 90 DEGREE DAYS. HERE ARE THE TOP 10 90 DEGREE DAY PRODUCING YEARS IN ROCKFORD: # OF 90S YEAR 1 62 1921 2 52 1934 3 49 1936 4 46 1988 46 1937 6 45 1933 7 44 1931 8 42 1916 9 40 1941 40 1947 HERE ARE THE TOP 10 NUMBER OF 90 DEGREE DAYS IN A YEAR FOR CHICAGO: # OF 90S YEAR 1 47 1988 2 46 1955 3 42 1953 42 1983 5 39 1959 6 38 1952 7 36 1954 8 35 1964 9 34 1944 10 33 1977 33 1987 $$ IZZI I always like comparing ORD/DTW, and am kind of surprised how much more impressive Chicagos 90F+ days list is (though they do average 16-17 days per year of 90F+, compared to Detroits 11-12) CHICAGO 47 days - 1988 46 days - 1955 42 days - 1953 42 days - 1983 39 days - 1959 38 days - 1952 36 days - 1954 35 days - 1964 34 days - 1944 DETROIT 39 days - 1988 36 days - 1934 33 days - 1952 31 days - 1955 30 days - 1944 27 days - 1931 26 days - 1941 25 days - 1964 25 days - 1977 24 days - 1991 & 2002 Link to comment Share on other sites More sharing options...
BeauDodson Posted July 1, 2012 Share Posted July 1, 2012 Here are some records broken at PAH: Driest first half of any year. Previous record was 12.35 in 1941. New record is 11.59 inches. Driest April-June period. Previous record was 5.68 in 1988. New record is 1.85 inches. Link to comment Share on other sites More sharing options...
Chicago Storm Posted July 1, 2012 Share Posted July 1, 2012 ORD is up to 91...18th 90+ day of the year. Link to comment Share on other sites More sharing options...
IWXwx Posted July 1, 2012 Share Posted July 1, 2012 Here are some records broken at PAH: Driest first half of any year. Previous record was 12.35 in 1941. New record is 11.59 inches. Driest April-June period. Previous record was 5.68 in 1988. New record is 1.85 inches. Beau, your area has been a hotbed for extreme weather in recent years. You've had way more than your share of severe weather, multiple crippling ice storms, extreme heat, and now exceptional drought conditions. By the way, you had been MIA for awhile. It's good to see you posting again. I did see you posting extensively on NWSchat during the March tornado outbreak. We are in bad shape up here in NE IN, but not nearly as bad as you guys. You've averaging 10 degrees warmer than us for the past several days, which does nothing except exacerbate the problem. Link to comment Share on other sites More sharing options...
BeauDodson Posted July 1, 2012 Share Posted July 1, 2012 Beau, your area has been a hotbed for extreme weather in recent years. You've had way more than your share of severe weather, multiple crippling ice storms, extreme heat, and now exceptional drought conditions. By the way, you had been MIA for awhile. It's good to see you posting again. I did see you posting extensively on NWSchat during the March tornado outbreak. We are in bad shape up here in NE IN, but not nearly as bad as you guys. You've averaging 10 degrees warmer than us for the past several days, which does nothing except exacerbate the problem. It has been a crazzzzzzy ride down here - historic ice storms, historic snow falls, history floods, historic cold and heat - not the historic drought! The tornado outbreaks kept me busy - I was worried the rest of the spring would be wild. It wasn't - very very quiet in this area (after the late February outbreak and then the early March outbreak). Lot of deaths in the KPAH region from tornadoes - a lot of them from the Harrisburg, IL outbreak Link to comment Share on other sites More sharing options...
BeauDodson Posted July 1, 2012 Share Posted July 1, 2012 The monthly maps were updated this morning Link to comment Share on other sites More sharing options...
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