Ian Posted March 1, 2011 Share Posted March 1, 2011 Here's a start on temps... I'll do as much as I can stay interested in. =HIGHS= 1981-2010 AVGS (number of days) <50 = 9.5 (284 in 30 yrs) 70+ = 4.1 (122 in 30 yrs) 80+ = 0.8 (25 in 30 yrs) 32 or below = .3 (10 in 30 yrs) 3 days have been 90+ in MAR at DC -- all in 1907 (22nd, 23rd, 29th) Max Temp of Month 3/23/1907 - 93F Max Temp of recent (#4 overall) 3/12/1990 - 89F Records... <50 = 25 (1960) 70+ = 16 (1945) 80+ = 9 (1945) 32 or below = 7 (1960) =LOWS= 1981-2010 AVGS (number of days) 32 or below = 8 (240 in 30 yrs) Records... 32 or below = 24 (1960) Min Temp of Month 03/04/1873 - 4F Min Temp of recent (#32 overall) 3/3/2009 - 14F Link to comment Share on other sites More sharing options...
Ian Posted March 1, 2011 Author Share Posted March 1, 2011 =LIQUID= Max Daily Rainfall 03/09/1881 - 2.79" Max Daily Rainfall of recent 3/13/1993 - 2.29" =SNOW= 1981-2010 AVGS (number of days) .1"+ = .87 (26 in 30 years) 1"+ = .37 (11 in 30 years) 3"+ = .13 (4 in 30 years) 3"+ in last 30 yrs: 1993, 1996, 1999, 2009 Records... .1"+ = 6 (1906, 1914, 1934, 1958) 1"+ = 5 (1906) 3"+ = 4 (1914) Max Daily Snowfall 3/29/1942 - 11.5" Daily Snowfall above 5" 3/4/1909.....9.8 3/9/1999.....8.4 3/7/1941.....8 3/15/1900.....8 3/3/1960.....7.1 3/13/1993.....6.5 03/11/1888.....6 03/27/1891.....6 03/28/1891.....6 3/8/1911.....5.8 3/11/1914.....5.3 3/21/1924.....5.3 3/10/1907.....5.3 3/6/1923.....5.2 03/16/1892 5.2 3/20/1914.....5.2 Max Snow Depth…. 3/10/1999, 3/4/1960, 3/7/1941, 3/10/1960..... 8" ================== march 1" snow occurrences over history: Link to comment Share on other sites More sharing options...
ORH_wxman Posted March 1, 2011 Share Posted March 1, 2011 Percentage of Marches with measurable snow in DCA? IAD? I've been texting with zwyts tonight. Want to give him some hope of one more (which might be very possible in a brief window when W ridge pokes up...maybe Mar 10-16ish) Link to comment Share on other sites More sharing options...
Ian Posted March 1, 2011 Author Share Posted March 1, 2011 Percentage of Marches with measurable snow in DCA? IAD? I've been texting with zwyts tonight. Want to give him some hope of one more (which might be very possible in a brief window when W ridge pokes up...maybe Mar 10-16ish) 62% at DCA over all history 50% last 30 yrs (27% if 1"+) The odds are definitely higher at IAD and BWI but I'd have to look closer - i do have the 30 yr here i guess http://voices.washin...n_snowfall.html If you live away from National Airport (most people), your odds of getting more snow are even better. A brief comparison to other local NOAA observation locations shows 70 percent of final snowfalls have happened in March or later at Dulles compared to 67 percent at Baltimore. Add in another roughly 10 percent at Dulles and 17 percent at Baltimore for the second half of February. Link to comment Share on other sites More sharing options...
ORH_wxman Posted March 1, 2011 Share Posted March 1, 2011 62% at DCA over all history 50% last 30 yrs (27% if 1"+) The odds are definitely higher at IAD and BWI but I'd have to look closer - i do have the 30 yr here i guess http://voices.washin...n_snowfall.html If you live away from National Airport (most people), your odds of getting more snow are even better. A brief comparison to other local NOAA observation locations shows 70 percent of final snowfalls have happened in March or later at Dulles compared to 67 percent at Baltimore. Add in another roughly 10 percent at Dulles and 17 percent at Baltimore for the second half of February. Thanks Matt was thinking probably one more for the suburbs around Mar 24th...would make sense anyway. Usually the hills arent done yet. Link to comment Share on other sites More sharing options...
Ian Posted March 1, 2011 Author Share Posted March 1, 2011 Thanks Matt was thinking probably one more for the suburbs around Mar 24th...would make sense anyway. Usually the hills arent done yet. That seems awful late but maybe something minor. For the most part the data says late season snow is disappearing down here IMO. Link to comment Share on other sites More sharing options...
ORH_wxman Posted March 1, 2011 Share Posted March 1, 2011 That seems awful late but maybe something minor. For the most part the data says late season snow is disappearing down here IMO. Probably a reason to expect it (even though statistically it doesn't mean anything). You're due for al ate season event...same as we are in New England. Link to comment Share on other sites More sharing options...
Ian Posted March 3, 2011 Author Share Posted March 3, 2011 Added - Days with .1", 1", 3" snow breakdown last 30 yrs and overall records for each Monthly Max/Min temp, rain, snow, snow on ground data Link to comment Share on other sites More sharing options...
Sparky Posted March 3, 2011 Share Posted March 3, 2011 If you live away from National Airport (most people), your odds of getting more snow are even better. So I went through my 17 years of records at Westminster. Average snowfall for that period (93/94 - 09/10) is 4.0 inches in March. Note that this does not include March 93 when I still lived in Baltimore but I know this area got 18+ in the Superstorm. 12 out of 17 March's had measurable snowfall which is 71%. 1999 had the most with 18 inches. Even the crappy El Nino 1998 had 7.8 inches. Longterm March averages out here are closer to 7 inches in March. I looked at April too, average snowfall is 0.3 inches. Years with April snow that was measureable are: 96 - 2" 2000 - 3" 2001 - 0.3" 2003 - 0.5" Link to comment Share on other sites More sharing options...
RodneyS Posted March 3, 2011 Share Posted March 3, 2011 For the most part the data says late season snow is disappearing down here IMO. To buttress this point, if you look at the entire snow history of Washington, DC (back to 1884-85), the median date of the last snow of an inch or more is March 2 and the median date of the last measurable snow (0.1 inch or more) is March 8. However, the respective dates of those events for the last 30 years are February 20 and March 1. Link to comment Share on other sites More sharing options...
astarck Posted March 3, 2011 Share Posted March 3, 2011 Here's a start on temps... I'll do as much as I can stay interested in. =HIGHS= 1981-2010 AVGS (number of days) <50 = 9.5 (284 in 30 yrs) 70+ = 4.1 (122 in 30 yrs) 80+ = 0.8 (25 in 30 yrs) 32 or below = .3 (10 in 30 yrs) 3 days have been 90+ in MAR at DC -- all in 1907 (22nd, 23rd, 29th) Max Temp of Month 3/23/1907 - 93F Max Temp of recent (#4 overall) 3/12/1990 - 89F Records... <50 = 25 (1960) 70+ = 16 (1945) 80+ = 9 (1945) 32 or below = 7 (1960) =LOWS= 1981-2010 AVGS (number of days) 32 or below = 8 (240 in 30 yrs) Records... 32 or below = 24 (1960) Min Temp of Month 03/04/1873 - 4F Min Temp of recent (#32 overall) 3/3/2009 - 14F I think these stats would be interesting if they were split between March 1-15 and 16-31. Link to comment Share on other sites More sharing options...
MN Transplant Posted March 4, 2011 Share Posted March 4, 2011 We've already passed last year for latest freeze date. Link to comment Share on other sites More sharing options...
Ian Posted March 4, 2011 Author Share Posted March 4, 2011 We've already passed last year for latest freeze date. last yr was the earliest on record final freeze Link to comment Share on other sites More sharing options...
MN Transplant Posted March 4, 2011 Share Posted March 4, 2011 last yr was the earliest on record final freeze Yeah, last year was the transition from crazy snow to crazy heat. This year is the transition from boring (maybe a little windy) to boring. Link to comment Share on other sites More sharing options...
weatherMA Posted March 6, 2011 Share Posted March 6, 2011 D.C is due for some March snow. 3/17-3/20 would be a great time for that. Link to comment Share on other sites More sharing options...
Ian Posted March 9, 2011 Author Share Posted March 9, 2011 Since the storm coming up looks like a big QPFer on models here are the top (1.5"+ daily totals for MAR at DC) -- Tomorrow I will post some two-day totals. 03/09/1881.....2.79 03/12/1878.....2.6 3/13/1993.....2.29 3/26/1978.....2.16 3/21/1918.....2.15 3/19/1958.....2.12 3/8/1995.....1.97 3/20/2003.....1.95 3/23/2005.....1.85 03/22/1891.....1.83 03/31/1886.....1.82 3/21/2000.....1.82 3/27/1919.....1.81 3/16/2007.....1.79 03/19/1884.....1.77 3/3/1909.....1.75 3/21/1924.....1.75 03/10/1871.....1.72 3/14/1940.....1.66 03/11/1888.....1.65 3/2/1994.....1.65 3/29/1912.....1.64 3/28/1994.....1.63 3/12/1912.....1.61 03/25/1876.....1.6 3/20/1958.....1.6 03/27/1891.....1.59 3/30/1974.....1.59 3/12/1968.....1.56 03/10/1883.....1.53 3/6/1932.....1.52 3/5/1965.....1.52 3/6/1943.....1.5 3/26/1992.....1.5 3/27/1994.....1.5 3/28/2005.....1.5 Link to comment Share on other sites More sharing options...
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