beavis1729 Posted November 13, 2012 Share Posted November 13, 2012 That 85 airmass was the real deal. Those record/really low temps weren't achieved with anything close to optimal radiational cooling. It was super cold air advection at work. There was a pocket of -30C air over LAF around the time of that observation. Combine that with snow cover at the coldest time of the year and crazy things can happen. Another good ob from that event... -13F with light snow on the evening of the 19th...probably one of the coldest temps with snow at LAF. METAR KLAF 200300Z 30015G20KT 5SM -SN OVC010 M25/M33 A3011 RMK PCPN VRY LGT SLP218 T12491327 Nice...I was only 10 years old at the time. I wish I would've remembered that day! Link to comment Share on other sites More sharing options...
Chicago Storm Posted November 14, 2012 Share Posted November 14, 2012 ORD 7/23/11... 3.19" of rain in an hour. KORD 230751Z 33011G22KT 1 3/4SM +TSRA BR FEW001 BKN010 OVC035CB 22/21 A3002 RMK AO2 PK WND 33026/0710 SLP159 FRQ LTGICCCCG OHD AND ALQDS CB OHD AND ALQDS MOV SE P0319 T02170211 Link to comment Share on other sites More sharing options...
wxman_ind Posted November 14, 2012 Share Posted November 14, 2012 I will never forget that day. At like 7:00 AM I had to walk from my apartment all the way across campus to get to the weather department to post the day's weather maps. I became sick soon after that! -17º (-43º WC, -58º on the old scale) at about the time I usually headed out for my first class back on Jan 18, 1994. METAR KLAF 181300Z 28015KT 7SM -BLSN SCT015 M27/M32 A3038 RMK SLPNO T12731323 Link to comment Share on other sites More sharing options...
Chicago WX Posted November 14, 2012 Share Posted November 14, 2012 I will never forget that day. At like 7:00 AM I had to walk from my apartment all the way across campus to get to the weather department to post the day's weather maps. I became sick soon after that! Ouch. My walk that day would've been Harrison Hall to EE...alas, didn't have to make it that day with classes cancelled. We did walk to Mackey that night to watch Purdue and IU play. Big Dog era...had to. Of course it was -20º at 8am the next day on my walk to class. Never will forget it. METAR KLAF 191300Z 30005KT 15SM SCT150 M29/M32 A3064 RMK SLPNO T12891323 Link to comment Share on other sites More sharing options...
cyclone77 Posted November 14, 2012 Share Posted November 14, 2012 Feb 2, 1996 was the coldest day I can remember. The high for the day was only -11, but that actually happened at midnight. The daytime high was only -14! It was still -20 at 11am, and -18 at noon. It got down to -27 the next morning. A couple years ago (2008 or 2009) we hit -32 here in Erie. That was the coldest morning temp I ever felt, but the temps that day warmed up higher than this day back in 1996 . 12:00 PM -18.0 °F -30.9 °F -29.0 °F 57% 30.70 in 10.0 mi WNW 4.6 mph - N/A Unknown All the obs that day at MLI http://www.wundergro...eq_statename=NA Link to comment Share on other sites More sharing options...
cyclone77 Posted November 14, 2012 Share Posted November 14, 2012 January 16, 2009. Hit -32 at my house here in Erie. -34 at Sterling just up the river. 7:55 AM -34.6 °F - - N/A% 30.70 in 10.0 mi Calm Calm - N/A Clear Link to comment Share on other sites More sharing options...
famartin Posted November 15, 2012 Share Posted November 15, 2012 I really dont understand METAR's very well...but my favorite off the top of my head, obviously most recent memory, is DTW's 7pm obs from Feb 20, 2011 METAR KDTW 202353Z COR 08009G15KT 1/8SM R04R/2400V4000FT +TSSN FZFG OVC006CB M02/M03 A2988 RMK AO2 TWR VIS 1/2 TSB47PLB04E18 SLP127 OCNL LTGIC ALQDS AND OHD TS ALQDS AND OHD MOV E P0016 60054 T10221028 10000 21022 In lamens terms the obs was: 28F Heavy Thunderstorms and Snow Visib 0.06 mi This METAR seems longer than some of the ones you guys posted, can anyone explain it for the METAR-illiterate like myself lol? I was in that blinding snow, vivid lightning, and crashing thunder...took me by surprise, and though I have experienced thundersnow several times, the thundersnow of March 4, 2008 and February 20, 2011 was unreal, it sounded as violent as a strong summer thunderstorm. Part by part: METAR KDTW 202353Z COR 08009G15KT 1/8SM R04R/2400V4000FT +TSSN FZFG OVC006CB M02/M03 A2988 RMK AO2 TWR VIS 1/2 TSB47PLB04E18 SLP127 OCNL LTGIC ALQDS AND OHD TS ALQDS AND OHD MOV E P0016 60054 T10221028 10000 21022 METAR = Scheduled hourly observation in METAR format KDTW = Detroit Metro Airport 202353Z = 20th day of the month, 2353 GMT COR = Corrected 08009G15KT = Wind from 80 degrees at 9 knots gusting to 15 knots 1/8SM = Prevailing visibility 1/8th mile R04R/2400V4000FT = Runway 04R visibility 2400 feet varying to 4000 feet +TSSN = Heavy thunderstorm snow FZFG = Freezing fog OVC006CB = Overcast cumulonimbus cloud base 600 feet above ground M02/M03 = Temperature -2C, dew point -3C A2988 = Altimeter 29.88 inches RMK = Remarks follow AO2 = Station has an automated present weather sensor TWR VIS 1/2 = Visibility from the control tower 1/2 mile TSB47PLB04E18 = Thunderstorm began 47 minutes after the top of the last hour, ice pellets began 4 minutes after the top of the last hour and ended 18 minutes after the top of the last hour SLP127 = Sea level pressure 1012.7 millibars OCNL LTGIC ALQDS AND OHD = Occasional in-cloud lightning all quadrants and overhead TS ALQDS AND OHD MOV E = Thunderstorm all quadrants and overhead moving east P0016 = 0.16" of liquid-equivalent precipitation in the last hour 60054 = 0.54" of liquid-equivalent precipitation in the last 6 hours T10221028 = Temperature 28F (-2.2C), dew point 27F(-2.8C) 10000 = Maximum temperature in the last 6 hours was 32F (0.0C) 21022 = Minimum temperature in the last 6 hours was 28F (-2.2C) Link to comment Share on other sites More sharing options...
michsnowfreak Posted November 15, 2012 Share Posted November 15, 2012 Part by part: METAR KDTW 202353Z COR 08009G15KT 1/8SM R04R/2400V4000FT +TSSN FZFG OVC006CB M02/M03 A2988 RMK AO2 TWR VIS 1/2 TSB47PLB04E18 SLP127 OCNL LTGIC ALQDS AND OHD TS ALQDS AND OHD MOV E P0016 60054 T10221028 10000 21022 METAR = Scheduled hourly observation in METAR format KDTW = Detroit Metro Airport 202353Z = 20th day of the month, 2353 GMT COR = Corrected 08009G15KT = Wind from 80 degrees at 9 knots gusting to 15 knots 1/8SM = Prevailing visibility 1/8th mile R04R/2400V4000FT = Runway 04R visibility 2400 feet varying to 4000 feet +TSSN = Heavy thunderstorm snow FZFG = Freezing fog OVC006CB = Overcast cumulonimbus cloud base 600 feet above ground M02/M03 = Temperature -2C, dew point -3C A2988 = Altimeter 29.88 inches RMK = Remarks follow AO2 = Station has an automated present weather sensor TWR VIS 1/2 = Visibility from the control tower 1/2 mile TSB47PLB04E18 = Thunderstorm began 47 minutes after the top of the last hour, ice pellets began 4 minutes after the top of the last hour and ended 18 minutes after the top of the last hour SLP127 = Sea level pressure 1012.7 millibars OCNL LTGIC ALQDS AND OHD = Occasional in-cloud lightning all quadrants and overhead TS ALQDS AND OHD MOV E = Thunderstorm all quadrants and overhead moving east P0016 = 0.16" of liquid-equivalent precipitation in the last hour 60054 = 0.54" of liquid-equivalent precipitation in the last 6 hours T10221028 = Temperature 28F (-2.2C), dew point 27F(-2.8C) 10000 = Maximum temperature in the last 6 hours was 32F (0.0C) 21022 = Minimum temperature in the last 6 hours was 28F (-2.2C) WOW thank you so MUCH!!! Link to comment Share on other sites More sharing options...
Chinook Posted November 15, 2012 Share Posted November 15, 2012 December 31, 2010. I was driving through varying ground blizzard conditions in Nebraska. The snow was not sticking to the road. It was like patches of fog moving at 35mph. Sometimes I could see only about 20 ft in front of my car. It was 5 degrees in Ogallala Nebraska, with 35mph wind gusts as a headwind. It was almost like being on a different planet, or the South Pole, or something. It wasn't too scary. But the smallest amount of ice or slippery and/or thick snow on the road, and I would have been very scared. KOGA 312230Z AUTO 32024G30KT 1/2SM -SN OVC009 M14/M17 A2964 RMK AO2 T11411172 Link to comment Share on other sites More sharing options...
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