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Feb. 19th-22nd Winter Storm Part 2


wisconsinwx

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Just punched out a 06Z SmartModel run, added several more cities in MN,IA,SD. Right now heaviest snow potential is looking from a line from Aberdeen, SD to a Minneapolis, to Madison, WI line. Seeing potential for 10-13" of snow fall possible over the next 48 hours. Seeing some impressived forecast hourly snowfall rates of over 1.5" per hour. Other cities I see are Dubuque around 9", Lacrosse and Oshkosh around 10". Thoughts?

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dtx updates for my areas...

Sunday: A chance of snow before noon, then snow, possibly mixed with sleet. High near 31. Southeast wind between 7 and 13 mph. Chance of precipitation is 90%. New snow and sleet accumulation of 1 to 3 inches possible.

Sunday Night: Snow, freezing rain, and sleet. Low around 28. East northeast wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New ice accumulation of 0.2 to 0.4 of an inch possible. New snow and sleet accumulation of 2 to 4 inches possible.

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yesterdays 12z run forecasted high temperature at my house = 51

yesterdays observed high 6 hours later= 72

:facepalm:

Fail everywhere. The NAM only 24 hrs ago was trying to drop loads of qpf over northern MN. This storm has given the NAM fits with the two moving parts with the elongated vortex and the western trough. It just has no clue.

As for the temp fail--that is pretty pathetic. Did any guidance do well with the temps out E? All guidance failed here for our torch too. Seemingly overdid the snowpack temps as most areas were well above guidance.

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Fail everywhere. The NAM only 24 hrs ago was trying to drop loads of qpf over northern MN. This storm has given the NAM fits with the two moving parts with the elongated vortex and the western trough. It just has no clue.

As for the temp fail--that is pretty pathetic. Did any guidance do well with the temps out E? All guidance failed here for our torch too. Seemingly overdid the snowpack temps as most areas were well above guidance.

The GFS was a bit better, but to directly answer your question..not really. My snowpack is pretty much gone now. We've just got some piles left. Far cry from the 3' depth less than a month ago.

The NAM has been incredibly unstable this winter--and that's being nice, too.

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DTX going with a WSW with 6"+ of snow north of I-69, 4-8" of snow with up to .25" ice along the M-59 corridor and 1-3" sleet/snow with .25"+ ice for the City south, with even a chance at a change over to rain at the border. Talk about one hell of a forecast there, and a highly variable one at that.

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Yuck. MKE just updated the forecast here:

Sunday...Snow. Snow accumulation of 8 to 9 inches. Ice accumulation of up to one quarter of an inch. Highs in the lower 30s. East winds 10 to 20 mph. Chance of snow 90 percent.

Sunday Night...Snow and chance of light freezing rain through around midnight...then light snow likely after midnight. Snow accumulation of 2 to 3 inches. Total snow accumulation 10 to 12 inches. Lows around 20. Northeast winds 15 to 20 mph. Chance of precipitation 80 percent.

10-12 inches of snow, .25 QPF ice.

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Yuck. MKE just updated the forecast here:

Sunday...Snow. Snow accumulation of 8 to 9 inches. Ice accumulation of up to one quarter of an inch. Highs in the lower 30s. East winds 10 to 20 mph. Chance of snow 90 percent.

Sunday Night...Snow and chance of light freezing rain through around midnight...then light snow likely after midnight. Snow accumulation of 2 to 3 inches. Total snow accumulation 10 to 12 inches. Lows around 20. Northeast winds 15 to 20 mph. Chance of precipitation 80 percent.

10-12 inches of snow, .25 QPF ice.

Looks like a solid forecast, my model is going for 12.9" total snow for MKE and .3" of Ice. Highest threat for the FZRA is 22Z on the 20th through 21st at 05Z. Also picking up on some TSPL mixed in with the FZRA period for you guys. Time to see if it verifies.

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rgem 06z further w/n at 36...post hr 48 in a few

LOL wow. RGEM is amped up. I am a little surprised to actually see it come in even stronger and farther NW. A tad ridiculous IMO--but an amped solution is still not off the table. Personally I like a track a tick N of the 18z/0Z GFS ops and 03Z SREF--but the RGEM is taking it along the MN border--wow.

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LOL wow. RGEM is amped up. I am a little surprised to actually see it come in even stronger and farther NW. A tad ridiculous IMO--but an amped solution is still not off the table. Personally I like a track a tick N of the 18z/0Z GFS ops and 03Z SREF--but the RGEM is taking it along the MN border--wow.

Yeah unless the other models trend toward it, I would lean towards it being crap, especially since the GGEM was south by a considerable margin.

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