IT'S A GO FOR SNOW, ONCE AGAIN...
LIMITED COPIES LEFT:
A SECOND PRINTING OF MY NEW BOOK IS ON THE WAY...
250 NEW COPIES OF DERECHO 911, IOWA'S INLAND HURRICANE ARE AVAILABLE. Around Christmas we sold the last of the 1500 copies of our book on this historic thunderstorm, the most damaging in U.S. history. Due to continued demand we have ordered a limited number of 250 for those of you interested in having the most authoritative account of this extreme event. You can get yours at derechobook.com
IT'S A GO FOR SNOW
I've seen the morning data and overall there are no drastic changes. Most models were consistent with their previous runs, especially the EURO so I'm leaning on it as my preferred solution. This is its snowfall forecast hot off the press 24 hours before the event begins. Remember, this is not a forecast per say, just raw model output that's used as guidance to make forecasts. In other words, its not exact but a good reflection of the trends and what to expect.
As you can see, the greatest impacts are expected within a corridor extending roughly from HWY 20 to I-80 where a range of 4-8" is looking likely. (perhaps a few spots in NW Illinois could see 9-10" totals). Further north or south of the main band 2-4: amounts are expected. The area near and south of I-80 may also have a period of icing or mixed precipitation before changing to snow Saturday afternoon and evening. Will need to keep tabs on that situation. You can see winter storm watches are in place where the heaviest snow is expected and I would assume much of this area will be upgraded to a winter storm warning by the NWS later today. Advisories may be issued for a row of counties further north and south.
Currently the NWS has these story boards out highlighting what to expect
This is the current NWS thinking for snowfall in my area. The EURO is heavier further west into Iowa which is a trend to watch in further runs.
That's the latest, I will be back with you later this afternoon to upgrade the watch if necessary and to bring you fresh model input. Until then, roll weather...TS