Originally posted by Bill Schintler+--><div class='quotetop'>QUOTE(Bill Schintler)</div>
<!--QuoteBegin-Bill Schintler
Forecast Snowfall amounts:
9\" - 12\" along and 20 mi either side of a Creston, IA, to Iowa City to Quad Cities line.
6\" - 9\" along and south of a Des Moines to Cedar Rapids to Clinton line.
3\" - 5\" along and south of a Storm Lake to Waterloo line.
South of a Creston to Washington line, a mixture of sleet and freezing rain will mix in with lighter snowfall totals. Further south in MO and IL, a very significant ice storm will occur.
- bill
Official snowfall totals:
Iowa City: 10"
Cedar Rapids: 12"
Clinton: 8"
Waterloo: 10"
Des Moines: 10.1"
http://www.crh.noaa.gov/dmx/snowfall.shtml
http://www.crh.noaa.gov/dvn/WeatherEvents/...all20050106.png
http://www.crh.noaa.gov/dvn/WeatherEvents/...0050106Snow.htm
General comments: it looks like some significantly heavier amounts in northeastern IA then forecasted... Alot of banding set up there in the deformation zone, along with much higher snow-to-liquid ratios there - perhaps well above 20:1 in northeastern IA. Also, as far as guidence, it looks like the GFS probably did the best for QPF from for the period 6hr to 24hr before the event, in Iowa. The 12Z Eta (yesterday) still had very high QPF in southeastern IA for the period ending 06Z, which in reality ended up getting dryslotted early in the evening. The GFS was also better for upper low position and strength, main vort max, and UVV's for the same period as these features tracked across IA yesterday evening - bill[/b]