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Heavy Rain in the Appalachians and Central Gulf Coast; Heat Continues in the West; Monitoring the Tropics

Heavy to excessive rainfall over the southern Appalachians and portions of the central Gulf Coast may bring areas of flooding today. Hot temperatures are in place through today across much of the western U.S. and New England. Tropical Storm Erin is forecast to become a Major Hurricane this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

November 20-21st, 2015 Southern Wisconsin Snow Storm

 

Southern Wisconsin was hit by a major snowstorm that was impressive for any time during a winter season, much less one that occurred in November.   The storm (surface low pressure) tracked from eastern/northeast Kansas early Friday evening,  November 20th, to St. Louis to Indianapolis by mid-day on the 21st.  But, typical for these early season lows, the warm Great Lakes likely resulted in a trof axis extending from the low north into Lake Michigan. This likely helped the moisture and forcing to reach farther north than that southern track would normally allow.

Below is the 2-day accumulation:

 

 

Here is a 24 hour loop of radar during the event.  The loop is composed of 30 minute time steps starting at 2 PM CST, November 20th and running through 1:30 PM CST November 21st, 2015.   Click the image for a larger version of the loop (about 7mb).

The table below is a collection of analyzed surface maps running from early evening on Friday through early afternoon on Saturday. 

Surface Map 7 PM Friday, November 21

Surface Map 10 PM Friday, November 21

Surface Map 1 AM Saturday, November 22

Surface Map 4 AM Saturday, November 22

Surface Map 7 AM Saturday, November 22

Surface Map 10 AM Saturday, November 22

Surface Map 1 PM Saturday, November 22

Surface Map 7 PM Friday, November 21

Surface Map 10 PM Friday, November 21

Surface Map 1 AM Saturday, November 22

Surface Map 4 AM Saturday, November 22

Surface Map 7 AM Saturday, November 22

Surface Map 10 AM Saturday, November 22

Surface Map 1 PM Saturday, November 22

 

Below are two graphics showing our forecast snow amounts made early Thursday and early Friday morning.

 

Forecast made early Thursday Morning

Forecast made early Friday morning

 


Davis