Tuesday, April 6, 2010

Severe Thunderstorm Watch

Severe Thunderstorm Watch cancelled for Winnebago, Lee, Ogle, DeKalb and McHenry Counties

7:21am: Cherry Valley - Winnebago Co: Hail - 1.00"

Forecast Discussion - Storms will continue to move through this morning with rain likely for the remainder of the morning.  Storms developed along a warm front that lies just to the south of the Stateline.  That combined with the low level jet (stronger winds in the lower levels of the atmosphere) helped to bring moisture into Iowa this morning.  Storms moved east/northeast this morning causing heavy rain and hail.  We were getting some reports up to 1.00" hail around the Rockford area.  There may be a few more storms that develop as the morning wears on, but the anticipation is that the warm front will lift to the north eventually clearing us out for the afternoon.  As it does, winds will also begin to pick up from the south becoming very gusty at times.  Our attention will then turn to a cold front that will move in later this evening and overnight.  That will be the next threat for strong to severe thunderstorms with hail and damaging winds likely. 

Severe Thunderstorm Watch is cancelled for Stephenson, Jo Daviess, Carroll and Whiteside Co. and continues for Winnebago, Boone, Ogle, Lee, DeKalb and McHenry Co. until 9am.
6:35am Update:  Storm reports - Forreston - Ogle Co: 0.50" hail
                                                   Rockford - Winnebago Co: 0.50" hail

6:30am Update:  Storms continue to move to the east this morning now moving into the Rockford Metro area.  Storms will continue to fire along the warm front as it lifts to the north this morning. 

6:07am Update:  Severe Thunderstorm Warning for Stephenson County until 6:15am. 

Severe Thunderstorm Warning for Boone, Lee, Ogle and Winnebago Co until 6:30am.  Storms continue to move to the east around 50-60 mph this morning.

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