PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0440 AM CDT THU JUN 07 2007
...HIGH RISK OF SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE
UPPER MISSISSIPPI RIVER VALLEY AND THE WESTERN GREAT LAKES LATER
TODAY AND TONIGHT...
THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF STRONG TORNADOES ALONG WITH WIDESPREAD DAMAGING WINDS
AND LARGE HAIL OVER PARTS OF THE UPPER MISSISSIPPI RIVER VALLEY AND
THE GREAT LAKES LATER TODAY AND TONIGHT.
THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
EASTERN IOWA
NORTHERN ILLINOIS
UPPER PENINSULA OF MICHIGAN
EASTERN MINNESOTA
WISCONSIN
SURROUNDING THE HIGH RISK AREA...THERE IS A MODERATE RISK OF SEVERE
THUNDERSTORMS FROM PARTS OF THE UPPER AND MIDDLE MISSISSIPPI RIVER
VALLEY INTO THE CENTRAL GREAT LAKES.
AN UNSEASONABLY STRONG WEATHER SYSTEM CONTINUES TO EJECT OUT OF THE
ROCKIES AND ACROSS THE NORTHERN AND CENTRAL PLAINS TODAY...WITH
ASSOCIATED SURFACE LOW PRESSURE SYSTEM LIFTING ACROSS NORTHERN
MINNESOTA. IN RESPONSE...VERY STRONG LOW LEVEL AND UPPER LEVEL
WINDS WILL OVERSPREAD A LARGE PART OF THE MIDDLE U.S. AND SUPPORT
EXTREMELY STRONG WIND SHEAR FOR THIS TIME OF YEAR. THIS WILL SET
THE STAGE FOR A POSSIBLE OUTBREAK OF SEVERE THUNDERSTORMS
...INCLUDING TORNADOES...THIS AFTERNOON AND TONIGHT. STRONG AND
DAMAGING TORNADOES ALONG WITH WIDESPREAD WIND DAMAGE ARE EXPECTED IN
THIS REGION.
AS HEATING AND SURFACE MOISTURE INCREASE THROUGH THE MORNING AND
EARLY AFTERNOON...THE ATMOSPHERE WILL BECOME MORE SUPPORTIVE OF
THUNDERSTORMS DEVELOPING OVER PORTIONS OF CENTRAL MINNESOTA. SEVERE
THUNDERSTORMS WILL BECOME MORE WIDESPREAD AND INTENSIFY QUICKLY
THROUGH THE DAY ACROSS MUCH OF THE UPPER MISSISSIPPI RIVER
VALLEY...WITH DEVELOPMENT OCCURRING SOUTH-SOUTHWESTWARD ALONG A
SURFACE COLD FRONT ACROSS EASTERN IOWA AND POSSIBLY NORTHEASTERN
MISSOURI BY LATE IN THE DAY. EXTREME SHEAR WILL SUPPORT SUPERCELLS
AND FAST MOVING LINES OF THUNDERSTORMS ACROSS THIS REGION...WITH
POTENTIAL FOR AN OUTBREAK OF TORNADOES AND DAMAGING WINDS AS STORMS
RACE EAST-NORTHEASTWARD THROUGH THE EVENING INTO THE GREAT LAKES.
LARGE HAIL WILL ALSO BE COMMON WITH THESE STORMS.
THIS IS POTENTIALLY A VERY DANGEROUS SITUATION. THOSE IN THE
THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND
TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR
POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
..EVANS.. 06/07/2007
http://www.spc.noaa.gov/products/outlook/pwo.html
http://www.spc.noaa.gov/products/outlook/day1otlk.html