[LeArc] More Info On Severe Weather Outbreak.

[Brandon Sullivan]

I will be working with the NWS DVN today helping with emergency 
communications. This is the last email I can send about today.. This is a 
very potent system. An emergency management conference call has been 
scheduled.. Spotters should prepare for activation by late afternoon, and 
someone will most likely need to start a weather net. More info below.

...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

73. All stay safe