Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NOAA's National Weather Service   Select to go to the NWS homepage
Storm Prediction Center
navigation bar left  
  navigation bar end cap


 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Mesoscale Discussion 331
< Previous MD         Next MD >
MD 331 graphic

   MESOSCALE DISCUSSION 0331
   NWS STORM PREDICTION CENTER NORMAN OK
   0137 AM CDT SUN APR 13 2014

   AREAS AFFECTED...FAR EAST CENTRAL IA/NRN IL/SRN WI

   CONCERNING...SEVERE THUNDERSTORM WATCH 72...

   VALID 130637Z - 130800Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 72
   CONTINUES.

   SUMMARY...A THREAT FOR STRONG TO LOCALLY SEVERE WINDS SHOULD BE
   MAINLY CONFINED ACROSS FAR EAST CENTRAL IA INTO FAR NRN IL...AND
   PERHAPS INTO ADJACENT FAR SRN WI THROUGH 07-09Z.  COUNTIES IN THE
   WAKE OF THE ENEWD MOVING BOWING LINE SEGMENT...NOW EXTENDING FROM 5
   WSW DBQ TO 20 WNW MLI...CAN BE CLEARED FROM WW 72.  MEANWHILE...
   EXPECTED ENEWD TRACK OF THIS BOW SHOULD REMAIN WITHIN THE CURRENT
   NRN IL COUNTIES THAT RESIDE IN WW 72. HOWEVER...A FEW ADDITIONAL
   COUNTIES MAY NEED TO BE ADDED...IF THIS BOW TAKES A MORE EWD
   TRAJECTORY.

   DISCUSSION...EARLY OVERNIGHT SURFACE ANALYSIS SHOWED A COLD FRONT
   EXTENDING WWD ACROSS FAR NRN IL...JUST S OF THE IL/WI BORDER...INTO
   FAR NWRN IL WHERE IT MERGED WITH A SWD MOVING NE-SW ORIENTED
   CONVECTIVE OUTFLOW BOUNDARY EXTENDING INTO FAR EAST CENTRAL IA.  A
   FAST-MOVING /NEAR 50 KT/ BOWING LINE SEGMENT...CURRENTLY MOVING INTO
   FAR EAST CENTRAL IA SHOULD CONTINUE TO TRACK ENEWD AND POSSIBLY MORE
   EWD THROUGH 07-09Z AS IT ADVANCES INTO FAR NRN IL.  WHILE THE
   STRONGEST REFLECTIVITY WITHIN THIS BOW WAS LOCATED N OF THE
   AFOREMENTIONED CONVECTIVE OUTFLOW...DVN WSR-88D SHOWED 60 KT WSWLY
   WINDS AT 0.5 KM AGL WHICH COULD STILL BE TRANSFERRED TO THE SURFACE.
   GIVEN THE POSITION OF THE OUTFLOW BOUNDARY AND COLD FRONT...THE
   GREATEST SEVERE WIND THREAT THROUGH 08-09Z SHOULD BE CONFINED TO FAR
   NRN IL AS THE BOWING LINE MOVES ENEWD FROM FAR EAST CENTRAL IA INVOF
   THE COLD FRONT.

   ..PETERS.. 04/13/2014


   ATTN...WFO...LOT...MKX...DVN...

   LAT...LON   42379091 42519035 42928993 42988875 43008780 42538774
               42178798 41808885 41528972 41309033 41319107 41459120
               41769093 42009091 42379091 

Top/All Mesoscale Discussions/Forecast Products/Home
Weather Topics:
Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

NOAA / National Weather Service
National Centers for Environmental Prediction
Storm Prediction Center
120 David L. Boren Blvd.
Norman, OK 73072 U.S.A.
spc.feedback@noaa.gov
Page last modified: April 13, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities