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Oct 21, 2014 1730 UTC Day 2 Convective Outlook
Updated: Tue Oct 21 17:14:04 UTC 2014 (Print Version | 20141021 1730Z Day 2 shapefile | 20141021 1730Z Day 2 KML)
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 Forecast Discussion

   SPC AC 211714

   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1214 PM CDT TUE OCT 21 2014

   VALID 221200Z - 231200Z

   ...NO SVR TSTM AREAS FORECAST...

   ...SUMMARY...
   ISOLATED THUNDERSTORMS ARE FORECAST ACROSS THE UPPER MISSISSIPPI
   VALLEY...MIDDLE MISSOURI RIVER VALLEY...CENTRAL PLAINS AND SOUTHWARD
   INTO THE SOUTHERN HIGH PLAINS AND RIO GRANDE VALLEY WEDNESDAY. A FEW
   STORMS WILL ALSO BE POSSIBLE OVER SOUTHERN FLORIDA...THE MIDDLE
   ATLANTIC COAST INTO COASTAL NEW ENGLAND AND A SMALL PART OF THE
   PACIFIC NORTHWEST.

   ...SYNOPSIS...

   ERN U.S. UPPER TROUGH WILL EVOLVE INTO A CLOSED LOW AND STALL OFF
   THE MID ATLANTIC COAST. MEANWHILE...UPPER TROUGH CURRENTLY MOVING
   THROUGH THE NRN AND CNTRL ROCKIES WILL PHASE WITH A WEAK SRN STREAM
   TROUGH AND CONTINUE THROUGH THE PLAINS WEDNESDAY...REACHING THE MS
   VALLEY AREA LATER WEDNESDAY NIGHT. 

   THE NRN STREAM TROUGH WILL BE ACCOMPANIED BY A COLD FRONT THAT WILL
   ADVANCE THROUGH THE NRN AND CNTRL PLAINS...REACHING THE UPPER MS
   VALLEY REGION WEDNESDAY NIGHT. AN OCCLUDED SFC LOW EXPECTED TO BE
   JUST OFF THE MID-ATLANTIC SEABOARD WEDNESDAY MORNING WILL DEVELOP
   NWD DURING THE DAY.  

   ...PLAINS THROUGH UPPER MS VALLEY...

   OWING TO OFFSHORE NEAR SFC WINDS OVER THE GULF...INSTABILITY WILL
   REMAIN LIMITED OVER THE PLAINS AND MS VALLEY. NEVERTHELESS...AT
   LEAST WEAK MUCAPE /200-400 J/KG/ WILL EXIST AHEAD OF THE UPPER
   TROUGH WITHIN PLUME OF 6.5-7 C/KM MID-LEVEL LAPSE RATES AND MODEST
   MOISTURE BEING DRAWN NEWD ABOVE THE SFC LAYER. SCATTERED SHOWERS AND
   ISOLATED THUNDERSTORMS WILL LIKELY DEVELOP OVER THE PLAINS AS ZONE
   OF DEEPER ASCENT SHIFTS EAST...REACHING THE UPPER MS VALLEY
   WEDNESDAY AFTERNOON AND EVENING. 

   ...ELSEWHERE...

   A FEW SHOWERS AND ISOLATED THUNDERSTORMS WILL BE POSSIBLE IN
   VICINITY OF A WEAK FRONT OVER SRN FL...IN ASSOCIATION WITH CLOSED
   UPPER LOW ALONG THE MID-ATLANTIC AND SRN NEW ENGLAND COASTS AS WELL
   AS OVER COASTAL WASHINGTON STATE.

   ..DIAL.. 10/21/2014

   CLICK TO GET WUUS02 PTSDY2 PRODUCT

   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z

        
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Page last modified: October 21, 2014
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