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.

Day 4-8 Convective Outlook Issued on Jun 22, 2009
Updated: Mon Jun 22 08:44:03 UTC 2009
Day 4-8 Convective Outlook Graphics Issued on Jun 22, 2009

Note: A severe weather area depicted in the Day 4-8 period indicates a 30% or higher probability for severe thunderstorms within 25 miles of any point.

D4Thu, Jun 25, 2009 - Fri, Jun 26, 2009 D7Sun, Jun 28, 2009 - Mon, Jun 29, 2009
D5Fri, Jun 26, 2009 - Sat, Jun 27, 2009 D8Mon, Jun 29, 2009 - Tue, Jun 30, 2009
D6Sat, Jun 27, 2009 - Sun, Jun 28, 2009 (All days are valid from 12 UTC - 12 UTC)

 Forecast Discussion

   ZCZC SPCSWOD48 ALL
   ACUS48 KWNS 220843
   SPC AC 220843
   
   DAY 4-8 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0343 AM CDT MON JUN 22 2009
   
   VALID 251200Z - 301200Z
   
   ...PREDICTABILITY TOO LOW TO DELINEATE A SVR RISK AREA...
   
   MEDIUM RANGE FORECAST GUIDANCE CONTINUES TO EXHIBIT LARGE SPREAD
   CONCERNING SHORT WAVE DEVELOPMENTS WITHIN THE MAIN BELT OF
   WESTERLIES NEAR THE CANADIAN/U.S. BORDER AREA LATE THIS WEEK INTO
   NEXT WEEKEND.  THERE ARE INDICATIONS THAT A CLOSED LOW/TROUGH NOW
   DEVELOPING WEST OF THE CALIFORNIA COAST MAY FINALLY BE FORCED TO
   LIFT INLAND BY THURSDAY IN RESPONSE TO ONE SIGNIFICANT IMPULSE
   APPROACHING THE PACIFIC NORTHWEST COAST.  THIS SYSTEM PROBABLY WILL
   BECOME INCREASINGLY SHEARED IN A BROADLY CONFLUENT REGIME TO THE
   NORTHWEST OF A LINGERING SUBTROPICAL HIGH CENTERED OVER THE SOUTH
   CENTRAL STATES.  BUT...GIVEN ANTECEDENT MOISTENING...IT IS A
   DISTINCT POSSIBILITY THAT FORCING/SHEAR MAY REMAIN SUFFICIENT TO
   SUPPORT AN INCREASING RISK FOR SEVERE STORMS ACROSS THE FOUR CORNERS
   REGION AND EASTERN GREAT BASIN.  HOWEVER...UNCERTAINTIES ARE STILL
   JUST TOO LARGE AT THE PRESENT TIME TO CONFIDENTLY DELINEATE A SEVERE
   RISK AREA.
   
   ..KERR.. 06/22/2009

   CLICK TO GET WUUS48 PTSD48 PRODUCT

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:
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities