Prognostic Meteorological Discussion
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000
FXUS01 KWBC 232000
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
359 PM EDT SAT SEP 23 2017

VALID 00Z SUN SEP 24 2017 - 00Z TUE SEP 26 2017

...COLD FOR THE WESTERN U.S. AND WARM FOR THE EASTERN STATES...

MUCH OF THE WESTERN U.S. WILL BE QUITE COOL INTO THE BEGINNING OF
THE WORK WEEK AS A DEEP UPPER-LEVEL TROUGH CONTINUES TO DIG IN
OVER THE WEST. BELOW SEASONAL NORMAL TEMPERATURES ARE FORECAST FOR
MUCH OF THE REGION. A FEW AREAS ACROSS THE INTERMOUNTAIN WEST WILL
HAVE LINGERING SNOW AT HIGHER ELEVATION INTO SUNDAY EVENING,
OTHERWISE, MOSTLY DRY CONDITIONS FOR THE VALLEYS AND LOWER
TERRAIN. AN EXTENSIVE FRONTAL ZONE WILL BE PRESENT FROM THE UPPER
GREAT LAKES THROUGH THE CENTRAL PLAINS INTO THE DESERT
SOUTHWEST/SOUTHERN ROCKIES. THIS BOUNDARY WILL HAVE MINIMAL
EASTWARD PROGRESSION OVER THE NEXT FEW DAYS DUE TO A STRONG RIDGE
ANCHORED OVER THE EAST. AS A RESULT SUMMER-LIKE HEAT AND
NOTICEABLE LEVELS OF HUMIDITY WILL BE PRESENT FROM THE PLAINS TO
THE EAST COAST.  SOME LOCATIONS COULD EVEN ACHIEVE RECORD HIGH
TEMPERATURES WITH READINGS BREAKING THE 90-DEGREE MARK.
WIDESPREAD AREAS WILL SEE TEMPERATURES RUNNING 10 TO 20 DEGREES
ABOVE NORMAL FOR THIS TIME OF YEAR.

ALONG THIS BOUNDARY, STRONG TO POTENTIALLY SEVERE THUNDERSTORMS
ARE EXPECTED TO DEVELOP ACROSS THE SOUTHERN/CENTRAL HIGH PLAINS -
POSSIBLY AS FAR NORTH AS CENTRAL MINNESOTA. PERIODS OF HEAVY
RAINFALL THAT COULD RESULT IN FLASH FLOODING WILL ALSO BE POSSIBLE
- WPC HAS IDENTIFIED A SLIGHT RISK FOR EXCESSIVE RAINFALL ALONG
THE FRONT THROUGH TUESDAY.  HURRICANE MARIA IS TRACKING
NORTH-NORTHWEST AND ITS FUTURE PATH, ALTHOUGH IS LOOKING LIKE IT
WILL STAY FAR OFFSHORE, MAY BRING SOME HEAVIER RAIN AND STRONGER
WINDS TO THE OUTER BANKS OF NORTH CAROLINA AND VIRGINIA. REFER TO
THE NATIONAL HURRICANE CENTER FOR ADDITIONAL DETAILS ON THAT STORM.

CAMPBELL


GRAPHICS AVAILABLE AT
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
$$





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