Prognostic Meteorological Discussion
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FXUS01 KWBC 230859
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
459 AM EDT THU MAY 23 2013

VALID 12Z THU MAY 23 2013 - 12Z SAT MAY 25 2013


...SLOW-MOVING COLD FRONT WILL FOCUS SHOWERS AND THUNDERSTORMS FOR
THE EAST COAST...

...COLD AND WET CONTINUES IN THE PACIFIC NORTHWEST AND NORTHERN
ROCKIES WITH WIDESPREAD FREEZE WATCHES AND WARNINGS IN EFFECT...

WARM AND HUMID CONDITIONS IN THE EAST WILL GIVE WAY TO SCATTERED
SHOWERS AND THUNDERSTORMS THURSDAY AND THURSDAY NIGHT. SOME STORMS
MAY BECOME SEVERE OVER PORTIONS OF THE NORTHERN MID-ATLANTIC
STATES. THE WEATHER TURNS COOLER BEHIND THE FRONT...WITH HIGH
TEMPERATURES ON FRIDAY FALLING BACK 15-25 DEGREES FROM HIGHS ON
THURSDAY.

A DEEP TROUGH OF LOW PRESSURE IN THE NORTHWEST WILL CONTINUE TO
PRODUCE WELL BELOW NORMAL TEMPERATURES...SHOWERS AND A FEW
THUNDERSTORMS IN THE ROCKIES. UNUSUALLY LOW SNOW LEVELS AND
SNOWFALL ACCUMULATIONS HAVE ALREADY BEEN OBSERVED OVER INTERIOR
SECTIONS OF WASHINGTON AND ALONG THE CONTINENTAL DIVIDE. THE
POTENTIAL FOR BRIEF PERIODS OF SNOW AND SNOW SHOWERS REMAINS A
POSSIBILITY THROUGH FRIDAY NIGHT.

FOR THE GREAT LAKES AND MIDWEST...COLD HIGH PRESSURE WILL PREVAIL
IN THE THE EARLY PART OF THE HOLIDAY WEEKEND. SCATTERED LIGHT
FROSTS ARE POSSIBLE ACROSS THE UPPER MIDWEST AND NEAR THE
LAKES...AND HIGH TEMPERATURES WILL LIKELY BE A GOOD 10-15 DEGREES
BELOW NORMAL FOR LATE MAY.

VOJTESAK

GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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