Prognostic Meteorological Discussion
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FXUS01 KWBC 290629
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
229 AM EDT MON MAY 29 2017

VALID 12Z MON MAY 29 2017 - 12Z WED MAY 31 2017

...SEVERE THUNDERSTORMS AND LOCALLY HEAVY RAIN POSSIBLE FOR
PORTIONS OF THE SOUTHEAST AND GULF COAST STATES...

...CONTINUED ABOVE AVERAGE TEMPERATURES EXPECTED FOR THE INTERIOR
PACIFIC NORTHWEST AND GREAT BASIN...

AN UPPER-LEVEL TROUGH ACROSS WILL PERSIST ACROSS THE GREAT LAKES
THROUGH THE NEXT COUPLE DAYS. A SERIES OF COLD FRONTS WILL AFFECT
AREAS FROM THE PLAINS AND THE MIDWEST TO THE EAST COAST,
ASSOCIATED WITH MULTIPLE UPPER-LEVEL DISTURBANCES ROTATING AROUND
THE SYSTEM. A SLOW-MOVING TO STATIONARY FRONTAL BOUNDARY WILL
BRING SCATTERED TO NUMEROUS SHOWERS AND STORMS TODAY AND TONIGHT
FROM SOUTHERN TEXAS ALONG THE GULF COAST, AND ACROSS THE
SOUTHEAST. SOME THUNDERSTORMS COULD BE SEVERE, ESPECIALLY ACROSS
THE SOUTHEAST. PLEASE REFER TO PRODUCTS ISSUED BY THE STORM
PREDICTION CENTER FOR FURTHER DETAILS ON THE SEVERE WEATHER
THREAT. LOCALLY HEAVY RAIN WILL ALSO BE POSSIBLE. THIS FRONT WILL
LINGER INTO TUESDAY, WITH SCATTERED AREAS OF SHOWERS AND
THUNDERSTORMS EXPECTED FOR MUCH OF THE SOUTHERN U.S. ONCE AGAIN.
FARTHER NORTH, THE NORTHERN PORTION OF THE SAME FRONTAL BOUNDARY
WILL BRING WIDESPREAD SHOWERS AND A FEW THUNDERSTORMS TO THE
NORTHEAST TODAY AND TONIGHT. ON TUESDAY, ANOTHER FRONTAL SYSTEM
WILL APPROACH, BRINGING ANOTHER POTENTIAL ROUND OF SHOWERS AND
THUNDERSTORMS TO THE NORTHEAST. BY LATE TUESDAY, YET ANOTHER COLD
FRONT WILL CROSS THE CENTRAL PLAINS AND MID-MISSISSIPPI VALLEY,
PRODUCING ADDITIONAL SCATTERED SHOWERS AND THUNDERSTORMS.

HIGH PRESSURE ALOFT WILL BEGIN TO SHIFT EASTWARD FROM THE WEST
COAST INTO THE ROCKIES THROUGH THE NEXT COUPLE DAYS. THIS WILL
ALLOW THE ABOVE AVERAGE TEMPERATURES TO SHIFT EAST AS WELL.
TEMPERATURES ARE FORECAST TO RISE WELL INTO THE 90S TODAY AND
TOMORROW FOR THE INTERIOR NORTHWEST, 10 TO 20 DEGREES ABOVE
AVERAGE. COOLER PACIFIC AIR WILL BEGIN TO SPREAD INTO COASTAL
AREAS OF THE NORTHWEST ON TUESDAY AS THE RIDGE OF HIGH PRESSURE
BEGINS TO SHIFT EAST. BY WEDNESDAY, THE CENTER OF ABOVE AVERAGE
TEMPERATURES WILL SHIFT TO THE NORTHERN ROCKIES, WHILE THE
NORTHWEST WILL SEE A BIT OF A RESPITE FROM THE HOT TEMPERATURES AS
A PACIFIC FRONTAL SYSTEM APPROACHES.

RYAN


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

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