Prognostic Meteorological Discussion
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000
FXUS01 KWBC 250626
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
225 AM EDT THU AUG 25 2016

VALID 12Z THU AUG 25 2016 - 12Z SAT AUG 27 2016

...SEVERE THUNDERSTORMS AND HEAVY RAIN POSSIBLE FOR PORTIONS OF
THE SOUTHERN/CENTRAL PLAINS AND THE LOWER GREAT LAKES...

...ABOVE AVERAGE TEMPERATURES EXPECTED TO CONTINUE FOR THE PACIFIC
NORTHWEST...

A COLD FRONT WILL MOVE ACROSS THE GREAT LAKES, MID-MISSISSIPPI
VALLEY, AND CENTRAL/SOUTHERN PLAINS TODAY BRINGING SCATTERED TO
NUMEROUS SHOWERS AND THUNDERSTORMS. SOME THUNDERSTORMS MAY BE
SEVERE ACROSS PORTIONS OF THE CENTRAL/SOUTHERN PLAINS AS WELL AS
ACROSS PORTIONS OF THE LOWER GREAT LAKES. PLEASE REFER TO PRODUCTS
ISSUED BY THE STORM PREDICTION CENTER FOR FURTHER DETAILS ON THE
SEVERE WEATHER THREAT. HEAVY RAINFALL WILL ALSO BE POSSIBLE,
ESPECIALLY ACROSS THE CENTRAL/SOUTHERN PLAINS. TONIGHT INTO
FRIDAY, THE FRONT WILL SPREAD SHOWERS AND THUNDERSTORMS INTO THE
NORTHEAST, BEFORE MOVING OFFSHORE BY FRIDAY EVENING, LEAVING DRY
CONDITIONS IN ITS WAKE. ACROSS THE PLAINS, HOWEVER, THE FRONT IS
FORECAST TO BECOME STATIONARY AND LINGER THROUGH FRIDAY BEFORE A
NEW WAVE OF LOW PRESSURE DEVELOPS ALONG IT BY FRIDAY NIGHT AND
SATURDAY. THIS WILL KEEP PERIODS OF STORMY WEATHER POSSIBLE ACROSS
THE PLAINS FRIDAY, EVENTUALLY SPREADING INTO THE MIDWEST AS WELL
BY SATURDAY.

MEANWHILE, THE PACIFIC NORTHWEST REMAINS ON THE EASTERN PERIPHERY
OF A LARGE UPPER-LEVEL RIDGE OF HIGH PRESSURE CENTERED OVER THE
NORTH PACIFIC. THIS WILL KEEP DRY AND HOT CONDITIONS IN PLACE
ACROSS THE PACIFIC NORTHWEST THROUGH THE NEXT COUPLE DAYS. HIGH
TEMPERATURES TODAY AND FRIDAY ARE EXPECTED TO BE 10 TO 20 DEGREES
ABOVE AVERAGE ACROSS WESTERN WASHINGTON AND OREGON. SOMEWHAT
COOLER WEATHER WILL ARRIVE BY SATURDAY AS THE RIDGE BREAKS DOWN
ACROSS THE NORTHWEST ALLOWING AN UPPER-LEVEL TROUGH TO APPROACH.

RYAN


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