Prognostic Meteorological Discussion
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000
FXUS01 KWBC 221958
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
357 PM EDT MON AUG 22 2016

VALID 00Z TUE AUG 23 2016 - 00Z THU AUG 25 2016

...BELOW AVERAGE TEMPERATURES EXPECTED FROM THE OHIO VALLEY TO THE
NORTHEAST...

...TEMPERATURES WILL STEADILY WARM ACROSS THE PACIFIC NORTHWEST BY
MIDWEEK...

...STATIONARY FRONT TO KEEP SCATTERED SHOWERS AND STORMS POSSIBLE
ACROSS THE SOUTHERN STATES...

MUCH OF THE EASTERN U.S. IS EXPERIENCING A BREAK FROM THE HEAT NOW
THAT A COOLER AIR MASS HAS SPILLED IN BEHIND THE FRONTAL PASSAGE.
BELOW AVERAGE TEMPERATURES ARE FORECAST FROM THE OHIO VALLEY TO
THE NORTHEAST TO RANGE 5 TO 10 DEGREES COOLER THAN AVERAGE. HIGH
PRESSURE WILL REMAIN OVER THE EASTERN SEABOARD THROUGH MIDWEEK;
RESULTING IN COOLER AND DRY CONDITIONS. SHOWERS AND THUNDERSTORMS
WILL STEADILY INCREASE BY WEDNESDAY MORNING AND BEYOND OVER THE
GREAT LAKES, OHIO VALLEY AND MIDDLE MISSISSIPPI VALLEY AS A
SPRAWLING COLD FRONT PUSHES EAST THROUGH THE CENTRAL U.S.
TEMPERATURES WILL SLOWLY WARM TO NEAR OR SLIGHTLY ABOVE NORMAL
ACROSS THE EAST.

THE TRAILING END OF THE FRONT WILL BE REMAIN STATIONARY OVER THE
SOUTHEAST AND THE DEEP SOUTH OVER THE NEXT FEW DAYS. THIS BOUNDARY
WILL SERVE AS A FOCUS FOR SHOWERS AND THUNDERSTORMS TO DEVELOP
DAILY. FARTHER WEST, MONSOONAL MOISTURE WILL KEEP SCATTERED
SHOWERS AND STORMS IN THE FORECAST FOR THE SOUTHWESTERN U.S. AS
WELL.

THE COLD FRONT FRONT THAT BROUGHT AN END TO THE EXCESSIVE HEAT
ACROSS THE PACIFIC NORTHWEST WILL CONTINUE EAST AND CROSS THE
INTERMOUNTAIN WEST AND SPILL INTO THE NORTHERN AND CENTRAL HIGH
PLAINS. AS IT REACHES THE PLAINS, SHOWERS AND THUNDERSTORMS WILL
BEGIN TO DEVELOP ALONG AND AHEAD OF THE FRONT. SOME OF THE STORMS
MAY BECOME SEVERE ALONG THE MIDDLE MISSOURI RIVER VALLEY ACROSS
NEBRASKA, IOWA AND NORTHWEST MISSOURI ON TUESDAY- POSSIBLY
PRODUCING HEAVY RAINFALL AS WELL. HIGH PRESSURE ALOFT WILL ATTEMPT
TO BUILD PARTIALLY BACK INTO THE NORTHWEST BY MID-WEEK, AND
TEMPERATURES WILL RISE ONCE AGAIN AS A RESULT. BY WEDNESDAY,
TEMPERATURES ARE FORECAST TO BE 5 TO 15 DEGREES ABOVE AVERAGE
ACROSS THE PACIFIC NORTHWEST.

CAMPBELL


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