Prognostic Meteorological Discussion
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000
FXUS01 KWBC 290727
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
326 AM EDT THU JUN 29 2017

VALID 12Z THU JUN 29 2017 - 12Z SAT JUL 01 2017

...SEVERE THUNDERSTORMS AND HEAVY RAIN POSSIBLE TODAY FROM THE
CENTRAL PLAINS TO THE MID-MISSISSIPPI VALLEY...

...GRADUALLY RISING TEMPERATURES FORECAST ACROSS THE WEST COAST
STATES...

AN ELONGATED FRONTAL BOUNDARY IS EXPECTED TO BRING SCATTERED TO
NUMEROUS SHOWERS AND THUNDERSTORMS FROM THE PLAINS TO THE
NORTHEAST TODAY THROUGH FRIDAY. SEVERE THUNDERSTORMS ALONG WITH
HEAVY RAIN ARE POSSIBLE TODAY FROM THE CENTRAL PLAINS TO THE
MID-MISSISSIPPI VALLEY. ON FRIDAY, THE THREAT FOR SEVERE WEATHER
WILL SHIFT A BIT SOUTHWARD AND EASTWARD, FROM THE SOUTHERN PLAINS
THROUGH THE MID-MISSISSIPPI VALLEY TO PORTIONS OF THE LOWER GREAT
LAKES AND THE NORTHEAST. FARTHER SOUTH, A WEAKENING STATIONARY
FRONTAL BOUNDARY WILL ALONG WITH A MOIST AND UNSTABLE AIR MASS
WILL PRODUCE SCATTERED TO NUMEROUS AFTERNOON AND EVENING SHOWERS
AND THUNDERSTORMS ACROSS MUCH OF THE GULF COAST AND THE SOUTHEAST.
SHOWERS AND THUNDERSTORMS SHOULD BECOME MORE NUMEROUS ACROSS THE
SOUTHEAST FRIDAY NIGHT INTO SATURDAY AS MOISTURE AND INSTABILITY
MOVE FARTHER NORTH AHEAD OF THE INCOMING COLD FRONT.

ACROSS THE WESTERN U.S., GENERALLY DRY CONDITIONS WILL PREVAIL
THROUGH THE NEXT COUPLE DAYS. A BUILDING UPPER-LEVEL RIDGE WILL
SUPPORT RISING TEMPERATURES ACROSS THE WEST COAST STATES. HIGH
TEMPERATURES ARE FORECAST TO BE 5 TO 10 DEGREES ABOVE AVERAGE FROM
CALIFORNIA TO WASHINGTON. BY FRIDAY, HIGHS ACROSS THESE SAME AREAS
WILL WARM FURTHER WITH SOME AREAS REACHING 15 DEGREES ABOVE
AVERAGE, PARTICULARLY IN THE PACIFIC NORTHWEST, WHERE SOME AREAS
WILL RISE INTO THE 90S.

RYAN


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





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