Prognostic Meteorological Discussion
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000
FXUS01 KWBC 121835
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
235 PM EDT SAT JUL 12 2014

VALID 00Z SUN JUL 13 2014 - 00Z TUE JUL 15 2014

...HEAVY RAIN AND SEVERE WEATHER POSSIBLE FROM THE FRONT RANGE
EASTWARD TO THE OHIO VALLEY...

...HEAT TO CONTINUE IN THE PACIFIC NORTHWEST...

...MUCH COOLER AIR TO PLUNGE SOUTHWARD THROUGH THE PLAINS AND
GREAT LAKES REGION TOMORROW AND MONDAY...

A VERY ACTIVE WEATHER PATTERN IS IN STORE FOR THE US OVER THE NEXT
FEW DAYS. A FRONTAL BOUNDARY DRAPED ACROSS THE CENTRAL PLAINS AS
WELL AS THROUGH THE UPPER MIDWEST WILL MOVE EASTWARD TONIGHT AND
INTO SUNDAY. SHOWERS AND THUNDERSTORMS ALONG AND AHEAD OF THE
BOUNDARY WILL WORK THROUGH THE GREAT LAKES REGION WITH LOCALLY
HEAVY RAINFALL POSSIBLE. SEE THE LATEST WPC EXCESSIVE RAINFALL
DISCUSSION (QPFERD) AND SPC CONVECTIVE OUTLOOK FOR MORE
INFORMATION. THE WEST WILL REMAIN HOT WITH WELL ABOVE NORMAL
TEMPERATURES CONTINUING IN WASHINGTON, OREGON, AND IDAHO -- ABOVE
100F -- BUT THE SOUTHWEST SHOULD REMAIN QUITE SUMMERY AS WELL.
ALONG AND EAST OF THE CENTRAL ROCKIES (AND INCLUDING MUCH OF
ARIZONA), MONSOONAL MOISTURE WILL AGAIN HELP FIRE OFF MAINLY
AFTERNOON SHOWERS AND THUNDERSTORMS WHICH COULD PRODUCE HEAVY
RAINFALL ESPECIALLY OVER SOUTHEASTERN COLORADO.

TO THE NORTH, A CANADIAN COLD FRONT WILL PLUNGE SOUTHWARD THROUGH
THE DAKOTAS AND MINNESOTA TONIGHT, BRINGING IN MUCH COOLER THAN
NORMAL TEMPERATURES. DAYTIME TEMPERATURES WILL BE ABOUT 10-20
DEGREES F COOLER THAN AVERAGE SUNDAY AND ESPECIALLY MONDAY. THIS
COLD FRONT WILL BECOME THE DOMINANT WEATHER MAKER FOR MUCH OF THE
CENTRAL/EASTERN STATES EARLY NEXT WEEK. WITH A TYPICAL HOT AND
HUMID SUMMERTIME AIRMASS AHEAD OF A MORE SPRING OR FALL-LIKE
AIRMASS BEHIND THE FRONT, SEVERE WEATHER WILL BE POSSIBLE SUNDAY
INTO MONDAY FROM THE OHIO VALLEY EASTWARD INTO THE MID-ATLANTIC
STATES.

FRACASSO


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




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