Prognostic Meteorological Discussion
Issued by NWS

000
FXUS01 KWBC 282101
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
500 PM EDT MON JUL 28 2014

VALID 00Z TUE JUL 29 2014 - 00Z THU JUL 31 2014

...COOLER THAN NORMAL JULY WEATHER CONTINUES FOR MUCH OF THE
EASTERN HALF OF THE COUNTRY...

...SUMMER-TIME SHOWERS AND THUNDERSTORMS LINGER IN FLORIDA AND
NEAR THE GULF COAST...

...MONSOONAL MOISTURE WILL CONTINUE TO DELIVER SHOWERS AND
THUNDERSTORMS  ACROSS MUCH OF THE INTERIOR WESTERN U.S...

DURING THE SHORT-RANGE FORECAST PERIOD, AN UNUSUALLY BROAD AND
DEEP UPPER-LEVEL TROUGH IS EXPECTED TO REMAIN THE DOMINANT FEATURE
OVER THE EASTERN HALF OF THE COUNTRY.  THIS FEATURE WILL BRING A
NICE STRETCH OF UNUSUALLY COOL AND PLEASANT JULY WEATHER INTO THE
REGION THROUGH MID-WEEK.  THE COOLEST AIR WILL BE FOUND IN THE
UPPER GREAT LAKES WHERE TEMPERATURES ARE EXPECTED TO DROP TO NEAR
50 DEGREES BY DAYBREAK.  NEVERTHELESS, A NEW COLD FRONT WILL BRING
A REINFORCING SHOT OF COOLER AIR FROM CANADA BY WEDNESDAY,
TOGETHER WITH SCATTERED SHOWERS AND THUNDERSTORMS.  MEANWHILE, THE
TYPICAL SUMMER-TIME HEAT AND HUMIDITY WILL BE SHOVED WELL TO THE
SOUTH ALONG THE GULF COAST AND INTO FLORIDA WITH SHOWERS AND
THUNDERSTORMS LINGERING THROUGH MID-WEEK.

OUT WEST, WITH AN UPPER-LEVEL RIDGE REMAINING IN PLACE, MONSOONAL
TYPE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BE THE RULE OVER
THE INTERIOR MOUNTAINS THROUGH MID-WEEK, WHICH WILL BE ENHANCED BY
HEATING DURING LATE AFTERNOON AND EARLY EVENING HOURS.  AN
UPPER-LEVEL IMPULSE OVER THE CENTRAL/SOUTHERN ROCKIES IS FORECAST
TO TRIGGER ADDITIONAL SHOWERS AND THUNDERSTORMS AND IS EXPECTED TO
PUSH THEM OUT INTO THE CENTRAL PLAINS BY EARLY ON WEDNESDAY.  THIS
DISTURBANCE WILL ALSO INITIATE THE SOUTHWARD PROGRESSION OF A COLD
FRONT THROUGH THE SOUTHERN ROCKIES AND SOUTHERN PLAINS DURING THE
DAY ON WEDNESDAY.

ELSEWHERE, WEATHER SHOULD REMAIN DRY ALONG THE WEST COAST THROUGH
MID-WEEK.

KONG


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