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000
FXUS01 KWBC 292002
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
401 PM EDT FRI AUG 29 2014

VALID 00Z SAT AUG 30 2014 - 00Z MON SEP 01 2014

...HEAVY RAIN POSSIBLE FOR PORTIONS OF THE LOWER MISSISSIPPI
VALLEY AND TENNESSEE VALLEY...

LOW PRESSURE OVER THE UPPER MISSISSIPPI VALLEY WILL MOVE
NORTHEASTWARD TO SOUTHEASTERN ONTARIO BY SUNDAY.  MOISTURE FROM
THE GULF OF MEXICO WILL POOL ALONG THE ASSOCIATED FRONT AIDING IN
PRODUCING SHOWERS AND THUNDERSTORMS FROM THE UPPER/MIDDLE
MISSISSIPPI AND UPPER GREAT LAKES THAT WILL MOVE SLOWLY TO THE
LOWER GREAT LAKES/NORTHEAST BY SUNDAY.  IN ADDITION, LIGHT TO
MODERATE RAIN WILL DEVELOP OVER PARTS OF NORTHERN NEW ENGLAND ON
SUNDAY MORNING.

MEANWHILE, UPPER-LEVEL ENERGY OVER THE CENTRAL GULF COAST WILL
LIFT NORTHEASTWARD TO THE OHIO VALLEY BY SUNDAY MORNING.  MOISTURE
RICH AIR FROM THE GULF OF MEXICO WILL INVADE THE LOWER MISSISSIPPI
VALLEY AND MOVE NORTHEASTWARD TO THE OHIO VALLEY/LOWER GREAT LAKES
BY SUNDAY.  THE MOISTURE, UPPER-LEVEL ENERGY, AND UPPER-LEVEL JET
DYNAMICS WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS OVER THE
WESTERN/CENTRAL GULF COAST ON FRIDAY EVENING AND EXPAND NORTHWARD
UP THE LOWER MISSISSIPPI VALLEY WITH MODERATE RAIN BY SATURDAY
MORNING.  THE AREA OF SHOWERS AND THUNDERSTORMS, WITH MODERATE
RAIN, WILL EXTEND FROM THE OHIO VALLEY/LOWER GREAT LAKES TO PARTS
OF THE TENNESSEE VALLEY/LOWER MISSISSIPPI VALLEY BY SUNDAY
MORNING.  ADDITIONALLY, EASTERLY FLOW OFF THE ATLANTIC WILL AID IN
PRODUCING SHOWERS AND THUNDERSTORMS OVER FLORIDA AND THE SOUTHEAST
COAST THROUGH SUNDAY.

AN UPPER-LEVEL TROUGH OVER THE EASTERN PACIFIC WILL MOVE INLAND TO
THE ROCKIES BY SUNDAY.  THE ASSOCIATED FRONT WILL DEVELOP OVER THE
NORTHERN ROCKIES AND MOVE EASTWARD TO THE NORTHERN PLAINS AND
SOUTHWARD TO THE GREAT BASIN/CENTRAL ROCKIES.  SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG THE BOUNDARY ON SATURDAY MORNING
OVER THE NORTHERN ROCKIES/NORTHERN HIGH PLAINS THAT WILL MOVE TO
THE UPPER MISSISSIPPI VALLEY BY SUNDAY.  SHOWERS AND THUNDERSTORMS
CONTINUE OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES SATURDAY
EVENING INTO SUNDAY MORNING.  FURTHERMORE, SHOWERS AND
THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE CENTRAL ROCKIES ON
FRIDAY EVENING.


ZIEGENFELDER


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







000
FXUS01 KWBC 290707
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
306 AM EDT FRI AUG 29 2014

VALID 12Z FRI AUG 29 2014 - 12Z SUN AUG 31 2014

...HEAVY RAIN POSSIBLE FOR PORTIONS OF THE CENTRAL PLAINS, MIDDLE
AND UPPER MISSISSIPPI VALLEY INTO THE UPPER GREAT LAKES...

...HEAVY SHOWERS AND THUNDERSHOWERS POSSIBLE OVER PORTIONS OF THE
GULF COAST...

...AFTER A DRY AND COMFORTABLE START, WARMER AND MORE HUMID AIR
RETURNS TO THE NORTHEAST WHILE COOLER AIR FLOODS THE NORTHWEST...

A SLOW MOVING UPPER TROUGH ACCOMPANIED BY A WEAK AREA OF LOW
PRESSURE WILL LIFT SLOWLY NORTHEASTWARD FROM THE CENTRAL US TOWARD
THE GREAT LAKES. THIS SYSTEM WILL LIKELY PRODUCE AN AREA OF HEAVY
RAINFALL IN THE FORM OF SHOWERS AND THUNDERSTORMS ESPECIALLY FROM
THE UPPER MISSISSIPPI VALLEY ACROSS THE GREAT LAKES WHERE RAINFALL
TOTALS COULD EXCEED 1 TO 2 INCHES OVER THE NEXT FEW DAYS.  THIS
SYSTEM WILL WEAKEN AS IT MOVES INTO CANADA AFTER CROSSING THE
UPPER LAKES.

A SERIES OF WEAK UPPER DISTURBANCES WILL BE FOUND OVER THE WESTERN
GULF OF MEXICO AND HELP DRIVE NUMEROUS SHOWERS AND THUNDERSHOWERS
ESPECIALLY OVER THE WESTERN AND CENTRAL GULF COAST.  HERE TOO,
RAINFALL TOTALS COULD BE LOCALLY EXCESSIVE WITH EVEN THE POTENTIAL
FOR SOME LOCAL FLASH FLOODING.

ALONG THE EAST COAST, HIGH PRESSURE AND COMFORTABLY DRY WEATHER
WILL GIVE WAY TO INCREASING HUMIDITY AS THE HIGH PRESSURE AREA
MOVES OFF THE NEW ENGLAND COAST. ANOTHER MASS OF COOLER AIR WILL
MOVE INTO THE NORTH CENTRAL STATES BUT DOES NOT APPEAR TO DRIVE
APPRECIABLY SOUTHWARD BEYOND THE NORTHERN TIER OF THE MIDWEST AS
MUCH OF THE COOLER AIR REMAINS NORTH OF THE US CANADIAN BORDER.

FARTHER WEST...A SIGNIFICANT PUSH OF COOLER AIR WILL INVADE THE
NORTHWESTERN QUARTER OF THE COUNTRY  THROUGH THE WEEKEND WITH
SHOWERS ESPECIALLY LIKELY ACROSS THE HIGHER TERRAIN OF THE PACIFIC
NORTHWEST, THE GREAT BASIN AND THE NORTHERN ROCKIES.

KOCIN


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






000
FXUS01 KWBC 290707
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
306 AM EDT FRI AUG 29 2014

VALID 12Z FRI AUG 29 2014 - 12Z SUN AUG 31 2014

...HEAVY RAIN POSSIBLE FOR PORTIONS OF THE CENTRAL PLAINS, MIDDLE
AND UPPER MISSISSIPPI VALLEY INTO THE UPPER GREAT LAKES...

...HEAVY SHOWERS AND THUNDERSHOWERS POSSIBLE OVER PORTIONS OF THE
GULF COAST...

...AFTER A DRY AND COMFORTABLE START, WARMER AND MORE HUMID AIR
RETURNS TO THE NORTHEAST WHILE COOLER AIR FLOODS THE NORTHWEST...

A SLOW MOVING UPPER TROUGH ACCOMPANIED BY A WEAK AREA OF LOW
PRESSURE WILL LIFT SLOWLY NORTHEASTWARD FROM THE CENTRAL US TOWARD
THE GREAT LAKES. THIS SYSTEM WILL LIKELY PRODUCE AN AREA OF HEAVY
RAINFALL IN THE FORM OF SHOWERS AND THUNDERSTORMS ESPECIALLY FROM
THE UPPER MISSISSIPPI VALLEY ACROSS THE GREAT LAKES WHERE RAINFALL
TOTALS COULD EXCEED 1 TO 2 INCHES OVER THE NEXT FEW DAYS.  THIS
SYSTEM WILL WEAKEN AS IT MOVES INTO CANADA AFTER CROSSING THE
UPPER LAKES.

A SERIES OF WEAK UPPER DISTURBANCES WILL BE FOUND OVER THE WESTERN
GULF OF MEXICO AND HELP DRIVE NUMEROUS SHOWERS AND THUNDERSHOWERS
ESPECIALLY OVER THE WESTERN AND CENTRAL GULF COAST.  HERE TOO,
RAINFALL TOTALS COULD BE LOCALLY EXCESSIVE WITH EVEN THE POTENTIAL
FOR SOME LOCAL FLASH FLOODING.

ALONG THE EAST COAST, HIGH PRESSURE AND COMFORTABLY DRY WEATHER
WILL GIVE WAY TO INCREASING HUMIDITY AS THE HIGH PRESSURE AREA
MOVES OFF THE NEW ENGLAND COAST. ANOTHER MASS OF COOLER AIR WILL
MOVE INTO THE NORTH CENTRAL STATES BUT DOES NOT APPEAR TO DRIVE
APPRECIABLY SOUTHWARD BEYOND THE NORTHERN TIER OF THE MIDWEST AS
MUCH OF THE COOLER AIR REMAINS NORTH OF THE US CANADIAN BORDER.

FARTHER WEST...A SIGNIFICANT PUSH OF COOLER AIR WILL INVADE THE
NORTHWESTERN QUARTER OF THE COUNTRY  THROUGH THE WEEKEND WITH
SHOWERS ESPECIALLY LIKELY ACROSS THE HIGHER TERRAIN OF THE PACIFIC
NORTHWEST, THE GREAT BASIN AND THE NORTHERN ROCKIES.

KOCIN


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







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