Severe Storm Outlook Narrative (AC)
Issued by NWS

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ACUS01 KWNS 221236
SWODY1
SPC AC 221234

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0734 AM CDT WED OCT 22 2014

VALID 221300Z - 231200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
ISOLATED TO WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED TODAY FROM
PARTS OF THE CENTRAL AND SOUTHERN ROCKIES INTO THE GREAT PLAINS AND
UPPER MISSISSIPPI VALLEY. OTHER THUNDERSTORMS ARE POSSIBLE ACROSS
THE COASTAL NORTHEAST...PACIFIC NORTHWEST...SOUTH FLORIDA...AND FAR
SOUTHERN TEXAS.

...SYNOPSIS...

A DEEP-LAYER CYCLONE ALONG THE MID ATLANTIC COAST WILL SLOWLY DRIFT
NEWD IN RESPONSE TO THE APPROACH OF AN UPSTREAM SHORT-WAVE TROUGH
TRANSLATING ACROSS THE GREAT PLAINS. FARTHER W...A BELT OF STRONG
MID AND UPPER-LEVEL FLOW WILL DEVELOP INLAND FROM THE PACIFIC NW
COAST IN ASSOCIATION WITH A LONG-WAVE TROUGH ANCHORED OVER THE FAR
NERN PACIFIC.

AT THE SURFACE...AN AREA OF LOW PRESSURE WILL DEVELOP EWD ACROSS
SASKATCHEWAN AND MANITOBA WHILE A TRAILING COLD FRONT ADVANCES
THROUGH THE NRN PLAINS INTO UPPER MS VALLEY. THE TRAILING EXTENSION
OF THIS FRONT WILL GRADUALLY WEAKEN OVER THE CNTRL HIGH PLAINS.

...CNTRL/SRN ROCKIES INTO THE GREAT PLAINS AND UPPER MS VALLEY...

A GRADUAL INCREASE IN NON-SEVERE TSTM COVERAGE IS ANTICIPATED TODAY
FROM SWRN TX INTO THE MID MO VALLEY ALONG THE WARM-CONVEYOR AIR
STREAM PRECEDING THE COLD FRONT AND MID-LEVEL TROUGH. OTHER
DIURNALLY ENHANCED STORMS WILL BE POSSIBLE ALONG FAVORED TERRAIN OF
THE CNTRL AND SRN ROCKIES. TSTM COVERAGE SHOULD BEGIN TO DECREASE BY
MID TO LATE EVENING WITH THE ONSET OF NOCTURNAL COOLING OF THE
BOUNDARY LAYER.

...MID ATLANTIC COAST INTO NEW ENGLAND...

NUMEROUS SHOWERS AND TSTMS /MOST OF WHICH ARE OFFSHORE/ ARE ONGOING
THIS MORNING WITHIN A CONVECTIVE BAND ENCOMPASSING THE DEEP-LAYER
LOW. THE INTERACTION OF STRONG DYNAMIC FORCING FOR ASCENT WITH
SENSIBLE HEAT AND MOISTURE FLUXES WITHIN THE OCEANIC BOUNDARY LAYER
SHOULD PROMOTE CONTINUED DEEP CONVECTION WHICH WILL EVENTUALLY PIVOT
NWD INTO SRN NEW ENGLAND. WHILE A COUPLE STRONG STORMS COULD BRUSH
THE COASTS OF LONG ISLAND AND FAR SERN MA...NO SEVERE WEATHER IS
ANTICIPATED.

...ELSEWHERE...

A FEW TSTMS WILL BE POSSIBLE ACROSS SRN PORTIONS OF TX AND FL AS
WELL AS ALONG THE PACIFIC NW COAST.

..MEAD/LEITMAN.. 10/22/2014




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