Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
000
ACUS02 KWNS 301727
SWODY2
SPC AC 301726

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1226 PM CDT SUN AUG 30 2015

VALID 311200Z - 011200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ON
MONDAY ACROSS A LARGE AREA FROM EASTERN PARTS OF THE SOUTHERN PLAINS
EASTWARD TO THE CAROLINAS AND SOUTHWARD ONTO THE FLORIDA PENINSULA.
ADDITIONAL THUNDERSTORM ACTIVITY SHOULD DEVELOP MONDAY AFTERNOON
FROM THE FOUR CORNERS REGION NORTHEASTWARD INTO THE UPPER
MISSISSIPPI VALLEY.

...SYNOPSIS...
A WEAKENING UPPER SHORT-WAVE TROUGH WILL CONTINUE SHIFTING NEWD
ACROSS THE WRN U.S. WITH TIME...AND WILL BE SHUNTED NEWD INTO
CENTRAL CANADA WITH TIME AS IT IMPINGES ON THE PERSISTENT CENTRAL
NOAM RIDGE.  THIS WILL YIELD AN OVERALL DEAMPLIFICATION OF THE FLOW
FIELD OVER THE CONUS THIS PERIOD.  MEANWHILE FARTHER S...A VERY
WEAK/ELONGATED LOW WILL LINGER OVER THE SRN PLAINS/OZARKS VICINITY.

AT THE SURFACE...A COLD FRONT ASSOCIATED WITH THE ADVANCING WRN
TROUGH WILL SHIFT ACROSS THE N CENTRAL U.S. AND WEAKEN WITH
TIME...AS THE PARENT LOW LIFTS NEWD ACROSS WRN ONTARIO AND
APPROACHES HUDSON BAY LATE.  ELSEWHERE...A WEAK/NONDESCRIPT PATTERN
WILL PREVAIL.

MAIN AREAS OF CONVECTION THIS PERIOD ARE FORECAST TO EXTEND NEWD
FROM THE SWRN CONUS ACROSS THE ROCKIES AND INTO THE N CENTRAL U.S.
-- WHERE THE WEAKENING COLD FRONT IS PROGGED TO LIE DURING THE
AFTERNOON.  SHOWERS AND STORMS WILL ALSO BE WIDESPREAD FROM THE S
CENTRAL STATES EWD/NEWD ACROSS MUCH OF THE ERN HALF OF THE U.S.
INVOF THE BROAD/WEAK UPPER LOW.  IN ALL AREAS HOWEVER...THE
BACKGROUND ENVIRONMENT APPEARS UNSUPPORTIVE OF APPRECIABLE SEVERE
RISK.

..GOSS.. 08/30/2015



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.