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 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
ACUS01 KWNS 300057
SWODY1
SPC AC 300055

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0755 PM CDT FRI AUG 29 2014

VALID 300100Z - 301200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
ISOLATED TO WIDELY SCATTERED STRONG STORMS REMAIN POSSIBLE THIS
EVENING ACROSS PARTS OF WISCONSIN AND ADJACENT WESTERN UPPER
MICHIGAN.  IT ALSO APPEARS THAT SOME RISK FOR STRONG WIND GUSTS OR A
TORNADO COULD DEVELOP WITH CONVECTION ALONG LOUISIANA COASTAL AREAS
LATER TONIGHT.

...LOUISIANA COASTAL AREAS...
A SIGNIFICANT INFLUX OF TROPICAL MOISTURE /CHARACTERIZED BY
PRECIPITABLE WATER WELL IN EXCESS OF 2 INCHES/ STILL APPEARS LIKELY
OVERNIGHT ACROSS PORTIONS OF THE CENTRAL GULF COAST AND LOWER
MISSISSIPPI VALLEY.  THIS IS EXPECTED TO BE AIDED BY MODEST
STRENGTHENING OF SOUTHERLY LOWER/MID TROPOSPHERIC FLOW...UP TO
AROUND 30 KT...AS A MID-LEVEL IMPULSE OVER THE NORTHWESTERN GULF OF
MEXICO BEGINS TO MIGRATE INLAND AROUND THE WESTERN PERIPHERY OF THE
SUBTROPICAL HIGH CENTERED OVER THE SOUTH ATLANTIC COAST.  AS
LOW-LEVEL CONVERGENCE INCREASES ALONG COASTAL AREAS...IT APPEARS
POSSIBLE THAT ENLARGEMENT OF LOW-LEVEL HODOGRAPHS COULD BECOME
CONDUCIVE TO CONVECTION WITH LOW-LEVEL MESOCYCLONES CAPABLE OF
PRODUCING LOCALLY STRONG WIND GUSTS OR A TORNADO...IN THE PRESENCE
OF HIGH BOUNDARY LAYER MOISTURE CONTENT AND CONDITIONAL INSTABILITY.


...UPPER MIDWEST...
IN TERMS OF THE LINGERING PRESENCE OF MODERATELY LARGE MIXED LAYER
CAPE /ON THE ORDER OF 2000 J PER KG/ BENEATH 35 TO 50 KT
SOUTHWESTERLY MID-LEVEL FLOW...THE ENVIRONMENT APPEARS TO REMAIN AT
LEAST MARGINALLY CONDUCIVE TO SEVERE STORM DEVELOPMENT ANOTHER FEW
HOURS ACROSS PARTS OF WISCONSIN.  AS THE REMNANTS OF A MID/UPPER
CLOSED LOW CONTINUE TO ACCELERATE NORTHEAST OF THE MID MISSOURI
VALLEY...TOWARD THE UPPER GREAT LAKES REGION...CONSOLIDATING STORMS
ALONG THE WARM FRONTAL ZONE ACROSS NORTH CENTRAL/NORTHEASTERN
WISCONSIN MAY BE ACCOMPANIED BY THE RISK FOR POTENTIALLY DAMAGING
WIND GUSTS INTO LATE EVENING.  AN ADDITIONAL TORNADO ALSO MAY NOT BE
OUT OF THE QUESTION ALONG THE FRONT...PARTICULARLY WITH THE
LINGERING DISCRETE STORMS.

..KERR.. 08/30/2014



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