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
000
ACUS02 KWNS 290507
SWODY2
SPC AC 290506

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1206 AM CDT TUE JUL 29 2014

VALID 301200Z - 311200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
THUNDERSTORMS WILL PERSIST ACROSS MUCH OF OKLAHOMA...SOUTHERN KANSAS
AND NORTH TEXAS WITH PERHAPS A MARGINAL WIND OR HAIL THREAT. OTHER
DAYTIME STORMS WILL OCCUR FROM OHIO INTO WESTERN PENNSYLVANIA AND
WESTERN NEW YORK WITH SMALL TO MARGINALLY SEVERE HAIL POSSIBLE.

...SYNOPSIS...
A LARGE AREA OF CYCLONIC FLOW/COOL TEMPERATURES ALOFT WILL EXIST
ACROSS THE ERN HALF OF THE CONUS AS AN UPPER LOW REMAINS STATIONARY
ACROSS JAMES BAY...RESULTING IN A FEW STRONG DIURNAL STORMS FROM OH
INTO WRN NY.

HIGH PRESSURE WILL BE CENTERED ROUGHLY FROM THE CNTRL AND NRN
ROCKIES EWD TO THE MID-ATLANTIC STATES BUT SELY FLOW AROUND THE HIGH
WILL MAINTAIN A RELATIVELY MOIST AIR MASS INTO THE SRN PLAINS
THROUGH THE PERIOD. HERE...A STATIONARY FRONT WILL EXIST ACROSS NRN
TX...WITH AREAS OF RAIN AND STORMS PERSISTING ACROSS MUCH OF THE
REGION.

...SRN PLAINS...
THE PRESENCE OF A SLY LOW-LEVEL JET WED MORNING WILL AID CLUSTERS OF
STORMS FROM WRN KS INTO NWRN OK EARLY...AND WARM ADVECTION AROUND
850 MB WILL PERSIST THROUGH THE DAY. INSTABILITY WILL GENERALLY BE
WEAK...BUT A LOCALIZED STRONG TO SEVERE WIND GUST CANNOT BE RULED
OUT DUE TO THE ORGANIZED NATURE OF THE STORMS AS WELL AS MODESTLY
VEERING WINDS WITH HEIGHT. IN ADDITION...HEATING S OF THE BOUNDARY
INTO TX WILL STEEPEN LOW-LEVEL LAPSE RATES WHICH COULD SUPPORT
OUTFLOW WINDS ON SRN PERIPHERY OF THE CONVECTIVE SYSTEM.

...OH VALLEY INTO THE ERN GREAT LAKES...
DAYTIME HEATING WILL LEAD TO WEAK INSTABILITY ACROSS THE GREAT LAKES
REGION WITH COOL TEMPERATURES ALOFT. THE STEEPEST LAPSE RATES ALOFT
WILL STRETCH FROM OH INTO NY WITH 500 MB TEMPERATURES OF -15 TO -18
C. SCATTERED DAYTIME STORMS WILL DEVELOP AND SOME MAY CONTAIN SMALL
HAIL. SOME OF THE STRONGEST CORES MAY HAVE HAIL APPROACHING 1 INCH
DIAMETER BEFORE DWINDLING DURING THE EVENING.

..JEWELL.. 07/29/2014



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