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
000
ACUS48 KWNS 210830
SWOD48
SPC AC 210829

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0329 AM CDT THU AUG 21 2014

VALID 241200Z - 291200Z

...DISCUSSION...
MEDIUM RANGE GUIDANCE HAS SHOWN VERY LITTLE CONSISTENCY OVER THE
LAST DAY OR TWO. AT PRESENT...THE GFS SUGGESTS A MORE PROGRESSIVE
UPPER PATTERN...BRINGING A TROUGH OVER THE INTERMOUNTAIN WEST EWD
ACROSS THE PLAINS AND INTO THE GREAT LAKES BY THE END OF THE PERIOD.
MEANWHILE...THE ECMWF MAINTAINS MORE OF A BLOCKING PATTERN WITH THE
EASTERN UPPER RIDGE...AND BUILDS THE SUBTROPICAL HIGH WESTWARD
TOWARD THE SOUTHERN PLAINS. ADDITIONALLY...SFC FEATURES AT THE
BEGINNING OF THE PERIOD DIFFER BY AT LEAST A COUPLE HUNDRED MILES.
GIVEN A GREAT DEAL OF UNCERTAINTY AND THE LACK OF
CONSISTENCY...CONFIDENCE IS LOW REGARDING SEVERE POTENTIAL DURING
THE DAY 4-8 PERIOD.

..LEITMAN.. 08/21/2014



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