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
776
ACUS48 KWNS 060951
SWOD48
SPC AC 060949

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0349 AM CST SAT FEB 06 2016

VALID 091200Z - 141200Z

...DISCUSSION...
THE MEDIUM RANGE MODELS BEGIN THE DAY 4 TO 8 PERIOD WITH AN
UPPER-LEVEL TROUGH OVER THE LOWER GREAT LAKES EXTENDING SWD INTO THE
SRN APPALACHIAN MTNS AND ERN GULF COAST STATES. THE MODELS MOVE A
PIECE OF THE TROUGH EWD INTO THE ATLANTIC ON TUESDAY/DAY 4 BUT
GENERALLY KEEP THE MAIN UPPER-LEVEL TROUGH IN PLACE OVER THE ERN
STATES THROUGH TUESDAY NIGHT. ON WEDNESDAY/DAY 5 AND THURSDAY/DAY
6...THE MODELS MOVE THE UPPER-LEVEL TROUGH GRADUALLY EWD AND DEVELOP
NORTHWEST MID-LEVEL FLOW FROM THE NCNTRL U.S. SEWD TO THE ATLANTIC
SEABOARD. THE NORTHWEST MID-LEVEL FLOW PATTERN PERSISTS INTO
FRIDAY/DAY 7 AND SATURDAY/DAY 8 AS A BROAD UPPER-LEVEL TROUGH TAKES
SHAPE ALONG THE ERN SEABOARD ONCE AGAIN. AT THE SFC...SEVERAL FAST
MOVING COLD FRONTS ARE FORECAST TO MOVE SEWD ACROSS THE CNTRL AND
ERN U.S. DURING THE DAY 4 TO 8 PERIOD. THIS WILL HELP REINFORCE SFC
HIGH PRESSURE ACROSS THE ERN HALF OF THE NATION LIMITING MOISTURE
RETURN OVER THE NEXT WEEK. FOR THIS REASON...CONDITIONS ARE NOT
EXPECTED TO BE FAVORABLE FOR THUNDERSTORM ACTIVITY OVER MOST OF THE
CONUS DURING THE DAY 4 TO 8 PERIOD.

..BROYLES.. 02/06/2016



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