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
000
ACUS48 KWNS 240847
SWOD48
SPC AC 240846

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0346 AM CDT SUN MAY 24 2015

VALID 271200Z - 011200Z

...DISCUSSION...
MODESTLY STRONG/CYCLONIC UPPER-LEVEL WESTERLIES WILL BE PREVALENT
INTO LATE WEEK PARTICULARLY FROM THE ROCKIES TO THE APPALACHIANS.
THIS WILL INCLUDE A TROUGH THAT IS EXPECTED TO GRADUALLY AMPLIFY
OVER THE NORTHERN/CENTRAL ROCKIES ON DAYS 4-5 WEDNESDAY/THURSDAY AND
SUBSEQUENTLY SPREAD EAST-NORTHEASTWARD OVER THE SOUTH-CENTRAL
PLAINS/UPPER MIDWEST THROUGH DAYS 6/7 FRIDAY/SATURDAY. AHEAD OF THIS
UPPER TROUGH...AN INCREASINGLY MOIST AIR MASS WILL SPREAD NORTHWARD
INTO THE LOWER/MIDDLE MO VALLEY AND MIDWEST INTO DAYS 5/6
THURSDAY/FRIDAY. GUIDANCE VARIABILITY/LIMITED PREDICTABILITY AND AN
ABSENCE OF MORE READILY DISCERNIBLE LARGER-SCALE MECHANISMS
PRECLUDES A DELINEATION OF 15+ PERCENT SEVERE PROBABILITIES AT THIS
TIME.

HOWEVER...ON DAY 4/WEDNESDAY IT APPEARS THAT SOME STRONG TO SEVERE
THUNDERSTORMS WILL BE POSSIBLE ACROSS PORTIONS OF THE NORTHEAST
STATES/CENTRAL APPALACHIANS VICINITY AND POTENTIALLY THE TN
VALLEY...IN ADDITION TO AREAS SUCH AS THE CENTRAL HIGH PLAINS. BY
DAYS 5/6 FRIDAY/SATURDAY...SEVERE POTENTIAL MAY CONTINUE ACROSS THE
CENTRAL HIGH PLAINS VICINITY WHILE ALSO DEVELOPING INTO PARTS OF THE
UPPER MIDWEST AHEAD OF A FRONT.

..GUYER.. 05/24/2015



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