Severe Storm Outlook Narrative (AC)
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000
ACUS48 KWNS 010859
SWOD48
SPC AC 010858

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0358 AM CDT MON JUN 01 2015

VALID 041200Z - 091200Z

...DISCUSSION...
AN AMPLIFIED LARGE-SCALE PATTERN WILL CONTINUE INTO THE
WEEKEND...HIGHLIGHTED BY A SEMI-PERSISTENT UPPER TROUGH OVER THE
WESTERN CONUS...AN AMPLIFYING UPPER RIDGE OVER THE PLAINS...WITH A
PREVALENT LONGWAVE TROUGH OVER EASTERN CANADA. FOR AT LEAST DAYS 4/5
THURSDAY/FRIDAY...MOIST UPSLOPE TRAJECTORIES IN CONJUNCTION WITH
MODESTLY STRONG SOUTHWESTERLY MID/HIGH-LEVEL WINDS SHOULD CONTINUE
TO ACCOUNT FOR AT LEAST ISOLATED SEVERE THUNDERSTORM POTENTIAL
ACROSS THE NORTHERN/CENTRAL HIGH PLAINS...AND POSSIBLY EASTWARD INTO
PORTIONS OF THE LOWER/MIDDLE MO VALLEY ALONG/AHEAD OF A SLOW
SOUTHEASTWARD-MOVING FRONT. EARLY INDICATIONS ARE THAT AT LEAST SOME
STRONG/SEVERE THUNDERSTORM POTENTIAL COULD DEVELOP EASTWARD INTO
ADDITIONAL PORTIONS OF THE OZARKS/MIDWEST/TN VALLEY REGIONS BY THE
WEEKEND AS MOISTURE INCREASES. SCENARIOS CHARACTERIZED BY MODEST
LARGER-SCALE FORCING/VERTICAL SHEAR AND UNCERTAIN MESOSCALE FACTORS
CURRENTLY PRECLUDE ANY GRAPHICALLY DEPICTED SEVERE RISK AREAS DURING
THE FORECAST PERIOD.

..GUYER.. 06/01/2015



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