Severe Storm Outlook Narrative (AC)
Issued by NWS

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ACUS48 KWNS 270833
SWOD48
SPC AC 270832

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0332 AM CDT FRI MAR 27 2015

VALID 301200Z - 041200Z

...DISCUSSION...
AFTER A LULL IN EXPECTED SEVERE STORMS...POTENTIAL WILL LIKELY
INCREASE BEGINNING ABOUT D5/TUE AS BOUNDARY LAYER MOISTURE CONTENT
CONTINUES TO SLOWLY ACCUMULATE OVER THE GULF AND ADJACENT STATES.
ALTHOUGH DIFFERENCES BECOME INCREASINGLY PRONOUNCED WITH
TIME...CONSENSUS OF GUIDANCE OFFERS A FEW SHORTWAVE TROUGHS OF
CONVECTIVE INTEREST. A WEAK SRN-STREAM IMPULSE SHOULD APPROACH THE
LOWER RIO GRANDE VALLEY AROUND D5/TUE. FLOW FIELDS ARE NOT PROGGED
TO BE STRONG...ALTHOUGH THE ECMWF DOES INDICATE SOME POTENTIAL FOR
SMALL-SCALE AMPLIFICATION TOWARDS THE LOWER MS VALLEY AROUND D6-7.
IN THE NRN STREAM...A SHORTWAVE TROUGH IS FORECAST TO CROSS THE
UPPER MIDWEST AROUND D6/WED WITH AN UPSTREAM TROUGH INTO THE WRN
STATES AROUND D8/FRI. ALL OF THESE FEATURES MIGHT SUPPORT POCKETS OF
ORGANIZED SEVERE STORMS...BUT LOW PREDICTABILITY SUGGESTS
DELINEATING SPECIFIC SPATIOTEMPORAL DETAILS IS PREMATURE.

..GRAMS.. 03/27/2015


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