Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 251117
SWOMCD
SPC MCD 251117
WIZ000-ILZ000-251245-

MESOSCALE DISCUSSION 1613
NWS STORM PREDICTION CENTER NORMAN OK
0617 AM CDT MON AUG 25 2014

AREAS AFFECTED...SERN WI

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 251117Z - 251245Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...STRONG WIND GUSTS MAY PRODUCE LOCALIZED DAMAGING WINDS FOR
A FEW MORE HOURS WITH STORM CLUSTERS PROGRESSING E/NE FROM SW WI/FAR
NE IA.

DISCUSSION...MERGING CLUSTERS HAVE SUPPORTED AN INCREASE IN FORWARD
SPEED AND BULGING REFLECTIVITY STRUCTURE FROM JUNEAU TO IOWA COUNTY
WI. THIS HAS ENHANCED DOWNDRAFT MOMENTUM AND YIELDED A STRONG WIND
GUST MEASURED AT KLNR OF 44 KT. ALTHOUGH SCATTERERS ARE FEW AND FAR
BETWEEN IN DVN/MKX VWP DATA...LSE SAMPLED 50 KT WLYS FROM 3-6 KM AGL
IN THE WAKE OF THE CLUSTER. THIS SHOULD HELP MAINTAIN FORWARD
MOMENTUM AS THE LEADING EDGE OF THE CLUSTER PROGRESSES ACROSS THE
NRN PERIPHERY OF AN AIR MASS THAT HAS YET NOT BEEN OVERTURNED THIS
MORNING...CHARACTERIZED BY MIDDLE TO UPPER 70S SURFACE TEMPERATURES
AND 72-76 DEG F DEW POINTS. THIS MAY YIELD A BIT LONGER DURATION OF
STRONG GUST POTENTIAL FARTHER E TOWARDS LK MICHIGAN...COMPARED TO
THE RAPID DEMISE OF AN EARLIER CLUSTER NEAR KGRB.

..GRAMS/CORFIDI.. 08/25/2014

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GRB...LOT...MKX...DVN...ARX...

LAT...LON   43858983 44078892 44138838 43948802 43648790 43178783
            42868784 42588818 42488907 42408989 42549020 42819001
            43128987 43368973 43858983




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