Severe Storm Outlook Narrative (AC)
Issued by NWS

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000
ACUS11 KWNS 282254
SWOMCD
SPC MCD 282254
ORZ000-WAZ000-290100-

MESOSCALE DISCUSSION 1223
NWS STORM PREDICTION CENTER NORMAN OK
0554 PM CDT SUN JUN 28 2015

AREAS AFFECTED...CNTRL/ERN ORE

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 282254Z - 290100Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...LOCALIZED SEVERE WIND GUSTS AND MARGINALLY SEVERE HAIL
MIGHT ACCOMPANY ISOLATED TSTMS EVOLVING N FROM S-CNTRL/SERN ORE
THROUGH ABOUT 03Z.

DISCUSSION...ISOLATED TSTMS HAVE DEVELOPED ACROSS PARTS OF LAKE AND
HARNEY COUNTIES LIKELY AIDED BY WEAK MID-LEVEL HEIGHT FALLS
DOWNSTREAM OF A SHORTWAVE TROUGH JUST OFF THE NRN CA COAST. THIS
CORRIDOR IS PROBABLY ON THE PERIPHERY OF MODERATE AND UNIDIRECTIONAL
MID/UPPER-LEVEL SLYS BASED ON EXTRAPOLATED RGX VWP DATA AND GIVEN
THE HEIGHT GRADIENT BETWEEN THE TROUGH AND STOUT ANTICYCLONE
ANCHORED OVER THE ERN GREAT BASIN. THESE TSTMS SHOULD PROGRESS NWD
TOWARDS THE COLUMBIA RIVER INTO EARLY EVENING PRIOR TO INCREASING
MLCIN. WITHIN A VERY DEEPLY MIXED AIR MASS CHARACTERIZED BY SURFACE
DEW POINT DEPRESSIONS OF 40-60 DEG F AND GPS PW VALUES OF 1-1.25
IN...ISOLATED SEVERE WIND GUSTS AND PERHAPS MARGINALLY SEVERE HAIL
MAY OCCUR.

..GRAMS/CORFIDI.. 06/28/2015

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

ATTN...WFO...BOI...PDT...MFR...

LAT...LON   44002122 44842135 45492113 45752084 45912051 45981992
            45871931 45571906 44011876 43041869 42701878 42451895
            42421963 43532058 44002122



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