SWOMCD
SPC MCD 011833
SDZ000-NEZ000-COZ000-WYZ000-012030-
MESOSCALE DISCUSSION 1396
NWS STORM PREDICTION CENTER NORMAN OK
0133 PM CDT WED JUL 01 2009
AREAS AFFECTED...ERN WY...SWRN SD...WRN NEB...N CNTRL CO
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 011833Z - 012030Z
STORMS SHOULD BECOME MORE NUMEROUS LATER THIS AFTERNOON WITH
PRIMARILY A HAIL AND GUSTY WIND THREAT...AND A WW MAY BE NEEDED.
ISOLATED SEVERE ACTIVITY HAS ALREADY DEVELOPED OVER THE BLACK HILLS
WHERE THE CAP HAS BEEN ERODED. THIS ACTIVITY MIGHT ALSO BE AIDED BY
A WEAK MID LEVEL FEATURE WHICH MOVED OUT OF WY...WITH ENHANCED MID
LEVEL CLOUDINESS AND BACKING FLOW ON RAP VWP.
A WEAK SURFACE TROUGH WILL REMAIN OVER THE HIGH PLAINS...WHILE
SURFACE WINDS VEER TO SWLY BEHIND WITH MIXING OVER WY AND MT. THIS
WILL ENHANCE CONVERGENCE LATER TODAY WHEN THE CAP WILL BE WEAKENED.
DEWPOINTS IN THE MID 50S F BENEATH RELATIVELY COOL TEMPERATURES
ALOFT AND ENOUGH DEEP LAYER SHEAR WILL RESULT IN SCATTERED SEVERE
STORMS CAPABLE OF LARGE HAIL OF 1.00-2.00 AND LOCALLY GUSTY
WINDS...ESPECIALLY IF STORMS CAN MERGE INTO A BOW OR SMALL MCS BY
EARLY EVENING.
..JEWELL.. 07/01/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ABR...LBF...UNR...BOU...CYS...
LAT...LON 40390516 41130573 42010572 43310589 43940575 44670400
44780311 44520188 44200107 43810047 42860048 41880185
41530238 41100270 40590351 40290441 40390516
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