ACUS01 KWNS 090101
SWODY1
SPC AC 090058
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0758 PM CDT SUN SEP 08 2013
VALID 090100Z - 091200Z
...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE NORTHERN PLAINS...
...NORTHERN PLAINS...
EARLY EVENING WATER VAPOR IMAGERY REFLECTS AN EASTWARD-MOVING CLOSED
LOW OVER WESTERN MT...WITH LEADING HEIGHT FALLS AND STRENGTHENING
SOUTHWESTERLY FLOW ALOFT OVERSPREADING THE NORTHERN HIGH
PLAINS/DAKOTAS. FOR ONE...RELATIVELY ISOLATED TSTMS CAPABLE OF
HAIL/WIND MAY REMAIN POSSIBLE THIS EVENING ACROSS EASTERN MT INTO
WESTERN ND...ALTHOUGH A COOLING BOUNDARY LAYER SHOULD GRADUALLY
TEMPER THE VIGOR OF STORMS IN THESE AREAS. FOR ADDITIONAL
DETAILS...REFERENCE MESOSCALE DISCUSSION 1861.
FARTHER EAST-SOUTHEAST...A RELATIVELY MORE CERTAIN/SUSTAINED SEVERE
WEATHER RISK WILL LIKELY EXIST TONIGHT FROM FAR NORTHEAST WY INTO
WESTERN/NORTHERN PORTIONS OF SD AND FAR SOUTHERN ND. STORM MERGERS
APPEAR TO BE LEADING TO UPSCALE QUASI-LINEAR DEVELOPMENT EARLY THIS
EVENING NEAR THE WY AND SD BORDER /AS OF 01Z/. A NOCTURNALLY
INCREASING/VEERING LOW LEVEL JET SHOULD LEAD TO INCREASING STORM
COVERAGE THE REMAINDER OF THE NIGHT INCLUDING POSSIBLE MCS
SUSTENANCE ACROSS AFOREMENTIONED PORTIONS OF SD/ND AND EVENTUALLY
MN. DAMAGING WINDS/SEVERE HAIL WILL REMAIN A POSSIBILITY
TONIGHT...ALTHOUGH EXISTING CLOUD COVER/BOUNDARY LAYER CINH COULD
SOMEWHAT TEMPER THE DAMAGING WIND RISK EVEN AS A
SEMI-ORGANIZED/SUSTAINED MCS OTHERWISE POTENTIALLY EVOLVES.
..GUYER.. 09/09/2013
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