Sheridan, WY...Dickinson, ND...Williston, ND...Miles City, MT...Glendive, MT...
Probabilistic Tornado Graphic
Probability of a tornado within 25 miles of a point. Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Damaging Wind Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
5 %
68,083
202,481
Sheridan, WY...Dickinson, ND...Williston, ND...Miles City, MT...Glendive, MT...
Probabilistic Large Hail Graphic
Probability of hail 1" or larger within 25 miles of a point. Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
SPC AC 281936
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0236 PM CDT SAT MAR 28 2015
VALID 282000Z - 291200Z
...THERE IS A MRGL RISK OF SVR TSTMS OVER PARTS OF EASTERN MT INTO
THE WESTERN DAKOTAS...
...SUMMARY...
ISOLATED THUNDERSTORMS WILL BE POSSIBLE FROM PARTS OF MONTANA AND
WYOMING INTO THE NORTHERN GREAT PLAINS THIS AFTERNOON THROUGH
TONIGHT. A FEW OF THE STORMS COULD PRODUCE DAMAGING WIND GUSTS.
...20Z UPDATE TO THE DAY-1 CONVECTIVE OUTLOOK...
THE WRN BOUND OF THE MARGINAL AREA HAS BEEN SHIFTED WWD ACROSS
PORTIONS OF MT. FOR ADDITIONAL INFORMATION REGARDING THE RISK OF
ISOLATED DMGG WIND GUSTS ACROSS THE MARGINAL AREA...PLEASE REFER TO
RECENTLY ISSUED MESOSCALE DISCUSSION 155.
..COHEN.. 03/28/2015
.PREV DISCUSSION... /ISSUED 1122 AM CDT SAT MAR 28 2015/
...MT/WY/SD/ND...
WATER VAPOR LOOPS SHOW A PROGRESSIVE SHORTWAVE TROUGH MOVING INTO
WESTERN MT. THIS AREA OF LARGE SCALE LIFT ASSOCIATED WITH THIS
FEATURE WILL MOVE EASTWARD INTO EASTERN MT BY MID AFTERNOON.
FORECAST SOUNDINGS IN THIS REGION SHOW STEEP LOW/MID LEVEL LAPSE
RATES...FAST TROPOSPHERIC WINDS...AND SUFFICIENT LOW/MID LEVEL
MOISTURE FOR THE DEVELOPMENT OF SCATTERED FAST-MOVING SHOWERS AND
THUNDERSTORMS. A FEW OF THESE STORMS OVER EASTERN MT AND THE
WESTERN DAKOTAS WILL POSE A RISK OF LOCALLY GUSTY/DAMAGING WINDS.
ELSEWHERE...NO SEVERE STORMS ARE EXPECTED TODAY.
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z
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