

966 

WWUS20 KWNS 212021

SEL4

SPC WW 212021

MTZ000-NDZ000-SDZ000-220400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 324

NWS STORM PREDICTION CENTER NORMAN OK

220 PM MDT SUN JUN 21 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  EASTERN MONTANA

  WESTERN AND CENTRAL NORTH DAKOTA

  NORTHERN SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



SUMMARY...SUPERCELL STORMS ERUPTING ACROSS EASTERN MT AT PRESENT

WILL CONTINUE TO INCREASE IN COVERAGE AND INTENSITY AS LARGE SCALE

ASCENT SPREADS EAST FROM THE NORTHERN ROCKIES AND AIDS LEE-SIDE

CYCLONE DEVELOPMENT. STORMS MAY EVENTUALLY CONGEAL INTO A MORE

EXTENSIVE BOW ECHO ACROSS THE DAKOTAS THROUGH LATE EVENING WHERE

DAMAGING WINDS AND LARGE HAIL WILL LIKELY CONTINUE AFTER DARK.

TORNADO POTENTIAL EXISTS IN THE INITIAL AND TRANSITORY STAGES

...ESPECIALLY ACROSS THE INSTABILITY AXIS OVER WESTERN NORTH

DAKOTA...GIVEN STRENGTHENING LOW AND DEEP-LAYER SHEAR IN THE

PRESENCE OF HIGHER BOUNDARY LAYER RH.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 165 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHWEST OF MINOT

NORTH DAKOTA TO 35 MILES WEST SOUTHWEST OF LEMMON SOUTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 322...WW 323...



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 28035.





...CARBIN



608 

WWUS20 KWNS 212021

SEL4

SPC WW 212021

MTZ000-NDZ000-SDZ000-220400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 324

NWS STORM PREDICTION CENTER NORMAN OK

220 PM MDT SUN JUN 21 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  EASTERN MONTANA

  WESTERN AND CENTRAL NORTH DAKOTA

  NORTHERN SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



SUMMARY...SUPERCELL STORMS ERUPTING ACROSS EASTERN MT AT PRESENT

WILL CONTINUE TO INCREASE IN COVERAGE AND INTENSITY AS LARGE SCALE

ASCENT SPREADS EAST FROM THE NORTHERN ROCKIES AND AIDS LEE-SIDE

CYCLONE DEVELOPMENT. STORMS MAY EVENTUALLY CONGEAL INTO A MORE

EXTENSIVE BOW ECHO ACROSS THE DAKOTAS THROUGH LATE EVENING WHERE

DAMAGING WINDS AND LARGE HAIL WILL LIKELY CONTINUE AFTER DARK.

TORNADO POTENTIAL EXISTS IN THE INITIAL AND TRANSITORY STAGES

...ESPECIALLY ACROSS THE INSTABILITY AXIS OVER WESTERN NORTH

DAKOTA...GIVEN STRENGTHENING LOW AND DEEP-LAYER SHEAR IN THE

PRESENCE OF HIGHER BOUNDARY LAYER RH.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 165 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHWEST OF MINOT

NORTH DAKOTA TO 35 MILES WEST SOUTHWEST OF LEMMON SOUTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 322...WW 323...



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 28035.





...CARBIN

