

133 

WWUS20 KWNS 192243

SEL9

SPC WW 192243

MNZ000-NDZ000-200400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 399

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CDT TUE JUL 19 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST MINNESOTA

  NORTH CENTRAL AND NORTHEAST NORTH DAKOTA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 545 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...AN ISOLATED SUPERCELL NOW IN NORTHEAST NORTH DAKOTA WILL

LIKELY PERSIST WHILE MOVING TO THE SOUTH-SOUTHEAST THIS EVENING.

OTHER STORM DEVELOPMENT IS BEGINNING TO THE WEST OF THIS INITIAL

SUPERCELL...AND IT APPEARS PROBABLE THAT THE ADDITIONAL STORMS WILL

LEAD TO THE DEVELOPMENT OF A CLUSTER OF STORMS.  ISOLATED VERY LARGE

HAIL AND A TORNADO WILL BE POSSIBLE WITH THE INITIAL

SUPERCELL...WHILE THE DAMAGING WIND RISK WILL INCREASE SOME AS

STORMS MERGE THROUGH THE EVENING.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH

NORTHEAST OF DEVILS LAKE NORTH DAKOTA TO 40 MILES SOUTH SOUTHWEST

OF GRAND FORKS NORTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 397...WW 398...



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 31020.





...THOMPSON

