

676 

WWUS20 KWNS 032036

SEL4

SPC WW 032036

COZ000-WYZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 464

NWS STORM PREDICTION CENTER NORMAN OK

235 PM MDT SAT AUG 3 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  THE NORTHEAST QUARTER OF COLORADO

  PARTS OF SOUTHEAST WYOMING



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  A FEW TORNADOES POSSIBLE

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 65 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHEAST OF

FORT COLLINS COLORADO TO 35 MILES SOUTH OF LIMON COLORADO.  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 463...



DISCUSSION...THUNDERSTORMS CONTINUE DEVELOPING ACROSS NORTHEAST

COLORADO AND INTO ADJACENT SOUTHEAST WYOMING THIS AFTERNOON...WITHIN

A MOIST LOW-LEVEL AIRMASS WHICH IS SUPPORTING MODERATE INSTABILITY.

STORMS SHOULD CONTINUE TO INCREASE IN COVERAGE THIS AFTERNOON --

LIKELY EVENTUALLY GROWING UPSCALE INTO AN MCS WITH TIME.  UNTIL

THEN...MORE ISOLATED MULTICELL/SUPERCELL STORMS WILL PERSIST...WITH

THREATS FOR LARGE HAIL AND DAMAGING WINDS PREVAILING.  AN ISOLATED

TORNADO THREAT ALSO EXISTS -- PARTICULARLY ACROSS THE

MORGAN/WASHINGTON COUNTY VICINITY OF NORTHEAST COLORADO NEAR THE

WELL-DEFINED SURFACE BOUNDARY CURRENTLY LYING ACROSS THIS AREA.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 55 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 27015.





...GOSS

