Hail in Wyoming, July 23, 2002

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
124 PM MDT TUE JUL 23 2002

UPPER LEVEL SW FLOW OVER THE CWFA THIS AFTERNOON WITH SHORT WAVE
CURRENTLY MOVING ACROSS WESTERN ID. ALSO...60 TO 70 KT 300 MB JET
STREAK FROM NORTHERN CA INTO NORTHWEST NV. TSTMS DEVELOPING ACROSS
NORTHWEST WY AND ANOTHER AREA OF STORMS ACROSS NORTHEAST UT...JUST
SOUTH OF SWEETWATER CO. BEST SFC INSTABILITY ACROSS THE BIG HORN
BASIN WITH CAPES OF 1600 TO 1800 J/KG.

THIS EVENING WILL PROBABLY WILL BE BUSY LIKE THE PREVIOUS TWO
NIGHTS WITH A FEW SEVERE STORMS POSSIBLE. THE COMBINATION OF
INSTABILITY AN INCREASING DYNAMICS WILL BE THE MAIN PLAYERS.
STORMS WILL PROBABLY ORGANIZE INTO AN MCS LATER TONIGHT TO OUR NORTH
AND EAST. LOOKS LIKE WED WILL BE A BREAK DAY WITH UPPER RIDGE
SLOWLY BUILDING AND WARMER 700 MB TEMPS AND DRIER AIR WORKING INTO
THE CWFA. TEMPS WILL BE WARM ON WED WITH HIGHS BACK INTO THE MID
90S ACROSS THE EASTERN CWFA. NEXT SHORT WAVE TO MOVE ACROSS
WY ON THU SO WILL GO WITH CHC POPS ACROSS THE AREA ON THU.

WILL GO WITH CHC POPS FOR FRI THROUGH SUN AS MOIST MONSOON FLOW
CONTINUES...THEN DRY WX FOR MON AND TUE AS A DRIER WESTERLY FLOW
DEVELOPS.

.RIW...NONE.
MC

WYZ001>010-012-013-015-026>028-240000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1102 AM MDT TUE JUL 23 2002

THE SEVERE WEATHER RISK IN WESTERN AND CENTRAL WYOMING WILL BE
SLIGHT THIS AFTERNOON AND EVENING.

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND EVENING.

DISCUSSION...A MOIST AN UNSTABLE AIRMASS WAS ALREADY IN PLACE ACROSS
THE AREA THIS MORNING. AFTERNOON HEATING WILL MAKE THE AIRMASS EVEN
MORE UNSTABLE...ALONG WITH AN UPPER LEVEL DISTURBANCE MOVING ACROSS
NORTHERN WYOMING. AS A RESULT...SCATTERED THUNDERSTORMS WILL DEVELOP
THIS AFTERNOON. A FEW STORMS MAY BECOME SEVERE AND PRODUCE LARGE
HAIL AND DAMAGING WINDS. SOME STORMS ON MONDAY PRODUCED BETWEEN ONE
AND TWO INCHES OF RAINFALL AND WIND GUSTS IN EXCESS OF 50 MPH ACROSS
PARTS OF FREMONT COUNTY. RAINFALL AMOUNTS OVER ONE INCH ARE POSSIBLE
WITH SOME STORMS THIS AFTERNOON AND EVENING.

THIS OUTLOOK INCLUDES THE FOLLOWING COUNTIES IN WESTERN AND CENTRAL
WYOMING.
PARK  TETON  BIG HORN  JOHNSON  WASHAKIE  HOT SPRINGS  FREMONT
NATRONA

WYZ001>010-012-013-015-026>028-240000-

SEVERE WEATHER OUTLOOK...CORRECTION
NATIONAL WEATHER SERVICE RIVERTON WY
1102 AM MDT TUE JUL 23 2002

THE SEVERE WEATHER RISK IN WESTERN AND CENTRAL WYOMING WILL BE
SLIGHT THIS AFTERNOON AND EVENING.

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND EVENING.

DISCUSSION...A MOIST AN UNSTABLE AIRMASS WAS ALREADY IN PLACE ACROSS
THE AREA THIS MORNING. AFTERNOON HEATING WILL MAKE THE AIRMASS EVEN
MORE UNSTABLE...ALONG WITH AN UPPER LEVEL DISTURBANCE MOVING ACROSS
NORTHERN WYOMING. AS A RESULT...SCATTERED THUNDERSTORMS WILL DEVELOP
THIS AFTERNOON. A FEW STORMS MAY BECOME SEVERE AND PRODUCE LARGE
HAIL AND DAMAGING WINDS. SOME STORMS ON MONDAY PRODUCED BETWEEN ONE
AND TWO INCHES OF RAINFALL AND WIND GUSTS IN EXCESS OF 50 MPH ACROSS
PARTS OF FREMONT COUNTY. RAINFALL AMOUNTS OVER ONE INCH ARE POSSIBLE
WITH SOME STORMS THIS AFTERNOON AND EVENING.

THIS OUTLOOK INCLUDES THE FOLLOWING COUNTIES IN WESTERN AND CENTRAL
WYOMING.
PARK  TETON  BIG HORN  JOHNSON  WASHAKIE  HOT SPRINGS  FREMONT
NATRONA

WCJIN-WYNW-WYNE

MC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON, WY
110 PM MDT TUE JUL 23 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0410 PM    4 W GRASS CREEK           WY   .88 INCH HAIL
07/21/02   HOT SPRINGS                    REPORTED BY SPOTTERS.
                                          PEA TO NICKEL HAIL
                                          LASTED UNTIL 440 PM.

0610 PM    8 NNW RIVERTON            WY   .75 INCH HAIL
07/21/02   FREMONT                        REPORTED BY SPOTTERS

0533 PM    PAVILLION                 WY   .75 INCH HAIL
07/21/02   FREMONT                        REPORTED BY SPOTTERS

ESTELL