Tornado in Wyoming, June 26, 2001

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
1 PM MDT TUE JUN 26 2001

ISOLD CNVCTN FIRING UP AT 1230 PM THIS AFTN WITH AN OTHERWISE FAIR
SKY. ETA/AVN MDLS IN AGRMNT WITH MAIN FTRS THIS RUN...BUT THE ETA
HNDLG SHORT TERM DETAILS BTR. LOW LVL CNVRGNC ZONE OVR CNTRL FCST
AREA THIS AFTN WITH SHT/WVS MOVG UP FM THE SOUTH WILL KICK OFF
CNVCTN THIS AFTN. DWPTS ARE RISING WITH LOW LVL MSTR FLUX FM THE
SE...SO THESE STRMS SHOULD HAVE SOME HEAVY SHWRS AND HAIL. THETA-E
RDG THRU THIS EVG AT H8 RUNS OVR MAINLY THE FAR E AND STRETCHES TO
THE NRN AND NE FCST AREAS. WITH THE RMNTS OF THE SRN CA UPR LOW MOVG
INTO THE SW LT TNGHT WILL KEEP TSTMS GOING ALL NIGHT. WITH A SFC
LOW DVLPG OVR SW WY THIS AFTN THEN INTO CNTRL WY BY THIS EVG XCPT
INCRS SW WNDS BHND THE LOW ESPCLY ON WED AS THE LOW REACHS THE XTRM
N-NE BY 12Z. MAIN CHG TO FCST WILL BE TO BUMP UP POPS INTO HIGH SCT
RNG FOR THIS EVG. FOR WED THE UPR RDG STARTS BLDG FM THE SW AND WILL
GO WITH ONLY ISOLD SHWRS OVR THE CNTRL-SW WITH SCT TSTMS OVR THE
N-NE-E AND SCT SHWRS NW. FOR THUR THE RDG CONTS TO BLD OVR THE FCST
AREA AND WILL GO WITH ONLY ISOLD PM TSTMS HIGHER TRRN. AS FOR TMPS
WED WILL UNDERCUT GUICDANCE SM AND CONT TMPS SMLR TO TODAY OR A LTL
WARMER...AND THEN FOR THUR A FEW DEGS WARMER. XTNDD FCST ON TRAK WITH
HOT AND DRY WITH SLGHT CHC PM TSTMS MAINLY HIGHER TRRN AS RDG CONTS
TO BLD OVR THE CNTRL RCKYS. RWM

.RIW...NONE.

WYZ002>005-008>015-019-020-022>028-262200-

SEVERE WEATHER OUTLOOK...RETRANSMISSION
NATIONAL WEATHER SERVICE RIVERTON WY
1245 PM MDT TUE JUN 26 2001

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

SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY.

DISCUSSION...
INCREASING SUBTROPICAL MOISTURE FROM THE SOUTH TODAY WILL BRING
SCATTERED THUNDERSTORMS TO THE REGION LATE THIS AFTERNOON AND
EVENING. THERE IS A SLIGHT CHANCE THAT SOME OF THESE STORMS WILL
PRODUCE LARGE HAIL AND DAMAGING WINDS. THE MAIN THREAT OVER
SWEETWATER AND SUBLETTE COUNTIES WILL BE DAMAGING WINDS AS THERE
IS LITTLE CHANCE FOR LARGE HAIL.

THIS OUTLOOK IS FOR THE FOLLOWING COUNTIES IN WESTERN AND CENTRAL
WYOMING

BIG HORN
FREMONT
HOT SPRINGS
JOHNSON
NATRONA
PARK
SUBLETTE
SWEETWATER
WASHAKIE

RWM

WCJIN-WYNW-WYSW-WYNE

WYZ015-262130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
225 PM MDT TUE JUN 26 2001

...THUNDERSTORMS MOVING TOWARDS ALCOVA AND PATHFINDER RESERVOIRS IN
SOUTHERN NATRONA COUNTY...

AT 225 PM MDT...RIVERTON DOPPLER RADAR SHOWED A CLUSTER OF
THUNDERSTORMS OVER CARBON COUNTY...MOVING NORTH TOWARDS ALCOVA AND
PATHFINDER RESERVOIRS IN SOUTHERN NATRONA COUNTY. THESE THUNDERSTORMS
WILL BE AFFECTING THESE RECREATIONAL AREAS FOR THE NEXT SEVERAL
HOURS...SO BOATERS AND OTHERS NEAR THE WATER SHOULD TAKE
SHELTER AS SOON AS POSSIBLE.  FREQUENT LIGHTNING...GUSTY WINDS...
BRIEF HEAVY RAIN AND POSSIBLY HAIL WILL ACCOMPANY THESE
STORMS.

CONTINUE TO LISTEN TO THIS \STATION FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.

DN

WCJIN-WYNE

WYZ015-262310-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
425 PM MDT TUE JUN 26 2001

...STRONG THUNDERSTORMS CONTINUE OVER WESTERN NATRONA COUNTY...

AT 425 PM MDT...RIVERTON DOPPLER RADAR SHOWED A CLUSTER OF STRONG
THUNDERSTORMS OVER WESTERN NATRONA COUNTY...MOVING NORTH AT 15
TO 20 MPH.  THESE STORMS WILL BE APPROACHING HIWAY 20/26 AND
THE COMMUNITIES OF HILAND...HELLS HALF ACRE...POWDER RIVER AND
NATRONA DURING THE NEXT HOUR.  FREQUENT LIGHTNING...BRIEF
HEAVY RAIN...GUSTY WINDS AND POSSIBLY HAIL WILL ACCOMPANY
THESE STORMS.

CONTINUE TO LISTEN TO THIS STATION FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.

DN

WCJIN-WYNE

WYZ002-004-005-008-009-013-015-026>028-270000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
500 PM MDT TUE JUN 26 2001

...A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF CENTRAL AND
NORTHERN WYOMING UNTIL 1100 PM MDT...

...STRONG THUNDERSTORMS OVER CENTRAL NATRONA AND NORTHEAST FREMONT
COUNTY...

AT 455 PM MDT...RIVERTON DOPPLER RADAR SHOWED STRONG THUNDERSTORMS
OVER CENTRAL NATRONA COUNTY NEAR THE COMMUNITY OF NATRONA...AND OVER
NORTHEAST FREMONT COUNTY NEAR BOYSEN RESERVOIR.  THESE STORMS
WERE MOVING NORTH AT BETWEEN 15 AND 20 MPH.  FREQUENT LIGHTNING...
GUSTY WINDS...BRIEF HEAVY RAIN...AND HAIL MAY ACCOMPANY THESE
STORMS.

THE AIRMASS OVER CENTRAL AND NORTHERN WYOMING IS VERY MOIST AND
UNSTABLE THIS EVENING...AND THE STORMS OVER NATRONA AND NORTHEAST
FREMONT COUNTY WILL LIKELY INTENSIFY AS THEY MOVE NORTH INTO
NORTHERN WYOMING. THE COUNTIES IN THE TORNADO WATCH AREA INCLUDE
EASTERN PARK...BIG HORN...HOT SPRINGS...WASHAKIE...JOHNSON AND
NATRONA.

CONTINUE TO LISTEN TO THIS STATION FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.

DN

WCJIN-WYNW-WYNE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON, WY
520 PM MDT TUE JUN 26 2001

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

0316 PM    ALCOVA                    WY   FUNNEL CLOUD
06/26/01   NATRONA                        REPORTED BY PUBLIC

0320 PM    5 N ALCOVA                WY   FUNNEL CLOUD
06/26/01   NATRONA

0322 PM    3 N ALCOVA                WY   FUNNEL CLOUD
06/26/01   NATRONA                        REPORTED BY SPOTTERS

0324 PM    3 NW ALCOVA               WY   FUNNEL CLOUD
06/26/01   NATRONA

0325 PM    3 N ALCOVA                WY   FUNNEL CLOUD
06/26/01   NATRONA                        REPORTED BY SPOTTERS

0343 PM    13-18 WSW CASPER          WY   FUNNEL CLOUD
06/26/01   NATRONA

0345 PM    40 SW CASPER              WY   .75 INCH HAIL
06/26/01   NATRONA

MLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON, WY
623 PM MDT TUE JUN 26 2001

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

0545 PM    6 SE THERMOPOLIS          WY   WIND DAMAGE
06/26/01   HOT SPRINGS                    1"-2" TREE BRANCHES
                                          DOWN FROM WIND.
                                          ESTIMATED WIND GUST
         |                                 OF 60 MPH.

MLC