Flash Flood and Damaging Wind in Wyoming, July 10, 2001

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
230 PM MDT TUE JUL 10 2001

WV SATL LOOP SHOWS SOME DISTINCT WX FEATURES MOVG THRU THE ROCKIES
AND WRN U.S.  MODELS SEEM OK WITH THE WV MOVG N THRU THE ROCKIES.
ONE FRTHER W SEEMS TO BE POORLY HANDLED BY ETA/AVN BUT THIS FEATURE
NOT LIKELY TO BE A FACTOR IN CWA WX OUTCOME TNGT. WL USE SATL PICS
FOR FIRST PD PCPN COVRG AS CONVCTN FIRES UP. LEANING TWD SCT LWR
ELEVTNS AND LIKELY MTNS. LOW TEMPS NOT FAR FM PREV NT DUE TO HI
DEWPTS. ON WED THE FLOW IS PROGD MORE WSW IN THE 700-500MB LAYER DUE
TO CIRCULTN OVR MT. STILL PLENTY OF MSTR ARND SO WOULD EXPECT SCT
POPS MTNS AND LOW SCT POPS LWR ELVTNS. NOT MUCH CHG IN HI TEMPS FM
TDY DUE TO CLDS/PCPN. WL KEEP LOW EVE POPS IN WED NT WITH MILD LOWS.
ON THU ETA BRINGS SSW FLO BACK INTO CWA WITH AVN MORE WSW DUE POSTN
OF UPR HI IN NEW MEX VS ETA UPR HI POSTN FRTHER E. THUS ETA WETTER
THAN AVN AND WL USE PERSISTENCE AND SIDE WITH ETA. EXPECT HIGHS THURS
CLOSE TO WED. IN EXTNDD MRF/EC CLOSE TO PREV ONES. BIGGEST CHG IS THE
UPR LOW FORMATION OVER WA/OR AREA SUN NT INTO EARLY NEXT WEEK. THIS
AS ELONGATED UPR HI SETTLES INTO NM/AZ. THIS PUTS WY IN SW FLO VS SSW
FLOW. SOME DRYING HINTED FOR SAT BUT DOES HANG ON TO MSTR CENT/E CWA.
THEN IT SEEMS THINGS TRY TO DRY OUT FOR SUN/MON. WL KEEP MODRY FCST
SUN-TUE THINK UPR LO ADVANCEMENT FOR TUE TOO FAST AND WL NOT PLAY
COOLING INTO CWA TUE.

.RIW...NONE

AR@

WYZ004-008-009-102230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
331 PM MDT TUE JUL 10 2001

...STRONG THUNDERSTORMS WEST OF MEETEETSE AND GRASS CREEK...

AT 325 PM MDT...DOPPLER RADAR SHOWED A LINE OF STRONG
THUNDERSTORMS IN A LINE FROM 5 MILES WEST OF MEETEETSE TO
5 MILES SOUTHWEST OF GRASS CREEK IN THE WESTERN BIG HORN BASIN.
THESE STORMS WERE MOVING VERY SLOWLY TO THE NORTHEAST AT 3 TO 5 MPH.
THE MAIN THREAT FROM THESE STORMS WILL BE HEAVY RAINFALL WITH
POSSIBLE LOCAL FLOODING ALONG CREEKS...STREAMS AND IN LOW LYING
AREAS.

PEOPLE IN THE AFFECTED AREA SHOULD BE ALERT FOR THESE STORMS.  A
SUDDEN AND RAPID RISE ALONG CREEKS AND WASHES CAN OCCUR AT WDISTANCES
WELL AWAY FROM THE STORMS.  IF YOU OBSERVE FLOODING OR SEVERE WEATHER
CONTACT YOUR LOCAL LAW ENFORCEMENT AGENCY IMMEDIATELY.

WCJIN-WYNW
AEM

WYZ028-102245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
339 PM MDT TUE JUL 10 2001

...HEAVY RAIN AND SOME FLOODING WITH STORMS IN EASTERN JOHNSON
COUNTY...

AT 335 PM MDT...DOPPLER RADAR SHOWED CLUSTER OF STRONG
THUNDERSTORMS IN EASTERN JOHNSON COUNTY.  THESE STORMS WERE EAST OF
INTERSTATE 25 AND SOUTH OF INTERSTATE 90 EXTENDING SOUTH TO 10
MILES NORTHEAST OF SUSSEX.   THE STORMS WERE NEARLY STATIONARY AND
PRODUCING AREAS OF VERY HEAVY RAINFALL AND LOCALIZED FLOODING IN LOW
LYING AREAS.   FREQUENT LIGHTNING AND SMALL HAIL WILL ALSO BE
THREATS FROM THESE STORMS.

PEOPLE IN THE AFFECTED AREA SHOULD BE ALERT FOR THESE STORMS.  A
SUDDEN AND RAPID RIScE ALONG CREEKS AND WASHES CAN OCCUR AT DISTANCES
WELL AWAY FROM THE STORMS.  IF YOU OBSERVE FLOODING OR SEVERE WEATHER
CONTACT YOUR LOCAL LAW ENFORCEMENT AGENCY IMMEDIATELY.

WCJIN-WYNE-WYSW
AEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON, WY
454 PM MDT TUE JUL 10 2001

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

0445 PM    KIRBY                     WY   1.00 INCH HAIL
07/10/01   HOT SPRINGS                    REPORTED BY SPOTTERS

0449 PM    WINCHESTER                WY   1.00 INCH HAIL
07/10/01   WASHAKIE                       REPORTED BY SPOTTERS

0445 PM    WINCHESTER                WY   1.75 INCH HAIL
07/10/01   WASHAKIE                       REPORTED BY SPOTTERS

0435 PM    4 EAST KIRBY              WY   FUNNEL CLOUD
07/10/01   HOT SPRINGS                    REPORTED BY
OTHERI