Tornado, Natrona
- When
- June 26, 2:25 PM MST to 2:35 PM MST
- Where
- Natrona County, Alcova
- Rating
- F0
- Path length
- 0.2 mi
- Path width
- 20 yd
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.567, -106.717
Tornado in Wyoming, June 26, 2001
Several brief tornadoes touched down in Alcova vicinity. Path length/width and Fujita scale estimated.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS RIW wrote it up.
Several brief tornadoes touched down in Alcova vicinity. Path length/width and Fujita scale estimated.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before the first event at Jun 26, 12:00 PM MST, 2 hours 25 minutes earlier.
Area forecast discussion, Jun 26, 12:00 PM MST, 2 hours 25 minutes before
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.
In the hours before
Special weather statement, Jun 26, 9:36 AM MST, 4 hours 49 minutes before
WYZ002>005-008>015-019-020-022>028-270130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 1036 AM 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
Special weather statement, Jun 26, 11:45 AM MST, 2 hours 40 minutes before
WYZ002>005-008>015-019-020-022>028-262200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1245 PM MDT TUE JUN 26 2001 ...SEVERE WEATHER OUTLOOK... 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
Special weather statement, Jun 26, 11:45 AM MST, 2 hours 40 minutes before
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
Special weather statement, Jun 26, 1:25 PM MST, 1 hour before
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
The radar
The Riverton/Lander radar (KRIW), 154 km away, was scanning. The volume nearest the first event began at 21:25 UTC.
Event by event
1 tornado. Local standard time, as filed.
What these are
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Pennsylvania, June 26 to 30, 2001
- Heavy Rain in Washington, June 26 to 27, 2001
- Wildfire in Alaska, June 26 to 29, 2001
- Damaging Wind in Tennessee, June 26, 2001
- Damaging Winds in Kentucky, June 26, 2001
- Damaging Wind in Florida, June 26, 2001
- Tornado in Wyoming, June 26, 2001
- Flash Flooding and Hail in Montana, June 26, 2001
- Damaging Wind in Tennessee, June 26, 2001
- Hail in Texas, June 26, 2001
- Flash Flooding and Hail in Tennessee, June 26, 2001
- Damaging Wind in Louisiana, June 26, 2001
More
Every storm in Wyoming in 2001Every state in 2001This day in weather historyThe tornado archive for Wyoming, 2001Warnings in Wyoming, June 2001
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5251715.