Alert archive / Wyoming / Tornado Warnings in 2001
Tornado Warning 1, NWS Riverton, WY
NWS Riverton, WY issued this tornado warning at Jun 26, 2001, 3:25 PM MDT for Natrona County, Wyoming. It was in force for 35 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 26, 2001, 3:25 PM MDT (21:25 UTC)
- Expired
- Jun 26, 2001, 4:00 PM MDT
- In force
- 35 min
- Issued by
- NWS Riverton, WY
- Area
- Whole counties
County Natrona County, WY
The radar
The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 21:25 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 26, 3:25 PM MDT | Tornado F0 | Alcova, WY | |
| Jun 26, 3:45 PM MDT | Hail 0.75 | Casper, WY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.4 hours before the alert went out and 131 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1851 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KRIW 262127 TORRIW WYC025-262200- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE RIVERTON WY 325 PM MDT TUE JUN 26 2001 THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A * TORNADO WARNING FOR... SOUTH CENTRAL NATRONA COUNTY IN EAST CENTRAL WYOMING * UNTIL 400 PM MDT * AT 325 PM MDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM 4 MILES WEST OF ALCOVA...OR ABOUT 30 MILES SOUTHWEST OF CASPER. SEVERAL FUNNEL CLOUDS HAVE BEEN REPORTED WITH THIS SEVERE THUNDERSTORM...WITH BRIEF TOUCHDOWNS NORTH OF ALCOVA RESERVOIR. DOPPLER RADAR INDICATED THE ASSOCIATED STORM MOVING NORTH AT 20 MPH. * THE TORNADO IS EXPECTED TO BE... NEAR ALCOVA AROUND 330 PM MDT THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE. OTHERWISE... GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. AVOID WINDOWS AND DOORS. ABANDON CARS AND MOBILE HOMES FOR A STURDIER BUILDING OR GET INTO A DITCH OR CULVERT. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN RIVERTON. $$ LAT...LON 4260 10690 4247 10673 4272 10635 4288 10657 NOLL WCJIN-WYNE
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 3:03 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 57 min |
| Jun 26, 5:11 PM MDT | Severe Thunderstorm Warning | RIW | Fremont, Hot Springs | 49 min |
Nearby
Tornado Warnings in Wyoming, 2001Every tornado warning in 2001Tornadoes in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.