Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 20, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jun 14, 1997, 2:15 PM MDT for Johnson County, Wyoming. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1997, 2:15 PM MDT (20:15 UTC)
- Expired
- Jun 14, 1997, 3:00 PM MDT
- In force
- 45 min
- Issued by
- NWS Riverton, WY
- Area
- Whole counties
County Johnson County, WY
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 8.3 hours before the alert went out and 182 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
- 1028 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jun 14, 3:00 AM MDT, 11 hours 15 minutes earlier.
Area forecast discussion, Jun 14, 3:00 AM MDT, 11 hours 15 minutes before
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</html>In the hours before
Special weather statement, Jun 14, 1:06 PM MDT, 1 hour 9 minutes before
WYZ014-018-020-022>025-142110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 106 PM MDT SAT JUN 14 1997 ...THUNDERSTORMS WERE BUILDING OVER SOUTHWEST WYOMING... AT 105 PM RADAR SHOWED THUNDERSTORMS INCREASING ACROSS SOUTHWEST WYOMING. THE STRONGEST STORMS WERE BETWEEN ROCK SPRINGS AND RAWLINS AND WERE MOVING NORTH AROUND 30 MPH. PERSONS TRAVELING ON INTERSTATE 80 BETWEEN ROCK SPRINGS...WAMSUTTER AND RAWLINS SHOULD BE ALERT FOR THESE STORMS. HEAVY RAIN AND SMALL HAIL ARE LIKELY AND DRIVERS COULD ENCOUNTER AREAS OF REDUCED VISIBILITIES AND WATER ON THE ROAD. IF THREATENING WEATHER APPROACHES YOUR AREA...BE PREPARED TO SEEK SHELTER IMMEDIATELY. WCJIN-WYSW BUSH
Special weather statement, Jun 14, 1:07 PM MDT, 1 hour 8 minutes before
WYZ014-018-020-022>025-142110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 106 PM MDT SAT JUN 14 1997 ...THUNDERSTORMS WERE BUILDING OVER SOUTHWEST WYOMING... AT 105 PM RADAR SHOWED THUNDERSTORMS INCREASING ACROSS SOUTHWEST WYOMING. THE STRONGEST STORMS WERE BETWEEN ROCK SPRINGS AND RAWLINS AND WERE MOVING NORTH AROUND 30 MPH. PERSONS TRAVELING ON INTERSTATE 80 BETWEEN ROCK SPRINGS...WAMSUTTER AND RAWLINS SHOULD BE ALERT FOR THESE STORMS. HEAVY RAIN AND SMALL HAIL ARE LIKELY AND DRIVERS COULD ENCOUNTER AREAS OF REDUCED VISIBILITIES AND WATER ON THE ROAD. IF THREATENING WEATHER APPROACHES YOUR AREA...BE PREPARED TO SEEK SHELTER IMMEDIATELY. WCJIN-WYSW BUSH
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 7:32 PM MDT | Tornado Warning | RIW | Big Horn | 33 min |
| Jun 14, 2:15 PM MDT | Flash Flood Warning | RIW | Johnson | 45 min |
| Jun 14, 4:25 PM MDT | Flash Flood Warning | RIW | Hot Springs | 115 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.