Alert archive / Wyoming / Tornado Warnings in 1998
Tornado Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 13, 1998, 1:17 PM MDT for Laramie County, Wyoming. It was in force for 33 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 13, 1998, 1:17 PM MDT (19:17 UTC)
- Expired
- Jun 13, 1998, 1:50 PM MDT
- In force
- 33 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 7.3 hours before the alert went out and 202 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
- 2464 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 131915 RRA TORCYS WYC021-131950- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 117 PM MDT SAT JUN 13 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... SOUTH CENTRAL LARAMIE COUNTY IN SOUTHEASTERN WYOMING * UNTIL 150 PM MDT * AT 113 PM MDT... SPOTTERS INDICATED A FUNNEL CLOUD OVER CHEYENNE...MOVING NORTHEAST AT 15 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... CHEYENNE NOW GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! WCJIN-WYSE JMR
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 13, 9:50 AM MDT, 3 hours 27 minutes before
WYZ061>070-NEZ001>003-019>021-054-055-140000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 950 AM MDT SAT JUN 13 1998 THE RISK OF SEVERE WEATHER OVER SOUTHEAST WYOMING IS LOW THIS AFTERNOON AND HIGH IN THE WESTERN NEBRASKA PANHANDLE. SPOTTER ACTIVATION WILL LIKELY BE REQUIRED ESPECIALLY FROM CHADRON TO SIDNEY. DISCUSSION...THUNDERSTORMS WILL BE NUMEROUS OVER SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE THIS AFTERNOON. THE AIRMASS WILL BE MOIST AND UNSTABLE AHEAD OF AN AREA OF LOW PRESSURE WHICH WILL MOVE FROM NORTHWEST COLORADO TO NORTHWEST NEBRASKA BY THE EARLY EVENING. FOR MOST OF SOUTHEAST WYOMING...THE THUNDERSTORMS WILL PRODUCE WIND GUSTS TO NEAR 60 MPH AND ONLY LIGHT RAIN. HOWEVER...FROM THE WYOMING AND NEBRASKA BORDER AND THROUGH THE WESTERN NEBRASKA PANHANDLE...THE STORMS WILL BE STRONG STARTING EARLY IN THE AFTERNOON. IN THE AREA FROM CHADRON TO SIDNEY...LARGE HAIL...STRONG WIND GUSTS ARE A GOOD POSSIBILITY WITH THE THUNDERSTORMS. WCJIN-WYSE-WYNE- WEILAND
Special weather statement, Jun 13, 9:50 AM MDT, 3 hours 27 minutes before
WYZ061>070-NEZ001>003-019>021-054-055-140000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 950 AM MDT SAT JUN 13 1998 THE RISK OF SEVERE WEATHER OVER SOUTHEAST WYOMING IS LOW THIS AFTERNOON AND HIGH IN THE WESTERN NEBRASKA PANHANDLE. SPOTTER ACTIVATION WILL LIKELY BE REQUIRED ESPECIALLY FROM CHADRON TO SIDNEY. DISCUSSION...THUNDERSTORMS WILL BE NUMEROUS OVER SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE THIS AFTERNOON. THE AIRMASS WILL BE MOIST AND UNSTABLE AHEAD OF AN AREA OF LOW PRESSURE WHICH WILL MOVE FROM NORTHWEST COLORADO TO NORTHWEST NEBRASKA BY THE EARLY EVENING. FOR MOST OF SOUTHEAST WYOMING...THE THUNDERSTORMS WILL PRODUCE WIND GUSTS TO NEAR 60 MPH AND ONLY LIGHT RAIN. HOWEVER...FROM THE WYOMING AND NEBRASKA BORDER AND THROUGH THE WESTERN NEBRASKA PANHANDLE...THE STORMS WILL BE STRONG STARTING EARLY IN THE AFTERNOON. IN THE AREA FROM CHADRON TO SIDNEY...LARGE HAIL...STRONG WIND GUSTS ARE A GOOD POSSIBILITY WITH THE THUNDERSTORMS. WCJIN-WYSE-WYNE- WEILAND
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 2:00 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 45 min |
| Jun 13, 3:00 PM MDT | Tornado Warning | CYS | Goshen | 35 min |
| Jun 13, 3:32 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 48 min |
Nearby
Tornado Warnings in Wyoming, 1998Every tornado warning in 1998Tornadoes in 1998
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.