Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 68, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 1998, 2:00 PM MDT for Goshen County, Wyoming. It was in force for 45 min. 1 report 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 13, 1998, 2:00 PM MDT (20:00 UTC)
- Expired
- Jun 13, 1998, 2:45 PM MDT
- In force
- 45 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen County, WY
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 2:03 PM MDT | Hail 0.75 | Ft Laramie, 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
Rapid City, SD (KUNR), launched 12:00Z, 8.0 hours before the alert went out and 251 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
- 117 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 2129 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
943 WUUS1 KCYS 132000 RRB SVRCYS WYC015-132045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 200 PM MDT SAT JUN 13 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GOSHEN COUNTY IN SOUTHEASTERN WYOMING * UNTIL 245 PM MDT * AT 156 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES WEST OF FORT LARAMIE... MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FORT LARAMIE AT 210 PM MDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS WCJIN-WYSE ROBINSON
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.
In the hours before
Special weather statement, Jun 13, 9:50 AM MDT, 4 hours 10 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, 4 hours 10 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, 1:17 PM MDT | Tornado Warning | CYS | Laramie | 33 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
Severe Thunderstorm Warnings in Wyoming, 1998Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.