Alert archive / Wyoming / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 7, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Apr 26, 1989, 7:04 PM MDT for Goshen County, Wyoming. It was in force for 41 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
- Apr 26, 1989, 7:04 PM MDT (01:04 UTC)
- Expired
- Apr 26, 1989, 7:45 PM MDT
- In force
- 41 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 26, 7:25 PM MDT | Hail 0.75 | Goshen, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Rapid City, SD (KRAP), launched 00:00Z, 1.1 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 338 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
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.
In the hours before
Special weather statement, Apr 26, 4:23 PM MDT, 2 hours 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 420 PM MDT WED APR 26 1989 ...WINTER STORM WATCH HAS BEEN POSTED FOR NORTH WYOMING ON THURSDAY... A DEVELOPING SPRING STORM OVER UTAH THIS AFTERNOON WILL MOVE NORTHEAST THROUGH FRIDAY. THIS STORM WILL BRING A RETURN TO WINTER WEATHER TO MUCH OF WYOMING...PARTICULARLY NORTH WYOMING ON THURSDAY. THEREFORE... A WINTER STORM WATCH HAS BEEN POSTED FOR NORTH WYOMING ON THURSDAY. THE PRECIPITATION WILL BE MAINLY IN THE FORM OF SNOW ACROSS NORTH WYOMING TONIGHT INTO FRIDAY. SNOWFALL AMOUNTS OF SIX TO EIGHT INCHES CAN BE EXPECTED LOWER ELEVATIONS THURSDAY WITH UP TO ONE FOOT IN THE MOUNTAINS. TRAVELERS ACROSS NORTH WYO MING TONIGHT INTO FRIDAY SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS...PARTICULARLY ALONG THE HIGH MOUNTAINS PASSES. ALSO...THIS COMBINATION OF WET SNOW... COLD TEMPERATURES AND BRISK WINDS WILL BE HAZARDOUS TO YOUNG LIVESTOCK. MCRANDAL
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 7:51 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 69 min |
| Apr 26, 8:11 PM MDT | Tornado Warning | CYS | Sioux | 34 min |
| Apr 26, 8:24 PM MDT | Tornado Warning | CYS | Box Butte, Dawes, Sioux | 36 min |
| Apr 26, 6:20 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1989Every severe thunderstorm warning in 1989
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.