Alert archive / Wyoming / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 3, NWS Cheyenne, WY

April 26, 1989Albany County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Apr 26, 1989, 4:14 PM MDT for Albany County, Platte County, Wyoming. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Apr 26, 1989, 4:14 PM MDT (22:14 UTC)
Expired
Apr 26, 1989, 5:15 PM MDT
In force
61 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Albany County, WY, Platte County, WY

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 10.2 hours before the alert went out and 294 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.

Skew-T log-pSkew-T log-p diagram, Lander/Hunt Fiel, WY at 12:00Z on 1989-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lander/Hunt Fiel, WY at 12:00Z on 1989-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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, 12:26 PM MDT, 3 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1220 PM MDT WED APR 26 1989

...A DEVELOPING SPRING STORM WILL BRING A RETURN TO WINTER LIKE WEATHER
TO WYOMING THROUGH THURSDAY NIGHT...

A DEVELOPING SPRING STORM OVER THE WESTERN UNITED STATES AT NOONTIME
WEDNESDAY WILL CONTINUE TO MOVE SLOWLY EAST. THIS STORM WILL BRING A
RETURN TO WINTER WEATHER TO WYOMING LATE TONIGHT THROUGH THURSDAY
NIGHT.

THE PRECIPITATION WILL BE MAINLY IN THE FORM OF SNOW ACROSS NORTHERN
WYOMING LATE TONIGHT AND THURSDAY...WITH SIGNIFICANT SNOWFALL LIKELY.
THE HEAVIER AMOUNTS WILL BE IN THE ABSAROKA AND BIG HORN MOUNTAINS. THE
POSSIBILITY OF SNOW WILL SPREAD TO SOUTHERN WYOMING THURSDAY NIGHT.

MEANWHILE...AHEAD OF THE SPRING STORM SYSTEM WILL BE SHOWERS AND
THUNDERSTORMS. AT NOON MDT A LARGE AREA OF THUNDERSTORMS WAS NOTED
FROM SOUTH OF JACKSON TO NEAR ROCK SPRINGS. THIS AREA WAS MOVING TO
THE NORTHEAST AT 30 MILES AN HOUR. THUNDERSTORMS WILL OCCUR OVER MAINLY
THE SOUTH AND EAST PARTS OF THE STATE THIS AFTERNOON AND EARLY TONIGHT.
SOME OF THESE STORMS MAY PRODUCE...STRONG WIND GUSTS...HAIL AND BRIEF
HEAVY RAIN...ESPECIALLY IN EASTERN WYOMING.

THIS IS A POTENTIALLY DANGEROUS SPRING STORM AND THOSE TRAVELING OR
WITH OUTSIDE INTERESTS SHOULD BE AWARE OF THE POSSIBILITY OF
THUNDERSTORMS THROUGH THIS EVENING AND SIGNIFICANT SNOWFALL ACROSS
THE NORTH LATE TONIGHT AND THURSDAY. STOCKMEN IN THE NORTH PART OF 7THE
STATE SHOULD TAKE PRECAUTIONS TO PROTECT YOUNG LIVESTOCK FROM THE COLD
AND WET WEATHER.
WEILAND

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 3:16 PM MDTSevere Thunderstorm WarningCYSAlbany59 min
Apr 26, 4:46 PM MDTSevere Thunderstorm WarningCYSGoshen59 min
Apr 26, 5:16 PM MDTSevere Thunderstorm WarningCYSPlatte44 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; the sounding from the Mesonet's radiosonde archive.