Alert archive / Wyoming / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 55, NWS Cheyenne, WY

August 25, 1995Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 25, 1995, 9:06 PM MDT for Platte County, Wyoming. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Aug 25, 1995, 9:06 PM MDT (03:06 UTC)
Expired
Aug 25, 1995, 10:11 PM MDT
In force
65 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Platte County, WY

The radar

The Cheyenne radar (KCYS), 110 km from the middle of the area, began a volume at 03:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 3.1 hours before the alert went out and 274 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, Rapid City, SD at 00:00Z on 1995-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 554 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 00:00Z on 1995-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.193958Sfc1 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
554 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
-35 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCYS 260307 RRA
SVRCYS
WYC031-260415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
906 PM MDT FRI AUG 25 1995
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST WYOMING
 
   ...NORTHEASTERN PLATTE COUNTY
 
THIS INCLUDES THE TOWN OF GLENDO
 
AT 855 PM HAIL UP TO ONE INCH IN DIAMETER WAS REPORTED IN THE TOWN OF
GLENDO...25 MILES SOUTHEAST OF DOUGLAS. THE STORM WAS MOVING SOUTHEAST
AT 15 MPH.
 
 
THIS STORM HAS A HISTORY OF LARGE HAIL.  STAY INDOORS AWAY FROM
WINDOWS!
 
HARRISON
 
&

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, Aug 25, 5:59 PM MDT, 3 hours 7 minutes before
WYZ064-067-260100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
559 PM MDT FRI AUG 25 1995

AT 550PM THE DOPPLER RADAR AT CHEYENNE SHOWED A STRONG THUNDERSTORM
22 MILES NORTHWEST OF WHEATLAND IN THE MOUNTAINS. THE STORM WAS
ABOUT 13 MILES SOUTH-SOUTHWEST OF GLENDO.

THE THUNDERSTORM WAS MOVING TO THE NORTH AT 25 MILES AN HOUR AND
WILL MOVE JUST WEST OF GLENDO BY 630PM.

HAIL...STRONG GUSTY WINDS AND BRIEF HEAVY RAIN SHOULD BE EXPECTED
WITH THIS STORM.  BOATERS ON GLENDO RESERVOIR SHOULD BE PREPARED
TO SEEK SHELTER QUICKLY IF THE STORM APPROACHES.

WCJIN-WYSE

COX
Special weather statement, Aug 25, 6:01 PM MDT, 3 hours 5 minutes before
WYZ064-067-260100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
559 PM MDT FRI AUG 25 1995

AT 550PM THE DOPPLER RADAR AT CHEYENNE SHOWED A STRONG THUNDERSTORM
22 MILES NORTHWEST OF WHEATLAND IN THE MOUNTAINS. THE STORM WAS
ABOUT 13 MILES SOUTH-SOUTHWEST OF GLENDO.

THE THUNDERSTORM WAS MOVING TO THE NORTH AT 25 MILES AN HOUR AND
WILL MOVE JUST WEST OF GLENDO BY 630PM.

HAIL...STRONG GUSTY WINDS AND BRIEF HEAVY RAIN SHOULD BE EXPECTED
WITH THIS STORM.  BOATERS ON GLENDO RESERVOIR SHOULD BE PREPARED
TO SEEK SHELTER QUICKLY IF THE STORM APPROACHES.

WCJIN-WYSE

COX
Special weather statement, Aug 25, 6:30 PM MDT, 2 hours 36 minutes before
WYZ059-060-067-260130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
630 PM MDT FRI AUG 25 1995

AT 620PM THE DOPPLER RADAR AT CHEYENNE SHOWED A VERY STRONG
THUNDERSTORM ABOUT 5 MILES WEST OF GLENDO...OR ABOUT 18 MILES
SOUTHEAST OF DOUGLAS.  ANOTHER STORM HAD JUST DEVELOPED OVER
DOUGLAS.

A THIRD STORM OVER WHEATLAND WAS PRODUCING VERY HEAVY RAIN
BUT NO HAIL HAD BEEN REPORTED.

THE STORMS WERE MOVING TO THE NORTHEAST AT 10 TO 15 MILES AN
HOUR.

HAIL...BRIEF HEAVY RAIN AND STRONG WINDS SHOULD BE EXPECTED WITH
THESE STORMS.  DEADLY LIGHTNING ALSO WILL OCCUR.  THE HEAVY RAIN
MAY CAUSE MINOR FLOODING OF CREEKS...URBAN AREAS AND OTHER LOW
LYING SPOTS.

IF THREATENING WEATHER APPROACHES...BE PREPARED TO MOVE TO A
SAFE PLACE QUICKLY.

WCJIN-WYSE-WYNE

COX
Special weather statement, Aug 25, 6:33 PM MDT, 2 hours 33 minutes before
WYZ059-060-067-260130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
630 PM MDT FRI AUG 25 1995

AT 620PM THE DOPPLER RADAR AT CHEYENNE SHOWED A VERY STRONG
THUNDERSTORM ABOUT 5 MILES WEST OF GLENDO...OR ABOUT 18 MILES
SOUTHEAST OF DOUGLAS.  ANOTHER STORM HAD JUST DEVELOPED OVER
DOUGLAS.

A THIRD STORM OVER WHEATLAND WAS PRODUCING VERY HEAVY RAIN
BUT NO HAIL HAD BEEN REPORTED.

THE STORMS WERE MOVING TO THE NORTHEAST AT 10 TO 15 MILES AN
HOUR.

HAIL...BRIEF HEAVY RAIN AND STRONG WINDS SHOULD BE EXPECTED WITH
THESE STORMS.  DEADLY LIGHTNING ALSO WILL OCCUR.  THE HEAVY RAIN
MAY CAUSE MINOR FLOODING OF CREEKS...URBAN AREAS AND OTHER LOW
LYING SPOTS.

IF THREATENINDG WEATHER APPROACHES...BE PREPARED TO MOVE TO A
SAFE PLACE QUICKLY.

WCJIN-WYSE-WYNE

COX

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 7:24 PM MDTSevere Thunderstorm WarningCYSConverse66 min
Aug 25, 11:07 PM MDTSevere Thunderstorm WarningCYSPlatte32 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1995Every severe thunderstorm warning in 1995

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; radar from the NEXRAD Level II archive.