Alert archive / Wyoming / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 48, NWS Cheyenne, WY

July 29, 1995Sweetwater County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 29, 1995, 7:17 PM MDT for Sweetwater County, Wyoming. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Jul 29, 1995, 7:17 PM MDT (01:17 UTC)
Expired
Jul 29, 1995, 8:15 PM MDT
In force
58 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Sweetwater County, WY

The nearest sounding before it

Lander/Hunt Fiel, WY (KLND), launched 00:00Z, 1.3 hours before the alert went out and 130 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 00:00Z on 1995-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 466 joules per kilogram.LCLEL10008507005003002001001 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, Lander/Hunt Fiel, WY at 00:00Z on 1995-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.19395878Sfc1 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
466 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
3948 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCYS 300119
SVRCYS
WYC037-300215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
717 PM MDT SAT JUL 29 1995
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST WYOMING
 
   ...NORTH-CENTRAL AND NORTHEASTERN SWEETWATER COUNTY
 
AROUND 705PM A WIND GUST TO 64 MILES AN HOUR WAS LOGGED WITH A
THUNDERSTORM AT THE ROCK SPRINGS AIRPORT.  THE SEVERE THUNDERSTORM
HAD MOVED NORTHEAST OF ROCK SPRINGS AT 35 MILES AN HOUR.
 
THIS WARNING INCLUDES RELIANCE AND SUPERIOR BUT NOT THE CITY
OF ROCK SPRINGS.
 
 
THIS STORM HAS A HISTORY OF DAMAGING dWIND.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!
 
WCJIN-WYSW
COX
 
&

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, Jul 29, 6:42 PM MDT, 35 minutes before
WYZ001-002-003-004-006-007-016-017-300145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
642 PM MDT SAT JUL 29 1995

A SEVERE THUNDERSTORM WATCH HAS BEEN POSTED FOR NORTHWEST WYOMING
UNTIL MIDNIGHT THIS EVENING.

THE WATCH INCLUDES PARK...TETON...AND NORTHERN LINCOLN COUNTIES AS
WELL AS YELLOWSTONE NATIONAL PARK.  SOME CITIES/TOWNS AFFECTED ARE
AFTON...JACKSON...MAMMOTH/HOT SPRINGS AND CODY.

AT 630PM RADAR AND LIGHTNING DETECTION DEVICES SHOWED SCATTERED
THUNDERSTORMS OVER SOUTHEAST IDAHO.  THESE STORMS WERE MOVING TOWARD
THE WESTERN BORDER OF WYOMING.  SOME OF THE IDAHO STORMS PRODUCED
DAMAGING WINDS THIS AFTERNOON.

PEOPLE IN THE WATCH AREA SHOULD REMAIN ALERT TO THE APPROACH
OF FAST MOVING THUNDERSTORMS.  BE PREPARED TO MOVE TO A SAFE
PLACE QUICKLY IN THE NEED ARISES.

WCJIN-WYNW

COX
Special weather statement, Jul 29, 6:44 PM MDT, 33 minutes before
WYZ001-002-003-004-006-007-016-017-300145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
642 PM MDT SAT JUL 29 1995

A SEVERE THUNDERSTORM WATCH HAS BEEN POSTED FOR NORTHWEST WYOMING
UNTIL MIDNIGHT THIS EVENING.

THE WATCH INCLUDES PARK...TETON...AND NORTHERN LINCOLN COUNTIES AS
WELL AS YELLOWSTONE NATIONAL PARK.  SOME CITIES/TOWNS AFFECTED ARE
AFTON...JACKSON...MAMMOTH/HOT SPRINGS AND CODY.

AT 630PM RADAR AND LIGHTNING DETECTION DEVICES SHOWED SCATTERED
THUNDERSTORMS OVER SOUTHEAST IDAHO.  THESE STORMS WERE MOVING TOWARD
THE WESTERN BORDER OF WYOMING.  SOME OF THE IDAHO STORMS PRODUCED
DAMAGING WINDS THIS AFTERNOON.

PEOPLE IN THE WATCH AREA SHOULD REMAIN ALERT TO THE APPROACH
OF FAST MOVING THUNDERSTORMS.  BE PREPARED TO MOVE TO A SAFE
PLACE QUICKLY IN THE NEED ARISES.

WCJIN-WYNW

COX

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 3:30 PM MDTSevere Thunderstorm WarningCYSAlbany45 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.