Alert archive / Wyoming / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 121, NWS Cheyenne, WY

July 19, 1993Laramie County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 19, 1993, 9:15 PM MDT for Laramie County, Wyoming. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jul 19, 1993, 9:15 PM MDT (03:15 UTC)
Expired
Jul 19, 1993, 9:45 PM MDT
In force
30 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Laramie County, WY

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 3.3 hours before the alert went out and 202 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, Denver, CO at 00:00Z on 1993-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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, Denver, CO at 00:00Z on 1993-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 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
4 J/kg
Mixed-layer CIN
-315 J/kg
Mixed-layer LCL
2652 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
71 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, Jul 19, 5:21 PM MDT, 3 hours 54 minutes before
WYZ070-072-073-200030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
521 PM MDT MON JUL 19 1993

AT 505 PM MDT...A WEATHER SERVICE OBSERVER IN PINE BLUFFS REPORTED PEA
TO MARBLE SIZED HAIL. PINE BLUFFS IS ALONG INTERSTATE 80 NEAR THE
NEBRASKA BORDER ABOUT 38 MILES EAST OF CHEYENNE.

AS EXPECTED...STRONG THUNDERSTORMS DEVELOPED RAPIDLY IN THAT AREA AROUND
5 PM AND WERE MOVING NORTHEAST AT 25 MILES AN HOUR. MORE THUNDERSTORMS
ARE LIKELY TO DEVELOP ALONG THE WYOMING/NEBRASKA BORDER OVER THE NEXT
HOUR OR SO. BESIDES PINE BLUFFS...OTHER COMMUNITIES LIKE LA
GRANGE...HAWK SPRINGS...AND TORRINGTON COULD SEE STRONG THUNDERSTORMS.

A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHEAST AND EAST CENTRAL WYOMING
UNTIL 8 PM. SOME THUNDERSTORMS COULD BECOME SEVERE...AND EVEN PRODUCE
TORNADOES. WHEN THUNDERSTORMS APPROACH...USE GOOD SENSE AND MOVE
INDOORS. STAY THERE UNTIL THE STORMS HAVE PASSED.

WCJIN-WYSE
CAS

&
Special weather statement, Jul 19, 5:21 PM MDT, 3 hours 54 minutes before
WYZ070-072-073-200030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
521 PM MDT MON JUL 19 1993

AT 505 PM MDT...A WEATHER SERVICE OBSERVER IN PINE BLUFFS REPORTED PEA
TO MARBLE SIZED HAIL. PINE BLUFFS IS ALONG INTERSTATE 80 NEAR THE
NEBRASKA BORDER ABOUT 38 MILES EAST OF CHEYENNE.

AS EXPECTED...STRONG THUNDERSTORMS DEVELOPED RAPIDLY IN THAT AREA AROUND
5 PM AND WERE MOVING NORTHEAST AT 25 MILES AN HOUR. MORE THUNDERSTORMS
ARE LIKELY TO DEVELOP ALONG THE WYOMING/NEBRASKA BORDER OVER THE NEXT
HOUR OR SO. BESIDES PINE BLUFFS...OTHER COMMUNITIES LIKE LA
GRANGE...HAWK SPRINGS...AND TORRINGTON COULD SEE STRONG THUNDERSTORMS.

A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHEAST AND EAST CENTRAL WYOMING
UNTIL 8 PM. SOME THUNDERSTORMS COULD BECOME SEVERE...AND EVEN PRODUCE
TORNADOES. WHEN THUNDERSTORMS APPROACH...USE GOOD SENSE AND MOVE
INDOORS. STAY THERE UNTIL THE STORMS HAVE PASSED.

WCJIN-WYSE
CAS

&
Special weather statement, Jul 19, 5:56 PM MDT, 3 hours 19 minutes before
WYZ066-067-068-069-070-071-072-073-200100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
556 PM MDT MON JUL 19 1993

AT 545 PM MDT...A LINE OF THUNDERSTORMS HAD DEVELOPED OVER ALBANY AND
EXTREME SOUTHWEST PLATTE COUNTIES OF SOUTHEAST WYOMING. TWO STRONG
STORMS WERE NOTED ON THIS LINE. ONE WAS NEAR BOSLER OR ABOUT 19 MILES
NORTH OF LARAMIE. THE OTHER WAS IN THE SOUTHWEST CORNER OF PLATTE
COUNTY...ABOUT 20 MILES SOUTHWEST OF CHUGWATER. THE STORMS WERE MOVING
NORTHEAST AT 20 TO 25 MILES AN HOUR.

PEA TO MARBLE SIZED HAIL...WINDS TO 45 MILES AN HOUR...AND LOCALLY HEAVY
RAIN ARE LIKELY. AS THESE STORMS MOVE NORTHEAST...THEY WILL ENCOUNTER
MORE FAVORABLE CONDTIONS AND COULD BECOME SEVERE.

WHEN THUNDERSTORMS ARE IN THE AREA...MAKE THE RIGHT CHOICE AND MOVE
INDOORS UNTIL THEY ARE OUT OF THE AREA. THESE STORMS ARE MOVING THROUGH
HILLY AND MOUNTAINOUS TERRAIN. HEAVY RAIN FALLING IN THESE AREAS COULD
PRODUCE LOCALIZED FLASH FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM FOR SOUTHEAST AND EAST
CENTRAL WYOMING.

WCJIN-WYSE
CAS
Special weather statement, Jul 19, 5:56 PM MDT, 3 hours 19 minutes before
WYZ066-067-068-069-070-071-072-073-200100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
556 PM MDT MON JUL 19 1993

AT 545 PM MDT...A LINE OF THUNDERSTORMS HAD DEVELOPED OVER ALBANY AND
EXTREME SOUTHWEST PLATTE COUNTIES OF SOUTHEAST WYOMING. TWO STRONG
STORMS WERE NOTED ON THIS LINE. ONE WAS NEAR BOSLER OR ABOUT 19 MILES
NORTH OF LARAMIE. THE OTHER WAS IN THE SOUTHWEST CORNER OF PLATTE
COUNTY...ABOUT 20 MILES SOUTHWEST OF CHUGWATER. THE STORMS WERE MOVING
NORTHEAST AT 20 TO 25 MILES AN HOUR.

PEA TO MARBLE SIZED HAIL...WINDS TO 45 MILES AN HOUR...AND LOCALLY HEAVY
RAIN ARE LIKELY. AS THESE STORMS MOVE NORTHEAST...THEY WILL ENCOUNTER
MORE FAVORABLE CONDTIONS AND COULD BECOME SEVERE.

WHEN THUNDERSTORMS ARE IN THE AREA...MAKE THE RIGHT CHOICE AND MOVE
INDOORS UNTIL THEY ARE OUT OF THE AREA. THESE STORMS ARE MOVING THROUGH
HILLY AND MOUNTAINOUS TERRAIN. HEAVY RAIN FALLING IN THESE AREAS COULD
PRODUCE LOCALIZED FLASH FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM FOR SOUTHEAST AND EAST
CENTRAL WYOMING.

WCJIN-WYSE
CAS
Special weather statement, Jul 19, 7:27 PM MDT, 1 hour 48 minutes before
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Special weather statement, Jul 19, 7:28 PM MDT, 1 hour 47 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 6:54 PM MDTSevere Thunderstorm WarningCYSBox Butte36 min
Jul 19, 7:29 PM MDTSevere Thunderstorm WarningCYSSheridan31 min
Jul 19, 8:25 PM MDTSevere Thunderstorm WarningCYSBanner, Kimball35 min
Jul 19, 9:00 PM MDTSevere Thunderstorm WarningCYSKimball30 min
Jul 19, 6:11 PM MDTTornado WarningCYSJohnson34 min
Jul 19, 6:21 PM MDTSevere Thunderstorm WarningCYSPlatte25 min
Jul 19, 6:52 PM MDTSevere Thunderstorm WarningCYSGoshen, Laramie38 min
Jul 19, 7:12 PM MDTSevere Thunderstorm WarningCYSSheridan31 min
Jul 19, 7:45 PM MDTSevere Thunderstorm WarningCYSLaramie45 min
Jul 19, 8:22 PM MDTSevere Thunderstorm WarningCYSLaramie53 min
Jul 20, 1:45 PM MDTTornado WarningCYSBig Horn15 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1993Every severe thunderstorm warning in 1993

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.