Alert archive / Wyoming / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 17, NWS Cheyenne, WY

May 28, 1993Johnson County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 28, 1993, 5:02 PM MDT for Johnson County, Wyoming. It was in force for 28 min.

The area

The counties it named.

The facts

Issued: May 28, 1993, 5:02 PM MDT (23:02 UTC)
Expired: May 28, 1993, 5:30 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Johnson County, WY

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 11.0 hours before the alert went out and 296 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 596 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 191 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, May 28, 4:15 PM MDT, 47 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, May 28, 4:16 PM MDT, 46 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, May 28, 4:20 PM MDT, 42 minutes before

WYZ059>062-067>073-282330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
420 PM MDT FRI MAY 28 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF SOUTHEAST WYOMING
UNTIL 900 PM...

THE SEVERE THUNDERSTORM WATCH FOR MOST OF SOUTHEAST WYOMING REMAINS IN
EFFECT UNTIL 900 PM.  THE WATCH MEANS THAT THUNDERSTORMS MAY PRODUCE
STRONG WIND GUSTS...LARGE HAIL AND HEAVY RAINFALL.

AT 420 PM...THUNDERSTORMS CONTINUED OVER SOUTHEAST WYOMING.  MANY OF
THE STORMS WERE PRODUCING HEAVY RAIN.  THE STORMS WERE MAINLY IN A LINE
FROM 15 MILES NORTHWEST OF CHEYENNE TO JUST SOUTH OF TORRINGTON.  THE
THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR.

NO SEVERE WEATHER HAS BEEN REPORTED IN SOUTHEAST WYOMING SO FAR THIS
AFTERNOON.  THE INTENSE THUNDERSTORMS OVER THE AREA AT 420 PM WERE
PRODUCING HEAVY RAIN...WIND GUSTS TO 35 MILES AN HOUR...SMALL HAIL AND
DANGEROUS LIGHTNING.

THUNDERSTORMS WIKL CONTINUE IN SOUTHEAST WYOMING THROUGH TBE EVENING
HOURS.  DURING THAT TIME...SOME OF THE STORMS MAY PRODUCE SEVERE
WEATHER.

WHEN A THUNDERSTORM APPROACHES...MOVE INDOORS FOR SAFETY.  LIGHTNING
CAN BE DEADLY.

WYJIN-WYSE
WEILAND

Special weather statement, May 28, 4:23 PM MDT, 39 minutes before

WYZ059>062-067>073-282330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
420 PM MDT FRI MAY 28 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF SOUTHEAST WYOMING
UNTIL 900 PM...

THE SEVERE THUNDERSTORM WATCH FOR MOST OF SOUTHEAST WYOMING REMAINS IN
EFFECT UNTIL 900 PM.  THE WATCH MEANS THAT THUNDERSTORMS MAY PRODUCE
STRONG WIND GUSTS...LARGE HAIL AND HEAVY RAINFALL.

AT 420 PM...THUNDERSTORMS CONTINUED OVER SOUTHEAST WYOMING.  MANY OF
THE STORMS WERE PRODUCING HEAVY RAIN.  THE STORMS WERE MAINLY IN A LINE
FROM 15 MILES NORTHWEST OF CHEYENNE TO JUST SOUTH OF TORRINGTON.  THE
THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR.

NO SEVERE WEATHER HAS BEEN REPORTED IN SOUTHEAST WYOMING SO FAR THIS
AFTERNOON.  THE INTENSE THUNDERSTORMS OVER THE AREA AT 420 PM WERE
PRODUCING HEAVY RAIN...WIND GUSTS TO 35 MILES AN HOUR...SMALL HAIL AND
DANGEROUS LIGHTNING.

THUNDERSTORMS WIKL CONTINUE IN SOUTHEAST: WYOMING THROUGH TBE EVENING
HOURS.  DURING THAT TIME...SOME OF THE STORMS MAY PRODUCE SEVERE
WEATHER.

WHEN A THUNDERSTORM APPROACHES...MOVE INDOORS FOR SAFETY.  LIGHTNING
CAN BE DEADLY.

WYJIN-WYSE
WEILAND

Special weather statement, May 28, 4:50 PM MDT, 12 minutes before

WYZ059>062-067>073-290030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
450 PM MDT FRI MAY 28 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF SOUTHEAST WYOMING
UNTIL 900 PM...

THE SEVERE THUNDERSTORM WATCH FOR MOST OF SOUTHEAST WYOMING REMAINS IN
EFFECT UNTIL 900 PM.  THE WATCH MEANS THAT THUNDERSTORMS MAY PRODUCE
STRONG WIND GUSTS...LARGE HAIL AND HEAVY RAINFALL.

AT 440 PM...INTENSE THUNDERSTORMS CONTINUED OVER SOUTHEAST WYOMING.
THE STORMS WERE PRODUCING HEAVY RAIN...HAIL...GUSTY WINDS AND DANGEROUS
LIGHTNING.  THE INTENSE STORMS WERE LOCATED FROM 15 MILES SOUTH OF
TORRINGTON TO 5 MILES NORTH OF CHEYENNE.  IN ADDITION...INTENSE
THUNDERSTORMS HAD DEVELOPED ABOUT 15 MILES EAST OF CHEYENNE.

NO SEVERE WEATHER HAS BEEN REPORTED WITH ANY OF THE INTENSE STORMS.
HOWEVER...ONE HALF INCH DIAMETER HAIL WAS REPORTED 20 MILES SOUTH OF
TORRINGTON AT 430 PM.  HEAVY RAIN WAS NOTED WITH MOST STORMS.  ALL OF
THE STORMS WERE MOVING NORTHEAST...BUT DEVELOPING BACK TO THE
SOUTHWEST.

AT 445 PM...THREE QUARTER INCH DIAMETER HAIL WAS REPORTED AT NUNN
COLORADO.  THIS STORM MAY MOVE INTO SOUTHERN LARAMIE COUNTY BY 515
PM.

THUNDERSTORMS WILL CONTINUE IN SOUTHEAST WYOMING THROUGH THE EVENING
HOURS.  DURING THAT TIME...SOME OF THE STORMS MAY PRODUCE SEVERE
WEATHER.

WHEN A THUNDERSTORM APPROACHES...MOVE INDOORS FOR SAFETY.  BE AWARE
OF THE POTENTIAL FOR HEAVY RAIN AND FLASH FLOODING.  DO NOT ATTEMPT
TO CROSS ROADS OR BRIDGES WHERE WATER IS RUNNING OVER.

WYJIN-WYSE
WEILAND

Special weather statement, May 28, 4:56 PM MDT, 6 minutes before

WYZ059>062-067>073-290030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
450 PM MDT FRI MAY 28 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF SOUTHEAST WYOMING
UNTIL 900 PM...

THE SEVERE THUNDERSTORM WATCH FOR MOST OF SOUTHEAST WYOMING REMAINS IN
EFFECT UNTIL 900 PM.  THE WATCH MEANS THAT THUNDERSTORMS MAY PRODUCE
STRONG WIND GUSTS...LARGE HAIL AND HEAVY RAINFALL.

AT 440 PM...INTENSE THUNDERSTORMS CONTINUED OVER SOUTHEAST WYOMING.
THE STORMS WERE PRODUCING HEAVY RAIN...HAIL...GUSTY WINDS AND DANGEROUS
LIGHTNING.  THE INTENSE STORMS WERE LOCATED FROM 15 MILES SOUTH OF
TORRINGTON TO 5 MILES NORTH OF CHEYENNE.  IN ADDITION...INTENSE
THUNDERSTORMS HAD DEVELOPED ABOUT 15 MILES EAST OF CHEYENNE.

NO SEVERE WEATHER HAS BEEN REPORTED WITH ANY OF THE INTENSE STORMS.
HOWEVER...ONE HALF INCH DIAMETER HAIL WAS REPORTED 20 MILES SOUTH OF
TORRINGTON AT 430 PM.  HEAVY RAIN WAS NOTED WITH MOST STORMS.  ALL OF
THE STORMS WERE MOVING NORTHEAST...BUT DEVELOPING BACK TO THE
SOUTHWEST.

AT 445 PM...THREE QUARTER INCH DIAMETER HAIL WAS REPORTED AT NUNN
COLORADO.  THIS STORM MAY MOVE INTO SOUTHERN LARAMIE COUNTY BY 515
PM.

THUNDERSTORMS WILL CONTINUE IN SOUTHEAST WYOMING THROUGH THE EVENING
HOURS.  DURING THAT TIME...SOME OF THE STORMS MAY PRODUCE SEVERE
WEATHER.

WHEN A THUNDERSTORM APPROACHES...MOVE INDOORS FOR SAFETY.  BE AWARE
OF THE POTENTIAL FOR HEAVY RAIN AND FLASH FLOODING.  DO NOT ATTEMPT
TO CROSS ROADS OR BRIDGES WHERE WATER IS RUNNING OVER.

WYJIN-WYSE
WEILAND

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 6:11 PM MDT	Severe Thunderstorm Warning	CYS	Washakie	49 min
May 27, 9:20 PM MDT	Severe Thunderstorm Warning	CYS	Johnson	40 min
May 28, 5:03 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	42 min
May 28, 5:38 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	67 min
May 28, 5:52 PM MDT	Tornado Warning	CYS	Goshen	28 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1993 Every 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.