Alert archive / Wyoming / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 87, NWS Cheyenne, WY

July 15, 1994Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 15, 1994, 5:04 PM MDT for Goshen County, Wyoming. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 15, 1994, 5:04 PM MDT (23:04 UTC)
Expired: Jul 15, 1994, 5:45 PM MDT
In force: 41 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Goshen County, WY

What was reported inside it

Time	Report	Where	Remark
Jul 15, 5:35 PM MDT	Tornado F0	W Yoder, WY	For the third straight day, severe thunderstorms effected some portion of southeast Wyoming. One storm developed rapidly over the city of Cheyenne and dropped quarter- to golf ball-size hail across the city and produced two inch hail stones as it moved east.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 11.1 hours before the alert went out and 251 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: 127 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1637 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 10 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 15, 1:51 PM MDT, 3 hours 13 minutes before

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Special weather statement, Jul 15, 2:21 PM MDT, 2 hours 43 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Jul 15, 3:45 PM MDT, 1 hour 19 minutes before

WYZ069-070-152245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
345 PM MDT FRI JUL 15 1994

...ANOTHER STORM HAS BEEN BUILDING NEAR HORSE CREEK...

PEA TO MARBLE SIZED HAIL WAS REPORTED AT HORSE CREEK AT 335 PM MDT.
HORSE CREEK IS 27 MILES NORTHWEST OF CHEYENNE. THE LEADING EDGE OF THE
STORM WAS JUST ON THE NORTHWEST SIDE OF CHEYENNE. A HAM RADIO OPERATOR
WHO WAS STORM SPOTTING REPORTS WINDS IN EXCESS OF 35 MILES AN HOUR.
THE MAIN STORM WAS NORTH OF THIS LOCATION AND WAS MOVING EAST AT
25 MILES AN HOUR. IT WILL CROSS INTERSTATE 25 NEAR THE LITTLE BEAR EXIT
BY 410 PM.

THIS STORM WILL PRODUCE MARBLE SIZED HAIL AND WINDS OF 40 TO 45 MILES AN
HOUR BETWEEN NOW AND 415 PM2.

WCJIN-WYSE
CAS

&

Special weather statement, Jul 15, 4:04 PM MDT, 1 hour before

NEZ001>004-019>022-054>056-152300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
404 PM MDT FRI JUL 15 1994

...TORNADO WATCH FOR THE NEBRASKA PANHANDLE...

A TORNADO WATCH IS IN EFFECT FOR THE ENTIRE NEBRASKA PANHANDLE UNTIL
9 PM MDT.  ALTHOUGH ONLY LIGHT TO MODERATE SHOWER ACTIVITY WAS THE ONLY
INDICATIONS ON RADAR...SEVERE WEATHER DEVELOPMENT COULD OCCUR RAPIDLY.

RESIDENTS OF THE NEBRASKA PANHANDLE SHOULD KEEP AN EYE TO THE SKY INTO
THE EVENING.
KYLE

Special weather statement, Jul 15, 4:33 PM MDT, 31 minutes before

NEZ005-152330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE VALENTINE NE
ISSUED BY SCOTTSBLUFF NE
432 PM MDT (532 PM CDT) FRI JUL 15 1994

...STRONG THUNDERSTORM ENTERING NORTHERN CHERRY COUNTY...

AT 430 PM MDT (530 PM CDT)...RADAR INDICATED A STRONG THUNDERSTORM 15
MILES WEST OF VALENTINE OR NEAR KILGORE NEBRASKA.  THIS STORM WAS MOVING
SOUTHEAST AT 25 MPH AND WILL MOVE ACROSS NORTHERN AND EASTERN CHERRY
COUNTY OVER THE NEXT HOUR.

*PERSONS IN THESE AREAS SHOULD BE PREPARED FOR BRIEF HEAVY
RAIN...DANGEROUS LIGHTNING...GUSTY WIND AND SMALL HAIL THROUGH 530 PM
MDT (630 PM CDT).

HORNE

Special weather statement, Jul 15, 5:03 PM MDT, 1 minute before

NEZ001>004-019>022-054>056-160000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
503 PM MDT FRI JUL 15 1994

...TORNADO WATCH FOR THE NEBRASKA PANHANDLE...

A TORNADO WATCH IS IN EFFECT THE THE ENTIRE NEBRASKA PANHANDLE UNTIL
9 PM MDT.

AT 502 PM MDT...VERY LITTLE SHOWER ACTIVITY WAS INDICATED ON RADAR.
HOWEVER...SEVERE WEATHER OVER WYOMING COULD MOVE INTO THE PANHANDLE OR
COULD DEVELOP RAPIDLY...SO BE PREPARED FOR THE POSSIBILITIES OF
SEVERE WEATHER INTO THE EVENING.
KYLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 2:15 AM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	45 min
Jul 15, 2:42 AM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	48 min
Jul 15, 3:33 AM MDT	Severe Thunderstorm Warning	CYS	Morrill	42 min
Jul 15, 2:37 AM MDT	Flash Flood Warning	CYS	Goshen	2 hr
Jul 15, 2:32 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	43 min
Jul 15, 2:48 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	42 min
Jul 15, 3:05 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	40 min
Jul 15, 3:38 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jul 15, 4:25 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	35 min
Jul 15, 5:45 PM MDT	Tornado Warning	CYS	Goshen	30 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1994 Every severe thunderstorm warning in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.