Alert archive / Wyoming / Tornado Warnings in 1994

Tornado Warning 12, NWS Cheyenne, WY

July 13, 1994Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 13, 1994, 6:30 PM MDT for Platte County, Wyoming. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Jul 13, 1994, 6:30 PM MDT (00:30 UTC)
Expired: Jul 13, 1994, 7:00 PM MDT
In force: 30 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Platte County, WY

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 0.5 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-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: 31 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1559 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 92 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 tornado 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 13, 4:36 PM MDT, 1 hour 54 minutes before

WYZ067-068-069-070-132345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
436 PM MDT WED JUL 13 1994

...PEA SIZED HAIL ON THE EAST SIDE OF CHEYENNE...

AT 425 PM MDT...A THUNDERSTORM WAS ON THE NORTHEAST SIDE OF CHEYENNE. AN
OBSERVER IN THE AREA REPORTED PEA SIZED HAIL. NO STRONG WINDS WERE
REPORTED.

THIS THUNDERSTORM WAS MOVING A LITTLE SOUTH OF EAST AND WILL BE MOVING
OVER INTERSTATE 80 MIDWAY BETWEEN CHEYENNE AND HILLSDAILE. HILLSDALE IS
ABOUT 18 MILES EAST OF CHEYENNE.

RADAR INDICATED THAT THIS STORM IS PRODUCING LOCALLY HEAVY RAIN ALONG
WITH THE PEA SIZED HAIL. MOTORISTS SHOULD SLOW DOWN OR PULL OVER FOR A
FEW MOMENTS AS THIS STORM MOVES OVER INTERSTATE 80 BETWEEN NOW AND 445
PM MDT.

WCJIN-WYSE
CAS

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Special weather statement, Jul 13, 4:38 PM MDT, 1 hour 52 minutes before

WYZ067-068-069-070-132345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
436 PM MDT WED JUL 13 1994

...PEA SIZED HAIL ON THE EAST SIDE OF CHEYENNE...

AT 425 PM MDT...A THUNDERSTORM WAS ON THE NORTHEAST SIDE OF CHEYENNE. AN
OBSERVER IN THE AREA REPORTED PEA SIZED HAIL. NO STRONG WINDS WERE
REPORTED.

THIS THUNDERSTORM WAS MOVING A LITTLE SOUTH OF EAST AND WILL BE MOVING
OVER INTERSTATE 80 MIDWAY BETWEEN CHEYENNE AND HILLSDAILE. HILLSDALE IS
ABOUT 18 MILES EAST OF CHEYENNE.

RADAR INDICATED THAT THIS STORM IS PRODUCING LOCALLY HEAVY RAIN ALONG
WITH THE PEA SIZED HAIL. MOTORISTS SHOULD SLOW DOWN OR PULL OVER FOR A
FEW MOMENTS AS THIS STORM MOVES OVER INTERSTATE 80 BETWEEN NOW AND 445
PM MDT.

WCJIN-WYSE
CAS

&

Special weather statement, Jul 13, 4:58 PM MDT, 1 hour 32 minutes before

WYZ067-068-069-070-140000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
458 PM MDT WED JUL 13 1994

...STRONG THUNDERSTORMS WILL MOVE THROUGH WHEATLAND BY 515 PM...

AT 455 PM...NATIONAL WEATHER SERVICE RADAR SHOWED A STRONG THUNDERSTORM
10 MILES NORTHWEST OF WHEATLAND...MOVING SOUTHEAST AT 20 MILES AN HOUR.
THIS STORM WILL LIKELY PRODUCE HEAVY RAIN...GUSTY WINDS AND SOME PEA
SIZED HAIL AS IT MOVES THROUGH WHEATLAND SHORTLY AFTER 5 PM.

IF YOU ARE NEAR THIS STORM...OR ANY OTHER THUNDERSTORMS...YOU SHOULD
MOVE INSIDE A STURDY BUILDING UNTIL AFTER THE STORMS PASS.  REMEMBER
THAT ..ALL.. THUNDERSTORMS CONTAIN LIGHTNING...WHICH CAN START FIRES AND
CAUSE ELECTROCUTION.

WCJIN-WYSE
JBS

Special weather statement, Jul 13, 4:59 PM MDT, 1 hour 31 minutes before

WYZ067-068-069-070-140000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
458 PM MDT WED JUL 13 1994

...STRONG THUNDERSTORMS WILL MOVE THROUGH WHEATLAND BY 515 PM...

AT 455 PM...NATIONAL WEATHER SERVICE RADAR SHOWED A STRONG THUNDERSTORM
10 MILES NORTHWEST OF WHEATLAND...MOVING SOUTHEAST AT 20 MILES AN HOUR.
THIS STORM WILL LIKELY PRODUCE HEAVY RAIN...GUSTY WINDS AND SOME PEA
SIZED HAIL AS IT MOVES THROUGH WHEATLAND SHORTLY AFTER 5 PM.

IF YOU ARE NEAR THIS STORM...OR ANY OTHER THUNDERSTORMS...YOU SHOULD
MOVE INSIDE A STURDY BUILDING UNTIL AFTER THE STORMS PASS.  REMEMBER
THAT ..ALL.. THUNDERSTORMS CONTAIN LIGHTNING...WHICH CAN START FIRES AND
CAUSE ELECTROCUTION.
 4
WCJIN-WYSE
JBS

Special weather statement, Jul 13, 5:14 PM MDT, 1 hour 16 minutes before

WYZ069-070-140000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
514 PM MDT WED JUL 13 1994

...STRONG THUNDERSTORMS WERE MOVING THROUGH EASTERN LARAMIE COUNTY...

AT 510 PM...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF STRONG
THUNDERSTORMS ABOUT 15 MILES WEST OF PINE BLUFFS.  THESE STORMS WERE
MOVING EAST AROUND 20 MILES AN HOUR.  WITH THIS MOVEMENT...THE PINE
BLUFFS AREA SHOULD SEE THESE STORMS BETWEEN 530 AND 545 PM.

EXPECT GUSTY WINDS...BRIEF HEAVY RAIN AND SMALL HAIL AS THE STORMS MOVE
THORUGH.  MOVE TO A SAFE INDOOR SHELTER UNTIL THE STORMS HAVE PASSED.

WCJIN-WYSE
AR

Special weather statement, Jul 13, 5:14 PM MDT, 1 hour 16 minutes before

WYZ069-070-140000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
514 PM MDT WED JUL 13 1994

...STRONG THUNDERSTORMS WERE MOVING THROUGH EASTERN LARAMIE COUNTY...

AT 510 PM...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF STRONG
THUNDERSTORMS ABOUT 15 MILES WEST OF PINE BLUFFS.  THESE STORMS WERE
MOVING EAST AROUND 20 MILES AN HOUR.  WITH THIS MOVEMENT...THE PINE
BLUFFS AREA SHOULD SEE THESE STORMS BETWEEN 530 AND 545 PM.

EXPECT GUSTY WINDS...BRIEF HEAVY RAIN AND SMALL HAIL AS THE STORMS MOVE
THORUGH.  MOVE TO A SAFE INDOOR SHELTER UNTIL THE STORMS HAVE PASSED.

WCJIN-WYSE
AR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 6:09 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	51 min
Jul 13, 6:18 PM MDT	Tornado Warning	CYS	Goshen	27 min
Jul 13, 6:22 PM MDT	Severe Thunderstorm Warning	CYS	Platte	53 min
Jul 13, 6:28 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	32 min
Jul 13, 6:47 PM MDT	Tornado Warning	CYS	Goshen	28 min
Jul 13, 7:08 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	52 min
Jul 13, 7:22 PM MDT	Tornado Warning	CYS	Albany	38 min
Jul 13, 7:49 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	26 min
Jul 13, 8:12 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	48 min
Jul 13, 9:43 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	22 min

Nearby

Tornado Warnings in Wyoming, 1994 Every tornado warning in 1994 Tornadoes 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; the sounding from the Mesonet's radiosonde archive.