Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 45, NWS Cheyenne, WY

June 30, 1986Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 30, 1986, 4:44 PM MDT for Sioux County, Nebraska. It was in force for 51 min.

The area

The counties it named.

The facts

Issued: Jun 30, 1986, 4:44 PM MDT (22:44 UTC)
Expired: Jun 30, 1986, 5:35 PM MDT
In force: 51 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Sioux County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.7 hours before the alert went out and 294 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: 2 J/kg
Mixed-layer CIN: -263 J/kg
Mixed-layer LCL: 2784 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 31 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, Jun 30, 1:43 PM MDT, 3 hours 1 minute before

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Special weather statement, Jun 30, 2:17 PM MDT, 2 hours 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
215 PM MDT MON JUN 30 1986

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM FOR EASTERN
WYOMING.

AT 215 PM...WEATHER RADAR AT CHEYENNE INDICATED A BAND OF THUNDERSTORMS
FROM CHEYENNE SOUTHWEST TO JUST SOUTH OF LARAMIE.  THE STRONGEST STORMS
WERE LOCATED JUST WEST AND NORTH OF CHEYENNE.  MOVEMENT WAS NORTHEAST
AT ABOUT 20 MILES AN HOUR.

THESE THUNDERSTORMS WERE NOT REAL STRONG...HENCE NO SEVERE WEATHER
HAS BEEN REPORTED WITH THEM.  HOWEVER...CONDITIONS ARE RIPE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS IN MUCH OF EASTERN WYOMING INTO
THIS EVENING...SO STAY ALERT AND WATCH THE SKY.

DASELER

Special weather statement, Jun 30, 3:02 PM MDT, 1 hour 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
300 PM MDT MON JUN 30 1986

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF THE NEBRASKA
PANHANDLE UNTIL 900PM MDT TONIGHT...

AT 255PM MDT..THUNDERSTORMS HAVE DEVELOPED OVER SOUTHEAST WYOMING
NEAR CHEYENNE THAT WERE MOVING TO THE EAST AT 20 MPH. THESE STORMS
WILL BE REACHING INTO THE SOUTHWEST NEBRASKA PANHANDLE BY 4PM MDT
AND MAY BE ACCOMPANIED BY BRIEF HEAVY RFAIN..GUSTY WIND AND SMALL
HAIL OVER KIMBALL AND BANNER COUNTIES OF THE SOUTHWEST PANHANDLE.
KOSEL

Special weather statement, Jun 30, 3:27 PM MDT, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
325 PM MDT MON JUN 30 1986

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM FOR EASTERN
WYOMING...

BETWEEN 2 TO 230 PM THIS AFTERNOON 1/2 INCH SIZE HAIL AND HEAVY RAINS
WERE REPORTED OVER THE EXTREME NORTHEAST CORNER OF WYOMING BETWEEN
SUNDANCE TO THE SOUTH DAKOTA BORDER.

DOWN IN THE SOUTHEAST CORNER OF THE STATE A THUNDERSTORM MOVED
THROUGH CHEYENNE AROUND 230 PM WITH BRIEF HEAVY RAINS DEPOSITING TWO
TENTHS OF AN INCH OF RAIN AT THE AIRPORT AND A PEAK WIND GUST TO
46 MILES AN HOUR.  THE THUNDERSTORM CONTINUED EAST PASSING HILLSDALE
WITH STRONG WINDS AT 255 PM.

NO SEVERE WEATHER WAS REPORTED WITH THESE STORMS ALTHOUGH THE WERE
CERTAINLY STRONG ONES.  THE THUNDERSTORM IN THE SOUTHEAST CORNER
WILL MOVE INTO THE PINE BLUFFS TO ALBIN AREA BETWEEN 330 TO 4 PM
THIS AFTERNOON.

REMEMBER THAT A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT OVER THE
EASTERN QUARTER OF THE STATE UNTIL 9 PM THIS MONDAY EVENING.  PEOPLE
IN THE EASTERN END OF THE STATE SHOULD THINK ABOUT SAFETY PROCEDURES
FOR SEVERE THUNDERSTORMS.  SEEK SHELTER IF THREATENING WEATHER
APPROACHES AND NOTIFY YOUR LOCAL LAW ENFORCEMENT AGENCY WITH "YOUR
SEVERE WEATHER REPORT WHEN SAFE.
LAUZE

Special weather statement, Jun 30, 4:27 PM MDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
425 PM MDT MON JUN 30 1986

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF THE NEBRASKA
PANHANDLE UNTIL 900PM MDT TONIGHT...

AT 420PM MDT..A STRONG THUNDERSTORM WAS MOVING OUT OF CENTRAL WYOMING
INTO THE EXTREME NORTHWEST CORNER OF THE NEBRASKA PANHANDLE. THIS
THUNDERSTORM WAS MOVING TO THE EAST AT 25 MPH AND WILL CROSS NORTHERN
SIOUX COUNTY..ACCOMPANIED BY BRIEF HEAVY RAIN..STROMG GUSTY WIND AND
HAIL UNTIL 530PM MDT.
KOSEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:21 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	54 min
Jun 29, 8:34 PM MDT	Tornado Warning	CYS	Sioux	26 min
Jun 29, 8:58 PM MDT	Tornado Warning	CYS	Sioux	32 min
Jun 29, 9:26 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	54 min
Jun 29, 10:24 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	51 min
Jun 30, 4:31 AM MDT	Severe Thunderstorm Warning	CYS	Dawes	59 min
Jun 30, 5:28 AM MDT	Severe Thunderstorm Warning	CYS	Sheridan	57 min
Jun 30, 5:10 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sheridan	55 min
Jun 29, 7:15 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	30 min
Jun 29, 8:06 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	24 min
Jun 30, 12:01 AM MDT	Severe Thunderstorm Warning	CYS	Weston	44 min
Jun 30, 12:50 AM MDT	Severe Thunderstorm Warning	CYS	Weston	40 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1986 Every severe thunderstorm warning in 1986

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.