Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 47, NWS North Platte, NE

July 10, 1987Holt County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 10, 1987, 1:43 AM CDT for Holt County, Nebraska. It was in force for 62 min.

The area

The counties it named.

The facts

Issued: Jul 10, 1987, 1:43 AM CDT (06:43 UTC)
Expired: Jul 10, 1987, 2:45 AM CDT
In force: 62 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Holt 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 6.7 hours before the alert went out and 211 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: 4171 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KOFK 100643
SVROFK
NEC089-100745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
143 AM CDT FRI JUL 10 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 245 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTH CENTRAL NEBRASKA...NORTHERN HOLT

AT 138 AM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 15 MILES
NORTHWEST OF ONEILL IN HOLT COUNTY.  THE THUN	DERSTORM WAS MOVING TO
THE EAST AT 25 MPH.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DEADLY WINDS IN EXCESS
OF 75 MPH...LARGE HAIL...KILLER LIGHTNING...AND TORRENTIAL RAINS
THAT CAN QUICKLY FLOOD A LOW LYING AREA.

 DIRCKSEN 0642Z

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 9, 8:59 PM CDT, 4 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE VALENTINE NE
850 PM CDT THU JUL 9 1987

...SEVERE THUNDERSTORM WARNING FOR NORTHEAST PART OF CHERRY COUNTY
INCLUDING THE TOWN OF VALENTINE OF NORTH CENTRAL NEBRASKA CONTINUES
IN EFFECT UNTIL 9PM CDT. A SEVERE THUNDERSTORM WATCH REMAINS IN
EFFECT UNTIL 11 PM CDT FOR NORTH CENTRAL NEBRASKA.

AT 845 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER VALENTINE.
THIS STORM SHOWED VERY LITTLE MOVEMENT.

THIS STORM IS CAPABLE OF PRODUCTING LARGE HAIL GREATER THAN 3/4 INCH
IN DIAMETER...DAMAGING WIND VERY HEAVY RAINS AND DANGERIOUS LIGHTNING

PERSONS IN THE WARNING AREA SHOULD WATCH FOR QUICKLY CHANGING WEATHER
CONDITIONS AND BE PERPARED TO GO TO SHELTER AT A MONENTS NOTICE

REPORTS OF THIS STORM ARE AS YET VERY SCARCE. THE COZAD RANCHE WHICH
IS LOCATED 10 NORTHWEST OF WOODLAKE REPORTED MARBLE AND PEA SIZE
HAIL AND SO FAR HAVE RECEIVED 1.50 INCHES OF RAIN.

RODDA

Special weather statement, Jul 9, 9:10 PM CDT, 4 hours 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE VALENTINE NE
910 PM CDT THU JUL 9 1987

...SEVERE THUNDERSTORM WARNING FOR NORTHEAST PART OF CHERRY COUNTY
INCLUDING THE TOWN OF VALENTINE OF NORTH CENTRAL NEBRASKA HAS EXPIRED
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT FOR
NORTH CENTRAL NEBRASKA.

AT 9 PM CDT RADAR INDICATED THAT THE THUNDERSTORM OVER VALENTINE HAS
DECREASED IN INTENSITY AND HAS STARTE TO MOVE TO THE EAST AT 15 MPH.

THUNDERSTORMS WILL CONTINUE TO MOVE THROUGH EASTERN CHERRY COUNTY FOR
THE NEXT HOUR. THESE STORMS CAN PRODUCT BREFF HEAVY RAINS...STRONG
GUSTY WINDS...HAIL AND DANERIOUS LIGHTNING.

RODDA

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 7:12 PM CDT	Severe Thunderstorm Warning	LBF	Dundy, Hitchcock	63 min
Jul 9, 7:12 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	63 min
Jul 9, 7:35 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	40 min
Jul 9, 7:47 PM CDT	Severe Thunderstorm Warning	LBF	Grant, Hooker	58 min
Jul 9, 8:00 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	15 min
Jul 9, 8:04 PM CDT	Severe Thunderstorm Warning	LBF	Dundy, Hitchcock	56 min
Jul 9, 8:04 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln	56 min
Jul 9, 8:15 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	45 min
Jul 9, 9:48 PM CDT	Tornado Warning	LBF	Rock	27 min
Jul 10, 6:15 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	115 min
Jul 10, 6:57 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	3 hr

Nearby

Severe Thunderstorm Warnings in Nebraska, 1987 Every severe thunderstorm warning in 1987

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.