Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 11, NWS Hastings, NE

April 12, 1991Hamilton County, Nebraska

NWS Hastings, NE issued this tornado warning at Apr 12, 1991, 5:38 PM CDT for Hamilton County, Nebraska. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Apr 12, 1991, 5:38 PM CDT (22:38 UTC)
Expired
Apr 12, 1991, 6:15 PM CDT
In force
37 min
Issued by
NWS Hastings, NE
Area
Whole counties

County Hamilton County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.6 hours before the alert went out and 218 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 1991-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 1991-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 551 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
585 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
551 m²/s²
0-3 km storm-relative helicity
649 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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, Apr 12, 3:38 PM CDT, 2 hours before
NEZ008-013>015-017>019-122145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND ISLAND NE
335 PM CDT FRI APR 12 1991

...TORNADO WATCH FOR SOUTHCENTRAL NEBRASKA UNTIL 800 PM CDT...

A STRONG THUNDERSTORM HAD FORMED IN SOUTH CENTRAL NEBRASKA...25 MILES
SOUTH SOUTHWEST OF HASTINGS.  THIS STORM LIKELY CONTAINS VERY HEAVY
RAIN...STRONG GUSTY WIND...DANGEROUS LIGHTNING...AND POSSIBLY HAIL.
THIS STRONG THUNDERSTORM WILL MOVE NORTHEAST...AND INTO THE HASTINGS
AREA BETWEEN 400 PM AND 430 PM CDT.

OTHER THUNDERSHOWERS HAD FORMED ALONG THE KANSAS/NEBRASKA IN THAYER
COUNTY...25 MILES SOUTHWEST OF BEATRICE.  THESE THUNDERSHOWERS WERE
MOVING TO THE NORTHEAST AT 30 MPH.

BW

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 7:40 PM CDTTornado WarningGIDAdams50 min
Apr 11, 7:50 PM CDTTornado WarningGIDClay, Fillmore25 min
Apr 11, 8:11 PM CDTTornado WarningGIDFranklin, Kearney, Webster64 min
Apr 11, 8:11 PM CDTTornado WarningGIDNuckolls64 min
Apr 11, 8:14 PM CDTSevere Thunderstorm WarningGIDHall, Hamilton, Merrick61 min
Apr 11, 8:31 PM CDTTornado WarningGIDNuckolls54 min
Apr 11, 8:31 PM CDTTornado WarningGIDFillmore, York59 min
Apr 11, 8:50 PM CDTSevere Thunderstorm WarningGIDAdams, Hall55 min
Apr 11, 9:18 PM CDTSevere Thunderstorm WarningGIDClay, Fillmore57 min
Apr 11, 9:48 PM CDTSevere Thunderstorm WarningGIDClay, Hamilton57 min
Apr 11, 10:00 PM CDTTornado WarningGIDClay, Hamilton30 min
Apr 11, 10:23 PM CDTSevere Thunderstorm WarningGIDPolk, York67 min
Apr 11, 10:40 PM CDTTornado WarningGIDFranklin, Webster35 min
Apr 11, 11:18 PM CDTSevere Thunderstorm WarningGIDPolk, York57 min
Apr 11, 11:56 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Hamilton64 min
Apr 12, 12:50 AM CDTSevere Thunderstorm WarningGIDHamilton, Merrick, Polk, York55 min
Apr 12, 12:50 AM CDTSevere Thunderstorm WarningGIDClay55 min
Apr 12, 4:10 PM CDTSevere Thunderstorm WarningGIDAdams, Hall, Hamilton65 min
Apr 12, 4:49 PM CDTSevere Thunderstorm WarningGIDAdams, Webster56 min
Apr 12, 5:22 PM CDTTornado WarningGIDClay38 min
Apr 12, 6:09 PM CDTTornado WarningGIDHamilton, Merrick36 min
Apr 12, 6:18 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Hamilton57 min

Nearby

Tornado Warnings in Nebraska, 1991Every tornado warning in 1991Tornadoes in 1991

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.