Alert archive / Nebraska / Flash Flood Warnings in 1990

Flash Flood Warning 9, NWS Hastings, NE

August 14, 1990Dawson County, Nebraska

NWS Hastings, NE issued this flash flood warning at Aug 14, 1990, 8:32 PM CDT for Dawson County, Nebraska. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Aug 14, 1990, 8:32 PM CDT (01:32 UTC)
Expired: Aug 14, 1990, 11:30 PM CDT
In force: 3 hr
Issued by: NWS Hastings, NE
Area: Whole counties

County Dawson 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, 1.5 hours before the alert went out and 72 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: 705 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1113 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRI 150132
FFWGRI
NEC047-150430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE GRAND ISLAND NE
832 PM CDT TUE AUG 14 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1130 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE SOUTH CENTRAL PART OF NEBRASKA
      SOUTHERN DAWSON

AT 825 PM THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE MOVING SLOWLY
ACROSS THE SOUTHERN HALF OF DAWSON COUNTY FOR THE PAST TWO TO THREE
HOURS.  HEAVEST RAINFALL HAS BEEN BETWEEN LEXINGTON AND ELM CREEK
NEBRASKA.  LOWLAND AND SMALL STREAM FLASH FLOODING CAN BE EXPECTED
FOR THE NEXT FEW HOURS.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR HAS
BEEN REPORTED.  RESIDENTS SHOULD TAKE IMMEDIATE PRECAUTIONS.  DO NOT
ATTEMPT TO CROSS SWIFTLY FLOWING WATERS BY FOOT OR AUTO.

DO NOT ATTEMPT TO DRIVE OVER A ROAD COVERED BY WATER.  THE ROAD
COULD BE WASHED OUT UNDER THE WATER OR YOUR CAR COULD BE SWEEP
AWAY IF THE WATER IS FLOWING SWIFTLY.

 BW/JS

What forecasters said that day

The local office's own words before this flash flood 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, Aug 14, 7:53 PM CDT, 39 minutes before

NEZ008-013>015-017>019-150145-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE GRAND ISLAND NE
750 PM CDT TUE AUG 14 1990

A LINE OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN WAS SHOWING LITTLE
MOVEMENT IN SOUTHWEST AND SOUTH CENTRAL NEBRASKA THIS EVEING.

AT 740 PM CDT...RADAR SHOWED A 25 MILE WIDE LINE OF THUNDERSTORMS
EXTENDING FROM 15 MILES NORTHWEST OF KEARNEY TO 15 MILES WEST OF MCCOOK.
THE STORMS WERE PRODUCING VERY HEAVY RAIN...GUSTY WINDS OF ARIUND 30
MPH...AND SOME SMALL HAIL.  AS WITH ALL THUNDERSTORMS...DANGEROUS
LIGHTNING WAS ALSO OCCURRING.  THE STORMS WERE MOVING ONLY SLOWLY TO
THE SOUTHWEST...AT LESS THAN 10 MILES AN HOUR.

WITH THE VERY HEAVY RAIN OCCURRING WITH THESE STORMS...SOME FLOODING OF
LOW LYING AREAS IS POSSIBLE...MAINLY ALONG A LINE FROM 20 MILES EAST OF
LEXINGTON...TO 20 MILES NORTH OF MCCOOK.
SULLIVAN

Nearby

Flash Flood Warnings in Nebraska, 1990 Every flash flood warning in 1990

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.