Alert archive / Nebraska / Flash Flood Warnings in 1992

Flash Flood Warning 19, NWS Omaha, NE

September 5, 1992Nemaha County, Nebraska

NWS Omaha, NE issued this flash flood warning at Sep 5, 1992, 5:38 PM CDT for Nemaha County, Nebraska. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 5, 1992, 5:38 PM CDT (22:38 UTC)
Expired
Sep 5, 1992, 9:45 PM CDT
In force
4 hr
Issued by
NWS Omaha, NE
Area
Whole counties

County Nemaha County, NE

The nearest sounding before it

Omaha, NE (KOVN), launched 12:00Z, 10.6 hours before the alert went out and 112 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, Omaha, NE at 12:00Z on 1992-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 514 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 12:00Z on 1992-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 square meters per square second.19395878Sfc1 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
514 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

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 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, Sep 5, 2:21 PM CDT, 3 hours 17 minutes before
NEZ010-020-IAZ080-090-091-052130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
220 PM CDT SAT SEP 5 1992

AT 200 PM CDT A LINE OF THUNDERSTORMS HAD STRENGTHENED OVER EXTREME
EASTERN NEBRASKA.  THE LINE WAS LOCATED FROM JUST WEST OF  FREMONT...OR
30 MILES NORTHWEST OF OMAHA...TO ONAWA IOWA...OR 50 MILES NORTH OF
OMAHA.  THE STRONGEST STORMS WERE LOCATED OVER BURT COUNTY...OR 40 MILES
NORTH OF OMAHA...JUST EAST OF LYONS...OAKLAND...AND SCRIBNER.

THE STORMS WERE MOVING TO THE EAST NORTHEAST AT 25 MPH.  THE TOWNS OF
DECATUR AND TEKAMAH WILL HAVE SOME HEAVY RAIN SHOWERS...GUSTY WINDS...
AND POSSIBLY SMALL HAIL AFTER 230 PM AS THESE STORMS PASS THROUGH.

ANDERSON

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 4:23 PM CDTSevere Thunderstorm WarningOAXNemaha52 min
Sep 5, 5:05 PM CDTSevere Thunderstorm WarningOAXCass55 min
Sep 5, 5:16 PM CDTTornado WarningOAXCass29 min
Sep 5, 5:20 PM CDTSevere Thunderstorm WarningOAXNemaha, Richardson55 min
Sep 5, 6:08 PM CDTFlash Flood WarningOAXPawnee4 hr
Sep 5, 6:08 PM CDTSevere Thunderstorm WarningOAXPawnee6 hr
Sep 5, 6:14 PM CDTFlash Flood WarningOAXRichardson4 hr
Sep 5, 5:37 PM CDTSevere Thunderstorm WarningOAXMills38 min

Nearby

Flash Flood Warnings in Nebraska, 1992Every flash flood warning in 1992

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.