Alert archive / Nebraska / Flash Flood Warnings in 1997

Flash Flood Warning 8, NWS Omaha, NE

September 2, 19975 counties in Nebraska

NWS Omaha, NE issued this flash flood warning at Sep 2, 1997, 2:31 AM CDT for 5 counties in Nebraska. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 2, 1997, 2:31 AM CDT (07:31 UTC)
Expired
Sep 2, 1997, 6:00 AM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Dodge County, NE, Douglas County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 3 km from the middle of the area, began a volume at 07:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.5 hours before the alert went out and 3 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 00:00Z on 1997-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1781 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 00:00Z on 1997-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.193958Sfc1 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
1781 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1077 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 020732
FFWOMA
NEC053-055-153-155-177-021100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
231 AM CDT TUE SEP 2 1997

* FLASH FLOOD WARNING FOR
  DODGE COUNTY IN EAST CENTRAL NEBRASKA
  WASHINGTON COUNTY IN EAST CENTRAL NEBRASKA
  SAUNDERS COUNTY IN EAST CENTRAL NEBRASKA
  DOUGLAS COUNTY IN EAST CENTRAL NEBRASKA
  SARPY COUNTY IN EAST CENTRAL NEBRASKA

* UNTIL 600 AM CDT
 
* SOME STREAMS AFFECTED
  RAWHIDE CREEK
  PAPILLION CREEK

* CAUSE AND EFFECT
  HEAVY RAIN IN EXCESS OF 3 INCHES HAS FALLEN SINCE
  LATE MONDAY EVENING FROM NORTHWEST OF FREMONT TO THE OMAHA
BELLEVUE  AREA.  ADDITIONAL RAINFALL OF ONE TO TWO INCHES IS
POSSIBLE AS MORE THUNDERS$TORMS MOVE THROUGH DOUGLAS AND SARPY
COUNTY THROUGH 4AM.
 
IF FLASH FLOODING IS OBSERVED...ACT QUICKLY.  MOVE TO ESCAPE FLOOD
WATERS.  DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS
RISING.

SKERRITT

Nearby

Flash Flood Warnings in Nebraska, 1997Every flash flood warning in 1997

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; radar from the NEXRAD Level II archive.