Alert archive / Nebraska / Flash Flood Warnings in 1997

Flash Flood Warning 4, NWS Omaha, NE

June 29, 1997Madison County, Stanton County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 29, 1997, 2:30 PM CDT for Madison County, Stanton County, 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
Jun 29, 1997, 2:30 PM CDT (19:30 UTC)
Expired
Jun 29, 1997, 5:30 PM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Madison County, NE, Stanton County, NE

The radar

The Omaha radar (KOAX), 108 km from the middle of the area, began a volume at 19:31 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 12:00Z, 7.5 hours before the alert went out and 108 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 1997-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1803 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 1997-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
1803 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
732 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 291931
FFWOMA
NEC119-167-292230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
230 PM CDT SUN JUN 29 1997

* FLASH FLOOD WARNING FOR
  MADISON COUNTY - IN NORTHEASTERN NEBRASKA
  STANTON COUNTY - IN NORTHEASTERN NEBRASKA

* UNTIL 530 PM CDT
 
* SOME STREAMS AFFECTED
 LOCAL CREEKS IN EASTERN MADISON AND WESTERN STANTON COUNTIES

* CAUSE AND EFFECT
  RADAR INDICATES EXCESSIVE RAINFALL HAS OCCURRED FROM NORTHEAST
MADISON INTO NORTHWEST STANTON COUNTY WITH ESTIMATES OF MORE THAN
2.5 INCHES SINCE 100 PM.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
QUICKLY.  MOVE TO HIGHER GROUND.

CONSIDERABLE STEET FLOODING WAS REPORTED BY NORFOLK POLICE IN NORFOLK.

CHERMOK

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, Jun 29, 11:35 AM CDT, 2 hours 55 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-301200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1135 AM CDT SUN JUN 29 1997

...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA...

SPOTTER ACTION...
STORM SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT
ACROSS EASTERN NEBRASKA AND SOUTHWEST IOWA.

DISCUSSION...
A WARM AND UNSTABLE AIRMASS CONTINUED TO COVER EASTERN NEBRASKA AND
SOUTHWEST IOWA.  SEVERAL WEAK BOUNDARIES FROM EARLIER SHOWERS AND
THUNDERSTORMS COMBINED WITH AN UPPER LEVEL DISTURBANCE COULD TRIGGER
REDEVELOPMENT OF THUNDERSTORMS JUST ABOUT ANYWHERE ACROSS THE AREA
LATER THIS AFTERNOON.  IN ADDITION...LOW PRESSURE EXPECTED TO DEEPEN
OVER WESTERN SOUTH DAKOTA TONIGHT WILL INCREASE LOW LEVEL SOUTH WINDS
ACROSS THE CENTRAL PLAINS.  THIS WOULD FEED MOIST AND UNSTABLE AIR
INTO ANY THUNDERSTORMS THAT DEVELOP WEST OF THE AREA THIS AFTERNOON
...POSSIBLY CAUSING THE THUNDERSTORMS TO BECOME MORE WIDESPREAD TONIGHT
AS THEY MOVED EAST.

THE PRIMARY THREAT FROM THE THUNDERSTORMS IS HEAVY RAIN AND DAMAGING
WINDS.  HOWEVER...SOME OF THE STRONGER STORMS COULD PRODUCE LARGE HAIL
...ESPECIALLY FROM LATE AFTERNOON THROUGH LATE EVENING.

CHERMOK
Special weather statement, Jun 29, 11:41 AM CDT, 2 hours 49 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-301200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1135 AM CDT SUN JUN 29 1997

...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA...

SPOTTER ACTION...
STORM SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT
ACROSS EASTERN NEBRASKA AND SOUTHWEST IOWA.

DISCUSSION...
A WARM AND UNSTABLE AIRMASS CONTINUED TO COVER EASTERN NEBRASKA AND
SOUTHWEST IOWA.  SEVERAL WEAK BOUNDARIES FROM EARLIER SHOWERS AND
THUNDERSTORMS COMBINED WITH AN UPPER LEVEL DISTURBANCE COULD TRIGGER
REDEVELOPMENT OF THUNDERSTORMS JUST ABOUT ANYWHERE ACROSS THE AREA
LATER THIS AFTERNOON.  IN ADDITION...LOW PRESSURE EXPECTED TO DEEPEN
OVER WESTERN SOUTH DAKOTA TONIGHT WILL INCREASE LOW LEVEL SOUTH WINDS
ACROSS THE CENTRAL PLAINS.  THIS WOULD FEED MOIST AND UNSTABLE AIR
INTO ANY THUNDERSTORMS THAT DEVELOP WEST OF THE AREA THIS AFTERNOON
...POSSIBLY CAUSING THE THUNDERSTORMS TO BECOME MORE WIDESPREAD TONIGHT
AS THEY MOVED EAST.

THE PRIMARY THREAT FROM THE THUNDERSTORMS IS HEAVY RAIN AND DAMAGING
WINDS.  HOWEVER...SOME OF THE STRONGER STORMS COULD PRODUCE LARGE HAIL
...ESPECIALLY FROM LATE AFTERNOON THROUGH LATE EVENING.

CHERMOK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 1:58 PM CDTSevere Thunderstorm WarningOAXMadison, Stanton62 min
Jun 29, 3:14 PM CDTSevere Thunderstorm WarningOAXDodge46 min
Jun 29, 3:21 PM CDTTornado WarningOAXDodge49 min
Jun 29, 3:41 PM CDTSevere Thunderstorm WarningOAXWashington49 min

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.