Alert archive / Nebraska / Flash Flood Warnings in 1997

Flash Flood Warning 7, NWS Omaha, NE

July 10, 1997Saline County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jul 10, 1997, 8:50 AM CDT for Saline County, Nebraska. It was in force for 4 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
Jul 10, 1997, 8:50 AM CDT (13:50 UTC)
Expired
Jul 10, 1997, 12:45 PM CDT
In force
4 hr
Issued by
NWS Omaha, NE
Area
Whole counties

County Saline County, NE

The radar

The Omaha radar (KOAX), 110 km from the middle of the area, began a volume at 13:53 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, 1.8 hours before the alert went out and 110 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 1997-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 729 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 1997-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939Sfc1 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
729 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
536 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
82 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 101351
FFWOMA
NEC151-101745-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
850 AM CDT THU JUL 10 1997
 
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1245 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST NEBRASKA
 
   ...SALINE COUNTY
 
FLASH FLOODING HAS BEEN REPORTED AROUND WILBER IN EAST CENTRAL SALINE
COUNTY AT 845 AM CDT. RAINFALL OF AROUND 5 INCHES HAS BEEN REPORTED IN
THE WILER AREA SO FAR THIS MORNING WITH RADAR SHOWING ANOTHER AREA OF
HEAVY RAINFALL AROUND FRIEND IN NORTHERN SALINE COUNTY.
 
ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE LIKELY THROUGH 10 AM CDT.
 
 
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 BY AUTO.
 
 
&
FOBERT

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, Jul 10, 5:15 AM CDT, 3 hours 35 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-111200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
515 AM CDT THU JUL 10 1997

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

SPOTTER ACTION...
STORM SPOTTER ACTIVATION MAY BE NEEDED TODAY OR TNIGHT.

DISCUSSION...
LITTLE CHANGE IN THE WEATHER PATTERN IS EXPECTED TODAY.  A DISTURBANCE
MOVING ACROSS EASTERN NEBRASKA THIS MORNING IS PRODUCING SCATTERED
THUNDERSTORMS WITH HEAVY RAIN AND HAIL THE PRIMARY WEATHER THREATS. THE
STORMS WILL GRADUALLY WEAKEN THIS MORNING AS THE LOW LEVEL JET SUBSIDE
AND THE UPPER LEVEL SYSTEM MOVEES NORTHEAST.  WITH OUTFLOW BOUNDARIES
AND A NEARLY STATIONARY FRONT OVER THE AREA...THUNDERSTORMS
MAY REDEVELOP THIS AFTERNOON WITH SOME OF THEM POSSIBLY BECOMING
SEVERE.  TONIGHT...THE LOW LEVEL JET WILL AGAIN DEVELOP WITH MORE
THUNDERSTORMS DEVELOPING.

ZAPOTOCNY
Special weather statement, Jul 10, 5:22 AM CDT, 3 hours 28 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-111200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
515 AM CDT THU JUL 10 1997

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

SPOTTER ACTION...
STORM SPOTTER ACTIVATION MAY BE NEEDED TODAY OR TNIGHT.

DISCUSSION...
LITTLE CHANGE IN THE WEATHER PATTERN IS EXPECTED TODAY.  A DISTURBANCE
MOVING ACROSS EASTERN NEBRASKA THIS MORNING IS PRODUCING SCATTERED
THUNDERSTORMS WITH HEAVY RAIN AND HAIL THE PRIMARY WEATHER THREATS. THE
STORMS WILL GRADUALLY WEAKEN THIS MORNING AS THE LOW LEVEL JET SUBSIDE
AND THE UPPER LEVEL SYSTEM MOVEES NORTHEAST.  WITH OUTFLOW BOUNDARIES
AND A NEARLY STATIONARY FRONT OVER THE AREA...THUNDERSTORMS
MAY REDEVELOP THIS AFTERNOON WITH SOME OF THEM POSSIBLY BECOMING
SEVERE.  TONIGHT...THE LOW LEVEL JET WILL AGAIN DEVELOP WITH MORE
THUNDERSTORMS DEVELOPING.

ZAPOTOCNY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 8:38 AM CDTFlash Flood WarningOAXGage4 hr

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.