Alert archive / Nebraska / Flash Flood Warnings in 1997

Flash Flood Warning 1, NWS Omaha, NE

June 21, 1997Burt County, Cuming County, Dodge County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 21, 1997, 12:08 AM CDT for Burt County, Cuming County, Dodge County, Nebraska. It was in force for 6 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 21, 1997, 12:08 AM CDT (05:08 UTC)
Expired
Jun 21, 1997, 6:05 AM CDT
In force
6 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Burt County, NE, Cuming County, NE, Dodge County, NE

The radar

The Omaha radar (KOAX), 55 km from the middle of the area, began a volume at 05:10 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, 5.1 hours before the alert went out and 55 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 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5994 joules per kilogram.LCLEL10008507005003002001001 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 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
5994 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1151 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
4.8
Supercell composite
25.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 210509
FFWOMA
NEC034-039-053-211105-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1208 AM CDT SAT JUN 21 1997

* FLASH FLOOD WARNING FOR
  SOUTHERN CUMING COUNTY - IN NORTHEASTERN NEBRASKA
  DODGE COUNTY - IN EAST CENTRAL NEBRASKA
  BURT COUNTY - IN NORTHEASTERN NEBRASKA

* UNTIL 605 AM CDT
 
* SOME STREAMS AFFECTED
  PEBBLE CREEK
  MAPLE CREEK
  LOGAN CREEK


* CAUSE AND EFFECT
  VERY HEAVY RAIN HAS FALLEN IN THESE AREAS THIS EVENING WITH RADAR
  ESTMATES OF 2 TO 6 INCHES ACROSS THE AREA.

  ADDITIONAL HEAVY RAIN IS LIKELY THROUGH THE EARLY MORNING HOURS.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE
ROADWAY.  THE WATER DEPTVH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
QUICKLY.  MOVE TO HIGHER GROUND.



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, Jun 20, 10:14 PM CDT, 1 hour 54 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-211200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1015 PM CDT FRI JUN 20 1997

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

SPOTTER ACTION...
SPOTTER ACTIVITY WILL CONTINUE TO BE NEEDED IN EASTERN NEBRASKA AND
WESTERN IOWA TONIGHT AS A TORNADO WATCH CONTINUES IN EFFECT FOR MUCH OF
EASTERN AND CENTRAL NEBRASKA UNTIL 2 AM CDT.

DISCUSSION...
A SQUALL LINE IN CENTRAL NEBRAKSA FROM BURWELL SOUTH THROUGH THE BROKEN
BOW AREA SOUTHWEST TOWARD LEXINGTON WILL CONTINUE TO MOVE EAST TONIGHT
INTO THE TORNADO WATCH AREA.  DAMAGING WINDS...TORNADOES...AND LARGE
HAIL WILL BE POSSIBLE ALONG PARTS OF THIS LINE AS IT MOVES INTO EASTERN
NEBRASKA FROM 11 PM TO 2 AM CDT.  SEVERE WEATHER WILL ALSO BE POSSIBLE
IN ADVANCE OF THE LINE.  SOME STORMS COULD PRODUCE VERY HEAVY RAINS AND
LOWLAND FLOODING.  THIS IjS A DANGEROUS WEATHER PATTERN AND RESIDENTS OF
EASTERN NEBRASKA AND WESTERN IOWA SHOULD REMAIN AT A HIGH DEGREE OF
ALERT.

BYRD
Special weather statement, Jun 20, 10:15 PM CDT, 1 hour 53 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-211200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1015 PM CDT FRI JUN 20 1997

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

SPOTTER ACTION...
SPOTTER ACTIVITY WILL CONTINUE TO BE NEEDED IN EASTERN NEBRASKA AND
WESTERN IOWA TONIGHT AS A TORNADO WATCH CONTINUES IN EFFECT FOR MUCH OF
EASTERN AND CENTRAL NEBRASKA UNTIL 2 AM CDT.

DISCUSSION...
A SQUALL LINE IN CENTRAL NEBRAKSA FROM BURWELL SOUTH THROUGH THE BROKEN
BOW AREA SOUTHWEST TOWARD LEXINGTON WILL CONTINUE TO MOVE EAST TONIGHT
INTO THE TORNADO WATCH AREA.  DAMAGING WINDS...TORNADOES...AND LARGE
HAIL WILL BE POSSIBLE ALONG PARTS OF THIS LINE AS IT MOVES INTO EASTERN
NEBRASKA FROM 11 PM TO 2 AM CDT.  SEVERE WEATHER WILL ALSO BE POSSIBLE
IN ADVANCE OF THE LINE.  SOME STORMS COULD PRODUCE VERY HEAVY RAINS AND
LOWLAND FLOODING.  THIS IS A DANGEROUS WEATHER PATTERN AND RESIDENTS OF
EASTERN NEBRASKA AND WESTERN IOWA SHOULD REMAIN AT A HIGH DEGREE OF
ALERT.

BYRD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 7:08 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders47 min
Jun 20, 7:31 PM CDTSevere Thunderstorm WarningOAXButler, Colfax49 min
Jun 20, 7:35 PM CDTSevere Thunderstorm WarningOAXBurt, Washington50 min
Jun 20, 7:54 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders46 min
Jun 20, 8:25 PM CDTSevere Thunderstorm WarningOAXBurt50 min
Jun 20, 8:35 PM CDTSevere Thunderstorm WarningOAXThurston50 min
Jun 20, 8:43 PM CDTSevere Thunderstorm WarningOAXCuming, Dodge47 min
Jun 20, 8:48 PM CDTSevere Thunderstorm WarningOAXBoone62 min
Jun 20, 9:12 PM CDTSevere Thunderstorm WarningOAXAntelope63 min
Jun 20, 9:24 PM CDTSevere Thunderstorm WarningOAXCuming, Stanton51 min
Jun 20, 9:40 PM CDTSevere Thunderstorm WarningOAXMadison, Pierce50 min
Jun 20, 10:09 PM CDTTornado WarningOAXCuming51 min
Jun 20, 10:56 PM CDTSevere Thunderstorm WarningOAXBurt64 min
Jun 20, 11:22 PM CDTTornado WarningOAXDodge48 min
Jun 20, 11:42 PM CDTSevere Thunderstorm WarningOAXButler, Seward58 min
Jun 20, 11:48 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Lancaster, Saline62 min
Jun 21, 12:17 AM CDTSevere Thunderstorm WarningOAXSaunders63 min
Jun 21, 1:05 AM CDTSevere Thunderstorm WarningOAXCass, Sarpy60 min
Jun 21, 1:11 AM CDTTornado WarningOAXSarpy34 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.