Alert archive / Nebraska / Flash Flood Warnings in 1996

Flash Flood Warning 4, NWS Omaha, NE

May 23, 1996Jefferson County, Nebraska

NWS Omaha, NE issued this flash flood warning at May 23, 1996, 12:39 AM CDT for Jefferson 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
May 23, 1996, 12:39 AM CDT (05:39 UTC)
Expired
May 23, 1996, 6:45 AM CDT
In force
6 hr
Issued by
NWS Omaha, NE
Area
Whole counties

County Jefferson County, NE

The radar

The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 05:42 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, 5.7 hours before the alert went out and 143 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 1996-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1996-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1697 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
501 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 230542
FFWOMA
NEC067-095-133-231145-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1239 AM CDT THU MAY 23 1996
 
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  645 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST NEBRASKA
 
   ...GAGE COUNTY...JEFFERSON COUNTY...PAWNEE COUNTY
 
AT 1235 AM CDT DOPPLER RADAR ESTIMATED THAT TWO TO FOUR INCHES
OF RAIN HAD FALLEN IN JEFFERSON...GAGE AND PAWNEE COUNTIES SINCE
WEDNESDAY EVENING.  MORE HEAVY RAIN WILL OCCUR THROUGH THE NIGHT.
FLOODING OF THE TRIBUTARIES OF THE BIG BLUE RIVER AND LITTLE BLUE
RIVERS IS LIKELY.  FLOODING IS ALSO EXPECTED FOR TURKEY XCREEK IN
PAWNEE COUNTY.
 
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.
 
MILLER

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, May 22, 9:34 PM CDT, 3 hours 5 minutes before
NEZ057>059-069-230300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
930 PM CDT WED MAY 22 1996

TORNADO WATCH NUMBER 414 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES
KEITH...PERKIN@S...CHASE AND LINCOLN.

FOBERT
Special weather statement, May 23, 12:38 AM CDT, 1 minute before
NEZ030-039>044-046>050-060>062-070>072-230600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1235 AM CDT THU MAY 23 1996

TORNADO WATCH NUMBER 416 HAS BEEN CANCELLED FOR THE FOLLOWINGF COUNTIES
VALLEY...GREELEY...BOONE...PLATTE...COLFAX...DODGE...SHERMAN...HOWARD
...NANCE...MERRICK...POLK...BUTLER...BUFFALO...HALL

TORNADO WATCH NUMBER 414 HAS BEEN CANCELLED FOR HAYES...FRONTIER...
DAWSON AND GOSPER

FOBERT

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 7:01 PM CDTSevere Thunderstorm WarningOAXCass, Otoe59 min
May 22, 7:18 PM CDTSevere Thunderstorm WarningOAXGage57 min
May 22, 8:00 PM CDTSevere Thunderstorm WarningOAXPawnee60 min
May 22, 8:07 PM CDTTornado WarningOAXSeward53 min
May 22, 8:09 PM CDTTornado WarningOAXGage, Pawnee36 min
May 22, 8:32 PM CDTTornado WarningOAXLancaster43 min
May 22, 8:42 PM CDTSevere Thunderstorm WarningOAXPawnee48 min
May 22, 9:08 PM CDTTornado WarningOAXCass, Lancaster, Otoe37 min
May 22, 9:38 PM CDTTornado WarningOAXCass, Otoe52 min
May 22, 10:20 PM CDTSevere Thunderstorm WarningOAXButler, Colfax40 min
May 22, 10:36 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders54 min
May 22, 10:44 PM CDTSevere Thunderstorm WarningOAXRichardson61 min
May 22, 10:48 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson57 min
May 22, 11:16 PM CDTSevere Thunderstorm WarningOAXJohnson44 min
May 22, 11:20 PM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy55 min
May 22, 11:20 PM CDTSevere Thunderstorm WarningOAXWashington55 min
May 22, 11:55 PM CDTSevere Thunderstorm WarningOAXJefferson65 min
May 23, 12:09 AM CDTSevere Thunderstorm WarningOAXRichardson21 min
May 23, 12:28 AM CDTSevere Thunderstorm WarningOAXGage62 min
May 23, 12:39 AM CDTFlash Flood WarningOAXGage, Pawnee6 hr
May 23, 1:09 AM CDTSevere Thunderstorm WarningOAXJohnson, Pawnee66 min

Nearby

Flash Flood Warnings in Nebraska, 1996Every flash flood warning in 1996

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.