Alert archive / Nebraska / Flash Flood Warnings in 1990

Flash Flood Warning 10, NWS Omaha, NE

July 25, 1990Lancaster County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jul 25, 1990, 9:21 PM CDT for Lancaster County, Nebraska. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 25, 1990, 9:21 PM CDT (02:21 UTC)
Expired
Jul 26, 1990, 12:15 AM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Whole counties

County Lancaster County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.4 hours before the alert went out and 65 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 1990-07-26Temperature 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 1990-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
3625 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
109 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 KLNK 260221
FFWLNK
NEC109-260515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE LINCOLN NE
921 PM CDT WED JUL 25 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHEAST PART OF NEBRASKA
      LANCASTER...CITY OF LINCOLN

AT 915 PM CDT VERY HEAVY RAINS WERE FALLING ACROSS LANCASTER
COUNTY.  AT 915 PM CDT LINCOLN AIRPORT HAD RECORDED 1.50 INCHES OF
RAIN IN THE PAST HOUR FOR A TOTAL RAINFALL AMOUNT FOR THE AFTERNOON
OF 4.37 INCHES.  THESE RAINS WILL CONTINUE FOR SEVERAL HOURS
CAUSING FLASH FLOODING ACROSS LANCASTER COUNTY.

A FLASH FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
TO ESCAPE RISING WATER MOVE TO HIGHER GROUND.

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 IMMEDIATELY.
MOVE TO HIGHER GROUND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOOD WATERS.  IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY.  MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

 DEMUTH

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 25, 4:01 PM CDT, 5 hours 20 minutes before
NEZ010-020-252230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
345 PM CDT WED JUL 25 1990

...A FLASH FLOOD WATCH HAS BEEN POSTED FOR EAST CENTRAL AND PARTS
OF SOUTH CENTRAL NEBRASKA UNTIL MIDNIGHT...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST NEBRASKA
UNTIL 9 PM CDT...

NUMEROUS THUNDERSTORMS WERE MOVING THOUGH EAST CENTRAL NEBRASKA AT
340 PM CDT.  THE STRONGEST THUNDERSTORMS WERE MOVING THROUGH EASTERN
CASS AND LANCASTER COUNTIES IN THE LINCOLN VICINITY 40 MILES SOUTHWEST
OF OMAHA.

THE THUNDERSTORMS WERE MOVING AT 25 MILES AN HOUR AND THEY SHOULD MOVE
INTO THE OMAHA VICINITY BY 5 PM CDT.  MORE STORMS WILL MOVE WILL MOVE
INTO SAUNDERS AND DODGE COUNTIES ABOUT 30 MILES WEST OF OMAHA.
^
BETWEEN 2 AND 4 INCHES OF RAIN HAD FALLEN IN PARTS OF SAUNDERS AND
DODGE COUNTIES DURING THE DAY.  ADDITIONAL HEAVY RAINFALL MAY PRODUCE
PRODUCE FLASH FLOODING IN THIS AREA.

IF YOU ARE IN THE PATH OF THE THUNDERSTORMS...BE PREPARED FOR VERY
HEAVY RAIN...DANGEROUS LIGHTNING...GUSTY WINDS AND POSSIBLY HAIL.
YOU SHOULD MOVE INTO A STRONG REINFORCED BUILDING UNTIL AFTER THE
STORMS PASS.

IF YOU LIVE IN FLOOD PRONE AREAS...PREPARE TO MOVE TO HIGHER GROUND
IF FL	OODING IS OBSEVERED OR IF A WARNING IS ISSUED.

JOHNSON
Special weather statement, Jul 25, 4:54 PM CDT, 4 hours 27 minutes before
NEZ010-015-252230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
445 PM CDT WED JUL 25 1990

...A FLASH FLOOD WATCH HAS BEEN POSTED FOR EAST CENTRAL AND PARTS
OF SOUTH CENTRAL NEBRASKA UNTIL MIDNIGHT...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST NEBRASKA
UNTIL 9 PM CDT...

AT 435 PM CDT THIS WEDNESDAY AFTERNOON A LINE OF HEAVIER THUNDERSTORMS
REACHED FROM ABOUT 20 MILES WEST OF LINCOLN NE ACROSS PLATTSMOUTH NE
ABOUT 25 MILES SOUTH OF OMAHA TO NEAR ATLANTIC IOWA ABOUT 40 MILES
EAST OF OMAHA NE.  THIS LINE IS DRIFTING ONLY SLOWLY NORTH AND THE
THUNDERSTORMS MOVE NORTHEAST ABOUT 20 MILES PER HOUR.  THE HEAVIEST
THUNDERSTORMS ARE LIKELY TO PRODUCE VERY HEAVY RAIN AND APPEAR TO BE
PRODUCING SOME HAIL THROUGHOUT EAST SEWARD...CENTRAL LANCASTER AND
CASS COUNTIES IN NEBRASKA AND NORTHERN MILLS AND POSSIBLY EASTERN
POTTAWATTAMIE COUNTIES IN IOWA.

RAPID FLOODING IS QUITE POSSIBLE FROM THE STORMS.  A FLASH FLOOD QWATCH
IS IN EFFECT FOR MUCH OF SOUTHEAST AND EAST CENTRAL NEBRASKA UNTIL
MIDNIGHT.  DO NOT ATTEMPT TO CROSS FLOWING WATER ON FOOT OR IN A
VEHICLE.

POWERS
Special weather statement, Jul 25, 5:47 PM CDT, 3 hours 34 minutes before
NEZ009-252330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
540 PM CDT WED JUL 25 1990

AT 540 PM CDT RADAR INDICATED A LINE OF INTENSE THUNDERSTORMS STRETCHING
FROM 20 MILES SOUTH-SOUTHWEST OF NORFOLK NEAR HUMPHREY TO 15 MILES WEST
OF COLUMBUS NEAR GENOA.

THESE STORMS ARE LIKELY PRODUCING STRONG WIND...DANGEROUS LIGHTNING...
HEAVY RAIN AND SOME SMALL HAIL.

OTHER SHOWERS AND THUNDERSTORMS WERE WIDELY SCATTERED ACROSS PARTS OF
NORTH CENTRAL NEBRASKA BUT NONE OF THESE WERE VERY STRONG.
ALL THE SHOWERS AND THUNDERSTORMS ARE MOVING EAST-NORTHEAST AT 15 MPH.

REMEMBER TO TAKE COVER IMMEDIATELY IF THREATENING WEATHER APPROACHES.

KLEFFMAN
Special weather statement, Jul 25, 6:42 PM CDT, 2 hours 39 minutes before
NEZ009-260045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
635 PM CDT WED JUL 25 1990

...FLASH FLOOD WATCH FOR PARTS OF NORTHEAST NEBRASKA UNTIL MIDNIGHT...

AT 635 PM CDT RADAR CONTINUED TO INDICATE STRONG THUNDERSTORMS EXTENDING
FROM 20 MILES NORTHWEST OF NORFOLK SOUTH TO NEAR COLUMBUS.  THESE STORMS ARE
LIKELY PRODUCING STRONG WIND...DANGEROUS LIGHTNING...AND HEAVY RAIN
AS THEY CONTINUE MOVING EAST-NORTHEAST AT 20 MPH.

IF YOU LIVE IN NORTHEAST NEBRASKA YOU SHOULD ALSO BE AWARE OF THE POSSIBILITY
OF FLOODING AS THUNDERSTORMS CONTINUE MOVING ACROSS ALREADY SATURATED GROUND
THROUGH THE EVENING HOURS.  ALSO REMEMBER TO NEVER DRIVE ACROSS FAST MOVING
WATER FOR IT ONLY TAKES A COUPLE OF INCHES OF WATER TO CAUSE HARM TO A
VEHICLE AND ITS OCCUPANTS.

KLEFFMAN
Special weather statement, Jul 25, 7:38 PM CDT, 1 hour 43 minutes before
NEZ009-260130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
730 PM CDT WED JUL 25 1990

...FLASH FLOOD WATCH FOR PARTS OF NORTHEAST NEBRASKA UNTIL MIDNIGHT...

AT 735 PM CDT RADAR CONTINUED TO INDICATE SHOWERS AND THUNDERSTORMS FROM
60 MILES NORTHEAST OF NORFOLK TO JUST WEST OF NORFOLK AND THEN FURTHER
SOUTHWEST INTO SOUTHCENTRAL NEBRASKA.  THE STRONGEST STORMS WHICH ARE
PRODUCING HEAVY RAIN...DANGEROUS LIGHTNING AND GUSTY WIND WERE LOCATED
EAST OF NORFOLK SOUTH INTO COLFAX COUNTY OR 15 MILES EAST OF COLUMBUS.

AS OF 7 PM CDT RAINFALL REPORTS ACROSS PLATTE AND COLFAX COUNTIES HAVE
BEEN GENERALLY IN THE 1 TO 2 IN RANGE.  HOWEVER THE POSSIBILITY OF FLOODING
WILL CONTINUE THROUGH THE REMAINDER OF THE EVENING HOURS AS SHOWERS AND
THUNDERSTORMS CONTINUE MOVING ACROSS THESE AREAS.

KLEFFMAN
Special weather statement, Jul 25, 8:41 PM CDT, 40 minutes before
NEZ009-260230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
835 PM CDT WED JUL 25 1990

...FLASH FLOOD WATCH FOR PARTS OF NORTHEAST NEBRASKA UNTIL MIDNIGHT...

AT 835 PM CDT RADAR CONTINUED TO INDICATE SHOWERS AND THUNDERSTORMS
EXTENDING MAINLY EAST OF A LINE FROM 40 MILES NORTHEAST OF NORFOLK TO
35 MILES WEST OF COLUMBUS THEN ON FURTHER SOUTHWEST INTO SOUTHCENTRAL
NEBRASKA.  MOST OF THE RAIN IN NORTHEAST NEBRASKA WAS OF THE LIGHT TO
MODERATE VARIETY AND A RECENT CHECK OF AREA STREAMS AND RIVERS INDICATES
NO FLOODING OCCURING...ONLY SOME MINOR STREET FLOODING WAS REPORTED BY
THE COLUMBUS POLICE DEPARTMENT.

HOWEVER IF YOU SHOULD HAPPEN TO ENCOUNTER HIGH WATER...ESPECIALLY zWHILE
DRIVING...REMEMBER THAT IT ONLY TAKES A SMALL AMOUNT OF MOVING WATER TO
LIFT A VEHICLE OFF A ROADWAY CAUSING HARM TO THE VEHICLE AND ITS
OCCUPANTS.
KLEFFMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 8:12 PM CDTFlash Flood WarningOAXSaline, Seward3 hr
Jul 25, 9:59 PM CDTFlash Flood WarningOAXSaunders4 hr

Nearby

Flash Flood Warnings in Nebraska, 1990Every flash flood warning in 1990

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.