Alert archive / Nebraska / Flash Flood Warnings in 2003

Flash Flood Warning 13, NWS Omaha, NE

June 24, 2003Cedar County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 24, 2003, 12:05 AM CDT for Cedar 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 outline as issued.

The facts

Issued: Jun 24, 2003, 12:05 AM CDT (05:05 UTC)
Expired: Jun 24, 2003, 6:00 AM CDT
In force: 6 hr
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Cedar County, NE

The radar

The Sioux Falls radar (KFSD), 112 km from the middle of the area, began a volume at 05:06 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

Aberdeen, SD (KABR), launched 00:00Z, 5.1 hours before the alert went out and 269 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1534 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KOAX 240510
FFWOAX
NEC027-241100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA NE
1205 AM CDT TUE JUN 24 2003

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CEDAR COUNTY IN NORTHEAST NEBRASKA

* UNTIL 600 AM CDT

* AT 1205 AM CDT...RADAR INDICATED VERY HEAVY RAIN CONTINUING
  ACROSS CEDAR COUNTY. RADAR ESTIMATED RAINFALL OF 4 TO 6 INCHES
  HAS OCCURRED SO FAR TONIGHT WITH ADDITIONAL THUNDERSTORMS AND
  MORE HEAVY RAIN EXPECTED INTO EARLY TUESDAY MORNING.

SOME LOCATIONS AFFECTED INCLUDE...BELDEN...COLERIDGE...FORDYCE...
HARTINGTON...LAUREL...OBERT...

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. IN ADDITION...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER 
LOW LYING AREAS MAY BE SUBJECT TO FLASH FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY AND
MOVE TO HIGHER GROUND.

LAT...LON 4277 9701 4237 9704 4245 9748 4285 9749

$$

FOBERT

1 follow-up statement

000 
WGUS73 KOAX 240628
FFSOAX
NEC027-241115-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
120 AM CDT TUE JUN 24 2003

...A FLASH FLOOD WARNING CONTINUES FOR CEDAR COUNTY UNTIL 600 AM 
CDT...

AT 114 AM CDT...WATER WAS REPORTED OVER THE ROAD ON HIGHWAY 57
BETWEEN COLERIDGE AND HARTINGTON AND SEVERAL COUNTY ROADS WERE
ALSO UNDER WATER.

RADAR INDICATED THAT THUNDERSTORMS HAD MOVED NORTH INTO SOUTH
DAKOTA BUT ANOTHER AREA OF RAIN WAS APPROACHING THE AREA FROM THE 
SOUTH. SOME ADDITIONAL RAINFALL IS LIKELY THROUGH 300 AM BUT
IT APPEARS THAT THE HEAVIER RAIN WILL STAY NORTH OF THE MISSOURI 
RIVER UNLESS NEW STORMS DEVELOP.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF ROAD AND STREAM FLOODING. DO NOT DRIVE INTO FLOODED AREAS.
MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS.

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. AS LITTLE AS SIX
INCHES OF WATER MAY CAUSE YOU TO LOSE CONTROL OF YOUR VEHICLE. THIS
INCLUDES PICKUP TRUCKS AND SPORT UTILITY VEHICLES.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMENENT...OR HAS A HIGH
PROBABILITY OF OCCURRING.

LAT...LON 4277 9701 4238 9703 4246 9748 4284 9750

$$

FOBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 8:08 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	22 min
Jun 23, 8:31 PM CDT	Severe Thunderstorm Warning	OAX	Knox	44 min
Jun 23, 8:49 PM CDT	Tornado Warning	OAX	Antelope	26 min
Jun 23, 9:00 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	45 min
Jun 23, 9:09 PM CDT	Tornado Warning	OAX	Cedar	51 min
Jun 23, 9:14 PM CDT	Tornado Warning	OAX	Antelope, Knox	31 min
Jun 23, 9:36 PM CDT	Tornado Warning	OAX	Antelope	24 min
Jun 23, 9:45 PM CDT	Tornado Warning	OAX	Knox	30 min
Jun 23, 10:15 PM CDT	Tornado Warning	OAX	Cedar	30 min
Jun 23, 10:41 PM CDT	Severe Thunderstorm Warning	OAX	Platte	64 min
Jun 23, 10:45 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	30 min
Jun 23, 10:46 PM CDT	Severe Thunderstorm Warning	OAX	Platte	59 min
Jun 23, 11:04 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	26 min
Jun 23, 11:22 PM CDT	Severe Thunderstorm Warning	OAX	Knox	38 min
Jun 23, 11:32 PM CDT	Flash Flood Warning	OAX	Knox	6 hr
Jun 24, 12:00 AM CDT	Severe Thunderstorm Warning	OAX	Knox	60 min
Jun 24, 12:04 AM CDT	Tornado Warning	OAX	Cedar	41 min
Jun 24, 5:07 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	38 min
Jun 24, 5:44 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	31 min
Jun 24, 6:09 PM CDT	Tornado Warning	OAX	Cedar	36 min

Nearby

Flash Flood Warnings in Nebraska, 2003 Every flash flood warning in 2003

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.