Alert archive / Nebraska / Flash Flood Warnings in 2004

Flash Flood Warning 7, NWS North Platte, NE

July 27, 2004Thomas County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jul 27, 2004, 11:13 PM CDT for Thomas County, Nebraska. It was in force for 3 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: Jul 27, 2004, 11:13 PM CDT (04:13 UTC)
Expired: Jul 28, 2004, 2:15 AM CDT
In force: 3 hr
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Thomas County, NE

The radar

The North Platte radar (KLNX), 8 km from the middle of the area, began a volume at 04:14 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.2 hours before the alert went out and 92 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: 2182 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLBF 280416
FFWLBF
NEC171-280715-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1113 PM CDT TUE JUL 27 2004

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THOMAS COUNTY IN NORTH CENTRAL NEBRASKA
  THIS INCLUDES THE CITY OF THEDFORD

* UNTIL 215 AM CDT

* AT 1104 PM CDT(1004 PM MDT)...THE PUBLIC REPORTED WATER RISING     
  FROM EXCESSIVE RAINFALL FROM THUNDERSTORMS ALONG A LINE EXTENDING 
  FROM 19 MILES SOUTHEAST OF THEDFORD TO 14 MILES SOUTH OF 
  SENECA...OR ALONG A LINE EXTENDING FROM 19 MILES SOUTHEAST OF 
  THEDFORD TO 16 MILES SOUTHEAST OF MULLEN...MOVING SOUTH AT 15 MPH.

* THUNDERSTORMS PRODUCING FLASH FLOODING WILL BE OVER... 
  RURAL THOMAS COUNTY THROUGH 1120 PM CDT INCLUDING THE CITY OF 
  THEDFORD

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...AND HIGHWAYS. ADDITIONALLY...COUNTRY ROADS AND 
FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING 
AREAS ARE SUBJECT TO FLOODING.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN NORTH
PLATTE.

LAT...LON 4209 10025 4207 10084 4175 10080 4175 10029

$$

TLK

2 follow-up statements

000 
WSUS73 KLBF 280443
FFSLBF
NEC171-280715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1140 PM CDT TUE JUL 27 2004

...FLASH FLOOD WARNING CONTINUES FOR THOMAS COUNTY UNTIL 215 CDT...

AT 1112 PM CDT...A TRAINED SPOTTER REPORTED WATER FLOWING 6 INCHES 
OVER A PORTION OF THE ROAD IN THEDFORD. THE LINE OF THUNDERSTORMS 
THAT PRODUCED EXCESSIVE RAINFALL AMOUNTS EXCEEDING 3 INCHES IN SOME 
LOCALES WILL BE MOVING SOUTH ACROSS SOUTHERN THOMAS COUNTY THROUGH 
1230 AM CDT. HOURLY RAINFALL AMOUNTS OF AN ADDITIONAL 1 TO 2 INCHES 
OF RAINFALL IS POSSIBLE BEFORE THE RAIN ENDS AS THUNDERSTORMS MOVE 
OUT OF THE COUNTY. 

THE EXCESSIVE RAINS WILL CONTINUE TO PRODUCE INCREASED RUNOFF WITH 
FLOODING OF SMALL CREEKS AND STREAMS...AND HIGHWAYS. ADDITIONALLY 
...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS 
AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE 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 QUICKLY.
MOVE TO HIGHER GROUND.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN NORTH
PLATTE.

LAT...LON 4207 10028 4206 10027 4192 10027 4191 10028
      4176 10029 4176 10079 4207 10083 4208 10065
      4208 10064

$$

TLK

000 
WSUS73 KLBF 280505
FFSLBF
NEC171-280715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1200 AM CDT WED JUL 28 2004

...FLASH FLOOD WARNING CONTINUES FOR THOMAS COUNTY UNTIL 215 CDT...

AT 1157 PM CDT...SHERIFF RANDY BARNES REPORTED WATER HAD RECEDED IN 
THE CITY OF THEDFORD...WITH THE CULVERTS HANDLING THE EXCESSIVE 
RUNOFF. NO ADDITIONAL FLOODING WAS NOTED WITH MOTORISTS URGED TO USE 
CAUTION WHEN TRAVELING COUNTY ROADS. THE LINE OF THUNDERSTORMS THAT 
GENERATED THE EXCESSIVE RAINS WILL CONTINUE TO WEAKEN AND MOVE 
SOUTHEAST THROUGH SOUTHERN THOMAS COUNTY THROUGH 115 AM CDT. 
ADDITIONAL RAINFALL WILL BE UNDER A HALF INCH OVER NORTHERN THOMAS 
COUNTY... WITH UP TO AN ADDITIONAL INCH ACROSS THE SOUTHERN PORTION 
OF THE COUNTY.  

THE EXCESSIVE RUNOFF MAY CONTINUE TO GENERATE A RISE ON SMALL CREEKS 
AND STREAMS...AND OTHER LOW LYING AREAS THAT ARE SUBJECT TO FLOODING.

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE 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 QUICKLY.
MOVE TO HIGHER GROUND.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN NORTH
PLATTE.

LAT...LON 4207 10028 4206 10027 4192 10027 4191 10028
      4176 10029 4176 10079 4207 10083 4208 10065
      4208 10064

$$

TLK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:59 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Grant	61 min
Jul 27, 8:06 PM CDT	Severe Thunderstorm Warning	LBF	Hooker	54 min
Jul 27, 9:01 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	44 min
Jul 27, 9:03 PM CDT	Severe Thunderstorm Warning	LBF	Hooker	57 min
Jul 27, 10:38 PM CDT	Severe Thunderstorm Warning	LBF	Hooker	52 min

Nearby

Flash Flood Warnings in Nebraska, 2004 Every flash flood warning in 2004

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.