Alert archive / Nebraska / Flash Flood Warnings in 2007

Flash Flood Warning 37, NWS North Platte, NE

June 13, 2007Perkins County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jun 13, 2007, 12:16 AM MDT for Perkins County, Nebraska. It took effect at Jun 13, 2007, 12:21 AM MDT. It was in force for 84 min. 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 13, 2007, 12:16 AM MDT (06:16 UTC)
In effect from
Jun 13, 2007, 12:21 AM MDT
Expired
Jun 13, 2007, 1:45 AM MDT
In force
84 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Perkins County, NE

The radar

The North Platte radar (KLNX), 152 km from the middle of the area, began a volume at 06:15 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, 6.3 hours before the alert went out and 93 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, N. Platte/Lee Bi, NE at 00:00Z on 2007-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2007-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
51 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLBF 130621
FFWLBF
NEC135-130745-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1216 AM MDT WED JUN 13 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN PERKINS COUNTY IN SOUTHWEST NEBRASKA...
  THIS INCLUDES THE CITY OF GRANT...

* UNTIL 145 AM MDT

* AT 1211 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED FLASH FLOODING WILL LIKELY DEVELOP FROM A CLUSTER OF 
  SCATTERED THUNDERSTORMS WHICH WILL TRACK NORTH AT 20 MPH ACROSS 
  AREAS ALREADY WET OR FLOODED FROM EARLIER HEAVY RAINFALL.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILD 
  HORSE SPRING...BRANDON...VENANGO AND GRANT. THIS INCLUDES HIGHWAY 
  23 WEST OF GRANT.

ADDITIONAL RAINFALL OF 1/2 TO 1 INCH IS LIKELY IN THE WARNED AREA.

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

FLOOD WATERS ARE MOVING DOWN SPRING CREEK AND SAND CREEK FROM 
BRANDON AND VENANGO SOUTH TO THE CHASE COUNTY LINE. FLOODING WILL 
ALSO LIKELY DEVELOP NORTH OF HIGHWAY 23 TO THE KEITH COUNTY LINE. 
HIGHWAY 23 MAY BECOME FLOODED FOR A TIME AS THE HEAVY SHOWERS AND 
THUNDERSTORMS MOVE THROUGH.

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.

LAT...LON 4070 10204 4071 10166 4099 10167 4099 10204

$$

CDC
2 follow-up statements
000 
WGUS73 KLBF 130706
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
201 AM CDT WED JUN 13 2007

NEC135-130745-
PERKINS NE-
101 AM MDT WED JUN 13 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 AM MDT FOR
WESTERN PERKINS COUNTY...

AT 1254 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR THE CLUSTER 
OF THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EXITED WESTERN 
PERKINS COUNTY. THE THREAT OF ADDITIONAL FLOODING WILL DECREASE 
THROUGH 145 AM MDT. 

THE FLASH FLOOD WARNING CONTINUES IN EFFECT UNTIL 145 AM MDT FOR 
WESTERN PERKINS COUNTY TO ALLOW ANY FLOODING WHICH DEVELOPED TO 
SUBSIDE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILD HORSE 
SPRING...BRANDON...VENANGO AND GRANT. THIS INCLUDES HIGHWAY 23 WEST 
OF GRANT.

THROUGH 145 AM MDT...ADDITIONAL RAINFALL OF 1/4 INCH IS LIKELY IN 
THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

FLOOD WATERS ARE LIKELY MOVING DOWN SPRING CREEK AND SAND CREEK FROM 
BRANDON AND VENANGO SOUTH TO THE CHASE COUNTY LINE. FLOODING SHOULD 
SUBSIDE NORTH OF HIGHWAY 23 TO THE KEITH COUNTY LINE. ANY FLOODING 
ON HIGHWAY 23 SHOULD SUBSIDE.

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.

LAT...LON 4070 10204 4071 10166 4099 10167 4099 10204

$$

CDC
000 
WGUS73 KLBF 130742
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
240 AM CDT WED JUN 13 2007

NEC135-130750-
PERKINS NE-
140 AM MDT WED JUN 13 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 245 AM CDT(145 AM MDT) FOR
WESTERN PERKINS COUNTY...

THE THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EXITED PERKINS 
COUNTY. ADDITIONAL HEAVY RAIN AND FLOODING IS NOT EXPECTED THROUGH 4 
AM MDT. CONDITIONS REMAIN FAVORABLE FOR HEAVY RAIN TO DEVELOP. A 
FLOOD WATCH CONTINUES IN EFFECT TODAY AND THIS EVENING.

LAT...LON 4070 10204 4071 10166 4099 10167 4099 10204

$$

CDC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 12:37 AM MDTFlash Flood WarningLBFKeith83 min
Jun 13, 2:00 AM MDTFlash Flood WarningLBFKeith60 min
Jun 13, 2:56 AM MDTFlash Flood WarningLBFHolt, Wheeler3 hr
Jun 13, 6:55 AM MDTFlash Flood WarningLBFChase, Keith, Perkins2 hr
Jun 13, 8:40 AM MDTFlash Flood WarningLBFChase, Keith, Lincoln, Perkins6 hr
Jun 13, 2:40 PM MDTFlash Flood WarningLBFChase6 hr

Nearby

Flash Flood Warnings in Nebraska, 2007Every flash flood warning in 2007

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.