Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 13, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at Jul 8, 2011, 8:50 PM MDT for Chase County, Perkins County, Nebraska. It was in force for 6 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 8, 2011, 8:50 PM MDT (02:50 UTC)
- Expired
- Jul 9, 2011, 3:00 AM MDT
- In force
- 6 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
Counties Chase County, NE, Perkins County, NE
The radar
The Goodland radar (KGLD), 144 km from the middle of the area, began a volume at 02:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 8, 10:40 PM MDT | FLASH FLOOD | 7 Sw Brandon, NE | THREE FEET OF WATER REPORTED IN VENANGO. WATER HAS DAMAGED SOME RESIDENCES. |
| Jul 8, 10:40 PM MDT | HEAVY RAIN 5.5 | 7 Sw Brandon, NE | RAINFALL MEASUREMENT OF 5.50 INCHES BY A FIREMAN IN VENANGO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.8 hours before the alert went out and 101 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.
- Mixed-layer CAPE
- 1154 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1374 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 10.0
The text
As transmitted, in the capitals the NWS used until 2016.
354
WGUS53 KLBF 090250
FFWLBF
NEC029-135-090900-
/O.NEW.KLBF.FF.W.0013.110709T0250Z-110709T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
850 PM MDT FRI JUL 8 2011
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN CHASE COUNTY IN SOUTHWEST NEBRASKA...
SOUTHERN PERKINS COUNTY IN SOUTHWEST NEBRASKA...
* UNTIL 300 AM MDT SATURDAY
* AT 848 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RAINFALL EXCEEDING THREE INCHES HAS BEEN INDICATED
BY RADAR AND RAINFALL OF 2.6 INCHES WAS REPORTED AT THE FIRE
STATION IN VENANGO IN AN HOUR OR LESS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GRANT...IMPERIAL...BRANDON...ELSIE...GRAINTON...LAMAR...MADRID AND
VENANGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS EXCEEDING TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.
&&
LAT...LON 4048 10206 4090 10207 4090 10125 4070 10125
4070 10138 4048 10135
$$
SPRINGER1 follow-up statement
868
WGUS73 KLBF 090357
FFSLBF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
957 PM MDT FRI JUL 8 2011
NEC029-135-090900-
/O.CON.KLBF.FF.W.0013.000000T0000Z-110709T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHASE NE-PERKINS NE-
957 PM MDT FRI JUL 8 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR PERKINS AND NORTHERN
CHASE COUNTIES UNTIL 300 AM MDT...
AT 956 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR
ESTIMATES INDICATE THAT RAINFALL SO FAR HAS EXCEEDED FOUR INCHES
THIS EVENING.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
GRANT...IMPERIAL...BRANDON...ELSIE...GRAINTON...LAMAR...MADRID AND
VENANGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF AN INCH OR TWO ARE POSSIBLE IN THE
WARNED AREA.
&&
LAT...LON 4048 10206 4090 10207 4090 10125 4070 10125
4070 10138 4048 10135
$$
SPRINGERThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 7:06 PM MDT | Areal Flood Advisory | LBF | Arthur, Garden | 6 hr |
| Jul 8, 8:26 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 49 min |
| Jul 8, 8:44 PM MDT | Flash Flood Warning | LBF | Logan, McPherson, Thomas | 2 min |
Nearby
Flash Flood Warnings in Nebraska, 2011Every flash flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.