Alert archive / Nebraska / Flash Flood Warnings in 2017
Flash Flood Warning 15, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at Aug 19, 2017, 9:20 PM CDT for Custer County, Loup County, Nebraska. It was in force for 6 hr. 1 report 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
- Aug 19, 2017, 9:20 PM CDT (02:20 UTC)
- Expired
- Aug 20, 2017, 3:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
Counties Custer County, NE, Loup County, NE
The radar
The North Platte radar (KLNX), 88 km from the middle of the area, began a volume at 02:18 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 |
|---|---|---|---|
| Aug 19, 10:05 PM CDT | FLASH FLOOD | Sargent, NE | WATER ABOUT TO RUN OVER ROADS IN SARGENT. DITCHES ARE FULL AND CITY PUMPS ARE RUNNING. |
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, 2.3 hours before the alert went out and 110 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
- 2449 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 2367 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
The text
As transmitted.
405
WGUS53 KLBF 200220
FFWLBF
NEC041-115-200815-
/O.NEW.KLBF.FF.W.0015.170820T0220Z-170820T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service North Platte NE
920 PM CDT SAT AUG 19 2017
The National Weather Service in North Platte has issued a
* Flash Flood Warning for...
Southern Loup County in north central Nebraska...
Northeastern Custer County in central Nebraska...
* Until 315 AM CDT
* At 919 PM CDT, Doppler radar indicated heavy rain across the warned
area. Up to two inches of rain have already fallen. Flash flooding
is expected to begin shortly.
* Some locations that will experience flooding include...
Taylor, Sargent, Victoria Springs State Recreation Area, Calamus
Reservoir State Recreation Area, Lillian, Walworth, Almeria, Nunda
Shoal Campground, Divide Hill, Valley View Flat Campground, Gates
and Kent Diversion Dam State Wildlife Management Area.
Additional rainfall amounts of up to 2 inches are possible in the
warned area.
This includes Highway 183 between mile markers 110 and 132.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4156 9928 4158 9978 4170 9975 4174 9972
4174 9968 4180 9968 4185 9965 4186 9947
4193 9925
$$
Taylor2 follow-up statements
099
WGUS73 KLBF 200330
FFSLBF
Flash Flood Statement
National Weather Service North Platte NE
1030 PM CDT SAT AUG 19 2017
NEC041-115-200815-
/O.CON.KLBF.FF.W.0015.000000T0000Z-170820T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Loup NE-Custer NE-
1030 PM CDT SAT AUG 19 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
SOUTHERN LOUP AND NORTHEASTERN CUSTER COUNTIES...
At 1027 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain are exiting eastern portions of the warned area.
Additional thunderstorms could still redevelop. Doppler radar
estimates 1 to 4 inches of rain have fallen. Flash flooding is
expected.
Some locations that will experience flooding include...
Taylor, Sargent, Victoria Springs State Recreation Area, Calamus
Reservoir State Recreation Area, Lillian, Walworth, Almeria, Nunda
Shoal Campground, Divide Hill, Valley View Flat Campground, Gates and
Kent Diversion Dam State Wildlife Management Area.
Additional rainfall amounts of a half inch are possible in the
warned area.
This includes Highway 183 between mile markers 110 and 132.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4156 9928 4158 9978 4170 9975 4174 9972
4174 9968 4180 9968 4185 9965 4186 9947
4193 9925
$$
Roberg753
WGUS73 KLBF 200811
FFSLBF
Flash Flood Statement
National Weather Service North Platte NE
311 AM CDT SUN AUG 20 2017
NEC041-115-200820-
/O.EXP.KLBF.FF.W.0015.000000T0000Z-170820T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Loup NE-Custer NE-
311 AM CDT SUN AUG 20 2017
...THE FLASH FLOOD WARNING FOR SOUTHERN LOUP AND NORTHEASTERN CUSTER
COUNTIES WILL EXPIRE AT 315 AM CDT...
The rain has ended across the area. Flooding is no longer expected
to pose a threat. Please continue to heed any remaining road
closures.
LAT...LON 4156 9928 4158 9978 4170 9975 4174 9972
4174 9968 4180 9968 4185 9965 4186 9947
4193 9925
$$
SnivelyThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 7:14 PM CDT | Severe Thunderstorm Warning | LBF | Blaine, Loup, Rock | 46 min |
| Aug 19, 7:39 PM CDT | Tornado Warning | LBF | Loup | 51 min |
| Aug 19, 7:54 PM CDT | Flash Flood Warning | LBF | Blaine, Loup, Rock | 6 hr |
| Aug 19, 8:02 PM CDT | Tornado Warning | LBF | Loup | 43 min |
| Aug 19, 8:44 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 61 min |
| Aug 19, 8:48 PM CDT | Severe Thunderstorm Warning | LBF | Loup | 27 min |
| Aug 19, 9:01 PM CDT | Tornado Warning | LBF | Custer | 29 min |
| Aug 19, 9:45 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 45 min |
| Aug 19, 10:20 PM CDT | Special Weather Statement | LBF | Loup | 40 min |
| Aug 19, 10:40 PM CDT | Special Weather Statement | LBF | Custer | 50 min |
Nearby
Flash Flood Warnings in Nebraska, 2017Every flash flood warning in 2017
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.