Alert archive / Nebraska / Flash Flood Warnings in 2017
Flash Flood Warning 8, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at Aug 15, 2017, 12:36 PM CDT for Custer 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 15, 2017, 12:36 PM CDT (17:36 UTC)
- Expired
- Aug 15, 2017, 6:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
County Custer County, NE
The radar
The North Platte radar (KLNX), 85 km from the middle of the area, began a volume at 17:37 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 15, 12:41 PM CDT | HEAVY RAIN 0.5 | Merna, NE | SPOTTER REPORTED A HALF INCH OF RAIN IN 20 MINUTES WITH WATER COVERING THE ROAD TO 2 INCH DEPTH IN TOWN. |
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 12:00Z, 5.6 hours before the alert went out and 76 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
- 418 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
849
WGUS53 KLBF 151736
FFWLBF
NEC041-152330-
/O.NEW.KLBF.FF.W.0008.170815T1736Z-170815T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service North Platte NE
1236 PM CDT TUE AUG 15 2017
The National Weather Service in North Platte has issued a
* Flash Flood Warning for...
Central Custer County in central Nebraska...
* Until 630 PM CDT
* At 1234 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area from southwest into west central
Custer County. Rainfall amounts from 2 to 4 inches inches of rain
have fallen with thunderstorm training to increase the threat for
flash flooding. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Broken Bow, Arnold, Callaway, Sargent, Merna, Anselmo, Victoria
Springs State Recreation Area, Lillian, Round Valley, Walworth,
Milldale, Pleasant Hill, Big Oak Canyon, Finchville, Divide Hill
and Gates.
This includes the following highways...
Highway 183 between mile markers 108 and 121.
Highway 2 between mile markers 257 and 278.
Highway 92 between mile markers 247 and 273.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4110 10024 4148 10025 4174 9964 4173 9921
4162 9921
$$
Keck2 follow-up statements
475
WGUS73 KLBF 151922
FFSLBF
Flash Flood Statement
National Weather Service North Platte NE
222 PM CDT TUE AUG 15 2017
NEC041-152330-
/O.CON.KLBF.FF.W.0008.000000T0000Z-170815T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer NE-
222 PM CDT TUE AUG 15 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
CENTRAL CUSTER COUNTY...
At 218 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area have diminished. One to two inches of
rain have fallen this morning and early afternoon. However, with
this morning's rain and that which has fallen in the last few days,
any additional rainfall will cause flash flooding easily. Additional
thunderstorm development is expected later this afternoon and
evening.
Some locations that will experience flooding include...
Broken Bow, Arnold, Callaway, Sargent, Merna, Anselmo, Victoria
Springs State Recreation Area, Lillian, Round Valley, Walworth,
Milldale, Pleasant Hill, Big Oak Canyon, Finchville, Divide Hill and
Gates.
Additional rainfall amounts of one to two inches are possible in the
warned area later today.
This includes the following highways...
Highway 183 between mile markers 108 and 121.
Highway 2 between mile markers 257 and 278.
Highway 92 between mile markers 247 and 273.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 4110 10024 4148 10025 4174 9964 4173 9921
4162 9921
$$
JWS190
WGUS73 KLBF 152101
FFSLBF
Flash Flood Statement
National Weather Service North Platte NE
401 PM CDT TUE AUG 15 2017
NEC041-152108-
/O.CAN.KLBF.FF.W.0008.000000T0000Z-170815T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer NE-
401 PM CDT TUE AUG 15 2017
...THE FLASH FLOOD WARNING FOR CENTRAL CUSTER COUNTY IS CANCELLED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
A flash flood watch remains in effect for the area. Additional
thunderstorms with heavy rain are expected this evening and
overnight. Therefore additional flooding will be possible.
LAT...LON 4110 10024 4148 10025 4174 9964 4173 9921
4162 9921
$$
JWSThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 9:17 PM CDT | Special Weather Statement | LBF | Sheridan | 28 min |
| Aug 14, 9:26 PM CDT | Special Weather Statement | LBF | Sheridan | 49 min |
| Aug 14, 9:31 PM CDT | Severe Thunderstorm Warning | LBF | Cherry, Sheridan | 44 min |
| Aug 14, 10:09 PM CDT | Special Weather Statement | LBF | Grant | 66 min |
| Aug 14, 10:37 PM CDT | Special Weather Statement | LBF | Cherry, Grant | 38 min |
| Aug 14, 11:12 PM CDT | Special Weather Statement | LBF | Cherry, Hooker | 48 min |
| Aug 14, 11:58 PM CDT | Special Weather Statement | LBF | Cherry, Hooker | 47 min |
| Aug 15, 12:27 AM CDT | Special Weather Statement | LBF | Sheridan | 48 min |
| Aug 15, 3:53 AM CDT | Areal Flood Advisory | LBF | Holt | 3 hr |
| Aug 15, 8:30 AM CDT | Special Weather Statement | LBF | Garfield, Wheeler | 60 min |
| Aug 15, 11:12 AM CDT | Special Weather Statement | LBF | Garfield | 63 min |
| Aug 15, 11:49 AM CDT | Severe Thunderstorm Warning | LBF | Garfield, Holt | 41 min |
| Aug 15, 11:57 AM CDT | Special Weather Statement | LBF | Custer | 48 min |
| Aug 15, 11:59 AM CDT | Special Weather Statement | LBF | Lincoln | 46 min |
| Aug 15, 12:06 PM CDT | Severe Thunderstorm Warning | LBF | Lincoln | 39 min |
| Aug 15, 12:28 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Loup | 47 min |
| Aug 15, 12:30 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 45 min |
| Aug 15, 12:39 PM CDT | Flash Flood Warning | LBF | Garfield, Holt | 6 hr |
| Aug 15, 12:49 PM CDT | Special Weather Statement | LBF | Logan | 41 min |
| Aug 15, 12:58 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Logan | 30 min |
| Aug 15, 2:08 PM CDT | Special Weather Statement | LBF | Garfield | 52 min |
| Aug 15, 3:40 PM CDT | Special Weather Statement | LBF | Sherman | 50 min |
| Aug 15, 4:15 PM CDT | Special Weather Statement | LBF | Loup, Rock | 60 min |
| Aug 15, 5:08 PM CDT | Special Weather Statement | LBF | Garfield, Holt | 97 min |
| Aug 15, 5:31 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Garfield, Loup | 44 min |
| Aug 15, 5:43 PM CDT | Special Weather Statement | LBF | Custer | 47 min |
| Aug 15, 5:55 PM CDT | Flash Flood Warning | LBF | Custer, Garfield, Loup | 6 hr |
| Aug 15, 6:13 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 47 min |
| Aug 15, 6:17 PM CDT | Special Weather Statement | LBF | Holt | 43 min |
| Aug 15, 6:32 PM CDT | Flash Flood Warning | LBF | Logan | 3 hr |
| Aug 15, 6:45 PM CDT | Special Weather Statement | LBF | Logan | 45 min |
| Aug 15, 6:47 PM CDT | Special Weather Statement | LBF | Wheeler | 58 min |
| Aug 15, 6:51 PM CDT | Special Weather Statement | LBF | Arthur, Keith | 54 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.