Alert archive / Nebraska / Flash Flood Warnings in 2023

Flash Flood Warning 21, NWS North Platte, NE

October 12, 2023Blaine County, Custer County, Loup County, Nebraska

NWS North Platte, NE issued this flash flood warning at Oct 12, 2023, 2:57 PM CDT for Blaine County, Custer County, Loup County, Nebraska. It was in force for 9 hr. 5 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: Oct 12, 2023, 2:57 PM CDT (19:57 UTC)
Expired: Oct 12, 2023, 11:47 PM CDT
In force: 9 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Flood severity: None

Counties Blaine County, NE, Custer County, NE, Loup County, NE

The radar

The North Platte radar (KLNX), 86 km from the middle of the area, began a volume at 19:57 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
Oct 12, 3:09 PM CDT	RAIN 4.54	2 Nnw Broken Bow, NE	ASOS station KBBW Broken Bow Airport, PCPN6 however this occurred over a 3 hour period.
Oct 12, 3:33 PM CDT	FLASH FLOOD	1 E Broken Bow, NE	Video relayed from Custer County EM showing swift water over roadways.
Oct 12, 3:33 PM CDT	FLASH FLOOD	Broken Bow, NE	Photos of flash flooding in the town of Broken Bow with swift water and fairgrounds flooded out; relayed from EM in Valley County.
Oct 12, 5:36 PM CDT	FLASH FLOOD	2 S Broken Bow, NE	Extensive overland flooding is underway along highway 21 and road 797.
Oct 12, 5:36 PM CDT	FLASH FLOOD	Broken Bow, NE	Extensive overland flooding is underway along highway 21 and road 797.

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, 8.0 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-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: 689 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

711 
WGUS53 KLBF 121957
FFWLBF
NEC009-041-115-130200-
/O.NEW.KLBF.FF.W.0021.231012T1957Z-231013T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service North Platte NE
257 PM CDT Thu Oct 12 2023

The National Weather Service in North Platte has issued a

* Flash Flood Warning for...
  North Central Custer County in central Nebraska...
  Southeastern Blaine County in north central Nebraska...
  Southwestern Loup County in north central Nebraska...

* Until 900 PM CDT Thursday.

* At 257 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 6 inches of rain 
  have fallen. The expected rainfall rate is 1 to 3 inches in 1 
  hour. Additional rainfall amounts of 2 to 3 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Broken Bow, Lillian, Gates and Walworth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4178 9971 4178 9948 4130 9960 4131 9977
      4156 9973

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR

$$

Jacobs

4 follow-up statements

414 
WGUS53 KLBF 122247
FFWLBF
NEC009-041-115-130500-
/O.EXT.KLBF.FF.W.0021.000000T0000Z-231013T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service North Platte NE
547 PM CDT Thu Oct 12 2023

The National Weather Service in North Platte has extended the

* Flash Flood Warning for...
  North Central Custer County in central Nebraska...
  Southeastern Blaine County in north central Nebraska...
  Southwestern Loup County in north central Nebraska...

* Until midnight CDT tonight.

* At 547 PM CDT, Emergency management reports flash flooding in the 
  vicinity of highway 21 and road 797. . Between 3 and 6 inches of 
  rain have fallen. Additional rainfall amounts up to 1 inch are 
  possible in the warned area. Flash flooding is already occurring 
  and expected to continue through midnight CDT.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Broken Bow, Lillian, Gates and Walworth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4178 9971 4178 9948 4130 9960 4131 9977
      4156 9973

FLASH FLOOD...OBSERVED

$$

Buttler

427 
WGUS73 KLBF 130121
FFSLBF

Flash Flood Statement
National Weather Service North Platte NE
821 PM CDT Thu Oct 12 2023

NEC009-041-115-130500-
/O.CON.KLBF.FF.W.0021.000000T0000Z-231013T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blaine NE-Custer NE-Loup NE-
821 PM CDT Thu Oct 12 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT 
FOR NORTH CENTRAL CUSTER, SOUTHEASTERN BLAINE AND SOUTHWESTERN LOUP 
COUNTIES...

At 821 PM CDT, emergency management reported thunderstorms producing 
heavy rain in Emergency management reports flash flooding in the 
vicinity of highway 21 and road 797. . Between 3 and 6 inches of 
rain have fallen. The expected rainfall rate is 0.25 inches in 1 
hour. Additional rainfall amounts up to 1 inch are possible in the 
warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Broken Bow, Lillian, Gates and Walworth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4178 9971 4178 9948 4130 9960 4131 9977
      4156 9973

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.25 INCHES IN 1 HOUR

$$

CDC

439 
WGUS73 KLBF 130154
FFSLBF

Flash Flood Statement
National Weather Service North Platte NE
854 PM CDT Thu Oct 12 2023

NEC009-041-115-130500-
/O.CON.KLBF.FF.W.0021.000000T0000Z-231013T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blaine NE-Custer NE-Loup NE-
854 PM CDT Thu Oct 12 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT 
FOR NORTH CENTRAL CUSTER, SOUTHEASTERN BLAINE AND SOUTHWESTERN LOUP 
COUNTIES...

At 854 PM CDT, emergency management reported heavy rain and flash 
flooding in the vicinity of highway 21 and road 797. Between 3 and 6 
inches of rain have fallen. The expected rainfall rate is 0.25 
inches in 1 hour. Additional rainfall amounts up to 1 inch are 
possible in the warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Emergency management reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Broken Bow, Lillian, Gates and Walworth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4178 9971 4178 9948 4130 9960 4131 9977
      4156 9973

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.25 INCHES IN 1 HOUR

$$

CDC

860 
WGUS73 KLBF 130447
FFSLBF

Flash Flood Statement
National Weather Service North Platte NE
1147 PM CDT Thu Oct 12 2023

NEC009-041-115-130457-
/O.CAN.KLBF.FF.W.0021.000000T0000Z-231013T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blaine NE-Custer NE-Loup NE-
1147 PM CDT Thu Oct 12 2023

...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL CUSTER, 
SOUTHEASTERN BLAINE AND SOUTHWESTERN LOUP COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4178 9971 4178 9948 4130 9960 4131 9977
      4156 9973

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 8:00 PM CDT	Special Weather Statement	LBF	Wheeler	60 min
Oct 11, 8:30 PM CDT	Special Weather Statement	LBF	Holt	60 min
Oct 11, 8:40 PM CDT	Special Weather Statement	LBF	Rock	50 min
Oct 11, 8:59 PM CDT	Special Weather Statement	LBF	Brown	61 min
Oct 11, 9:01 PM CDT	Special Weather Statement	LBF	Wheeler	29 min
Oct 11, 9:25 PM CDT	Special Weather Statement	LBF	Keya Paha	35 min
Oct 11, 9:42 PM CDT	Special Weather Statement	LBF	Wheeler	18 min
Oct 11, 9:46 PM CDT	Special Weather Statement	LBF	Holt	29 min
Oct 11, 9:49 PM CDT	Special Weather Statement	LBF	Keya Paha	56 min
Oct 11, 9:58 PM CDT	Areal Flood Advisory	LBF	Holt	4 hr
Oct 11, 10:02 PM CDT	Areal Flood Advisory	LBF	Holt, Wheeler	54 min
Oct 11, 10:42 PM CDT	Special Weather Statement	LBF	Garfield	48 min
Oct 11, 10:56 PM CDT	Flash Flood Warning	LBF	Holt, Wheeler	2 hr
Oct 11, 11:37 PM CDT	Areal Flood Advisory	LBF	Holt, Rock	3 hr
Oct 11, 11:49 PM CDT	Special Weather Statement	LBF	Lincoln	56 min
Oct 12, 12:58 AM CDT	Special Weather Statement	LBF	Sherman	47 min
Oct 12, 1:04 AM CDT	Areal Flood Advisory	LBF	Holt, Wheeler	2 hr
Oct 12, 3:17 AM CDT	High Wind Warning	LBF	Arthur, Blaine, Boyd, Brown, Chase, Cherry and 20 more	36 hr
Oct 12, 3:45 AM CDT	Special Weather Statement	LBF	McPherson	45 min
Oct 12, 11:35 AM CDT	Special Weather Statement	LBF	Rock	40 min
Oct 12, 12:26 PM CDT	Special Weather Statement	LBF	Frontier	49 min
Oct 12, 12:49 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	24 min
Oct 12, 12:51 PM CDT	Areal Flood Advisory	LBF	Custer	6 hr
Oct 12, 1:12 PM CDT	Special Weather Statement	LBF	Lincoln	48 min
Oct 12, 1:39 PM CDT	Special Weather Statement	LBF	Lincoln	51 min
Oct 12, 1:41 PM CDT	Special Weather Statement	LBF	Lincoln	49 min
Oct 12, 1:42 PM CDT	Winter Weather Advisory	LBF	Sheridan	13 hr
Oct 12, 1:51 PM CDT	Areal Flood Advisory	LBF	Blaine, Custer, Loup	6 hr
Oct 12, 2:46 PM CDT	Areal Flood Advisory	LBF	Blaine, Custer, Loup	5 hr
Oct 12, 3:25 PM CDT	Areal Flood Advisory	LBF	Custer, Garfield, Loup	5 hr
Oct 12, 3:35 PM CDT	Areal Flood Advisory	LBF	Garfield, Holt, Loup, Rock	6 hr
Oct 12, 3:39 PM CDT	Areal Flood Advisory	LBF	Boyd, Brown, Holt, Keya Paha, Rock	6 hr
Oct 12, 3:58 PM CDT	Special Weather Statement	LBF	Garfield	47 min
Oct 12, 5:17 PM CDT	Areal Flood Advisory	LBF	Brown, Cherry, Keya Paha	6 hr

Nearby

Flash Flood Warnings in Nebraska, 2023 Every flash flood warning in 2023

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.