Alert archive / Nebraska / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Hastings, NE

July 25, 2021Furnas County, Gosper County, Nebraska

NWS Hastings, NE issued this flash flood warning at Jul 25, 2021, 7:37 AM CDT for Furnas County, Gosper 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 25, 2021, 7:37 AM CDT (12:37 UTC)
Expired: Jul 25, 2021, 1:30 PM CDT
In force: 6 hr
Issued by: NWS Hastings, NE
Area: Storm-based polygon
Flood severity: None

Counties Furnas County, NE, Gosper County, NE

The radar

The Grand Island radar (KUEX), 119 km from the middle of the area, began a volume at 12:38 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 25, 8:00 AM CDT	HEAVY RAIN 3.27	8 S Elwood, NE	PEA SIZED HAIL.
Jul 25, 12:30 PM CDT	HEAVY RAIN 2.9	Arapahoe, NE	1.30 INCHES OF RAIN FELL WITHIN AN HOUR. STREETS IN ARAPAHOE ARE CURB TO CURB WITH WATER ALONG HWY 6/34.

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, 0.6 hours before the alert went out and 105 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: 1414 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1081 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: -114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

239 
WGUS53 KGID 251237
FFWGID
NEC065-073-251830-
/O.NEW.KGID.FF.W.0005.210725T1237Z-210725T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Hastings NE
737 AM CDT Sun Jul 25 2021

The National Weather Service in Hastings has issued a

* Flash Flood Warning for...
  Northern Furnas County in south central Nebraska...
  Southern Gosper County in south central Nebraska...

* Until 130 PM CDT.

* At 737 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 7 inches of rain 
  have fallen. Additional rainfall amounts up to 1 inch 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...
  Arapahoe, Holbrook and Edison.

This includes the following streams and drainages...
  Timmons Creek, Elk Creek, Muddy Creek, Dry Creek, Elder Creek, 
  Deer Creek, Crum Creek, Swartz Creek, and Turkey Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 10010 4044 9998 4059 9998 4046 9970
      4041 9964 4035 9964 4035 9963 4032 9963
      4023 9963 4027 9984 4029 10002 4028 10010

FLASH FLOOD...RADAR INDICATED

$$

Wesely

1 follow-up statement

879 
WGUS73 KGID 251827
FFSGID

Flash Flood Statement
National Weather Service Hastings NE
127 PM CDT Sun Jul 25 2021

NEC065-073-251837-
/O.EXP.KGID.FF.W.0005.000000T0000Z-210725T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Furnas NE-Gosper NE-
127 PM CDT Sun Jul 25 2021

...FLASH FLOOD WARNING AT 130 PM CDT THIS AFTERNOON FOR NORTHERN 
FURNAS AND SOUTHERN GOSPER COUNTIES HAS BEEN REPLACED WITH A FLOOD 
WARNING...

LAT...LON 4044 10010 4044 9998 4059 9998 4046 9970
      4041 9964 4035 9964 4035 9963 4032 9963
      4023 9963 4027 9984 4029 10002 4028 10010

$$

Wesely

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 7:20 PM CDT	Special Weather Statement	GID	Harlan	40 min
Jul 24, 9:03 PM CDT	Special Weather Statement	GID	Kearney	42 min
Jul 24, 9:44 PM CDT	Special Weather Statement	GID	Kearney, Phelps	46 min
Jul 24, 9:52 PM CDT	Areal Flood Advisory	GID	Kearney, Phelps	50 min
Jul 24, 10:40 PM CDT	Areal Flood Advisory	GID	Kearney, Phelps	6 hr
Jul 25, 2:47 AM CDT	Areal Flood Advisory	GID	Furnas, Gosper	8 hr
Jul 25, 3:27 AM CDT	Special Weather Statement	GID	Harlan	33 min
Jul 25, 4:06 AM CDT	Special Weather Statement	GID	Gosper	24 min
Jul 25, 4:32 AM CDT	Flash Flood Warning	GID	Furnas, Gosper	6 hr
Jul 25, 5:09 AM CDT	Special Weather Statement	GID	Nuckolls	36 min
Jul 25, 5:23 AM CDT	Special Weather Statement	GID	Webster	37 min
Jul 25, 5:48 AM CDT	Areal Flood Advisory	GID	Adams, Clay, Nuckolls, Webster	6 hr
Jul 25, 6:57 AM CDT	Areal Flood Advisory	GID	Nuckolls, Thayer	12 hr
Jul 25, 1:27 PM CDT	Areal Flood Warning	GID	Furnas, Gosper	8 hr

Nearby

Flash Flood Warnings in Nebraska, 2021 Every flash flood warning in 2021

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.