Alert archive / Nebraska / Flash Flood Warnings in 2021

Flash Flood Warning 22, NWS Goodland, KS

May 26, 2021Hitchcock County, Nebraska

NWS Goodland, KS issued this flash flood warning at May 26, 2021, 8:43 PM CDT for Hitchcock County, Nebraska. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 26, 2021, 8:43 PM CDT (01:43 UTC)
Expired: May 27, 2021, 2:45 AM CDT
In force: 6 hr
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Flood severity: None

County Hitchcock County, NE

The radar

The Goodland radar (KGLD), 117 km from the middle of the area, began a volume at 01:42 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.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.7 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.

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: 124 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1622 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 363 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 9.7

Open this sounding in Storm Lab

The text

As transmitted.

455 
WGUS53 KGLD 270143
FFWGLD
NEC087-270745-
/O.NEW.KGLD.FF.W.0022.210527T0143Z-210527T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
843 PM CDT Wed May 26 2021

The National Weather Service in Goodland has issued a

* Flash Flood Warning for...
  Northern Hitchcock County in southwestern Nebraska...

* Until 245 AM CDT Thursday.

* At 843 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Culbertson and Palisade.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4021 10076 4021 10132 4035 10132 4035 10076

FLASH FLOOD...RADAR INDICATED

$$

Lundquist

1 follow-up statement

703 
WGUS73 KGLD 270751
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
251 AM CDT Thu May 27 2021

NEC087-270801-
/O.EXP.KGLD.FF.W.0022.000000T0000Z-210527T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hitchcock NE-
251 AM CDT Thu May 27 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHERN HITCHCOCK COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

LAT...LON 4021 10076 4021 10132 4035 10132 4035 10076

$$

ANW

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 7:14 PM CDT	Flash Flood Warning	GLD	Hitchcock, Red Willow	8 hr
May 26, 7:33 PM CDT	Severe Thunderstorm Warning	GLD	Red Willow	42 min
May 26, 7:36 PM CDT	Special Weather Statement	GLD	Hitchcock	39 min
May 26, 7:48 PM CDT	Severe Thunderstorm Warning	GLD	Hitchcock	27 min
May 26, 8:02 PM CDT	Tornado Warning	GLD	Hitchcock	28 min
May 26, 8:03 PM CDT	Severe Thunderstorm Warning	GLD	Red Willow	57 min
May 26, 8:27 PM CDT	Severe Thunderstorm Warning	GLD	Hitchcock, Red Willow	48 min
May 26, 9:02 PM CDT	Severe Thunderstorm Warning	GLD	Red Willow	17 min
May 26, 9:14 PM CDT	Severe Thunderstorm Warning	GLD	Red Willow	46 min
May 26, 9:38 PM CDT	Severe Thunderstorm Warning	GLD	Red Willow	22 min
May 26, 10:09 PM CDT	Special Weather Statement	GLD	Hitchcock, Red Willow	66 min
May 26, 11:13 PM CDT	Special Weather Statement	GLD	Red Willow	62 min
May 27, 1:13 AM CDT	Special Weather Statement	GLD	Hitchcock, Red Willow	62 min
May 27, 5:16 AM CDT	River Flood Advisory	GLD	Hitchcock	11 hr
May 27, 7:40 AM CDT	Special Weather Statement	GLD	Hitchcock	80 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.