Alert archive / Kansas / Flash Flood Warnings in 2021

Flash Flood Warning 25, NWS Goodland, KS

May 29, 2021Cheyenne County, Sherman County, Kansas

NWS Goodland, KS issued this flash flood warning at May 29, 2021, 8:23 PM CDT for Cheyenne County, Sherman County, Kansas. It was in force for 2 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 29, 2021, 8:23 PM CDT (01:23 UTC)
Expired: May 29, 2021, 10:25 PM CDT
In force: 2 hr
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Flood severity: None

Counties Cheyenne County, KS, Sherman County, KS

The radar

The Goodland radar (KGLD), 29 km from the middle of the area, began a volume at 01:26 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

Denver, CO (KDNR), launched 00:00Z, 1.4 hours before the alert went out and 152 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: 278 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1446 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

677 
WGUS53 KGLD 300123
FFWGLD
KSC023-181-300315-
/O.NEW.KGLD.FF.W.0025.210530T0123Z-210530T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
823 PM CDT Sat May 29 2021

The National Weather Service in Goodland has issued a

* Flash Flood Warning for...
  Southeastern Cheyenne County in northwestern Kansas...
  Northeastern Sherman County in northwestern Kansas...

* Until 1015 PM CDT /915 PM MDT/.

* At 822 PM CDT /722 PM MDT/, 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...
  mainly rural areas of Southeastern Cheyenne and Northeastern 
  Sherman Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3957 10161 3965 10161 3965 10143 3959 10141
      3958 10141 3957 10141 3949 10139 3949 10161

FLASH FLOOD...RADAR INDICATED

$$

JN

4 follow-up statements

634 
WGUS73 KGLD 300145
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
845 PM CDT Sat May 29 2021

KSC023-181-300315-
/O.CON.KGLD.FF.W.0025.000000T0000Z-210530T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheyenne KS-Sherman KS-
845 PM CDT Sat May 29 2021 /745 PM MDT Sat May 29 2021/

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT/915 PM 
MDT/ THIS EVENING FOR SOUTHEASTERN CHEYENNE AND NORTHEASTERN SHERMAN 
COUNTIES...

At 844 PM CDT /744 PM MDT/, 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...
  mainly rural areas of Southeastern Cheyenne and Northeastern 
  Sherman Counties

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 3957 10161 3965 10161 3965 10143 3959 10141
      3958 10141 3957 10141 3949 10139 3949 10161

FLASH FLOOD...RADAR INDICATED

$$

JBH

376 
WGUS53 KGLD 300212
FFWGLD
KSC023-181-300415-
/O.EXT.KGLD.FF.W.0025.000000T0000Z-210530T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
912 PM CDT Sat May 29 2021

The National Weather Service in Goodland has extended the

* Flash Flood Warning for...
  Southeastern Cheyenne County in northwestern Kansas...
  Northeastern Sherman County in northwestern Kansas...

* Until 1115 PM CDT /1015 PM MDT/.

* At 911 PM CDT /811 PM MDT/, 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...
  mainly rural areas of Southeastern Cheyenne and Northeastern 
  Sherman Counties

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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

&&

LAT...LON 3957 10161 3965 10161 3965 10143 3959 10141
      3958 10141 3957 10141 3949 10139 3949 10161

FLASH FLOOD...RADAR INDICATED

$$

MRC/JN

887 
WGUS73 KGLD 300259
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
959 PM CDT Sat May 29 2021

KSC023-181-300415-
/O.CON.KGLD.FF.W.0025.000000T0000Z-210530T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheyenne KS-Sherman KS-
959 PM CDT Sat May 29 2021 /859 PM MDT Sat May 29 2021/

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT/1015 PM 
MDT/ THIS EVENING FOR SOUTHEASTERN CHEYENNE AND NORTHEASTERN SHERMAN 
COUNTIES...

At 959 PM CDT /859 PM MDT/, 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...
  mainly rural areas of Southeastern Cheyenne and Northeastern 
  Sherman Counties

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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

&&

LAT...LON 3957 10161 3965 10161 3965 10143 3959 10141
      3958 10141 3957 10141 3949 10139 3949 10161

FLASH FLOOD...RADAR INDICATED

$$

JN

323 
WGUS73 KGLD 300325
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
1025 PM CDT Sat May 29 2021

KSC023-181-300335-
/O.CAN.KGLD.FF.W.0025.000000T0000Z-210530T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheyenne KS-Sherman KS-
1025 PM CDT Sat May 29 2021 /925 PM MDT Sat May 29 2021/

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN CHEYENNE AND 
NORTHEASTERN SHERMAN COUNTIES...

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

LAT...LON 3957 10161 3965 10161 3965 10143 3959 10141
      3958 10141 3957 10141 3949 10139 3949 10161

$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 7:02 PM CDT	Special Weather Statement	GLD	Cheyenne	43 min
May 29, 7:32 PM CDT	Special Weather Statement	GLD	Cheyenne	43 min
May 29, 8:09 PM CDT	Special Weather Statement	GLD	Cheyenne, Sherman	36 min
May 29, 8:51 PM CDT	Special Weather Statement	GLD	Thomas	54 min
May 29, 9:19 PM CDT	Flash Flood Warning	GLD	Thomas	2 hr
May 29, 9:43 PM CDT	Special Weather Statement	GLD	Thomas	62 min
May 29, 9:51 PM CDT	Special Weather Statement	GLD	Cheyenne	54 min
May 29, 10:27 PM CDT	Areal Flood Warning	GLD	Cheyenne, Sherman	3 hr
May 29, 11:37 PM CDT	Areal Flood Warning	GLD	Thomas	113 min

Nearby

Flash Flood Warnings in Kansas, 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.