Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 19, NWS Goodland, KS

May 25, 2021Kit Carson County, Colorado

NWS Goodland, KS issued this flash flood warning at May 25, 2021, 1:45 AM MDT for Kit Carson County, Colorado. It was in force for 92 min. 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 25, 2021, 1:45 AM MDT (07:45 UTC)
Expired: May 25, 2021, 3:17 AM MDT
In force: 92 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Flood severity: None

County Kit Carson County, CO

The radar

The Goodland radar (KGLD), 38 km from the middle of the area, began a volume at 07:47 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, 7.8 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3201 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

427 
WGUS53 KGLD 250745
FFWGLD
COC063-251015-
/O.NEW.KGLD.FF.W.0019.210525T0745Z-210525T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
145 AM MDT Tue May 25 2021

The National Weather Service in Goodland has issued a

* Flash Flood Warning for...
  Northeastern Kit Carson County in east central Colorado...

* Until 415 AM MDT.

* At 145 AM 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...
  Burlington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3931 10205 3929 10233 3952 10241 3957 10209
      3956 10206 3952 10205 3931 10206

FLASH FLOOD...RADAR INDICATED

$$

JN

3 follow-up statements

106 
WGUS73 KGLD 250810
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
210 AM MDT Tue May 25 2021

COC063-251015-
/O.CON.KGLD.FF.W.0019.000000T0000Z-210525T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kit Carson CO-
210 AM MDT Tue May 25 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT EARLY THIS 
MORNING FOR NORTHEASTERN KIT CARSON COUNTY...

At 209 AM 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...
  Burlington.

This includes the following highways...
	Interstate 70 in Colorado between mile markers 441 and 449.
	Highway 385 between mile markers 188 and 205...and
	near mile marker 211.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3931 10205 3929 10233 3952 10241 3957 10209
      3956 10206 3952 10205 3931 10206

FLASH FLOOD...RADAR INDICATED

$$

JN

847 
WGUS73 KGLD 250811
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
211 AM MDT Tue May 25 2021

COC063-251015-
/O.CON.KGLD.FF.W.0019.000000T0000Z-210525T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kit Carson CO-
211 AM MDT Tue May 25 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT EARLY THIS 
MORNING FOR NORTHEASTERN KIT CARSON COUNTY...

At 210 AM 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...
  Burlington.

This includes the following highways...
	Interstate 70 in Colorado between mile markers 441 and 449.
	Highway 385 between mile markers 188 and 205...and
	near mile marker 211.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3931 10205 3929 10233 3952 10241 3957 10209
      3956 10206 3952 10205 3931 10206

FLASH FLOOD...RADAR INDICATED

$$

JN

031 
WGUS73 KGLD 250917
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
317 AM MDT Tue May 25 2021

COC063-250927-
/O.CAN.KGLD.FF.W.0019.000000T0000Z-210525T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kit Carson CO-
317 AM MDT Tue May 25 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN KIT CARSON 
COUNTY...

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

LAT...LON 3931 10205 3929 10233 3952 10241 3957 10209
      3956 10206 3952 10205 3931 10206

$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 9:57 PM MDT	Dense Fog Advisory	GLD	Cheyenne, Kit Carson, Yuma	7 hr
May 25, 1:11 AM MDT	Special Weather Statement	GLD	Kit Carson	34 min
May 25, 1:41 AM MDT	Special Weather Statement	GLD	Kit Carson	34 min
May 25, 3:20 AM MDT	Areal Flood Warning	GLD	Kit Carson	3 hr

Nearby

Flash Flood Warnings in Colorado, 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.