Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 11, NWS Goodland, KS

May 16, 2021Kit Carson County, Colorado

NWS Goodland, KS issued this flash flood warning at May 16, 2021, 7:22 PM MDT for Kit Carson County, Colorado. It was in force for 5 hr. 1 report 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: May 16, 2021, 7:22 PM MDT (01:22 UTC)
Expired: May 17, 2021, 12:08 AM MDT
In force: 5 hr
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Flood severity: None

County Kit Carson County, CO

The radar

The Goodland radar (KGLD), 108 km from the middle of the area, began a volume at 01:24 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
May 16, 9:10 PM MDT	HEAVY RAIN 1.11	Vona, CO	REPORTED VIA WEATHER UNDERGROUND. MESONET STATION KCOVONAA4 REPORTED 1.11 INCHES OF STORM TOTAL RAIN SINCE 5:45 PM MT. RAIN IS ONGOING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 1.4 hours before the alert went out and 69 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: 143 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 685 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

577 
WGUS53 KGLD 170122
FFWGLD
COC063-170430-
/O.NEW.KGLD.FF.W.0011.210517T0122Z-210517T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
722 PM MDT Sun May 16 2021

The National Weather Service in Goodland has issued a

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

* Until 1030 PM MDT.

* At 721 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...
  Flagler, Seibert and Vona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3954 10315 3954 10269 3921 10268 3904 10266
      3904 10316 3913 10316

FLASH FLOOD...RADAR INDICATED

$$

ANW

2 follow-up statements

292 
WGUS53 KGLD 170356
FFWGLD
COC063-170630-
/O.EXT.KGLD.FF.W.0011.000000T0000Z-210517T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
956 PM MDT Sun May 16 2021

The National Weather Service in Goodland has extended the

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

* Until 1230 AM MDT.

* At 954 PM MDT, Doppler radar indicated showers and thunderstorms 
  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...
  Flagler, Seibert and Vona.

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 flooding to your local law enforcement agency when you 
can do so safely.

&&

LAT...LON 3954 10315 3954 10269 3921 10268 3904 10266
      3904 10316 3913 10316

FLASH FLOOD...RADAR INDICATED

$$

ANW

140 
WGUS73 KGLD 170608
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
1208 AM MDT Mon May 17 2021

COC063-170618-
/O.CAN.KGLD.FF.W.0011.000000T0000Z-210517T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kit Carson CO-
1208 AM MDT Mon May 17 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WESTERN 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 3954 10315 3954 10269 3921 10268 3904 10266
      3904 10316 3913 10316

$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 6:04 PM MDT	Flash Flood Warning	GLD	Cheyenne	3 hr
May 16, 6:14 PM MDT	Special Weather Statement	GLD	Cheyenne	61 min
May 16, 6:40 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	35 min
May 16, 6:56 PM MDT	Tornado Warning	GLD	Kit Carson	18 min
May 16, 7:07 PM MDT	Special Weather Statement	GLD	Kit Carson	23 min
May 16, 7:10 PM MDT	Special Weather Statement	GLD	Kit Carson	35 min
May 16, 7:10 PM MDT	Tornado Warning	GLD	Cheyenne, Kit Carson	35 min
May 16, 7:16 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	29 min
May 16, 7:42 PM MDT	Special Weather Statement	GLD	Kit Carson	63 min
May 16, 7:58 PM MDT	Special Weather Statement	GLD	Kit Carson	47 min
May 16, 8:24 PM MDT	Flash Flood Warning	GLD	Kit Carson	4 hr
May 16, 8:39 PM MDT	Special Weather Statement	GLD	Yuma	66 min
May 16, 8:42 PM MDT	Special Weather Statement	GLD	Kit Carson	78 min
May 16, 8:49 PM MDT	Special Weather Statement	GLD	Cheyenne	71 min
May 16, 9:09 PM MDT	Areal Flood Warning	GLD	Cheyenne	3 hr
May 16, 9:52 PM MDT	Special Weather Statement	GLD	Yuma	53 min
May 16, 10:57 PM MDT	Special Weather Statement	GLD	Yuma	63 min
May 17, 12:12 AM MDT	Areal Flood Warning	GLD	Kit Carson	6 hr
May 17, 2:27 PM MDT	Flash Flood Warning	GLD	Yuma	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.