Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 82, NWS Pueblo, CO

July 24, 2021Custer County, Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 24, 2021, 8:49 PM MDT for Custer County, Saguache 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: Jul 24, 2021, 8:49 PM MDT (02:49 UTC)
Expired: Jul 24, 2021, 10:21 PM MDT
In force: 92 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

Counties Custer County, CO, Saguache County, CO

The radar

The Pueblo radar (KPUX), 134 km from the middle of the area, began a volume at 02:52 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

Grand Junction, CO (KGJT), launched 00:00Z, 2.8 hours before the alert went out and 283 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: 50 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 2806 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

113 
WGUS55 KPUB 250249
FFWPUB
COC027-109-250545-
/O.NEW.KPUB.FF.W.0082.210725T0249Z-210725T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
849 PM MDT Sat Jul 24 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  East Central Saguache County in central Colorado...
  South Central Custer County in southeastern Colorado...

* Until 1145 PM MDT.

* At 849 PM MDT, emergency management reported flooding ongoing in 
  Willow Creek and Cottonwood Creek. Between 1 and 3 inches of rain 
  fell earlier this evening. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  IMPACT...Flash flooding of small creeks and streams, mountain
           roads, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Crestone, and Baca Grande.

This includes the following streams and drainages...
  San Luis Creek, Venable Creek, Willow Creek, Spanish Creek, San 
  Isabel Creek, Crestone Creek, Stanton Creek, Alpine Creek, 
  Alvarado Creek, Alto Creek, Rito, Horn Creek, South Crestone 
  Creek, North Colony Creek, Hudson Creek, Middle Fork North 
  Crestone Creek, McKenney Creek, Middle Colony Creek, Mill Creek, 
  Deadman Creek, Lake Fork North Crestone Creek and Cottonwood Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3806 10563 3804 10561 3802 10560 3801 10560
      3798 10558 3797 10558 3795 10556 3796 10555
      3796 10553 3793 10551 3788 10555 3788 10562
      3804 10573 3806 10568

FLASH FLOOD...OBSERVED

$$

KT

2 follow-up statements

395 
WGUS75 KPUB 250359
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
959 PM MDT Sat Jul 24 2021

COC027-109-250545-
/O.CON.KPUB.FF.W.0082.000000T0000Z-210725T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Saguache CO-
959 PM MDT Sat Jul 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM MDT THIS 
EVENING FOR EAST CENTRAL SAGUACHE AND SOUTH CENTRAL CUSTER 
COUNTIES...

At 959 PM MDT, emergency management reported flooding ongoing in 
Willow Creek and Cottonwood Creek. Between 1 and 3 inches of rain 
fell earlier this evening. Flash flooding is still occurring. Some 
additional light rain will fall over the area through 1100 PM.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flash flooding of small creeks and streams, mountain
         roads, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Crestone, and Baca Grande.

This includes the following streams and drainages...
  Willow Creek and Cottonwood Creek.  

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.

&&

LAT...LON 3806 10563 3804 10561 3802 10560 3801 10560
      3798 10558 3797 10558 3795 10556 3796 10555
      3796 10553 3793 10551 3788 10555 3788 10562
      3804 10573 3806 10568

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...0.25 INCHES IN 1 HOUR

$$

KT

468 
WGUS75 KPUB 250421
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
1021 PM MDT Sat Jul 24 2021

COC027-109-250431-
/O.CAN.KPUB.FF.W.0082.000000T0000Z-210725T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Saguache CO-
1021 PM MDT Sat Jul 24 2021

...FLASH FLOOD WARNING IS CANCELLED FOR EAST CENTRAL SAGUACHE AND 
SOUTH CENTRAL CUSTER COUNTIES...

Emergency Management reports flood waters have receded, though 
creeks and streams continue to run high. Flooding is no longer 
expected to pose a threat. Please continue to heed remaining road 
closures.

LAT...LON 3806 10563 3804 10561 3802 10560 3801 10560
      3798 10558 3797 10558 3795 10556 3796 10555
      3796 10553 3793 10551 3788 10555 3788 10562
      3804 10573 3806 10568

$$

KT

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 6:39 PM MDT	Special Weather Statement	PUB	Alamosa	51 min
Jul 25, 12:24 PM MDT	Special Weather Statement	PUB	Huerfano	21 min
Jul 25, 12:31 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 25, 1:09 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Huerfano	3 hr
Jul 25, 2:29 PM MDT	Special Weather Statement	PUB	Kiowa	46 min
Jul 25, 2:58 PM MDT	Severe Thunderstorm Warning	PUB	Kiowa	62 min
Jul 25, 3:21 PM MDT	Special Weather Statement	PUB	Kiowa	39 min
Jul 25, 3:37 PM MDT	Severe Thunderstorm Warning	PUB	Kiowa	68 min
Jul 25, 4:38 PM MDT	Special Weather Statement	PUB	El Paso	52 min
Jul 25, 4:45 PM MDT	Special Weather Statement	PUB	Chaffee	60 min
Jul 25, 4:48 PM MDT	Special Weather Statement	PUB	Bent, Kiowa	57 min
Jul 25, 4:49 PM MDT	Special Weather Statement	PUB	Fremont	56 min
Jul 25, 4:51 PM MDT	Special Weather Statement	PUB	Teller	39 min
Jul 25, 4:53 PM MDT	Special Weather Statement	PUB	Douglas	37 min
Jul 25, 5:05 PM MDT	Special Weather Statement	PUB	Crowley, Otero, Pueblo	40 min
Jul 25, 5:07 PM MDT	Special Weather Statement	PUB	El Paso	53 min
Jul 25, 5:09 PM MDT	Special Weather Statement	PUB	Fremont	51 min
Jul 25, 5:15 PM MDT	Special Weather Statement	PUB	Baca	30 min
Jul 25, 5:48 PM MDT	Severe Thunderstorm Warning	PUB	Prowers	55 min
Jul 25, 5:55 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Fremont, Saguache	3 hr
Jul 25, 5:58 PM MDT	Special Weather Statement	PUB	Bent, Otero, Pueblo	47 min

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.