Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 89, NWS Pueblo, CO

July 25, 2021Custer County, Huerfano County, Pueblo County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 25, 2021, 8:07 PM MDT for Custer County, Huerfano County, Pueblo County, Colorado. It was in force for 3 hr. 2 reports 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: Jul 25, 2021, 8:07 PM MDT (02:07 UTC)
Expired: Jul 25, 2021, 11:15 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Custer County, CO, Huerfano County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 92 km from the middle of the area, began a volume at 02:09 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
Jul 25, 9:20 PM MDT	HEAVY RAIN 1.14	1 Wsw Rye, CO
Jul 25, 11:15 PM MDT	HEAVY RAIN 1.16	1 Sse Beulah, CO

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, 2.1 hours before the alert went out and 260 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: 708 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 2464 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

117 
WGUS55 KPUB 260207
FFWPUB
COC027-055-101-260515-
/O.NEW.KPUB.FF.W.0089.210726T0207Z-210726T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
807 PM MDT Sun Jul 25 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  East Central Custer County in southeastern Colorado...
  North Central Huerfano County in southeastern Colorado...
  West Central Pueblo County in southeastern Colorado...

* Until 1115 PM MDT.

* At 807 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Greenhorn Mountain, San Isabel, Beulah and Colorado City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3803 10521 3806 10520 3808 10519 3807 10514
      3809 10505 3810 10500 3808 10496 3806 10496
      3799 10498 3797 10500 3796 10496 3789 10494
      3785 10500 3796 10515

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

KS

2 follow-up statements

627 
WGUS75 KPUB 260303
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
903 PM MDT Sun Jul 25 2021

COC027-055-101-260515-
/O.CON.KPUB.FF.W.0089.000000T0000Z-210726T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Huerfano CO-Pueblo CO-
903 PM MDT Sun Jul 25 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT THIS 
EVENING FOR EAST CENTRAL CUSTER, NORTH CENTRAL HUERFANO AND WEST 
CENTRAL PUEBLO COUNTIES...

At 903 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 2 inches of rain have 
fallen. Flash flooding is ongoing or expected to begin shortly. 
Heaviest rain is now east of the warned area, but flash flooding is 
still expected as water continues to run off.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Greenhorn Mountain, San Isabel, Beulah and Colorado City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3803 10521 3806 10520 3808 10519 3807 10514
      3809 10505 3810 10500 3808 10496 3806 10496
      3799 10498 3797 10500 3796 10496 3789 10494
      3785 10500 3796 10515

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

KS

064 
WGUS75 KPUB 260508
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
1108 PM MDT Sun Jul 25 2021

COC027-055-101-260518-
/O.EXP.KPUB.FF.W.0089.000000T0000Z-210726T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Huerfano CO-Pueblo CO-
1108 PM MDT Sun Jul 25 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1115 PM MDT THIS EVENING FOR 
EAST CENTRAL CUSTER, NORTH CENTRAL HUERFANO AND WEST CENTRAL PUEBLO 
COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures. Light rain is ongoing over the region but flash 
flooding is not expected.

LAT...LON 3803 10521 3806 10520 3808 10519 3807 10514
      3809 10505 3810 10500 3808 10496 3806 10496
      3799 10498 3797 10500 3796 10496 3789 10494
      3785 10500 3796 10515

$$

KS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 6:05 PM MDT	Special Weather Statement	PUB	Fremont	55 min
Jul 25, 6:33 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Fremont	3 hr
Jul 25, 6:45 PM MDT	Special Weather Statement	PUB	Prowers	45 min
Jul 25, 7:11 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Custer, Fremont	3 hr
Jul 25, 7:27 PM MDT	Special Weather Statement	PUB	Custer	48 min
Jul 25, 7:48 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Custer, Fremont, Pueblo	3 hr
Jul 26, 3:56 PM MDT	Special Weather Statement	PUB	Las Animas	49 min
Jul 26, 4:48 PM MDT	Special Weather Statement	PUB		42 min
Jul 26, 5:35 PM MDT	Special Weather Statement	PUB	Baca	40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.