Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 68, NWS Pueblo, CO

July 23, 2021Chaffee County, Fremont County, Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 23, 2021, 3:34 PM MDT for Chaffee County, Fremont County, Saguache County, Colorado. It was in force for 3 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: Jul 23, 2021, 3:34 PM MDT (21:34 UTC)
Expired: Jul 23, 2021, 6:45 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Chaffee County, CO, Fremont County, CO, Saguache County, CO

The radar

The Pueblo radar (KPUX), 158 km from the middle of the area, began a volume at 21:37 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 12:00Z, 9.6 hours before the alert went out and 229 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: 21 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 1904 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

325 
WGUS55 KPUB 232134
FFWPUB
COC015-043-109-240045-
/O.NEW.KPUB.FF.W.0068.210723T2134Z-210724T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
334 PM MDT Fri Jul 23 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  The Decker Burn Scar in...
  Southeastern Chaffee County in central Colorado...
  West Central Fremont County in central Colorado...
  Northeastern Saguache County in central Colorado...

* Until 645 PM MDT.

* At 334 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain over the Decker Burn Scar. Between 0.5 and 1 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

Excessive rainfall over the warning area will cause mud slides near 
steep terrain. The mud slide can consist of rock, mud, vegetation 
and other loose materials.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding in and around the Decker Burn
           Scar.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of areas in and around
           the Decker Burn Scar.

* Some locations that will experience flash flooding include...
  Decker Burn Scar.

This includes the following high risk locations...
	County Road 49 and Bear Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Decker Burn Scar. Severe debris flows can also be 
anticipated across roads. Roads and driveways may be washed away in 
places. If you encounter flood waters...climb to safety.

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

&&

LAT...LON 3845 10603 3849 10602 3849 10596 3849 10594
      3843 10596 3843 10601 3843 10604

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

$$

Rodriguez

3 follow-up statements

803 
WGUS75 KPUB 232248 RRA
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
448 PM MDT Fri Jul 23 2021

COC015-043-109-240045-
/O.CON.KPUB.FF.W.0068.000000T0000Z-210724T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
448 PM MDT Fri Jul 23 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR REMAINS IN EFFECT 
UNTIL 645 PM MDT THIS EVENING FOR SOUTHEASTERN CHAFFEE, WEST CENTRAL 
FREMONT AND NORTHEASTERN SAGUACHE COUNTIES...

At 448 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain over the Decker Burn Scar. Between 1 and 2 inches of rain have 
fallen. The expected rainfall rate is 0.25 inches in 1 hour. Flash 
flooding is ongoing or expected to begin shortly.

Excessive rainfall over the warning area will cause mud slides near 
steep terrain. The mud slide can consist of rock, mud, vegetation 
and other loose materials.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding in and around the Decker Burn Scar.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of areas in and around
         the Decker Burn Scar.

Some locations that will experience flash flooding include...
  Decker Burn Scar.

This includes the following high risk locations...
	County Road 49 and Bear Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Decker Burn Scar. Severe debris flows can also be 
anticipated across roads. Roads and driveways may be washed away in 
places. If you encounter flood waters...climb to safety.

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

&&

LAT...LON 3845 10603 3849 10602 3849 10596 3849 10594
      3843 10596 3843 10601 3843 10604

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.25 INCHES IN 1 HOUR

$$

KS

430 
WGUS75 KPUB 232350
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
550 PM MDT Fri Jul 23 2021

COC015-043-109-240045-
/O.CON.KPUB.FF.W.0068.000000T0000Z-210724T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
550 PM MDT Fri Jul 23 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR REMAINS IN EFFECT 
UNTIL 645 PM MDT THIS EVENING FOR SOUTHEASTERN CHAFFEE, WEST CENTRAL 
FREMONT AND NORTHEASTERN SAGUACHE COUNTIES...

At 550 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain over the Decker Burn Scar. Between 1 and 2 inches of rain have 
fallen. The expected rainfall rate is 0.25 inches in 1 hour. Flash 
flooding is ongoing or expected to begin shortly.

Excessive rainfall over the warning area will cause mud slides near 
steep terrain. The mud slide can consist of rock, mud, vegetation 
and other loose materials.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding in and around the Decker Burn Scar.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of areas in and around
         the Decker Burn Scar.

Some locations that will experience flash flooding include...
  Decker Burn Scar.

This includes the following high risk locations...
	County Road 49 and Bear Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Decker Burn Scar. Severe debris flows can also be 
anticipated across roads. Roads and driveways may be washed away in 
places. If you encounter flood waters...climb to safety.

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

&&

LAT...LON 3845 10603 3849 10602 3849 10596 3849 10594
      3843 10596 3843 10601 3843 10604

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.25 INCHES IN 1 HOUR

$$

KS

855 
WGUS75 KPUB 240036
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
636 PM MDT Fri Jul 23 2021

COC015-043-109-240046-
/O.EXP.KPUB.FF.W.0068.000000T0000Z-210724T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
636 PM MDT Fri Jul 23 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR WILL EXPIRE AT 645 
PM MDT THIS EVENING FOR SOUTHEASTERN CHAFFEE, WEST CENTRAL FREMONT 
AND NORTHEASTERN SAGUACHE 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. There are thunderstorms east of the burn scar that 
are traveling towards west, so another issuance may be possible in 
the future.

A Flash Flood Watch remains in effect until 1200 AM MDT for portions 
of central Colorado, south central Colorado and southeast Colorado.

LAT...LON 3845 10603 3849 10602 3849 10596 3849 10594
      3843 10596 3843 10601 3843 10604

$$

KS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:06 AM MDT	Flash Flood Watch	PUB	Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 5 more	19 hr
Jul 23, 2:47 PM MDT	Special Weather Statement	PUB	Chaffee	43 min
Jul 23, 3:24 PM MDT	Flash Flood Warning	PUB	Saguache	3 hr
Jul 23, 3:42 PM MDT	Special Weather Statement	PUB	Lake	48 min
Jul 23, 4:53 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Chaffee	5 hr
Jul 23, 5:19 PM MDT	Flash Flood Warning	PUB	Saguache	3 hr
Jul 23, 5:27 PM MDT	Special Weather Statement	PUB	Saguache	48 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.