Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 85, NWS Pueblo, CO

July 25, 2021Fremont County, Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 25, 2021, 5:55 PM MDT for 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 25, 2021, 5:55 PM MDT (23:55 UTC)
Expired
Jul 25, 2021, 9:00 PM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

Counties Fremont County, CO, Saguache County, CO

The radar

The Pueblo radar (KPUX), 155 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 234 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-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2021-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2021-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2095 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

132 
WGUS55 KPUB 252355
FFWPUB
COC043-109-260300-
/O.NEW.KPUB.FF.W.0085.210725T2355Z-210726T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  The Decker Burn Scar in...
  Western Fremont County in central Colorado...
  North Central Saguache County in central Colorado...

* Until 900 PM MDT.

* At 555 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain over the Decker Burn Scar. Between 1 and 1.5 inches of 
  rain have fallen. The expected rainfall rate is 1.25 to 2.5 inches 
  in 1 hour. Flash flooding is ongoing or expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Bear Creek. The debris flow 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...
  Eastern 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.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

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

&&

LAT...LON 3840 10600 3846 10599 3847 10595 3845 10590
      3841 10590 3839 10596 3840 10599

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1.25-2.5 INCHES IN 1 HOUR

$$

KS
2 follow-up statements
653 
WGUS75 KPUB 260123
FFSPUB

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

COC043-109-260300-
/O.CON.KPUB.FF.W.0085.000000T0000Z-210726T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Saguache CO-
723 PM MDT Sun Jul 25 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR REMAINS IN EFFECT 
UNTIL 9 PM MDT THIS EVENING FOR WESTERN FREMONT AND NORTH CENTRAL 
SAGUACHE COUNTIES...

At 723 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain over the Decker Burn Scar. Between 1 and 1.5 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly. 
Lighter rain is now over the burn scar.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Bear Creek. The debris flow 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...
  Eastern 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.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

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

&&

LAT...LON 3840 10600 3846 10599 3847 10595 3845 10590
      3841 10590 3839 10596 3840 10599

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

$$

KS
841 
WGUS75 KPUB 260251
FFSPUB

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

COC043-109-260301-
/O.EXP.KPUB.FF.W.0085.000000T0000Z-210726T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Saguache CO-
851 PM MDT Sun Jul 25 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR WILL EXPIRE AT 9 PM 
MDT THIS EVENING FOR WESTERN FREMONT AND NORTH CENTRAL 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 is light rain over the burn scar right now, but 
flash flooding is not expected anymore.

LAT...LON 3840 10600 3846 10599 3847 10595 3845 10590
      3841 10590 3839 10596 3840 10599

$$

KS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 6:39 PM MDTSpecial Weather StatementPUBAlamosa51 min
Jul 24, 8:49 PM MDTFlash Flood WarningPUBCuster, Saguache92 min
Jul 25, 12:24 PM MDTSpecial Weather StatementPUBHuerfano21 min
Jul 25, 12:31 PM MDTFlash Flood Warning Considerable damage threatPUBCostilla, Huerfano3 hr
Jul 25, 1:09 PM MDTFlash Flood Warning Considerable damage threatPUBHuerfano3 hr
Jul 25, 2:29 PM MDTSpecial Weather StatementPUBKiowa46 min
Jul 25, 2:58 PM MDTSevere Thunderstorm WarningPUBKiowa62 min
Jul 25, 3:21 PM MDTSpecial Weather StatementPUBKiowa39 min
Jul 25, 3:37 PM MDTSevere Thunderstorm WarningPUBKiowa68 min
Jul 25, 4:38 PM MDTSpecial Weather StatementPUBEl Paso52 min
Jul 25, 4:45 PM MDTSpecial Weather StatementPUBChaffee60 min
Jul 25, 4:48 PM MDTSpecial Weather StatementPUBBent, Kiowa57 min
Jul 25, 4:49 PM MDTSpecial Weather StatementPUBFremont56 min
Jul 25, 4:51 PM MDTSpecial Weather StatementPUBTeller39 min
Jul 25, 4:53 PM MDTSpecial Weather StatementPUBDouglas37 min
Jul 25, 5:05 PM MDTSpecial Weather StatementPUBCrowley, Otero, Pueblo40 min
Jul 25, 5:07 PM MDTSpecial Weather StatementPUBEl Paso53 min
Jul 25, 5:09 PM MDTSpecial Weather StatementPUBFremont51 min
Jul 25, 5:15 PM MDTSpecial Weather StatementPUBBaca30 min
Jul 25, 5:48 PM MDTSevere Thunderstorm WarningPUBProwers55 min
Jul 25, 5:58 PM MDTSpecial Weather StatementPUBBent, Otero, Pueblo47 min

Nearby

Flash Flood Warnings in Colorado, 2021Every 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.