Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 50, NWS Pueblo, CO

July 13, 2021Chaffee County, Fremont County, Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 13, 2021, 3:01 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 13, 2021, 3:01 PM MDT (21:01 UTC)
Expired: Jul 13, 2021, 6:00 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), 163 km from the middle of the area, began a volume at 21:04 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, 9.0 hours before the alert went out and 226 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: 27 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 3436 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

226 
WGUS55 KPUB 132101
FFWPUB
COC015-043-109-140000-
/O.NEW.KPUB.FF.W.0050.210713T2101Z-210714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
301 PM MDT Tue Jul 13 2021

The National Weather Service in Pueblo has issued a

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

* Until 600 PM MDT.

* At 301 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain over western portions of the Decker Burn Scar and over 
  Poncha Pass. 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 and Poncha Pass.

Travelers on Highway 285 over and near Poncha Pass may encounter mud 
and debris flows.

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 3842 10614 3845 10615 3848 10603 3846 10600
      3841 10594 3839 10596 3834 10603 3838 10613

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

$$

KAM

2 follow-up statements

088 
WGUS75 KPUB 132236
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
436 PM MDT Tue Jul 13 2021

COC015-043-109-140000-
/O.CON.KPUB.FF.W.0050.000000T0000Z-210714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
436 PM MDT Tue Jul 13 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR REMAINS IN EFFECT 
UNTIL 6 PM MDT THIS EVENING FOR SOUTH CENTRAL CHAFFEE, WESTERN 
FREMONT AND NORTHEASTERN SAGUACHE COUNTIES...

At 436 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain over the Decker Burn Scar. Up to 1 inch of rain has fallen. 
Additional rainfall amounts up to 1 inch are possible in the warned 
area. 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 and Poncha Pass.

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 3842 10614 3845 10615 3848 10603 3846 10600
      3841 10594 3839 10596 3834 10603 3838 10613

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

$$

Moore

692 
WGUS75 KPUB 132355
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
555 PM MDT Tue Jul 13 2021

COC015-043-109-140005-
/O.EXP.KPUB.FF.W.0050.000000T0000Z-210714T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
555 PM MDT Tue Jul 13 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR WILL EXPIRE AT 6 PM 
MDT THIS EVENING FOR SOUTH CENTRAL CHAFFEE, WESTERN FREMONT AND 
NORTHEASTERN SAGUACHE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3842 10614 3845 10615 3848 10603 3846 10600
      3841 10594 3839 10596 3834 10603 3838 10613

$$

Moore

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 12:50 PM MDT	Special Weather Statement	PUB	Teller	40 min
Jul 13, 1:08 PM MDT	Severe Thunderstorm Warning	PUB	Teller	21 min
Jul 13, 1:24 PM MDT	Special Weather Statement	PUB	Chaffee	36 min
Jul 13, 1:29 PM MDT	Special Weather Statement	PUB	Teller	31 min
Jul 13, 2:50 PM MDT	Special Weather Statement	PUB	Saguache	25 min
Jul 13, 3:11 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Custer, Fremont, Saguache	3 hr
Jul 13, 4:18 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Chaffee	3 hr
Jul 13, 4:22 PM MDT	Special Weather Statement	PUB	Huerfano	38 min
Jul 13, 4:43 PM MDT	Severe Thunderstorm Warning	PUB	Huerfano	32 min
Jul 13, 4:56 PM MDT	Special Weather Statement	PUB	Huerfano	34 min
Jul 13, 5:15 PM MDT	Special Weather Statement	PUB	Las Animas	45 min
Jul 13, 5:27 PM MDT	Special Weather Statement	PUB	Huerfano	48 min
Jul 13, 5:29 PM MDT	Special Weather Statement	PUB	Otero	46 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.