Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 27, NWS Pueblo, CO

July 1, 2021Chaffee County, Fremont County, Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 1, 2021, 8:52 PM MDT for Chaffee County, Fremont County, Saguache County, Colorado. It was in force for 2 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 1, 2021, 8:52 PM MDT (02:52 UTC)
Expired
Jul 1, 2021, 11:15 PM MDT
In force
2 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 02:53 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, 2.9 hours before the alert went out and 230 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 00:00Z on 2021-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2021-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
42 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
2990 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

891 
WGUS55 KPUB 020252
FFWPUB
COC015-043-109-020600-
/O.NEW.KPUB.FF.W.0027.210702T0252Z-210702T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
852 PM MDT Thu Jul 1 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...
  Western Fremont County in central Colorado...
  Northeastern Saguache County in central Colorado...

* Until midnight MDT.

* At 852 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain over the Decker Burn Scar. Between 1 and 2 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

The heaviest rain occurring at 8:49 pm was on the north side of the 
Decker burn scar.

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 3848 10596 3848 10593
      3840 10596 3838 10596 3841 10605

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

$$

Hodanish
1 follow-up statement
806 
WGUS75 KPUB 020515
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
1115 PM MDT Thu Jul 1 2021

COC015-043-109-020525-
/O.CAN.KPUB.FF.W.0027.000000T0000Z-210702T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-Fremont CO-Saguache CO-
1115 PM MDT Thu Jul 1 2021

...FLASH FLOOD WARNING FOR THE DECKER BURN SCAR IS CANCELLED FOR 
SOUTHEASTERN CHAFFEE, WESTERN FREMONT AND NORTHEASTERN SAGUACHE 
COUNTIES...

The rain has ended. Flooding is no longer expected to pose a threat 
over the Decker Burn scar. Please continue to heed remaining road 
closures.

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

LAT...LON 3845 10603 3849 10602 3848 10596 3848 10593
      3840 10596 3838 10596 3841 10605

$$

Hodanish

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 6:03 PM MDTSpecial Weather StatementPUBOtero42 min
Jul 1, 6:08 PM MDTSpecial Weather StatementPUBCuster37 min
Jul 1, 6:23 PM MDTSpecial Weather StatementPUBFremont37 min
Jul 1, 6:46 PM MDTSpecial Weather StatementPUBOtero44 min
Jul 1, 6:51 PM MDTSpecial Weather StatementPUBFremont39 min
Jul 1, 6:56 PM MDTSevere Thunderstorm WarningPUBOtero34 min
Jul 1, 7:08 PM MDTFlash Flood WarningPUBOtero2 hr
Jul 1, 7:29 PM MDTSpecial Weather StatementPUBFremont46 min
Jul 1, 7:32 PM MDTSpecial Weather StatementPUBLas Animas43 min
Jul 1, 9:09 PM MDTFlash Flood WarningPUBFremont, Pueblo2 hr
Jul 1, 9:58 PM MDTFlash Flood WarningPUBCrowley, El Paso, Pueblo3 hr
Jul 1, 10:27 PM MDTFlash Flood WarningPUBChaffee, El Paso, Fremont, Teller66 min
Jul 2, 12:58 PM MDTFlash Flood Warning Considerable damage threatPUBChaffee3 hr
Jul 2, 3:00 PM MDTSpecial Weather StatementPUBHuerfano45 min
Jul 2, 3:31 PM MDTSpecial Weather StatementPUBCuster44 min
Jul 2, 3:32 PM MDTSpecial Weather StatementPUBFremont43 min
Jul 2, 4:11 PM MDTSpecial Weather StatementPUBCostilla34 min
Jul 2, 4:33 PM MDTFlash Flood Warning Considerable damage threatPUBCostilla, Huerfano3 hr
Jul 2, 4:52 PM MDTFlash Flood Warning Considerable damage threatPUBCostilla, Huerfano3 hr
Jul 2, 5:04 PM MDTSpecial Weather StatementPUBCostilla41 min
Jul 2, 5:06 PM MDTSevere Thunderstorm WarningPUBCostilla18 min
Jul 2, 5:30 PM MDTSevere Thunderstorm WarningPUBHuerfano30 min
Jul 2, 5:52 PM MDTFlash Flood WarningPUBHuerfano97 min
Jul 2, 5:55 PM MDTSevere Thunderstorm WarningPUBHuerfano, Las Animas23 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.