Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 31, NWS Pueblo, CO

July 2, 2021Chaffee County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 2, 2021, 12:58 PM MDT for Chaffee County, Colorado. It was in force for 3 hr. 1 report 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 2, 2021, 12:58 PM MDT (18:58 UTC)
Expired: Jul 2, 2021, 3:40 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Chaffee County, CO

The radar

The Grand Junction radar (KGJX), 177 km from the middle of the area, began a volume at 19:01 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 2, 1:22 PM MDT	FLASH FLOOD	5 W Nathrop, CO	1-3 FEET OF WATER AND MUD OVER COUNTY ROAD 162. LOCATION IS APPROXIMATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 7.0 hours before the alert went out and 203 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: 6 J/kg
Mixed-layer CIN: -312 J/kg
Mixed-layer LCL: 2341 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

948 
WGUS55 KPUB 021858
FFWPUB
COC015-022200-
/O.NEW.KPUB.FF.W.0031.210702T1858Z-210702T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
1258 PM MDT Fri Jul 2 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Central Chaffee County in central Colorado...

* Until 400 PM MDT.

* At 1258 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 0.5 to 1 inch of rain has 
  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...
  Alpine.

This includes the following streams and drainages...
  Baldwin Creek, South Cottonwood Creek, Arkansas River, Chalk Creek 
  and Eddy Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3875 10614 3869 10616 3870 10629 3877 10629
      3877 10625

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

$$

Rodriguez

2 follow-up statements

912 
WGUS75 KPUB 021959
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
159 PM MDT Fri Jul 2 2021

COC015-022200-
/O.CON.KPUB.FF.W.0031.000000T0000Z-210702T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-
159 PM MDT Fri Jul 2 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM MDT THIS 
AFTERNOON FOR CENTRAL CHAFFEE COUNTY...

At 159 PM MDT, Thunderstorms producing heavy rain have ended for the 
time being, though 1-3 feet of water and mud has been reported near 
the junction of County Roads 162 and 321, just west of Mt. Princeton 
Hot Springs. Flash flooding is occurring.

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...
  Alpine.

This includes the following streams and drainages...
  Baldwin Creek, South Cottonwood Creek, Arkansas River, Chalk Creek 
  and Eddy Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3875 10614 3869 10616 3870 10629 3877 10629
      3877 10625

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

$$

Rodriguez

342 
WGUS75 KPUB 022140
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
340 PM MDT Fri Jul 2 2021

COC015-022150-
/O.CAN.KPUB.FF.W.0031.000000T0000Z-210702T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chaffee CO-
340 PM MDT Fri Jul 2 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CHAFFEE COUNTY...

Flood waters have receded and the heavy rain has ended. Flooding is 
no longer expected to pose a threat. Please continue to heed 
remaining road closures.

LAT...LON 3875 10614 3869 10616 3870 10629 3877 10629
      3877 10625

$$

Rodriguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 6:03 PM MDT	Special Weather Statement	PUB	Otero	42 min
Jul 1, 6:08 PM MDT	Special Weather Statement	PUB	Custer	37 min
Jul 1, 6:23 PM MDT	Special Weather Statement	PUB	Fremont	37 min
Jul 1, 6:46 PM MDT	Special Weather Statement	PUB	Otero	44 min
Jul 1, 6:51 PM MDT	Special Weather Statement	PUB	Fremont	39 min
Jul 1, 6:56 PM MDT	Severe Thunderstorm Warning	PUB	Otero	34 min
Jul 1, 7:08 PM MDT	Flash Flood Warning	PUB	Otero	2 hr
Jul 1, 7:29 PM MDT	Special Weather Statement	PUB	Fremont	46 min
Jul 1, 7:32 PM MDT	Special Weather Statement	PUB	Las Animas	43 min
Jul 1, 8:52 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Chaffee, Fremont, Saguache	2 hr
Jul 1, 9:09 PM MDT	Flash Flood Warning	PUB	Fremont, Pueblo	2 hr
Jul 1, 9:58 PM MDT	Flash Flood Warning	PUB	Crowley, El Paso, Pueblo	3 hr
Jul 1, 10:27 PM MDT	Flash Flood Warning	PUB	Chaffee, El Paso, Fremont, Teller	66 min
Jul 2, 3:00 PM MDT	Special Weather Statement	PUB	Huerfano	45 min
Jul 2, 3:31 PM MDT	Special Weather Statement	PUB	Custer	44 min
Jul 2, 3:32 PM MDT	Special Weather Statement	PUB	Fremont	43 min
Jul 2, 4:11 PM MDT	Special Weather Statement	PUB	Costilla	34 min
Jul 2, 4:33 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 2, 4:52 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 2, 5:04 PM MDT	Special Weather Statement	PUB	Costilla	41 min
Jul 2, 5:06 PM MDT	Severe Thunderstorm Warning	PUB	Costilla	18 min
Jul 2, 5:30 PM MDT	Severe Thunderstorm Warning	PUB	Huerfano	30 min
Jul 2, 5:52 PM MDT	Flash Flood Warning	PUB	Huerfano	97 min
Jul 2, 5:55 PM MDT	Severe Thunderstorm Warning	PUB	Huerfano, Las Animas	23 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.