Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 123, NWS Pueblo, CO
NWS Pueblo, CO issued this flash flood warning at Aug 15, 2021, 2:01 AM MDT for Costilla County, Huerfano 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
- Aug 15, 2021, 2:01 AM MDT (08:01 UTC)
- Expired
- Aug 15, 2021, 4:33 AM MDT
- In force
- 3 hr
- Issued by
- NWS Pueblo, CO
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Costilla County, CO, Huerfano County, CO
The radar
The Pueblo radar (KPUX), 133 km from the middle of the area, began a volume at 08:02 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
Albuquerq/Krtlnd, NM (KABQ), launched 00:00Z, 8.0 hours before the alert went out and 306 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.
- Mixed-layer CAPE
- 51 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 2052 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
225
WGUS55 KPUB 150801
FFWPUB
COC023-055-151100-
/O.NEW.KPUB.FF.W.0123.210815T0801Z-210815T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
201 AM MDT Sun Aug 15 2021
The National Weather Service in Pueblo has issued a
* Flash Flood Warning for...
Central portions of the Spring Burn Scar in...
Northeastern Costilla County in south central Colorado...
Central Huerfano County in southeastern Colorado...
* Until 500 AM MDT.
* At 201 AM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Spring Burn Scar. Between 0.5 and 1.2 inches
of rain have fallen. Additional rainfall amounts of 0.1 to 0.3
inch are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
Excessive rainfall over the warning area may 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 Spring Burn
Scar.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of areas in and around
the Spring Burn Scar.
* Some locations that may experience flash flooding include...
Spring Burn Scar south of Highway 160 in Costilla county,
northwestern Spring Burn Scar south of Highway 160 in Huerfano
county and southern Spring Burn Scar north of Highway 160.
This includes the following high risk locations...
South Abeyta Creek near County Road 443 and South Abeyta Creek near
County Road 442.
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 Spring 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.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3748 10528 3749 10530 3752 10528 3753 10525
3755 10524 3758 10523 3761 10520 3761 10514
3759 10508 3757 10507 3756 10507 3755 10508
3757 10511 3757 10512 3755 10512 3755 10511
3753 10510 3751 10511
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Cohen2 follow-up statements
752
WGUS75 KPUB 150913
FFSPUB
Flash Flood Statement
National Weather Service Pueblo CO
313 AM MDT Sun Aug 15 2021
COC023-055-151100-
/O.CON.KPUB.FF.W.0123.000000T0000Z-210815T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-Huerfano CO-
313 AM MDT Sun Aug 15 2021
...FLASH FLOOD WARNING FOR CENTRAL PORTIONS OF THE SPRING BURN SCAR
REMAINS IN EFFECT UNTIL 5 AM MDT EARLY THIS MORNING FOR NORTHEASTERN
COSTILLA AND CENTRAL HUERFANO COUNTIES...
At 313 AM MDT, Doppler radar indicated that earlier thunderstorms
produced heavy rain, with rainfall accumulations between 0.6 and 1.3
inches. While shower and thunderstorm activity has diminished, flash
flooding could still be ongoing.
Earlier excessive rainfall over the warning area could cause mud
slides near steep terrain. The mud slide can consist of rock, mud,
vegetation and other loose materials.
HAZARD...Life threatening flash flooding. Earlier thunderstorms
producing flash flooding in and around the Spring Burn
Scar.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of areas in and around
the Spring Burn Scar.
Some locations that will experience flash flooding include...
Spring Burn Scar south of Highway 160 in Costilla county,
northwestern Spring Burn Scar south of Highway 160 in Huerfano
county and southern Spring Burn Scar north of Highway 160.
This includes the following high risk locations...
South Abeyta Creek near County Road 443 and South Abeyta Creek near
County Road 442.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life threatening situation. Earlier heavy rainfall may
cause extensive and severe flash flooding of creeks...streams...and
ditches in the Spring 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.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3748 10528 3749 10530 3752 10528 3753 10525
3755 10524 3758 10523 3761 10520 3761 10514
3759 10508 3757 10507 3756 10507 3755 10508
3757 10511 3757 10512 3755 10512 3755 10511
3753 10510 3751 10511
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Cohen245
WGUS75 KPUB 151033
FFSPUB
Flash Flood Statement
National Weather Service Pueblo CO
433 AM MDT Sun Aug 15 2021
COC023-055-151043-
/O.CAN.KPUB.FF.W.0123.000000T0000Z-210815T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-Huerfano CO-
433 AM MDT Sun Aug 15 2021
...FLASH FLOOD WARNING FOR THE SPRING BURN SCAR IS CANCELLED FOR
NORTHEASTERN COSTILLA AND CENTRAL HUERFANO COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
significant threat. Please continue to heed remaining road closures.
LAT...LON 3748 10528 3749 10530 3752 10528 3753 10525
3755 10524 3758 10523 3761 10520 3761 10514
3759 10508 3757 10507 3756 10507 3755 10508
3757 10511 3757 10512 3755 10512 3755 10511
3753 10510 3751 10511
$$
CohenThe office that day
Everything else NWS Pueblo, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 7:15 PM MDT | Special Weather Statement | PUB | Saguache | 30 min |
| Aug 14, 7:41 PM MDT | Special Weather Statement | PUB | Saguache | 34 min |
| Aug 14, 9:37 PM MDT | Special Weather Statement | PUB | El Paso | 23 min |
| Aug 15, 1:05 PM MDT | Flash Flood Watch | PUB | Alamosa, Chaffee, Costilla, Custer, Fremont, Huerfano and 3 more | 7 hr |
| Aug 15, 1:50 PM MDT | Flash Flood Warning | PUB | Chaffee, Saguache | 2 hr |
| Aug 15, 2:24 PM MDT | Special Weather Statement | PUB | El Paso | 36 min |
| Aug 15, 2:58 PM MDT | Special Weather Statement | PUB | Custer | 32 min |
| Aug 15, 3:01 PM MDT | Special Weather Statement | PUB | Chaffee | 29 min |
| Aug 15, 3:08 PM MDT | Flash Flood Warning | PUB | Chaffee | 2 hr |
| Aug 15, 4:16 PM MDT | Special Weather Statement | PUB | Crowley, Pueblo | 44 min |
| Aug 15, 4:38 PM MDT | Special Weather Statement | PUB | Huerfano | 52 min |
| Aug 15, 5:18 PM MDT | Special Weather Statement | PUB | Crowley | 27 min |
| Aug 15, 5:54 PM MDT | Special Weather Statement | PUB | Las Animas | 36 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.