Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 102, NWS Pueblo, CO
NWS Pueblo, CO issued this flash flood warning at Jul 31, 2021, 5:43 PM MDT for Costilla County, Huerfano 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 31, 2021, 5:43 PM MDT (23:43 UTC)
- Expired
- Jul 31, 2021, 8:45 PM 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), 125 km from the middle of the area, began a volume at 23:44 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 31, 6:19 PM MDT | HEAVY RAIN 0.48 | 4 Ese La Veta Pass, CO | 0.24 OF THAT AMOUNT WAS RECORDED IN 15 MINUTES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 11.7 hours before the alert went out and 300 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
- 44 J/kg
- Mixed-layer CIN
- -277 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -71 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
361
WGUS55 KPUB 312343
FFWPUB
COC023-055-010245-
/O.NEW.KPUB.FF.W.0102.210731T2343Z-210801T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
543 PM MDT Sat Jul 31 2021
The National Weather Service in Pueblo has issued a
* Flash Flood Warning for...
The Spring Burn Scar in...
Northeastern Costilla County in south central Colorado...
Central Huerfano County in southeastern Colorado...
* Until 845 PM MDT.
* At 543 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Spring Burn Scar. Between 0.5 and 1 inch of
rain has fallen. Flash flooding is ongoing or expected to begin
shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the North Abeyta Creek, Dog Springs, and south Oak
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 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 north of Highway 160, northwestern Spring Burn
Scar south of Highway 160 in Huerfano county, northern Spring Burn
Scar south of Highway 160 in Costilla county and La Veta Pass.
This includes the following high risk locations...
South Abeyta Creek near County Road 443, South Abeyta Creek near
County Road 442 and South Abeyta Creek near County Road 441.
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.
&&
LAT...LON 3756 10519 3758 10522 3763 10521 3769 10513
3768 10503 3766 10500 3764 10499 3759 10502
3756 10505 3754 10510 3757 10516
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
KS2 follow-up statements
184
WGUS75 KPUB 010054
FFSPUB
Flash Flood Statement
National Weather Service Pueblo CO
654 PM MDT Sat Jul 31 2021
COC023-055-010245-
/O.CON.KPUB.FF.W.0102.000000T0000Z-210801T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-Huerfano CO-
654 PM MDT Sat Jul 31 2021
...FLASH FLOOD WARNING FOR THE SPRING BURN SCAR REMAINS IN EFFECT
UNTIL 845 PM MDT THIS EVENING FOR NORTHEASTERN COSTILLA AND CENTRAL
HUERFANO COUNTIES...
At 654 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain over the Spring Burn Scar. Between 1 and 2 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the North Abeyta Creek, Dog Springs, and south Oak
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 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 north of Highway 160, northwestern Spring Burn
Scar south of Highway 160 in Huerfano county, northern Spring Burn
Scar south of Highway 160 in Costilla county and La Veta Pass.
This includes the following high risk locations...
South Abeyta Creek near County Road 443, South Abeyta Creek near
County Road 442 and South Abeyta Creek near County Road 441.
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.
&&
LAT...LON 3756 10519 3758 10522 3763 10521 3769 10513
3768 10503 3766 10500 3764 10499 3759 10502
3756 10505 3754 10510 3757 10516
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
KS829
WGUS75 KPUB 010240 RRA
FFSPUB
Flash Flood Statement
National Weather Service Pueblo CO
840 PM MDT Sat Jul 31 2021
COC023-055-010250-
/O.EXP.KPUB.FF.W.0102.000000T0000Z-210801T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-Huerfano CO-
840 PM MDT Sat Jul 31 2021
...FLASH FLOOD WARNING FOR THE SPRING BURN SCAR WILL EXPIRE AT 845
PM MDT THIS EVENING FOR NORTHEASTERN COSTILLA AND CENTRAL HUERFANO
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.
A Flash Flood Watch remains in effect until 100 AM MDT for portions
of central Colorado, east central Colorado, south central Colorado
and southeast Colorado.
LAT...LON 3756 10519 3758 10522 3763 10521 3769 10513
3768 10503 3766 10500 3764 10499 3759 10502
3756 10505 3754 10510 3757 10516
$$
KSThe office that day
Everything else NWS Pueblo, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 6:13 PM MDT | Special Weather Statement | PUB | Douglas | 17 min |
| Jul 31, 12:57 PM MDT | Special Weather Statement | PUB | Costilla | 63 min |
| Jul 31, 1:12 PM MDT | Special Weather Statement | PUB | Custer | 33 min |
| Jul 31, 1:39 PM MDT | Flash Flood Warning | PUB | Fremont | 3 hr |
| Jul 31, 1:56 PM MDT | Special Weather Statement | PUB | Custer | 49 min |
| Jul 31, 1:59 PM MDT | Special Weather Statement | PUB | Chaffee | 46 min |
| Jul 31, 2:01 PM MDT | Special Weather Statement | PUB | Chaffee | 44 min |
| Jul 31, 2:12 PM MDT | River Flood Watch | PUB | Pueblo | 18 hr |
| Jul 31, 2:12 PM MDT | River Flood Watch | PUB | Pueblo | 15 hr |
| Jul 31, 2:12 PM MDT | River Flood Watch | PUB | Pueblo | 13 hr |
| Jul 31, 2:13 PM MDT | Special Weather Statement | PUB | Conejos | 32 min |
| Jul 31, 2:36 PM MDT | Flash Flood Warning | PUB | Chaffee | 3 hr |
| Jul 31, 2:38 PM MDT | Flash Flood Warning | PUB | Custer | 118 min |
| Jul 31, 2:48 PM MDT | Flash Flood Warning | PUB | Chaffee | 3 hr |
| Jul 31, 3:11 PM MDT | Special Weather Statement | PUB | Conejos | 34 min |
| Jul 31, 3:22 PM MDT | Special Weather Statement | PUB | Saguache | 38 min |
| Jul 31, 3:25 PM MDT | Special Weather Statement | PUB | Alamosa | 35 min |
| Jul 31, 3:30 PM MDT | Special Weather Statement | PUB | Rio Grande | 45 min |
| Jul 31, 3:39 PM MDT | Special Weather Statement | PUB | Las Animas | 36 min |
| Jul 31, 3:43 PM MDT | Special Weather Statement | PUB | Baca | 32 min |
| Jul 31, 3:56 PM MDT | Special Weather Statement | PUB | Huerfano | 49 min |
| Jul 31, 4:05 PM MDT | Special Weather Statement | PUB | El Paso | 25 min |
| Jul 31, 4:31 PM MDT | Flash Flood Warning | PUB | El Paso | 3 hr |
| Jul 31, 4:46 PM MDT | Flash Flood Warning | PUB | Huerfano | 4 hr |
| Jul 31, 4:50 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
| Jul 31, 4:59 PM MDT | Special Weather Statement | PUB | Baca | 31 min |
| Jul 31, 5:03 PM MDT | Flash Flood Warning | PUB | Custer, Huerfano, Pueblo | 3 hr |
| Jul 31, 5:13 PM MDT | Flash Flood Warning | PUB | Costilla, Huerfano | 4 hr |
| Jul 31, 5:28 PM MDT | Special Weather Statement | PUB | Baca | 32 min |
| Jul 31, 5:29 PM MDT | Special Weather Statement | PUB | Baca | 46 min |
| Jul 31, 5:35 PM MDT | Flash Flood Warning | PUB | El Paso | 3 hr |
| Jul 31, 5:45 PM MDT | Special Weather Statement | PUB | Baca | 30 min |
| Jul 31, 5:55 PM MDT | Severe Thunderstorm Warning | PUB | Baca | 35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.