Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 116, NWS Pueblo, CO

August 3, 2021Costilla County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 3, 2021, 4:46 PM MDT for Costilla 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 3, 2021, 4:46 PM MDT (22:46 UTC)
Expired: Aug 3, 2021, 7:45 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

County Costilla County, CO

The radar

The Pueblo radar (KPUX), 148 km from the middle of the area, began a volume at 22:48 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 12:00Z, 10.8 hours before the alert went out and 292 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: 153 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1388 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

214 
WGUS55 KPUB 032246
FFWPUB
COC023-040145-
/O.NEW.KPUB.FF.W.0116.210803T2246Z-210804T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
446 PM MDT Tue Aug 3 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Northeastern Costilla County in south central Colorado...

* Until 745 PM MDT.

* At 446 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain in West Indian Creek and Sangre De Cristo Creek 
  southwest of the Spring Burn Scar. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 0.5 to 1.5 inches in 1 
  hour. Additional rainfall amounts up to 1 inch are possible in the 
  warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Spring Burn Scar south of Highway 160 in Costilla county.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3743 10521 3740 10521 3737 10526 3739 10532
      3742 10538 3744 10539 3751 10538 3753 10534
      3751 10531 3749 10530 3748 10529 3748 10526
      3747 10525 3747 10524 3746 10525 3745 10525
      3744 10524

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1.5 INCHES IN 1 HOUR

$$

KT

3 follow-up statements

435 
WGUS75 KPUB 032337
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
537 PM MDT Tue Aug 3 2021

COC023-040145-
/O.CON.KPUB.FF.W.0116.000000T0000Z-210804T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-
537 PM MDT Tue Aug 3 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT THIS 
EVENING FOR NORTHEASTERN COSTILLA COUNTY...

At 537 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain in West Indian Creek and Sangre De Cristo Creek southwest of 
Spring Burn Scar. The expected rainfall rate is up to 1 inch in 1 
hour. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Open country just southwest of Spring Burn Scar

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3743 10521 3740 10521 3737 10526 3739 10532
      3742 10538 3744 10539 3751 10538 3753 10534
      3751 10531 3749 10530 3748 10529 3748 10526
      3747 10525 3747 10524 3746 10525 3745 10525
      3744 10524

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 1 HOUR

$$

KT

740 
WGUS75 KPUB 040020
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
620 PM MDT Tue Aug 3 2021

COC023-040145-
/O.CON.KPUB.FF.W.0116.000000T0000Z-210804T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-
620 PM MDT Tue Aug 3 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT THIS 
EVENING FOR NORTHEASTERN COSTILLA COUNTY...

At 620 PM MDT, Doppler radar indicated rain has decreased across the 
West Indian Creek and Sangre De Cristo Creek southwest of Spring 
Burn Scar. Between 1 and 2 inches of rain have fallen. Flash 
flooding will continue in this area until the water has a chance to 
recede.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, county
         roads, highways, streets and underpasses as well as
         other poor drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Open country just southwest of the Spring Burn Scar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3743 10521 3740 10521 3737 10526 3739 10532
      3742 10538 3744 10539 3751 10538 3753 10534
      3751 10531 3749 10530 3748 10529 3748 10526
      3747 10525 3747 10524 3746 10525 3745 10525
      3744 10524

FLASH FLOOD...RADAR INDICATED

$$

KT

074 
WGUS75 KPUB 040146
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
746 PM MDT Tue Aug 3 2021

COC023-040156-
/O.EXP.KPUB.FF.W.0116.000000T0000Z-210804T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Costilla CO-
746 PM MDT Tue Aug 3 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN COSTILLA 
COUNTY...

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 1200 AM MDT for portions 
of central Colorado and southeast Colorado.

LAT...LON 3743 10521 3740 10521 3737 10526 3739 10532
      3742 10538 3744 10539 3751 10538 3753 10534
      3751 10531 3749 10530 3748 10529 3748 10526
      3747 10525 3747 10524 3746 10525 3745 10525
      3744 10524

$$

KS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 6:47 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Huerfano	2 hr
Aug 2, 7:38 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Huerfano	96 min
Aug 2, 9:04 PM MDT	Special Weather Statement	PUB	Chaffee	56 min
Aug 3, 12:46 PM MDT	Special Weather Statement	PUB	El Paso	29 min
Aug 3, 12:56 PM MDT	Special Weather Statement	PUB	Huerfano	34 min
Aug 3, 1:20 PM MDT	Special Weather Statement	PUB	El Paso	40 min
Aug 3, 1:48 PM MDT	Special Weather Statement	PUB	Custer	27 min
Aug 3, 1:58 PM MDT	Special Weather Statement	PUB	Huerfano	32 min
Aug 3, 2:07 PM MDT	Special Weather Statement	PUB	El Paso	38 min
Aug 3, 2:12 PM MDT	Special Weather Statement	PUB	Custer	33 min
Aug 3, 2:28 PM MDT	Special Weather Statement	PUB	Huerfano	32 min
Aug 3, 2:30 PM MDT	Special Weather Statement	PUB	Las Animas	45 min
Aug 3, 2:48 PM MDT	Special Weather Statement	PUB	Pueblo	27 min
Aug 3, 2:52 PM MDT	Special Weather Statement	PUB	El Paso	38 min
Aug 3, 3:32 PM MDT	Special Weather Statement	PUB	Chaffee	43 min
Aug 3, 3:38 PM MDT	Special Weather Statement	PUB	Pueblo	37 min
Aug 3, 4:14 PM MDT	Special Weather Statement	PUB	Alamosa	31 min
Aug 3, 4:18 PM MDT	Special Weather Statement	PUB	Costilla	42 min
Aug 3, 4:25 PM MDT	Special Weather Statement	PUB	Fremont	65 min
Aug 3, 4:28 PM MDT	Special Weather Statement	PUB	Las Animas	32 min
Aug 3, 4:51 PM MDT	Special Weather Statement	PUB	Teller	39 min
Aug 3, 4:57 PM MDT	Special Weather Statement	PUB	Pueblo	33 min
Aug 3, 5:08 PM MDT	Special Weather Statement	PUB	Fremont	52 min
Aug 3, 5:13 PM MDT	Flash Flood Warning	PUB	Pueblo	3 hr
Aug 3, 5:26 PM MDT	Flash Flood Warning	PUB	Teller	109 min
Aug 3, 5:31 PM MDT	Special Weather Statement	PUB	Fremont	44 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.