Alert archive / Colorado / Flash Flood Watches in 2021

Flash Flood Watch 21, NWS Pueblo, CO

August 15, 20219 counties in Colorado

NWS Pueblo, CO issued this flash flood watch at Aug 15, 2021, 1:05 PM MDT for 9 counties in Colorado. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Aug 15, 2021, 1:05 PM MDT (19:05 UTC)
Expired: Aug 15, 2021, 8:09 PM MDT
In force: 7 hr
Issued by: NWS Pueblo, CO
Flood severity: None

Counties Alamosa County, CO, Chaffee County, CO, Costilla County, CO, Custer County, CO, Fremont County, CO, Huerfano County, CO, Las Animas County, CO, Pueblo County, CO, Saguache County, CO

The radar

The Pueblo radar (KPUX), 116 km from the middle of the area, began a volume at 19:06 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

Denver, CO (KDNR), launched 12:00Z, 7.1 hours before the alert went out and 282 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: 37 J/kg
Mixed-layer CIN: -475 J/kg
Mixed-layer LCL: 2654 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

451 
WGUS65 KPUB 151905
FFAPUB

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Pueblo CO
105 PM MDT Sun Aug 15 2021

COZ072>075-079-080-087-160315-
/O.NEW.KPUB.FF.A.0021.210815T1905Z-210816T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-Southern Sangre
de Cristo Mountains Between 7500 and 11000 Feet-Southern Sangre de
Cristo Mountains Above 11000 Feet-Wet Mountains between 6300 and
10000 Feet-Wet Mountains Above 10000 Feet-Walsenburg Vicinity/Upper
Huerfano River Basin Below 7500 Feet-
Including the cities of Weston, Blanca Peak, Cuchara, Rye, 
Stonewall, La Veta Pass, Poncha Pass, Walsenburg, and Spanish Peaks
105 PM MDT Sun Aug 15 2021

...FLASH FLOOD WATCH IN EFFECT UNTIL 1 AM MDT MONDAY...

The National Weather Service in Pueblo has issued a

* Flash Flood Watch for a portion of southeast Colorado, including 
  the Southern Mountains and adjacent plains. The main flash flood 
  concerns are for the Burn Scars in the Sangre De Cristo mountains 
  and Wet mountains.

* Until 1 AM MDT Monday.

* Upslope flow along with a disturbance will bring the threat of 
  lically heavy rain to the southern mountains.

* Flash flooding will be possible, especially over the Burn Scars. 
  The greatest threat will be over the Spring Burn scar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

Hodanish

2 follow-up statements

913 
WGUS65 KPUB 151937
FFAPUB

Flood Watch
National Weather Service Pueblo CO
137 PM MDT Sun Aug 15 2021

COZ072>075-079-080-087-160345-
/O.CON.KPUB.FF.A.0021.000000T0000Z-210816T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-Southern Sangre
de Cristo Mountains Between 7500 and 11000 Feet-Southern Sangre de
Cristo Mountains Above 11000 Feet-Wet Mountains between 6300 and
10000 Feet-Wet Mountains Above 10000 Feet-Walsenburg Vicinity/Upper
Huerfano River Basin Below 7500 Feet-
Including the cities of Weston, Blanca Peak, Cuchara, Rye, 
Stonewall, La Veta Pass, Poncha Pass, Walsenburg, and Spanish Peaks
137 PM MDT Sun Aug 15 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 AM MDT MONDAY...

The Flash Flood Watch continues for

* Flash Flood Watch for a portion of southeast Colorado, including 
  the Southern Mountains and adjacent plains. The main flash flood 
  concerns are for the Burn Scars in the Sangre De Cristo mountains 
  and Wet mountains. This includes the Decker burn scar, the Hayden 
  Pass burn scar, the Junkins burn scar and the Spring burn scar.

* Until 1 AM MDT Monday.

* Upslope flow along with a disturbance will bring the threat of 
  locally heavy rain to the southern mountains.

* Flash flooding will be possible, especially over the Burn Scars. 
  The greatest threat will be over the Spring Burn scar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

Hodanish

994 
WGUS65 KPUB 160209
FFAPUB

Flood Watch
National Weather Service Pueblo CO
809 PM MDT Sun Aug 15 2021

COZ072>075-079-080-087-160315-
/O.CAN.KPUB.FF.A.0021.000000T0000Z-210816T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-Southern Sangre
de Cristo Mountains Between 7500 and 11000 Feet-Southern Sangre de
Cristo Mountains Above 11000 Feet-Wet Mountains between 6300 and
10000 Feet-Wet Mountains Above 10000 Feet-Walsenburg Vicinity/Upper
Huerfano River Basin Below 7500 Feet-
Including the cities of Weston, Blanca Peak, Cuchara, Rye, 
Stonewall, La Veta Pass, Poncha Pass, Walsenburg, and Spanish Peaks
809 PM MDT Sun Aug 15 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of southeast Colorado, including 
the following areas, Northern Sangre de Cristo Mountains Above 11000 
Feet, Northern Sangre de Cristo Mountains Between 8500 And 11000 
Feet, Southern Sangre de Cristo Mountains Above 11000 Feet, Southern 
Sangre de Cristo Mountains Between 7500 and 11000 Feet, Walsenburg 
Vicinity/Upper Huerfano River Basin Below 7500 Feet, Wet Mountains 
Above 10000 Feet and Wet Mountains between 6300 and 10000 Feet has 
been cancelled.

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

$$

Hodanish

The 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, 2:01 AM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 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 Watches in Colorado, 2021 Every flash flood watch 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.