Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 66, NWS Pueblo, CO

July 22, 2021Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 22, 2021, 5:41 PM MDT for Saguache 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: Jul 22, 2021, 5:41 PM MDT (23:41 UTC)
Expired: Jul 22, 2021, 8:21 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

County Saguache County, CO

The radar

The Pueblo radar (KPUX), 151 km from the middle of the area, began a volume at 23:41 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

Grand Junction, CO (KGJT), launched 12:00Z, 11.7 hours before the alert went out and 265 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1949 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

959 
WGUS55 KPUB 222341
FFWPUB
COC109-230245-
/O.NEW.KPUB.FF.W.0066.210722T2341Z-210723T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
541 PM MDT Thu Jul 22 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Southeastern Saguache County in central Colorado...

* Until 845 PM MDT.

* At 541 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain in open country extending from 8 miles northeast of 
  Moffat to 12 miles southeast of Moffat. Between 1 and 2 inches of 
  rain have fallen. The expected rainfall rate is 1 to 2 inches 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...
  Moffat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3814 10581 3807 10576 3801 10573 3796 10571
      3792 10571 3784 10570 3780 10579 3788 10585
      3796 10592 3803 10593 3807 10593 3813 10592
      3814 10584

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

KT

2 follow-up statements

481 
WGUS75 KPUB 230058
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
658 PM MDT Thu Jul 22 2021

COC109-230245-
/O.CON.KPUB.FF.W.0066.000000T0000Z-210723T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saguache CO-
658 PM MDT Thu Jul 22 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT THIS 
EVENING FOR SOUTHEASTERN SAGUACHE COUNTY...

At 658 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain in open country extending from 8 miles northeast of Moffat to 
12 miles southeast of Moffat have weakened. Between 1 and 2 inches 
of rain have fallen. Localized flash flooding is expected to 
continue until the water has a chance to recede.

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...
  Moffat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3814 10581 3807 10576 3801 10573 3796 10571
      3792 10571 3784 10570 3780 10579 3788 10585
      3796 10592 3803 10593 3807 10593 3813 10592
      3814 10584

FLASH FLOOD...RADAR INDICATED

$$

KT

542 
WGUS75 KPUB 230221
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
821 PM MDT Thu Jul 22 2021

COC109-230231-
/O.CAN.KPUB.FF.W.0066.000000T0000Z-210723T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saguache CO-
821 PM MDT Thu Jul 22 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN SAGUACHE 
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.

LAT...LON 3814 10581 3807 10576 3801 10573 3796 10571
      3792 10571 3784 10570 3780 10579 3788 10585
      3796 10592 3803 10593 3807 10593 3813 10592
      3814 10584

$$

KT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 6:19 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 21, 6:51 PM MDT	Special Weather Statement	PUB	Conejos	39 min
Jul 21, 6:59 PM MDT	Special Weather Statement	PUB	Costilla	46 min
Jul 21, 7:00 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 22, 2:42 AM MDT	Flood Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	6 min
Jul 22, 2:54 AM MDT	Flash Flood Watch	PUB	Chaffee, Conejos, Lake, Mineral, Rio Grande, Saguache	18 hr
Jul 22, 1:43 PM MDT	Special Weather Statement	PUB	Rio Grande	62 min
Jul 22, 2:59 PM MDT	Special Weather Statement	PUB	Saguache	46 min
Jul 22, 3:30 PM MDT	Special Weather Statement	PUB	Mineral	60 min
Jul 22, 3:46 PM MDT	Flash Flood Warning	PUB	Costilla	3 hr
Jul 22, 3:51 PM MDT	Special Weather Statement	PUB	Saguache	54 min
Jul 22, 3:55 PM MDT	Severe Thunderstorm Warning	PUB	Saguache	35 min
Jul 22, 4:11 PM MDT	Severe Thunderstorm Warning	PUB	Saguache	19 min
Jul 22, 4:29 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Fremont, Saguache	3 hr
Jul 22, 4:44 PM MDT	Special Weather Statement	PUB	Custer	46 min
Jul 22, 4:58 PM MDT	Special Weather Statement	PUB	Saguache	32 min
Jul 22, 5:06 PM MDT	Flash Flood Warning	PUB	Las Animas	3 hr
Jul 22, 5:21 PM MDT	Special Weather Statement	PUB	Alamosa	39 min
Jul 22, 5:59 PM MDT	Special Weather Statement	PUB	Alamosa	46 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.