Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 91, NWS Pueblo, CO

July 30, 2021Saguache County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 30, 2021, 5:16 PM MDT for Saguache County, Colorado. It was in force for 2 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 30, 2021, 5:16 PM MDT (23:16 UTC)
Expired: Jul 30, 2021, 7:23 PM MDT
In force: 2 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

County Saguache County, CO

The radar

The Pueblo radar (KPUX), 162 km from the middle of the area, began a volume at 23:16 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, 11.3 hours before the alert went out and 235 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: 28 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 1537 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

845 
WGUS55 KPUB 302316
FFWPUB
COC109-310215-
/O.NEW.KPUB.FF.W.0091.210730T2316Z-210731T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
516 PM MDT Fri Jul 30 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  North Central Saguache County in central Colorado...

* Until 815 PM MDT.

* At 516 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches 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...
  Villa Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

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 3832 10606 3831 10601 3827 10593 3820 10593
      3816 10603 3822 10609 3830 10610

FLASH FLOOD...RADAR INDICATED

$$

KAM

2 follow-up statements

257 
WGUS75 KPUB 310008
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
608 PM MDT Fri Jul 30 2021

COC109-310215-
/O.CON.KPUB.FF.W.0091.000000T0000Z-210731T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saguache CO-
608 PM MDT Fri Jul 30 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MDT THIS 
EVENING FOR NORTH CENTRAL SAGUACHE COUNTY...

At 608 PM MDT, Doppler radar indicated thunderstorms have 
dissipated, with light rain continuing across the warned area. 
Between 1 and 2 inches of rain have fallen. Flash flooding is likely 
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...
  Villa Grove.

Light rain will continue through 7 PM across the warned area.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

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 3832 10606 3831 10601 3827 10593 3820 10593
      3816 10603 3822 10609 3830 10610

FLASH FLOOD...RADAR INDICATED

$$

KAM

196 
WGUS75 KPUB 310123
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
723 PM MDT Fri Jul 30 2021

COC109-310133-
/O.CAN.KPUB.FF.W.0091.000000T0000Z-210731T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saguache CO-
723 PM MDT Fri Jul 30 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL SAGUACHE 
COUNTY...

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 a portion 
of central Colorado.

LAT...LON 3832 10606 3831 10601 3827 10593 3820 10593
      3816 10603 3822 10609 3830 10610

$$

KAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 3:18 AM MDT	Flash Flood Watch	PUB	Chaffee, Lake, Saguache	20 hr
Jul 30, 1:48 PM MDT	Flash Flood Watch	PUB	Alamosa, Baca, Bent, Chaffee, Conejos, Costilla and 13 more	40 hr
Jul 30, 2:22 PM MDT	Special Weather Statement	PUB	Teller	38 min
Jul 30, 3:00 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Chaffee, Fremont, Saguache	3 hr
Jul 30, 3:44 PM MDT	Special Weather Statement	PUB	Alamosa	31 min
Jul 30, 4:07 PM MDT	Special Weather Statement	PUB	Custer	23 min
Jul 30, 4:13 PM MDT	Special Weather Statement	PUB	Alamosa	32 min
Jul 30, 4:14 PM MDT	Special Weather Statement	PUB	Saguache	31 min
Jul 30, 4:54 PM MDT	Special Weather Statement	PUB	Conejos	36 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.