Alert archive / Colorado / Flash Flood Warnings in 2021

Flash Flood Warning 111, NWS Pueblo, CO

August 1, 2021Pueblo County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 1, 2021, 2:43 AM MDT for Pueblo 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
Aug 1, 2021, 2:43 AM MDT (08:43 UTC)
Expired
Aug 1, 2021, 5:48 AM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Flood severity
None

County Pueblo County, CO

The radar

The Pueblo radar (KPUX), 38 km from the middle of the area, began a volume at 08:43 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

TimeReportWhereRemark
Aug 1, 3:49 AM MDTFLASH FLOOD2 Nne Blende, COLAW ENFORCEMENT INDICATES THAT FLASH FLOODING CONTINUES ACROSS EASTERN PARTS OF THE PUEBLO AREA, THOUGH NOT AS SIGNIFICANT AS EARLIER IN THE OVERNIGHT HOURS.

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 00:00Z, 8.7 hours before the alert went out and 211 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-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2021-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 81 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2021-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
81 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1329 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-14 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.

620 
WGUS55 KPUB 010843
FFWPUB
COC101-011500-
/O.NEW.KPUB.FF.W.0111.210801T0843Z-210801T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
243 AM MDT Sun Aug 1 2021

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  A large portion of central and northern Pueblo County in 
  southeastern Colorado...

* Until 900 AM MDT Sunday.

* At 243 AM MDT, moderate to locally heavy rain continues across the 
  warning area. Between 3 and 5 inches of rain have already fallen 
  from earlier shower and thunderstorm activity. Additional rainfall 
  amounts of 0.5 to 1.5 inches are possible in the warned area, as 
  rain continues through the morning hours. Flash flooding is 
  ongoing and is expected to continue through the morning hours.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Reports of roads washed out with upwards of 4 feet of
           standing water, flooded underpasses, and other
           significant flooding from an Off-Duty National Weather
           Service Meteorologist, trained weather spotters, and
           law enforcement.

  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...
  Pueblo, Blende, Avondale, Salt Creek and Pueblo Depot.

This includes the following streams and drainages...
  Salt Creek, Chico Creek, Blue Ribbon Creek, Boggs Creek, Dry 
  Creek, Greenhorn Creek, Wild Horse Creek, Fourmile Creek, Burnt 
  Creek, Sixmile Creek, Edson Arroyo, Fountain Creek, Williams 
  Creek, Thomkins Arroyo, Black Squirrel Creek, Wolf Arroyo, Saint 
  Charles River, Tom Hollow, Haynes Creek, Arkansas River and Andy 
  Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

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

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3818 10474 3834 10463 3846 10454 3851 10444
      3851 10428 3840 10419 3827 10428 3809 10452
      3807 10465 3811 10472 3812 10473

FLASH FLOOD...OBSERVED

$$

Cohen
1 follow-up statement
495 
WGUS75 KPUB 011148
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
548 AM MDT Sun Aug 1 2021

COC101-011158-
/O.CAN.KPUB.FF.W.0111.000000T0000Z-210801T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pueblo CO-
548 AM MDT Sun Aug 1 2021

...FLASH FLOOD WARNING IS CANCELLED FOR A LARGE PORTION OF CENTRAL 
AND NORTHERN PUEBLO COUNTY AND HAS BEEN REPLACED BY A FLOOD 
WARNING...

Flood waters are slowly receding, as the heavy rain has ended. 
However, with flooding from earlier heavy rainfall potentially 
continuing as late as the mid-morning hours, a Flood Warning is in 
effect. Please continue to heed remaining road closures.

LAT...LON 3818 10474 3834 10463 3846 10454 3851 10444
      3851 10428 3840 10419 3827 10428 3809 10452
      3807 10465 3811 10472 3812 10473

$$

Cohen

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 6:00 PM MDTFlash Flood Warning Considerable damage threatPUBCostilla, Huerfano3 hr
Jul 31, 6:02 PM MDTSpecial Weather StatementPUBHuerfano28 min
Jul 31, 6:11 PM MDTFlash Flood WarningPUBCuster, Fremont, Huerfano, Pueblo2 hr
Jul 31, 6:12 PM MDTSevere Thunderstorm WarningPUBBaca33 min
Jul 31, 6:20 PM MDTFlash Flood WarningPUBHuerfano, Las Animas3 hr
Jul 31, 6:20 PM MDTSpecial Weather StatementPUBBaca40 min
Jul 31, 6:21 PM MDTFlash Flood WarningPUBBaca3 hr
Jul 31, 6:27 PM MDTSevere Thunderstorm WarningPUBBaca, Las Animas33 min
Jul 31, 6:29 PM MDTSpecial Weather StatementPUBBaca31 min
Jul 31, 6:37 PM MDTSpecial Weather StatementPUBHuerfano38 min
Jul 31, 6:39 PM MDTSpecial Weather StatementPUBLas Animas36 min
Jul 31, 6:52 PM MDTSevere Thunderstorm WarningPUBBaca, Las Animas22 min
Jul 31, 7:01 PM MDTSpecial Weather StatementPUBBaca44 min
Jul 31, 7:05 PM MDTSpecial Weather StatementPUB40 min
Jul 31, 7:10 PM MDTSpecial Weather StatementPUB35 min
Jul 31, 7:13 PM MDTSpecial Weather StatementPUBLas Animas32 min
Jul 31, 7:20 PM MDTSpecial Weather StatementPUBHuerfano40 min
Jul 31, 7:29 PM MDTSpecial Weather StatementPUBHuerfano61 min
Jul 31, 7:54 PM MDTSpecial Weather StatementPUBBaca51 min
Jul 31, 8:28 PM MDTFlash Flood WarningPUBLas Animas3 hr
Jul 31, 8:28 PM MDTSpecial Weather StatementPUBLas Animas, Pueblo47 min
Jul 31, 8:50 PM MDTSpecial Weather StatementPUBBaca40 min
Jul 31, 10:11 PM MDTSpecial Weather StatementPUBPueblo49 min
Jul 31, 10:45 PM MDTFlash Flood WarningPUBPueblo4 hr
Jul 31, 11:24 PM MDTFlash Flood WarningPUBBent, Otero4 hr
Jul 31, 11:41 PM MDTFlash Flood WarningPUBPueblo4 hr
Aug 1, 3:04 AM MDTFlash Flood WatchPUBConejos, Mineral, Rio Grande, Saguache18 hr
Aug 1, 3:29 AM MDTRiver Flood WatchPUBPueblo94 min
Aug 1, 3:30 AM MDTRiver Flood WatchPUBPueblo4 hr
Aug 1, 5:00 AM MDTRiver Flood WarningPUBPueblo26 hr
Aug 1, 5:44 AM MDTAreal Flood WarningPUBPueblo3 hr
Aug 1, 7:20 AM MDTRiver Flood WatchPUBOtero14 hr
Aug 1, 2:47 PM MDTFlash Flood WatchPUBAlamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 7 more32 hr

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.