Alert archive / Colorado / Flash Flood Warnings in 2018

Flash Flood Warning 9, NWS Pueblo, CO

July 21, 2018Custer County, Fremont County, Pueblo County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 21, 2018, 4:16 PM MDT for Custer County, Fremont County, Pueblo 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 21, 2018, 4:16 PM MDT (22:16 UTC)
Expired
Jul 21, 2018, 6:30 PM MDT
In force
2 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Flood severity
None

Counties Custer County, CO, Fremont County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 84 km from the middle of the area, began a volume at 22:17 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 (KDEN), launched 12:00Z, 10.3 hours before the alert went out and 244 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 12:00Z on 2018-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2018-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2923 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

655 
WGUS55 KPUB 212216
FFWPUB
COC027-043-101-220115-
/O.NEW.KPUB.FF.W.0009.180721T2216Z-180722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
416 PM MDT SAT JUL 21 2018

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Southeastern Fremont County in central Colorado...
  Northeastern Custer County in southeastern Colorado...
  Western Pueblo County in southeastern Colorado...

* Until 715 PM MDT.

* At 415 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Wetmore and the Junkins Burn Scar.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hardscrabble drainage. The debris flow can 
consist of rock, mud, vegetation and other loose materials. This 
Flash Flood Warning is for the Junkins Burn Scar.

LAT...LON 3814 10514 3816 10514 3818 10512 3825 10512
      3835 10508 3835 10504 3825 10504 3819 10505
      3814 10504

$$

KTS
3 follow-up statements
666 
WGUS75 KPUB 212252
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
452 PM MDT SAT JUL 21 2018

COC027-043-101-220115-
/O.CON.KPUB.FF.W.0009.000000T0000Z-180722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-Pueblo CO-
452 PM MDT SAT JUL 21 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
SOUTHEASTERN FREMONT...NORTHEASTERN CUSTER AND WESTERN PUEBLO
COUNTIES...

At 450 PM MDT, Doppler radar indicated light to moderate rain across 
the Junkins burn scar. Radar estimates of half to three quarters of 
an inch of rain have fallen. Flash flooding may be occurring on the 
Junkins burn scar.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hardscrabble Creek drainage. The debris flow can 
consist of rock, mud, vegetation and other loose materials.

Some locations that will experience flooding include...
Wetmore and the Junkins Burn Scar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
will likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.

&&

LAT...LON 3814 10514 3816 10514 3818 10512 3825 10512
      3835 10508 3835 10504 3825 10504 3819 10505
      3814 10504

$$

kam
364 
WGUS75 KPUB 212327
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
527 PM MDT SAT JUL 21 2018

COC027-043-101-220115-
/O.CON.KPUB.FF.W.0009.000000T0000Z-180722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-Pueblo CO-
527 PM MDT SAT JUL 21 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
SOUTHEASTERN FREMONT...NORTHEASTERN CUSTER AND WESTERN PUEBLO
COUNTIES...

At 526 PM MDT, Doppler radar indicated moderate rain across the 
Junkins burn scar.  Flash flooding may already be occurring.  Radar 
estimates of up to an inch of rainfall has occurred.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hardscrabble Creek drainage. The debris flow can 
consist of rock, mud, vegetation and other loose materials.

Some locations that will experience flooding include...
Wetmore and the Junkins burn scar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
will likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.

&&

LAT...LON 3814 10514 3816 10514 3818 10512 3825 10512
      3835 10508 3835 10504 3825 10504 3819 10505
      3814 10504

$$

kam
612 
WGUS75 KPUB 220030
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
630 PM MDT SAT JUL 21 2018

COC027-043-101-220040-
/O.CAN.KPUB.FF.W.0009.000000T0000Z-180722T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-Pueblo CO-
630 PM MDT SAT JUL 21 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN FREMONT...NORTHEASTERN
CUSTER AND WESTERN PUEBLO COUNTIES IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3814 10514 3816 10514 3818 10512 3825 10512
      3835 10508 3835 10504 3825 10504 3819 10505
      3814 10504

$$

kam

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 6:30 PM MDTSpecial Weather StatementPUBKiowa45 min
Jul 20, 6:51 PM MDTSevere Thunderstorm WarningPUBKiowa, Prowers39 min
Jul 20, 7:24 PM MDTSpecial Weather StatementPUBKiowa36 min
Jul 21, 2:35 PM MDTSpecial Weather StatementPUBFremont40 min
Jul 21, 2:47 PM MDTSpecial Weather StatementPUBSaguache43 min
Jul 21, 3:04 PM MDTSevere Thunderstorm WarningPUBSaguache26 min
Jul 21, 3:16 PM MDTSpecial Weather StatementPUBFremont29 min
Jul 21, 3:18 PM MDTSpecial Weather StatementPUBTeller42 min
Jul 21, 3:21 PM MDTSevere Thunderstorm WarningPUBLas Animas24 min
Jul 21, 3:48 PM MDTSpecial Weather StatementPUBEl Paso42 min
Jul 21, 3:51 PM MDTSpecial Weather StatementPUBTeller39 min
Jul 21, 4:23 PM MDTSpecial Weather StatementPUBEl Paso52 min
Jul 21, 4:30 PM MDTSpecial Weather StatementPUBEl Paso45 min
Jul 21, 4:44 PM MDTSpecial Weather StatementPUBChaffee46 min
Jul 21, 4:59 PM MDTSevere Thunderstorm WarningPUBEl Paso, Pueblo31 min
Jul 21, 5:02 PM MDTAreal Flood AdvisoryPUBEl Paso, Fremont, Teller102 min
Jul 21, 5:05 PM MDTSpecial Weather StatementPUBPueblo40 min
Jul 21, 5:08 PM MDTSpecial Weather StatementPUBEl Paso37 min
Jul 21, 5:28 PM MDTSpecial Weather StatementPUBCrowley47 min

Nearby

Flash Flood Warnings in Colorado, 2018Every flash flood warning in 2018

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.