Alert archive / Colorado / Flash Flood Warnings in 2017

Flash Flood Warning 22, NWS Pueblo, CO

July 15, 2017Custer County, Fremont County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 15, 2017, 8:04 PM MDT for Custer County, Fremont 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
Jul 15, 2017, 8:04 PM MDT (02:04 UTC)
Expired
Jul 15, 2017, 11:00 PM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Flood severity
None

Counties Custer County, CO, Fremont County, CO

The radar

The Pueblo radar (KPUX), 138 km from the middle of the area, began a volume at 02:03 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
Jul 15, 10:00 PM MDTFLASH FLOOD4 Sw Coaldale, COFLOOD WATERS OFF HAYDEN PASS BURN SCAR FLOODED CAMPGROUND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 00:00Z, 2.1 hours before the alert went out and 255 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, Grand Junction, CO at 00:00Z on 2017-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 121 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, Grand Junction, CO at 00:00Z on 2017-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
121 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
3542 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

760 
WGUS55 KPUB 160204
FFWPUB
COC027-043-160500-
/O.NEW.KPUB.FF.W.0022.170716T0204Z-170716T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
804 PM MDT SAT JUL 15 2017

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Southwestern Fremont County in central Colorado...
  Northwestern Custer County in southeastern Colorado...

* Until 1100 PM MDT

* At 801 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...
  Coaldale.

Excessive rainfall over the burn scar will result in debris flow 
moving through the South Prong, Wolf Creek, Hayden Creek and Middle 
Creek drainages. The debris flow can consist of rock, mud, 
vegetation and other loose materials.  If development continues 
farther east, then Cottonwood Creek, Little Cottonwood Creek and 
Butter Creek may also experience flooding. 

This includes the following streams and drainages...South 
Prong Creek...Wolf Creek...and Hayden Pass Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3834 10569 3826 10568 3825 10573 3827 10580
      3828 10583 3832 10587 3837 10575

$$

KT
2 follow-up statements
198 
WGUS75 KPUB 160237
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
837 PM MDT SAT JUL 15 2017

COC027-043-160500-
/O.CON.KPUB.FF.W.0022.000000T0000Z-170716T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
837 PM MDT SAT JUL 15 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
SOUTHWESTERN FREMONT AND NORTHWESTERN CUSTER COUNTIES...

At 831 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to one inch of rain has already 
fallen across South Prong, Middle Prong and the Hayden Creek 
drainages.  Additional heavy rain is falling on the upper reaches of 
Wolf Creek. Additional thunderstorm development is occuring on the 
eastern side of the burn scar. Movement of these storms was to the 
southeast at 10 mph.  Flash flooding is expected to continue.

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

Some locations that will experience flooding include...
Hayden Pass Burn scar and Coaldale.

This includes the following streams and drainages...Little Cottonwood
Creek...Texas Creek...South Lake Creek...Arkansas River...Middle
Prong Hayden Creek...Big Cottonwood Creek...Hayden Pass Creek...Short
Creek...Sullivan Creek and Oak Creek.

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 3834 10569 3826 10568 3825 10573 3827 10580
      3828 10583 3832 10587 3837 10575

$$

KT
947 
WGUS75 KPUB 160308
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
908 PM MDT SAT JUL 15 2017

COC027-043-160500-
/O.CON.KPUB.FF.W.0022.000000T0000Z-170716T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
908 PM MDT SAT JUL 15 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
SOUTHWESTERN FREMONT AND NORTHWESTERN CUSTER COUNTIES...

At 903 PM MDT, Doppler radar indicated that the thunderstorms which 
produced heavy rain across the Hayden Pass burn scar have moved 
south of the region. Up to one inch of rain fell on the Northwest 
side of the burn scar in the South Prong, Middle Prong, Wolf Creek 
and Hayden Creek drainages. Another area of heavy rain fell on the 
southeast side of the burn scar in the Oak Creek drainage.  Flash 
flooding is expected to continue until the water has a chance to 
recede.

Excessive rainfall over the burn scar will result in debris flow 
moving through the South Prong, Middle Prong, Wolf Creek and Hayden 
Creek drainages as well as the Oak Creek drainage. The debris flow 
can consist of rock, mud, vegetation and other loose materials.

Some locations that will experience flooding include...
Coaldale.

This includes the following streams and drainages...South 
Prong...Middle Prong...Wolf Creek...Oak Creek and Hayden Creek.

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 3834 10569 3826 10568 3825 10573 3827 10580
      3828 10583 3832 10587 3837 10575

$$

KT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 6:08 PM MDTAreal Flood AdvisoryPUBBent, Crowley, Kiowa, Otero, Prowers3 hr
Jul 15, 6:08 PM MDTSpecial Weather StatementPUBChaffee37 min
Jul 15, 6:35 PM MDTSpecial Weather StatementPUBProwers40 min
Jul 15, 6:39 PM MDTAreal Flood AdvisoryPUBChaffee111 min
Jul 15, 6:39 PM MDTSevere Thunderstorm WarningPUBBaca, Prowers18 min
Jul 15, 6:43 PM MDTSevere Thunderstorm WarningPUBChaffee, Fremont32 min
Jul 15, 7:00 PM MDTSpecial Weather StatementPUBProwers30 min
Jul 15, 7:15 PM MDTSpecial Weather StatementPUBChaffee45 min
Jul 15, 7:19 PM MDTAreal Flood AdvisoryPUBChaffee116 min
Jul 15, 7:38 PM MDTAreal Flood AdvisoryPUBMineral, Rio Grande112 min
Jul 15, 7:53 PM MDTFlash Flood WarningPUBChaffee112 min
Jul 15, 8:17 PM MDTSpecial Weather StatementPUBSaguache28 min
Jul 15, 10:48 PM MDTFlash Flood WarningPUBCuster, Fremont3 hr
Jul 16, 12:34 PM MDTFlash Flood WarningPUBChaffee116 min
Jul 16, 1:18 PM MDTAreal Flood AdvisoryPUBChaffee117 min
Jul 16, 2:27 PM MDTAreal Flood AdvisoryPUBChaffee3 hr
Jul 16, 2:41 PM MDTFlash Flood WarningPUBCuster, Fremont4 hr
Jul 16, 3:03 PM MDTSevere Thunderstorm WarningPUBFremont21 min
Jul 16, 3:17 PM MDTAreal Flood AdvisoryPUBChaffee3 hr
Jul 16, 3:18 PM MDTSpecial Weather StatementPUB42 min
Jul 16, 3:28 PM MDTSpecial Weather StatementPUBSaguache32 min
Jul 16, 3:39 PM MDTSevere Thunderstorm WarningPUBLas Animas66 min
Jul 16, 3:47 PM MDTSevere Thunderstorm WarningPUBCuster, Saguache43 min
Jul 16, 3:59 PM MDTSevere Thunderstorm WarningPUBMineral, Rio Grande, Saguache31 min
Jul 16, 4:12 PM MDTSevere Thunderstorm WarningPUBBaca, Las Animas33 min
Jul 16, 4:35 PM MDTSpecial Weather StatementPUBRio Grande40 min
Jul 16, 4:45 PM MDTSevere Thunderstorm WarningPUBBaca, Las Animas30 min
Jul 16, 5:45 PM MDTSpecial Weather StatementPUBAlamosa45 min
Jul 16, 5:51 PM MDTSpecial Weather StatementPUBCuster39 min
Jul 16, 5:57 PM MDTFlash Flood WarningPUBCuster, Pueblo3 hr

Nearby

Flash Flood Warnings in Colorado, 2017Every flash flood warning in 2017

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.