Alert archive / Colorado / Flash Flood Warnings in 2017

Flash Flood Warning 25, NWS Pueblo, CO

July 16, 2017Custer County, Fremont County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 16, 2017, 2:41 PM MDT for Custer County, Fremont County, Colorado. It was in force for 4 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 16, 2017, 2:41 PM MDT (20:41 UTC)
Expired
Jul 16, 2017, 6:21 PM MDT
In force
4 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), 140 km from the middle of the area, began a volume at 20:43 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.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 8.7 hours before the alert went out and 253 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 12:00Z on 2017-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 2017-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2761 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

494 
WGUS55 KPUB 162041
FFWPUB
COC027-043-162245-
/O.NEW.KPUB.FF.W.0025.170716T2041Z-170716T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
241 PM MDT SUN JUL 16 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 445 PM MDT

* At 238 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...
  The Hayden Pass Burn Scar, Hayden Creek Campground, Coaldale.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

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.

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.

&&

LAT...LON 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW
5 follow-up statements
560 
WGUS75 KPUB 162109
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
309 PM MDT SUN JUL 16 2017

COC027-043-162245-
/O.CON.KPUB.FF.W.0025.000000T0000Z-170716T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
309 PM MDT SUN JUL 16 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR
SOUTHWESTERN FREMONT AND NORTHWESTERN CUSTER COUNTIES...
...THIS INCLUDES THE HAYDEN PASS BURN SCAR...

 At 304 PM MDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area.  Doppler radar estimates up to 1 
inch of rain has already fallen across the headwaters of Hayden 
Creek and Wolf Creek, over the northwest portion of the scar. Flash 
flooding is expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hayden Creek, Wolf Creek, Big Cottonwood Creek, 
Little Cottonwood Creek and Butter Creek Drainages. The debris flow 
can consist of rock, mud, vegetation and other loose materials.

Some locations that will experience flooding include...
Hayden Creek Campground, County Road 6, County Road 40 and 
possibly Coaldale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

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.

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.

&&

LAT...LON 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW
470 
WGUS75 KPUB 162200
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
400 PM MDT SUN JUL 16 2017

COC027-043-162245-
/O.CON.KPUB.FF.W.0025.000000T0000Z-170716T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
400 PM MDT SUN JUL 16 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR
SOUTHWESTERN FREMONT AND NORTHWESTERN CUSTER COUNTIES...

At 351 PM MDT, Doppler radar indicated thunderstorms producing 
moderate to heavy rain across the warned area.  Doppler radar 
estimates up to 1.4 inches of rain has already fallen across the 
headwaters of Hayden Creek and Wolf Creek, over the northwest 
portion of the scar.  Flash flooding is likely occurring at this 
time.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hayden Creek, Wolf Creek, Big Cottonwood Creek, 
Little Cottonwood Creek and Butter Creek Drainages. The debris flow 
can consist of rock, mud, vegetation and other loose materials.

Some locations that will experience flooding include...
Hayden Creek Campground, County Road 6, County Road 40 and possibly 
Coaldale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

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.

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.

&&

LAT...LON 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW
314 
WGUS55 KPUB 162230
FFWPUB
COC027-043-170045-
/O.EXT.KPUB.FF.W.0025.000000T0000Z-170717T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
430 PM MDT SUN JUL 16 2017

The National Weather Service in Pueblo has extended the

* Flash Flood Warning for...
  Southwestern Fremont County in central Colorado...
  Northwestern Custer County in southeastern Colorado...
  Including the Hayden Pass Burn Scar...

* Until 645 PM MDT

* At 421 PM MDT, Doppler radar indicated thunderstorms producing 
  light rain showers across the warned area. The heavy rain has 
  ended but ongoing runoff from earlier heavy rains will continue 
  the threat of Flash flooding for a while longer.

* Some locations that will experience flooding include...
  Hayden Creek Campground, County Road 6, County Road 40 and 
  possibly Coaldale.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Hayden Creek, Wolf Creek, Big Cottonwood Creek, 
Little Cottonwood Creek and Butter Creek Drainages.  The debris flow 
can consist of rock, mud, vegetation and other loose materials.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

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.

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.

&&

LAT...LON 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW
436 
WGUS75 KPUB 162334
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
534 PM MDT SUN JUL 16 2017

COC027-043-170045-
/O.CON.KPUB.FF.W.0025.000000T0000Z-170717T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
534 PM MDT SUN JUL 16 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM MDT FOR
SOUTHWESTERN FREMONT AND NORTHWESTERN CUSTER COUNTIES...

At 530 PM MDT, Doppler radar indicated light showers across the 
warned area. The heavy rain has ended but ongoing runoff from 
earlier heavy rains will continue the threat of Flash flooding for a 
while longer.

Excessive rainfall over the burn scar from earlier will result in 
debris flow moving through the Hayden Creek, Wolf Creek, Big 
Cottonwood Creek, Little Cottonwood Creek and Butter Creek 
Drainages. The debris flow can consist of rock, mud, vegetation and 
other loose materials.

Some locations that will experience flooding include...
Hayden Creek Campground, County Road 6, County Road 40 and 
possibly Coaldale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

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 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW
330 
WGUS75 KPUB 170021
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
621 PM MDT SUN JUL 16 2017

COC027-043-170023-
/O.CAN.KPUB.FF.W.0025.000000T0000Z-170717T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont CO-Custer CO-
621 PM MDT SUN JUL 16 2017

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN FREMONT AND NORTHWESTERN
CUSTER COUNTIES IS CANCELLED...
...THIS INCLUDES THE HAYDEN PASS BURN SCAR AREA...

Heavy rain has ended and flood waters are going down.  Flooding is 
no longer expected to pose a serious threat.  Please continue to 
heed any remaining road closures and avoid driving through areas 
where water covers the road.

LAT...LON 3832 10586 3841 10585 3839 10577 3835 10571
      3829 10567 3824 10568 3824 10574 3828 10582

$$

LW

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, 8:04 PM MDTFlash Flood WarningPUBCuster, Fremont3 hr
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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.