Alert archive / Colorado / Flash Flood Warnings in 2017

Flash Flood Warning 47, NWS Pueblo, CO

August 11, 2017Custer County, Pueblo County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 11, 2017, 4:36 PM MDT for Custer County, Pueblo County, Colorado. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 11, 2017, 4:36 PM MDT (22:36 UTC)
Expired: Aug 11, 2017, 6:30 PM MDT
In force: 114 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

Counties Custer County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 89 km from the middle of the area, began a volume at 22:39 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, 10.6 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-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: 55 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 966 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

949 
WGUS55 KPUB 112236
FFWPUB
COC027-101-120030-
/O.NEW.KPUB.FF.W.0047.170811T2236Z-170812T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
436 PM MDT FRI AUG 11 2017

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Eastern Custer County in southeastern Colorado...
  West central Pueblo County in southeastern Colorado...

* Until 630 PM MDT

* At 435 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...
  Junkins Burn scar and Beulah.

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

This includes the following streams and drainages...North 
Hardscrabble Creek, South Hardscrabble Creek and North 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 3810 10519 3816 10519 3820 10508 3809 10497
      3807 10498

$$

KT

2 follow-up statements

998 
WGUS75 KPUB 112254
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
454 PM MDT FRI AUG 11 2017

COC027-101-120030-
/O.CON.KPUB.FF.W.0047.000000T0000Z-170812T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Pueblo CO-
454 PM MDT FRI AUG 11 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR
EASTERN CUSTER AND WEST CENTRAL PUEBLO COUNTIES...

At 451 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain were exiting the southeast side of the Junkins Burn scar. 
Pueblo doppler radar estimated up to one half of an inch of rain has 
fallen. Flash flooding is expected to begin shortly.

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

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

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 3810 10519 3816 10519 3820 10508 3809 10497
      3807 10498

$$

KT

376 
WGUS75 KPUB 112347
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
547 PM MDT FRI AUG 11 2017

COC027-101-112357-
/O.CAN.KPUB.FF.W.0047.000000T0000Z-170812T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Pueblo CO-
547 PM MDT FRI AUG 11 2017

...THE FLASH FLOOD WARNING FOR EASTERN CUSTER AND WEST CENTRAL 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 3810 10519 3816 10519 3820 10508 3809 10497
      3807 10498

$$

KT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 6:11 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Kiowa, Prowers	49 min
Aug 10, 6:14 PM MDT	Severe Thunderstorm Warning	PUB	Crowley, Otero	46 min
Aug 10, 6:32 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas	43 min
Aug 10, 6:39 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Prowers	51 min
Aug 10, 6:41 PM MDT	Severe Thunderstorm Warning	PUB	Otero	34 min
Aug 10, 6:55 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Kiowa, Prowers	36 min
Aug 10, 6:57 PM MDT	Severe Thunderstorm Warning	PUB	Bent, Otero	33 min
Aug 10, 7:09 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas, Otero	36 min
Aug 10, 7:25 PM MDT	Special Weather Statement	PUB	Las Animas	50 min
Aug 10, 7:28 PM MDT	Severe Thunderstorm Warning	PUB	Baca, Bent, Las Animas, Otero	47 min
Aug 10, 7:30 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas	45 min
Aug 10, 7:53 PM MDT	Special Weather Statement	PUB	Pueblo	37 min
Aug 10, 8:02 PM MDT	Severe Thunderstorm Warning	PUB	Baca, Prowers	43 min
Aug 10, 8:33 PM MDT	Areal Flood Advisory	PUB	Baca	3 hr
Aug 10, 8:36 PM MDT	Special Weather Statement	PUB	Las Animas	39 min
Aug 10, 8:37 PM MDT	Special Weather Statement	PUB	Otero	38 min
Aug 11, 4:25 PM MDT	Areal Flood Advisory	PUB	Custer, Pueblo	2 hr

Nearby

Flash Flood Warnings in Colorado, 2017 Every 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.