Alert archive / Colorado / Flash Flood Warnings in 2015

Flash Flood Warning 37, NWS Pueblo, CO

July 29, 2015Chaffee County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 29, 2015, 8:40 PM MDT for Chaffee 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 29, 2015, 8:40 PM MDT (02:40 UTC)
Expired: Jul 29, 2015, 10:45 PM MDT
In force: 2 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

County Chaffee County, CO

The radar

The Grand Junction radar (KGJX), 176 km from the middle of the area, began a volume at 02:41 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 00:00Z, 2.7 hours before the alert went out and 202 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4235 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

286 
WGUS55 KPUB 300240
FFWPUB
COC015-300445-
/O.NEW.KPUB.FF.W.0037.150730T0240Z-150730T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
840 PM MDT WED JUL 29 2015

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CHAFFEE COUNTY IN CENTRAL COLORADO...

* UNTIL 1045 PM MDT

* AT 839 PM MDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...THE ROAD TO 
  COTTONWOOD PASS WEST OF BUENA VISTA. FLASH FLOODING AND LANDSLIDES 
  WILL BE PROBABLE ALONG THE ROADWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3886 10617 3881 10616 3879 10624 3884 10625

$$

TLM

2 follow-up statements

934 
WGUS75 KPUB 300302
FFSPUB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
902 PM MDT WED JUL 29 2015

COC015-300445-
/O.CON.KPUB.FF.W.0037.000000T0000Z-150730T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHAFFEE CO-
902 PM MDT WED JUL 29 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT FOR
NORTHERN CHAFFEE COUNTY...

AT 900 PM MDT...DOPPLER RADAR INDICATED HEAVY RAIN HAD MOVED CLOSER 
TO BUENA VISTA ALONG COTTONWOOD PASS ROAD. UP TO ONE INCH OF RAIN 
HAS ALREADY FALLEN. 

EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE LANDSLIDES ALONG 
COTTONWOOD PASS ROAD. THE LANDSLIDES WILL CONSIST OF 
ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
COTTONWOOD PASS ROAD WEST OF BUENA VISTA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ACT QUICKLY TO PROTECT YOUR LIFE. TURN AROUND...DONT DROWN WHEN 
ENCOUNTERING FLOODED AND DEBRIS FILLED ROADS. 

&&

LAT...LON 3886 10617 3881 10616 3879 10624 3884 10625

$$

TLM

833 
WGUS75 KPUB 300326
FFSPUB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
926 PM MDT WED JUL 29 2015

COC015-300331-
/O.CAN.KPUB.FF.W.0037.000000T0000Z-150730T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHAFFEE CO-
926 PM MDT WED JUL 29 2015

...THE FLASH FLOOD WARNING FOR NORTHERN CHAFFEE COUNTY IS
CANCELLED...

HEAVY RAIN HAS ENDED AND FLOOD WATERS HAVE RECEDED...AND ARE NO 
LONGER EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. 

NO MAJOR LANDSLIDES WERE REPORTED BY LAW ENFORCEMENT WHO DROVE THE 
COTTONWOOD PASS ROAD WHERE THE THUNDERSTORM OCCURRED.

LAT...LON 3886 10617 3881 10616 3879 10624 3884 10625

$$

TLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 7:47 PM MDT	Special Weather Statement	PUB	Chaffee	28 min
Jul 29, 8:02 PM MDT	Areal Flood Advisory	PUB	Chaffee	58 min
Jul 29, 8:27 PM MDT	Special Weather Statement	PUB	Chaffee	33 min
Jul 29, 9:09 PM MDT	Special Weather Statement	PUB	Chaffee	36 min
Jul 30, 11:36 AM MDT	Special Weather Statement	PUB	Prowers	39 min

Nearby

Flash Flood Warnings in Colorado, 2015 Every flash flood warning in 2015

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.