Alert archive / Colorado / Flash Flood Warnings in 2011

Flash Flood Warning 12, NWS Pueblo, CO

August 3, 2011Teller County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 3, 2011, 4:47 PM MDT for Teller 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: Aug 3, 2011, 4:47 PM MDT (22:47 UTC)
Expired: Aug 3, 2011, 7:15 PM MDT
In force: 2 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

County Teller County, CO

The radar

The Denver radar (KFTG), 95 km from the middle of the area, began a volume at 22:48 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 (KDNR), launched 12:00Z, 10.8 hours before the alert went out and 188 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: 15 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 4 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.

389 
WGUS55 KPUB 032247
FFWPUB
COC119-040130-
/O.NEW.KPUB.FF.W.0012.110803T2247Z-110804T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
447 PM MDT WED AUG 3 2011

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN TELLER COUNTY IN CENTRAL COLORADO...

* UNTIL 730 PM MDT

* AT 444 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE   
  WARNED AREA. PUEBLO DOPPLER RADAR ESTIMATED RAINFALL AMOUNTS OF UP 
  TO AN INCH HAS FALLEN ACROSS PORTIONS OF THE HAYMAN BURN SCAR.  
  ADDITIONAL RAINFALL AMOUNTS OF .5 TO 1 INCH WILL BE POSSIBLE 
  THROUGH 545 PM.  THIS AREA RECEIVED HEAVY RAINFALL YESTERDAY AND 
  THIS ADDITIONAL RAINFALL WILL CAUSE FLASH FLOODING WITH THE 
  POTENTIAL FOR MUD FLOWS.  

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR.

JUST A SMALL AMOUNT OF RAINFALL ON A BURN SCAR CAN LEAD TO FLASH 
FLOODING. WATER THAT IS NORMALLY ABSORBED BY VEGETATION...RUNS OFF 
ALMOST INSTANTLY. THIS CAUSES CREEKS AND DRAINAGE AREAS TO FLOOD AT A
MUCH FASTER RATE THAN NORMAL. ADDITIONALLY...THE SOILS IN A BURN SCAR
BECOME UNSTABLE WHEN IT RAINS...RESULTING IN MUD FLOWS AND FALLING 
ROCK. ROADWAYS CAN BE WASHED OUT BY THE FORCE OF THE RUSHING WATER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO .5 TO 1 INCH ARE POSSIBLE IN 
THE WARNED AREA.

&&

LAT...LON 3912 10506 3907 10507 3898 10532 3912 10533

$$

2 follow-up statements

297 
WGUS75 KPUB 032340
FFSPUB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
540 PM MDT WED AUG 3 2011

COC119-040130-
/O.CON.KPUB.FF.W.0012.000000T0000Z-110804T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TELLER CO-
540 PM MDT WED AUG 3 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN TELLER
COUNTY UNTIL 730 PM MDT...

AT 538 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL HAVE MOVED ACROSS THE HAYMAN 
BURN SCAR.  PUEBLO DOPPLER RADAR ESTIMATED RAINFALL AMOUNTS OF UP TO 
1.5 INCHES HAS FALLEN ACROSS PORTIONS OF THE HAYMAN BURN SCAR.  
THUNDERSTORMS HAVE MOVED EAST OF THE AREA...HOWEVER RUNOFF IS 
EXPECTED TO CONTINUE THROUGH 730 PM.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR.

JUST A SMALL AMOUNT OF RAINFALL ON A BURN SCAR CAN LEAD TO FLASH
FLOODING. WATER THAT IS NORMALLY ABSORBED BY VEGETATION...RUNS OFF
ALMOST INSTANTLY. THIS CAUSES CREEKS AND DRAINAGE AREAS TO FLOOD AT A
MUCH FASTER RATE THAN NORMAL. ADDITIONALLY...THE SOILS IN A BURN SCAR
BECOME UNSTABLE WHEN IT RAINS...RESULTING IN MUD FLOWS AND FALLING
ROCK. ROADWAYS CAN BE WASHED OUT BY THE FORCE OF THE RUSHING WATER.

LAT...LON 3912 10506 3907 10507 3898 10532 3912 10533

$$

078 
WGUS75 KPUB 040115
FFSPUB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
715 PM MDT WED AUG 3 2011

COC119-040130-
/O.CAN.KPUB.FF.W.0012.000000T0000Z-110804T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TELLER CO-
715 PM MDT WED AUG 3 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN TELLER
COUNTY IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

JUST A SMALL AMOUNT OF RAINFALL ON A BURN SCAR CAN LEAD TO FLASH
FLOODING. WATER THAT IS NORMALLY ABSORBED BY VEGETATION...RUNS OFF
ALMOST INSTANTLY. THIS CAUSES CREEKS AND DRAINAGE AREAS TO FLOOD AT A
MUCH FASTER RATE THAN NORMAL. ADDITIONALLY...THE SOILS IN A BURN SCAR
BECOME UNSTABLE WHEN IT RAINS...RESULTING IN MUD FLOWS AND FALLING
ROCK. ROADWAYS CAN BE WASHED OUT BY THE FORCE OF THE RUSHING WATER.

LAT...LON 3912 10506 3907 10507 3898 10532 3912 10533

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 6:04 PM MDT	Severe Thunderstorm Warning	PUB	Crowley, Otero, Pueblo	56 min
Aug 2, 6:10 PM MDT	Flash Flood Warning	PUB	Baca, Las Animas, Otero	3 hr
Aug 2, 7:56 PM MDT	Flash Flood Warning	PUB	El Paso	3 hr
Aug 2, 8:04 PM MDT	Areal Flood Advisory	PUB	Bent, Prowers	3 hr
Aug 2, 8:06 PM MDT	Areal Flood Advisory	PUB	Crowley, Kiowa, Otero	3 hr
Aug 2, 9:27 PM MDT	Areal Flood Advisory	PUB	Kiowa	2 hr
Aug 2, 9:34 PM MDT	Areal Flood Advisory	PUB	El Paso, Pueblo	5 hr
Aug 3, 5:20 AM MDT	River Flood Warning	PUB	Pueblo	78 min
Aug 3, 5:26 AM MDT	Flash Flood Watch	PUB	Custer, El Paso, Fremont, Huerfano, Pueblo, Teller	16 hr
Aug 3, 1:35 PM MDT	Areal Flood Advisory	PUB	Las Animas	3 hr
Aug 3, 2:40 PM MDT	Areal Flood Advisory	PUB	Las Animas	62 min
Aug 3, 3:35 PM MDT	Flash Flood Warning	PUB	Las Animas	3 hr
Aug 3, 3:50 PM MDT	Areal Flood Advisory	PUB	Fremont	2 hr
Aug 3, 4:19 PM MDT	Severe Thunderstorm Warning	PUB	Custer, Fremont	41 min
Aug 3, 4:52 PM MDT	Flash Flood Warning	PUB	Custer, Fremont, Pueblo, Saguache	3 hr
Aug 3, 5:17 PM MDT	Flash Flood Warning	PUB	El Paso, Teller	2 hr

Nearby

Flash Flood Warnings in Colorado, 2011 Every flash flood warning in 2011

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.