Alert archive / Colorado / Flash Flood Warnings in 2004

Flash Flood Warning 30, NWS Pueblo, CO

August 18, 2004Chaffee County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 18, 2004, 9:27 PM MDT for Chaffee County, Colorado. It was in force for 3 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 18, 2004, 9:27 PM MDT (03:27 UTC)
Expired
Aug 19, 2004, 12:30 AM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Counties, with a storm outline in the text

County Chaffee County, CO

The radar

The Grand Junction radar (KGJX), 159 km from the middle of the area, began a volume at 03:30 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, 3.5 hours before the alert went out and 184 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 2004-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 516 joules per kilogram.LCLEL10008507005003002001001 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 2004-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
516 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1810 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
40 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.

000 
WGUS55 KPUB 190330
FFWPUB
COC015-190630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
927 PM MDT WED AUG 18 2004

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

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

* UNTIL 1230 AM MDT

* AT 926 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS THE CONTINUED
  THREAT FOR MUDSLIDES ALONG COTTONWOOD PASS ROAD WEST OF BUENA 
  VISTA.  

* THE THUNDERSTORM THAT PRODUCED THE HEAVY RAIN HAS MOVED NORTHEAST 
  OF THE REGION.  HOWEVER...SHOWERS AND THUNDERSTORMS ARE DEVELOPING 
  TO THE SOUTH OF THE REGION...AND WILL PASS OVER THE COTTONWOOD 
  PASS ROAD AREA IN THE NEXT THREE HOURS.  THE ADDITIONAL RAIN MAY 
  INCREASE THE THREAT FOR MUDSLIDES.  THIS WARNING EXTENDS THE FLASH 
  FLOOD WARNING ISSUED EARLIER.

IF YOU ARE IN OR CLOSE TO THE WARNED AREA GO TO HIGHER GROUND
IMMEDIATELY. PEOPLE ALONG CREEKS AND DRAINAGE AREAS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATER OR STILL WATER OF UNKNOWN DEPTH ON FOOT
OR BY VEHICLE. AS LITTLE AS 6 INCHES OF WATER MAY CAUSE YOU TO LOSE
CONTROL OF YOUR VEHICLE...AND 2 FEET OF RUSHING WATER CAN CARRY AWAY
MOST VEHICLES...INCLUDING SUVS AND PICKUPS. NEARLY HALF OF ALL FLOOD
FATALITIES ARE VEHICLE RELATED. IF YOUR VEHICLE STALLS IN WATER
ABANDON IT IMMEDIATELY AND GO TO HIGHER GROUND. BE ESPECIALLY
CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF
FLOODING.

LAT...LON 3875 10643 3874 10622 3905 10631 3903 10659

$$
2 follow-up statements
000 
WGUS75 KPUB 190444
FFSPUB
COC015-190645-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
1040 PM MDT WED AUG 18 2004

...THE FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWEST CHAFFEE 
COUNTY UNTIL 1245 AM MDT THURSDAY MORNING...

LAW ENFORCEMENT REPORTS THAT SOME RAIN IS STILL FALLING ALONG 
COTTONWOOD PASS ROAD WEST OF BUENA VISTA.  DRIER AND MORE STABLE AIR 
IS MOVING INTO THE REGION...AND THE RAIN WILL CONTINUE TO DECREASE 
IN INTENSITY.  SCATTERED SHOWERS WILL OCCUR OVER THE POTENTIAL 
MUDSLIDE AREA...BUT THE THREAT FOR HEAVY RAIN HAS DIMINISHED.

WATCH FOR ROCKSLIDES AND MUDSLIDES IN STEEP TERRAIN. WHEN DRIVING...
SLOW DOWN TO AVOID HITTING ROCKS AND MUD ON THE ROADWAY.

$$
000 
WGUS75 KPUB 190640
FFSPUB
COC015-190700-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
1226 AM MDT THU AUG 19 2004

...THE FLASH FLOOD WARNING HAS BEEN CANCELED FOR CHAFFEE COUNTY...

RAINFALL OVER THE EASTERN SAWATCH MOUNTAINS HAS DECREASED IN 
INTENSITY AND THE THREAT OF FLASH FLOODING HAS ENDED.  ACCORDING TO 
CHAFFEE COUNTY SHERIFF COTTONWOOD PASS ROAD REMAINS CLOSED DUE TO A 
MUD SLIDE THAT OCCURRED WEDNESDAY EVENING. LIGHT RAIN WILL CONTINUE 
TO FALL OVER CHAFFEE COUNTY OVERNIGHT WITH THE COVERAGE AND 
INTENSITY DECREASING.

WHILE THE THREAT OF FLASH FLOODING HAS ENDED THERE MAY STILL BE SOME 
LOW AREAS AND NARROW PASSES WHERE WATER MAY BE STANDING ON THE ROAD 
WAY OR WHERE SMALL CREEKS AND STREAMS ARE RUNNING FAST.

DO NOT DRIVE OR WALK INTO WATER OF UNKNOWN DEPTH. AS LITTLE AS 6 
INCHES OF WATER MAY CAUSE YOU TO LOSE CONTROL OF YOUR VEHICLE...AND 
2 FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES...INCLUDING 
SUVS AND PICKUPS. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE 
RELATED. KEEP CHILDREN AND OTHERS AWAY FROM FAST FLOWING WATER. 
FLOODING WILL OCCUR ALONG CREEKS...IN DRAINAGE AREAS...OVER RURAL 
ROADS...IN NORMALLY DRY WASHES AND ARROYOS...AND OVER LOW LYING LAND 
ALONG CREEK BANKS. WATCH FOR ROCKSLIDES AND MUDSLIDES IN STEEP 
TERRAIN. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 6:32 PM MDTFlash Flood WarningPUBChaffee3 hr
Aug 18, 8:50 PM MDTFlash Flood WarningPUBOtero3 hr
Aug 18, 9:44 PM MDTFlash Flood WarningPUBCrowley4 hr
Aug 18, 11:12 PM MDTFlash Flood WarningPUBBent3 hr
Aug 18, 11:32 PM MDTFlash Flood WarningPUBOtero3 hr
Aug 19, 4:30 AM MDTFlash Flood WarningPUBCrowley3 hr

Nearby

Flash Flood Warnings in Colorado, 2004Every flash flood warning in 2004

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.