Alert archive / Colorado / Flash Flood Warnings in 2000

Flash Flood Warning 8, NWS Denver/Boulder, CO

August 16, 2000Larimer County, Colorado

NWS Denver/Boulder, CO issued this flash flood warning at Aug 16, 2000, 3:55 PM MDT for Larimer County, Colorado. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 16, 2000, 3:55 PM MDT (21:55 UTC)
Expired
Aug 16, 2000, 5:00 PM MDT
In force
65 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Larimer County, CO

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.9 hours before the alert went out and 190 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, Denver, CO at 12:00Z on 2000-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 110 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, Denver, CO at 12:00Z on 2000-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
110 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1743 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
86 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 KBOU 162156
FFWBOU
COC069-162300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
355 PM MDT WED AUG 16 2000

THE NATIONAL WEATHER SERVICE IN DENVER HAS CONTINUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL LARIMER COUNTY IN NORTH CENTRAL COLORADO

* UNTIL 500 PM MDT

* AT 350 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER THE BOBCAT BURN AREA JUST NORTH OF DRAKE IN
SOUTH CENTRAL LARIMER COUNTY...OR ABOUT 20 MILES SOUTHWEST OF FORT
COLLINS.  THE STORMS PRODUCING THE HEAVY RAIN WERE MOVING SLOWLY
EAST AT 5 TO 10 MPH.  OTHER STORMS PRODUCING HEAVY RAIN WERE WEST OF
THE BURN AREA AND WILL BE MOVING INTO THE AREA BY 415 PM MDT.

DOPPLER RADAR ESTIMATES OF UP TO 3 INCHES HAVE FALLEN OVER THE BURN
AREA SINCE 1230 PM.  LARIMER COUNTY EMERGENCY MANAGEMENT OFFICE
REPORTED THE MAIN ACCESS ROAD TO THE AREA HAD WASHED OUT.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAU*GHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 4047 10541 4042 10529 4042 10521 4050 10531

LESZCYNSKI

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 15, 6:00 PM MDTSevere Thunderstorm WarningBOUWeld30 min
Aug 16, 1:45 PM MDTFlash Flood WarningBOULarimer2 hr

Nearby

Flash Flood Warnings in Colorado, 2000Every flash flood warning in 2000

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.