Alert archive / Colorado / Flash Flood Warnings in 2004

Flash Flood Warning 5, NWS Denver/Boulder, CO

June 9, 2004Washington County, Colorado

NWS Denver/Boulder, CO issued this flash flood warning at Jun 9, 2004, 6:18 PM MDT for Washington County, Colorado. It was in force for 117 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
Jun 9, 2004, 6:18 PM MDT (00:18 UTC)
Expired
Jun 9, 2004, 8:15 PM MDT
In force
117 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Washington County, CO

The radar

The Denver radar (KFTG), 124 km from the middle of the area, began a volume at 00:19 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 00:00Z, 0.3 hours before the alert went out and 21 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 00:00Z on 2004-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 484 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2004-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.19395878Sfc1 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
484 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
1212 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.2
Supercell composite
6.3

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KBOU 100019
FFWBOU
COC121-100215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
618 PM MDT WED JUN 9 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 815 PM MDT

* AT 618 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN 7 MILES SOUTH OF ARICKAREE SCHOOL...OR ABOUT 37
  MILES SOUTH OF AKRON. THE STORM PRODUCING THE HEAVY RAIN WAS MOVING
  NORTH AT 10 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ANTON...
ARICKAREE SCHOOL...COPE AND THURMAN.

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.

DOPPLER RADAR ESTIMATES THAT AROUND 3 INCHES OF RAIN HAS FALLEN OVER 
SOUTHEAST WASHINGTON COUNTY DURING THE PAST 90 MINUTES.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

LAT...LON 3981 10328 3957 10329 3958 10282 3980 10283

$$

RPK
1 follow-up statement
000 
WGUS75 KBOU 100216
FFSBOU
COC121-100230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
813 PM MDT WED JUN 9 2004

THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR

  SOUTHEASTERN WASHINGTON COUNTY

UNTIL 815 PM MDT HAS EXPIRED.

AT 813 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
RAIN HAD ENDED OVER SOUTHEAST WASHINGTON COUNTY.

DOPPLER RADAR ESTIMATES THAT AROUND 3 INCHES OF RAIN FELL EARLIER 
THIS EVENING OVER SOUTHEAST WASHINGTON COUNTY.  NO REPORTS OF 
FLOODING HAVE BEEN RECEIVED.

LAT...LON 3981 10328 3957 10329 3958 10282 3980 10283

$$

RPK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 6:17 PM MDTFlash Flood WarningBOUMorgan, Weld3 hr
Jun 9, 6:58 PM MDTTornado WarningBOULogan47 min
Jun 9, 7:08 PM MDTFlash Flood WarningBOULogan3 hr
Jun 10, 1:36 PM MDTSevere Thunderstorm WarningBOULogan, Sedgwick54 min

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.