Alert archive / Colorado / Flash Flood Warnings in 2004

Flash Flood Warning 16, NWS Denver/Boulder, CO

July 15, 2004Logan County, Colorado

NWS Denver/Boulder, CO issued this flash flood warning at Jul 15, 2004, 10:19 PM MDT for Logan 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
Jul 15, 2004, 10:19 PM MDT (04:19 UTC)
Expired
Jul 16, 2004, 1:30 AM MDT
In force
3 hr
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Logan County, CO

The radar

The Denver radar (KFTG), 128 km from the middle of the area, began a volume at 04:19 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, 4.3 hours before the alert went out and 83 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 2004-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 181 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, Denver, CO at 00:00Z on 2004-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
181 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
3171 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
11 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 160420
FFWBOU
COC075-160715-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1019 PM MDT THU JUL 15 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWEST LOGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 130 AM MDT

* AT 1013 PM MDT...THE LOGAN COUNTY SHERIFF REPORTED 2 TO 4 FEET OF 
WATER FLOWING ACROSS COUNTY ROAD 18 TO THE EAST AND TO THE WEST OF 
WILLARD.  RAINFALL IN THE AREA WAS DECREASING...BUT RUNOFF FROM 
EARLIER THUNDERSTORMS WILL CAUSE SAND CREEK AND OTHER SMALL STREAMS 
TO OVERFLOW THEIR BANKS FOR THE NEXT FEW HOURS.  

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...LOGAN
CORNERS...PAWNEE PASS AND WILLARD.

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODS AND FLASH FLOODS. DO NOT STAY IN AREAS SUBJECT TO 
FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4063 10358 4053 10356 4052 10336 4066 10326

$$

BARJENBRUCH
1 follow-up statement
000 
WGUS75 KBOU 160450
FFSBOU
COC075-160505-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1050 PM MDT THU JUL 15 2004

...THE FLASH FLOOD WARNING FOR SOUTHWEST LOGAN COUNTY HAS BEEN 
CANCELLED...

THE LOGAN COUNTY SHERIFF REPORTED ONLY 2 TO 4 INCHES OF WATER ON 
COUNTY ROAD 18 TO THE EAST AND WEST OF WILLARD.  THERE WAS NOT 2 TO 
4 FEET OF WATER FLOWING ACROSS THE ROAD.

LAT...LON 4063 10358 4053 10356 4052 10336 4066 10326

$$

BARJENBRUCH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 7:11 PM MDTSevere Thunderstorm WarningBOUPhillips49 min
Jul 16, 2:37 PM MDTFlash Flood WarningBOUDouglas113 min
Jul 16, 3:20 PM MDTFlash Flood WarningBOUPark60 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.