Alert archive / Colorado / Flash Flood Warnings in 2003

Flash Flood Warning 13, NWS Denver/Boulder, CO

July 19, 2003Jefferson County, Colorado

NWS Denver/Boulder, CO issued this flash flood warning at Jul 19, 2003, 6:40 PM MDT for Jefferson 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 19, 2003, 6:40 PM MDT (00:40 UTC)
Expired
Jul 19, 2003, 9:45 PM MDT
In force
3 hr
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Jefferson County, CO

The radar

The Denver radar (KFTG), 76 km from the middle of the area, began a volume at 00:41 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, 0.7 hours before the alert went out and 181 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 2003-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1216 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 2003-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.193958Sfc1 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
1216 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
2545 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
-2 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 200044
FFWBOU
COC059-200345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
640 PM MDT SAT JUL 19 2003

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL JEFFERSON COUNTY IN NORTHEAST COLORADO...INCLUDING   
  THE BUFFALO CREEK AREA.

* UNTIL 945 PM MDT

* AT 640 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN OVER BUFFALO CREEK. THE STORM PRODUCING THE HEAVY 
RAIN WAS MOVING SOUTHEAST AT 20 MPH. 

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...BUFFALO 
CREEK AND SOUTH PLATTE. RADAR INDICATED UP TO 2 INCHES OF RAIN HAVE 
FALLEN IN THE BUFFALO CREEK AREA AND LEADING SOUTHEAST THROUGH SAND 
DRAW AND SPRING CREEK. 

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 THE BUFFALO CREEK BURN AREA.


LAT...LON 3938 10531 3933 10527 3937 10517 3941 10518

$$

ENTREKIN
1 follow-up statement
000 
WGUS75 KBOU 200218
FFSBOU
COC059-200230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
809 PM MDT SAT JUL 19 2003

THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR

  SOUTH CENTRAL JEFFERSON COUNTY AND BUFFALO CREEK AREA

HAS BEEN CANCELLED.

AT 809 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
HEAVY RAIN HAS ENDED ACROSS THE BUFFALO CREEK AREA. RADAR INDICATED 
IN EXCESS OF 2 INCHES OF RAIN HAD FALLEN OVER THE BUFFALO CREEK 
AREA. COUNTY OFFICIALS REPORTED NO FLOODING PROBLEMS IN THE BUFFALO 
CREEK AREA.

JEFFERSON COUNTY OFFICIALS ALSO REPORTED POSSIBLE STREAM FLOODING 
ALONG BRUSH CREEK...JUST SOUTH OF TRUMBULL AND NORTH OF DECKERS. NO 
ADDITIONAL INFORMATION IS AVAILABLE AT THIS TIME. STAY TUNED FOR 
FURTHER STATEMENTS.  


LAT...LON 3938 10531 3933 10527 3937 10517 3941 10518

$$

ENTREKIN

Nearby

Flash Flood Warnings in Colorado, 2003Every flash flood warning in 2003

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.