Alert archive / Colorado / Flash Flood Warnings in 2003
Flash Flood Warning 12, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 18, 2003, 10:09 PM MDT for 4 counties in 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 18, 2003, 10:09 PM MDT (04:09 UTC)
- Expired
- Jul 19, 2003, 1:15 AM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
Counties Arapahoe County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO
The radar
The Denver radar (KFTG), 35 km from the middle of the area, began a volume at 04:09 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, 4.2 hours before the alert went out and 143 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.
- Mixed-layer CAPE
- 1403 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 2946 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS55 KBOU 190412
FFWBOU
COC005-031-035-039-190715-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1009 PM MDT FRI JUL 18 2003
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN ELBERT COUNTY IN EAST CENTRAL COLORADO
WESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO
SOUTHWESTERN DENVER COUNTY IN NORTHEAST COLORADO
THIS INCLUDES THE CITY OF DENVER
NORTHEASTERN DOUGLAS COUNTY IN NORTHEAST COLORADO
* UNTIL 115 AM MDT
* AT 1009 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER SOUTHEASTERN CENTENNIAL...OR ABOUT 14 MILES
SOUTHEAST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS MOVING
NORTHEAST AT 20 MPH.
LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
SOUTHWESTERN AURORA...CENTENNIAL...DENVER...ENGLEWOOD...LITTLETON...
ARAPAHOE PARK...ELIZABETH...GREENWOOD VILLAGE...HIGHLANDS RANCH...
PARKER...PONDEROSA PARK...SHERIDAN...SURREY RIDGE AND THE PINERY.
AUTOMATED RAINFALL GAUGES HAVE INDICATED UP TO AN INCH OF RAIN IN
JUST THE LAST 20 MINUTES ACROSS AURORA. THE VERY HEAVY RAINFALL HAS
MOVED VERY LITTLE IN THE PAST 30 MINUTES.
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.
LAT...LON 3958 10505 3931 10461 3946 10445 3979 10490
3975 10507
$$
ENTREKIN3 follow-up statements
000 WGUS75 KBOU 190506 FFSBOU COC005-031-035-039-190715- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1105 PM MDT FRI JUL 18 2003 A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN ELBERT COUNTY WESTERN ARAPAHOE COUNTY DENVER COUNTY NORTHEASTERN DOUGLAS COUNTY UNTIL 115 AM MDT. AT 1050 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN OVER NORTHEASTERN CENTENNIAL...OR ABOUT 14 MILES SOUTHEAST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS MOVING SLOWLY NORTHEAST AT 10 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SOUTHWESTERN AURORA...CENTENNIAL...DENVER...ENGLEWOOD...NORTHERN LITTLETON...ARAPAHOE PARK...ELIZABETH...GREENWOOD VILLAGE...HIGHLANDS RANCH...PARKER...PONDEROSA PARK...SHERIDAN...SURREY RIDGE AND THE PINERY. SPOTTER REPORTS AND AUTOMATED RAINFALL GAUGES INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAVE FALLEN IN LESS THAN AN HOUR. THE HEAVIEST RAIN FELL FROM CENTRAL DENVER...AND STRETCHING SOUTHEAST THROUGH AURORA...PARKER...AND PONDEROSA PARK. THE HEAVIEST RAIN HAS SHIFTED SLIGHTLY TO THE NORTH...SO THE RAIN HAS DECREASED IN THE AURORA AREA. EVEN THOUGH THE HEAVIEST RAIN HAS SUBSIDED...FLASH FLOODING CAN STILL BE EXPECTED THROUGH 1 AM. DAMAGE REPORTS INDICATED INTERSTATE 25 WAS FLOODED IN SPOTS ALONG THE T-REX PROJECT INCLUDING EVANS...AND ALONG ARAPAHOE AND PARKER ROADS. CREEKS WHICH EXPERIENCED FLOODING INCLUDED GOLDSMITH GULCH THROUGH THE BIBLE PARK AREA, CHERRY CREEK, AND TOLLGATE CREEK. SOME BASEMENTS WERE ALSO REPORTED IN THE AURORA AREA. 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. LAT...LON 3958 10505 3931 10461 3946 10445 3979 10490 3975 10507 $$ ENTREKIN
000 WGUS75 KBOU 190544 FFSBOU COC005-031-035-039-190715- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1140 PM MDT FRI JUL 18 2003 A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN ELBERT COUNTY WESTERN ARAPAHOE COUNTY DENVER COUNTY NORTHEASTERN DOUGLAS COUNTY UNTIL 115 AM MDT. AT 1130 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVY RAIN HAS SHIFTED NORTHWARD INTO ADAMS AND SOUTHERN WELD COUNTIES. ONLY SCATTERED LIGHT RAIN SHOWERS REMAIN IN THE FLASH FLOOD WARNING LOCATIONS....WHERE RAINFALL RATES WILL BE UNDER A TENTH OF AN INCH IN 30 MINUTES. DESPITE THE LACK OF CURRENT RAINFALL...ONGOING FLOODING WILL REMAIN IN THE WARNING LOCATIONS THROUGH 1 AM. LOCATIONS REMAINING IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SOUTHWESTERN AURORA...CENTENNIAL...DENVER...ENGLEWOOD...NORTHERN LITTLETON...ARAPAHOE PARK...ELIZABETH...GREENWOOD VILLAGE...HIGHLANDS RANCH...PARKER...PONDEROSA PARK...SHERIDAN...SURREY RIDGE AND THE PINERY. SPOTTER REPORTS AND AUTOMATED RAINFALL GAUGES INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAD FALLEN IN LESS THAN AN HOUR. THE HEAVIEST RAIN FELL FROM CENTRAL DENVER...AND STRETCHING SOUTHEAST THROUGH AURORA...PARKER...AND PONDEROSA PARK. CURRENT REPORTS INDICATED FLOODING AT THE INTERSECTIONS AT EVANS AND MONACO...14TH AND JERSEY...AND ALAMEDA AND STEELE. INTERSTATE 25 IS CURRENTLY CLOSED FROM SANTE FE SOUTHBOUND TO INTERSTATE 225 DUE TO FLOODING AND ACCIDENTS. CREEKS WHICH EXPERIENCED FLOODING INCLUDED GOLDSMITH GULCH THROUGH THE BIBLE PARK AREA...CHERRY CREEK...AND TOLLGATE CREEK. SOME BASEMENTS WERE ALSO REPORTED FLOODED IN THE AURORA AREA. 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. LAT...LON 3958 10505 3931 10461 3946 10445 3979 10490 3975 10507 $$ ENTREKIN
000 WGUS75 KBOU 190704 FFSBOU COC005-031-035-039-190720- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 105 AM MDT SAT JUL 19 2003 THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE FOR NORTHWESTERN ELBERT COUNTY WESTERN ARAPAHOE COUNTY DENVER COUNTY NORTHEASTERN DOUGLAS COUNTY AT 1255 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED JUST A FEW LINGERING SHOWERS ACROSS AURORA AND STRETCHING ACROSS WESTERN ELBERT AND CENTRAL ARAPAHOE COUNTIES. ADDITIONAL RAINFALL WILL BE UNDER A TENTH OF AN INCH THROUGH 2 AM. LOCAL OFFICIALS IN THE WARNING AREAS REPORTED NO NEW LIFE THREATENING FLOODING PROBLEMS. INTERSTATE 25 IS STILL CLOSED FROM SANTE FE TO INTERSTATE 225 DUE TO STANDING WATER. NO CURRENT MAJOR FLOODING PROBLEMS HAVE BEEN REPORTED IN THE AURORA AREA...AND THE COUNTIES OF ELBERT AND DOUGLAS. EARLIER...SPOTTER REPORTS AND AUTOMATED RAINFALL GAUGES INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAD FALLEN IN LESS THAN AN HOUR BETWEEN 945 PM AND 1045 PM. THE HEAVIEST RAIN FELL FROM CENTRAL DENVER...AND STRETCHING SOUTHEAST THROUGH AURORA...PARKER...AND PONDEROSA PARK. CREEKS WHICH EXPERIENCED EARLIER FLOODING LIKE GOLDSMITH GULCH ...CHERRY CREEK...AND TOLLGATE CREEK...HAVE NOW BEGUN TO RECEED. LAT...LON 3958 10505 3931 10461 3946 10445 3979 10490 3975 10507 $$ ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 6:21 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 54 min |
| Jul 18, 7:15 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 60 min |
| Jul 18, 7:29 PM MDT | Tornado Warning | BOU | Weld | 46 min |
| Jul 18, 8:00 PM MDT | Flash Flood Warning | BOU | Jefferson | 3 hr |
| Jul 18, 8:16 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 59 min |
| Jul 18, 8:52 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 53 min |
| Jul 18, 9:47 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Sedgwick | 58 min |
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.