Alert archive / Colorado / Flash Flood Warnings in 1998
Flash Flood Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 25, 1998, 6:26 PM MDT for Arapahoe County, Denver County, Douglas 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 25, 1998, 6:26 PM MDT (00:26 UTC)
- Expired
- Jul 25, 1998, 9:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Arapahoe County, CO, Denver County, CO, Douglas County, CO
The radar
The Denver radar (KFTG), 41 km from the middle of the area, began a volume at 00:26 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, 0.4 hours before the alert went out and 150 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
- 204 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1605 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 260028
FFWDEN
COC005-031-035-260300-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
626 PM MDT SAT JUL 25 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EXTREME SOUTHWESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO
SOUTHWESTERN DENVER COUNTY IN NORTHEAST COLORADO
NORTHERN DOUGLAS COUNTY IN NORTHEAST COLORADO
* UNTIL 900 PM MDT
* AT 625 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
TORRENTIAL RAIN OVER SOUTHWEST DENVER...MOVING SOUTHEAST AT
10 MILES PER HOUR.
RADAR INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAD ALREADY FALLEN
OVER SOUTHWEST DENVER COUNTY. EXTREMELY HEAVY RAIN WAS QUICKLY
DEVELOPING SOUTHEASTWARD TOWARDS HIGHLANDS RANCH AND PARKER.
PEOPLE IN THE WARNING AREA CAN EXPECT TOTAL RAINFALL AMOUNTS OF 2 TO
4 INCHES...WITH THE HEAVIEST BETWEEN DENVER AND HIGHLANDS RANCH.
LOCATIONS IN THE WARNING INCLUDE...SOUTHWESTERN DENVER...ENGLEWOOD...
LITTLETON...BEVERLY HILLS...GREENWOOD VILLAGE...HIGHLANDS RANCH...
LOUVIERS...PARKER...SEDALIA...SHERIDAN AND SURREY RIDGE
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. MOVE TO HIGHER
GROUND IMMEDIATELY.
LAT...LON 3974 10505 3942 10506 3939 10480 3957 10474
BARJENBRUCHNearby
Flash Flood Warnings in Colorado, 1998Every flash flood warning in 1998
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.