Alert archive / Colorado / Flash Flood Warnings in 1998
Flash Flood Warning 32, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 9, 1998, 5:21 PM MDT for Lincoln County, Washington County, Colorado. It was in force for 99 min. 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
- Aug 9, 1998, 5:21 PM MDT (23:21 UTC)
- Expired
- Aug 9, 1998, 7:00 PM MDT
- In force
- 99 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Lincoln County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 93 km from the middle of the area, began a volume at 23:23 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 12:00Z, 11.4 hours before the alert went out and 43 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
- 13 J/kg
- Mixed-layer CIN
- -340 J/kg
- Mixed-layer LCL
- 2304 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 11 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 092323
FFWDEN
COC073-121-100100-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
521 PM MDT SUN AUG 9 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO
SOUTHWESTERN WASHINGTON COUNTY IN NORTHEAST COLORADO
* UNTIL 700 PM MDT
* AT 511 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER NORTH CENTRAL LINCOLN COUNTY...OR ABOUT 21
MILES NORTHEAST OF LIMON. THIS STORM HAS MOVED VERY LITTLE DURING
THE LAST 30 MINUTES.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMAXLLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
ENTREKIN
LAT...LON 3955 10363 3942 10350 3954 10332 3967 10344The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 6:20 PM MDT | Flash Flood Warning | BOU | Morgan | 85 min |
| Aug 8, 6:25 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 50 min |
| Aug 8, 7:12 PM MDT | Flash Flood Warning | BOU | Morgan | 93 min |
| Aug 8, 8:59 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 31 min |
| Aug 9, 3:35 AM MDT | Flash Flood Warning | BOU | Lincoln | 3 hr |
| Aug 9, 3:38 AM MDT | Flash Flood Warning | BOU | Lincoln | 3 hr |
| Aug 9, 3:02 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 43 min |
| Aug 9, 3:32 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 43 min |
| Aug 9, 3:38 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 52 min |
| Aug 9, 3:48 PM MDT | Tornado Warning | BOU | Adams | 27 min |
| Aug 9, 3:57 PM MDT | Tornado Warning | BOU | Morgan, Weld | 48 min |
| Aug 9, 4:01 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 44 min |
| Aug 9, 4:33 PM MDT | Flash Flood Warning | BOU | Adams, Morgan | 117 min |
| Aug 9, 4:43 PM MDT | Tornado Warning | BOU | Adams, Morgan, Weld | 32 min |
| Aug 9, 4:49 PM MDT | Flash Flood Warning | BOU | Washington | 86 min |
| Aug 9, 4:52 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 38 min |
Nearby
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.