Alert archive / Colorado / Flash Flood Warnings in 1998
Flash Flood Warning 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 30, 1998, 7:27 PM MDT for Lincoln County, Colorado. It was in force for 93 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
- Jul 30, 1998, 7:27 PM MDT (01:27 UTC)
- Expired
- Jul 30, 1998, 9:00 PM MDT
- In force
- 93 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Lincoln County, CO
The radar
The Pueblo radar (KPUX), 55 km from the middle of the area, began a volume at 01:27 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, 1.5 hours before the alert went out and 128 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
- 10 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 945 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 310131
FFWDEN
COC073-310300-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
727 PM MDT THU JUL 30 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SOUTHERN LINCOLN COUNTY IN EAST CENTRAL COLORADO
* UNTIL 900 PM MDT
* THE FLASH FLOOD WARNING FROM EXTREME SOUTHEAST ELBERT COUNTY
WILL EXPIRE AT 730 PM MDT.
* SCATTERED THUNDERSTORMS...WITH LOCALLY HEAVY RAIN...WILL CONTINUE
THIS EVENING. A FEW STORMS MAY STILL PRODUCE FROM 1 TO 2 INCHES OF
RAIN IN 30 MINUTES. SINCE THE HEAVIEST RAIN OCCURRED BETWEEN PUNKIN
CENTER AND KARVAL...RUSH CREEK AND BIG SANDY CREEK WILL BE
ESPECIALLY SUSCEPTIBLE TO FLASH FLOODING.
LOCATIONS IN THE WARNING INCLUDE...FORDER AND KARVAL
EXCESSIVE RUNOFF WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND
STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL
AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. AVOID TRAVELING
THE COUNTY ROADS IN SOUTHERN LINCOLN COUNTY AS THEY MAY BE WASHED
OUT.
LAT...LON 3884 10403 3863 10401 3864 10321 3885 10322 3885 10367
COOPERWhat forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 30, 7:20 PM MDT, 7 minutes before
COZ035-036-038>047-049-310400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 720 PM MDT THU JUL 30 1998 THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE FLASH FLOOD WATCH FOR ALL OF NORTHEAST COLORADO INCLUDING THE FOOTHILLS AND MOUNTAIN AREAS EAST OF THE CONTINENTAL DIVIDE. ALTHOUGH SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE STILL POSSIBLE THIS EVENING THE THREAT OF HEAVY RAINFALL HAS DIMINISHED ACROSS NORTHEAST COLORADO AND IN THE FOOTHILLS AND MOUNTAIN AREAS EAST OF THE CONTINENTAL DIVIDE. HOWEVER OVER EAST CENTRAL COLORADO THE WATCH REMAINS IN EFFECT FOR SOUTHERN LINCOLN COUNTY UNTIL 10 PM WHERE THE THREAT OF ADDITIONAL HEAVY RAIN IS POSSIBLE. A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE WITHIN THE WATCH AREA. PEOPLE IN THE WATCH AREA ARE ADVISED TO CHECK PREPAREDNESS REQUIREMENTS...KEEP INFORMED...AND BE READY FOR QUICK ACTION IF FLASH FLOODING THREATENS. KLEYLA x
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 6:00 PM MDT | Flash Flood Warning | BOU | Lincoln | 45 min |
| Jul 30, 6:00 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 45 min |
| Jul 30, 8:56 PM MDT | Flash Flood Warning | BOU | Lincoln | 2 hr |
| Jul 31, 3:15 PM MDT | Flash Flood Warning | BOU | Clear Creek, Gilpin, Jefferson | 60 min |
| Jul 31, 3:15 PM MDT | Severe Thunderstorm Warning | BOU | Clear Creek, Gilpin, Jefferson | 60 min |
| Jul 31, 5:05 PM MDT | Flash Flood Warning | BOU | Jefferson | 85 min |
| Jul 31, 5:50 PM MDT | Flash Flood Warning | BOU | Douglas | 85 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.