Alert archive / Colorado / Tornado Warnings in 1998
Tornado Warning 27, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jul 25, 1998, 5:03 PM MDT for Adams County, Denver County, Colorado. It was in force for 27 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 25, 1998, 5:03 PM MDT (23:03 UTC)
- Expired
- Jul 25, 1998, 5:30 PM MDT
- In force
- 27 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Adams County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 23 km from the middle of the area, began a volume at 22:57 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, 11.1 hours before the alert went out and 130 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
- 114 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 1134 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -47 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 252303 RRA
TORDEN
COC001-031-252330-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
503 PM MDT SAT JUL 25 1998
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
WEST CENTRAL ADAMS COUNTY IN NORTHEAST COLORADO
NORTHEASTERN DENVER COUNTY IN NORTHEAST COLORADO
* UNTIL 530 PM MDT
* AT 457 PM MDT...THE PUBLIC REPORTED A FUNNEL CLOUDY JUST NORTH OF
THE BUFFALO RUN GOLF COURSE...EAST OF BRIGHTON. THE THUNDERSTORM
WAS MOVING SOUTH AT 10 MILES PER HOUR.
LOCATIONS IN THE WARNING INCLUDE...DENVER INTERNATIONAL AIRPORT...
BARR LAKE AND BRIGHTON
ADDITIONAL BRIEF FUNNEL CLOUDS OR SMALL TORNADOES MAY DEVELOP.
HEAVY RAINS AND DAMAGING WINDS MAY ALSO OCCUR AS THE THUNDERSTORM
MOVES OVERHEAD.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
LAT...LON 3999 10486 3979 10481 3984 10458 3998 10464
DANKERSThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:28 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe | 3 hr |
| Jul 25, 2:44 PM MDT | Tornado Warning | BOU | Larimer, Weld | 26 min |
| Jul 25, 4:15 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 30 min |
| Jul 25, 4:29 PM MDT | Flash Flood Warning | BOU | Logan | 3 hr |
| Jul 25, 4:50 PM MDT | Flash Flood Warning | BOU | Clear Creek | 115 min |
| Jul 25, 5:07 PM MDT | Flash Flood Warning | BOU | Morgan | 3 hr |
| Jul 25, 5:35 PM MDT | Flash Flood Warning | BOU | Washington | 2 hr |
| Jul 25, 5:41 PM MDT | Flash Flood Warning | BOU | Washington | 2 hr |
Nearby
Tornado Warnings in Colorado, 1998Every tornado warning in 1998Tornadoes 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.