Alert archive / Colorado / Tornado Warnings in 2002
Tornado Warning 25, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 28, 2002, 7:39 PM MDT for Weld County, Colorado. It was in force for 51 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 28, 2002, 7:39 PM MDT (01:39 UTC)
- Expired
- Aug 28, 2002, 8:30 PM MDT
- In force
- 51 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 59 km from the middle of the area, began a volume at 01:38 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 8:00 PM MDT | Tornado F0 | Hereford, CO | A tornado touched down briefly but did no damage. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 1.7 hours before the alert went out and 141 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
- 233 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 2250 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
901 WFUS55 KBOU 290139 TORDEN COC123-290230- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 731 PM MDT WED AUG 28 2002 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTH CENTRAL WELD COUNTY IN NORTHEAST COLORADO * UNTIL 830 PM MDT * AT 731 PM MDT...THE LAW ENFORCEMENT REPORTED A TORNADO 7 MILES NORTH NEAR BURNS...WYOMING...MOVING SOUTHEAST AT 20 MPH. THIS STORM WILL CROSS THE COLORADO AND WYOMING BORDERS AFTER 745 PM. THIS STORM HAS HAD A HISTORY OF GOLFBALL SIZED HAIL ACROSS SOUTHEAST WYOMING AS WELL. THIS IS A DANGEROUS STORM...TAKE COVER IMMEDIATELY LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...GROVER... HEREFORD AND PAWNEE BUTTES. 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. LAT...LON 4100 10446 4080 10424 4081 10384 4099 10385 SWE
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 7:09 PM MDT | Flash Flood Warning | BOU | Washington | 3 hr |
| Aug 28, 7:39 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 36 min |
| Aug 28, 8:30 PM MDT | Tornado Warning | BOU | Weld | 45 min |
| Aug 28, 9:16 PM MDT | Tornado Warning | BOU | Morgan, Weld | 44 min |
| Aug 29, 3:12 PM MDT | Tornado Warning | BOU | Adams, Arapahoe, Denver, Douglas | 48 min |
| Aug 29, 3:27 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 63 min |
| Aug 29, 3:56 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 54 min |
Nearby
Tornado Warnings in Colorado, 2002Every tornado warning in 2002Tornadoes in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.