Alert archive / Colorado / Tornado Warnings in 2000
Tornado Warning 29, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jul 20, 2000, 4:39 PM MDT for Morgan County, Colorado. It was in force for 51 min. 2 reports came from 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, with what was reported inside it.
The facts
- Issued
- Jul 20, 2000, 4:39 PM MDT (22:39 UTC)
- Expired
- Jul 20, 2000, 5:30 PM MDT
- In force
- 51 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Morgan County, CO
The radar
The Denver radar (KFTG), 87 km from the middle of the area, began a volume at 22:39 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 |
|---|---|---|---|
| Jul 20, 4:50 PM MDT | Hail 1.75 | Ft Morgan, CO | |
| Jul 20, 5:05 PM MDT | Hail 1.5 | Weldona, CO |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 20, 1:45 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.7 hours before the alert went out and 87 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
- 409 J/kg
- Mixed-layer CIN
- -401 J/kg
- Mixed-layer LCL
- 1545 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KBOU 202239 TORDEN COC087-202330- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 439 PM MDT THU JUL 20 2000 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN MORGAN COUNTY IN NORTHEAST COLORADO * UNTIL 530 PM MDT * AT 439 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH A POSSIBLE TORNADO NEAR JACKSON RESERVOIR...OR ABOUT 16 MILES NORTHWEST OF FORT MORGAN...MOVING SOUTHEAST AT 25 MPH. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... WELDONA...JACKSON RESERVOIR...GOODRICH AND ANTELOPE SPRINGS. 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. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SELEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. LAT...LON 4051 10413 4030 10411 4029 10370 4050 10369 KLEYLA
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:21 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Weld | 24 min |
| Jul 19, 7:45 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 45 min |
| Jul 19, 8:26 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 34 min |
| Jul 20, 2:42 PM MDT | Tornado Warning | BOU | Weld | 48 min |
| Jul 20, 3:16 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 44 min |
| Jul 20, 3:28 PM MDT | Tornado Warning | BOU | Weld | 47 min |
| Jul 20, 3:54 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 51 min |
| Jul 20, 4:05 PM MDT | Tornado Warning | BOU | Morgan, Weld | 40 min |
| Jul 20, 4:08 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Washington | 52 min |
| Jul 20, 4:32 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 43 min |
| Jul 20, 4:51 PM MDT | Tornado Warning | BOU | Washington | 24 min |
| Jul 20, 4:54 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 51 min |
| Jul 20, 5:05 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 40 min |
| Jul 20, 5:16 PM MDT | Tornado Warning | BOU | Washington | 29 min |
| Jul 20, 5:18 PM MDT | Tornado Warning | BOU | Adams, Morgan | 42 min |
| Jul 20, 5:44 PM MDT | Tornado Warning | BOU | Adams, Arapahoe, Washington | 46 min |
Nearby
Tornado Warnings in Colorado, 2000Every tornado warning in 2000Tornadoes in 2000
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.