Alert archive / Colorado / Tornado Watches in 1999
Tornado Watch 307
The Storm Prediction Center issued this tornado watch at May 22, 1999, 2:00 PM MDT for 20 counties in Colorado; 5 counties in Nebraska; Laramie County, Wyoming. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 22, 1999, 2:00 PM MDT (20:00 UTC)
- Expired
- May 22, 1999, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Cheyenne County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Jefferson County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Teller County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Laramie County, WY
The radar
The Denver radar (KFTG), 125 km from the middle of the area, began a volume at 20:03 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.
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 3:17 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 63 min |
| May 22, 3:23 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 52 min |
| May 22, 3:50 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 60 min |
| May 22, 3:53 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 52 min |
| May 22, 4:14 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 46 min |
| May 22, 4:19 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 61 min |
| May 22, 4:30 PM MDT | Tornado Warning | BOU | Washington | 30 min |
| May 22, 4:50 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 30 min |
| May 22, 4:58 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 47 min |
| May 22, 4:59 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe | 31 min |
| May 22, 5:23 PM MDT | Tornado Warning | GLD | Kit Carson | 62 min |
| May 22, 5:25 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 35 min |
| May 22, 5:33 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 42 min |
| May 22, 5:46 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 59 min |
| May 22, 5:57 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 33 min |
| May 22, 6:04 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 26 min |
| May 22, 6:24 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 61 min |
| May 22, 6:30 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 45 min |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.0 hours before the alert went out and 65 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
- 160 J/kg
- Mixed-layer CIN
- -447 J/kg
- Mixed-layer LCL
- 1826 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:00 PM MDT | Severe Thunderstorm Watch | SPC | Antelope, Blaine, Boone, Boyd, Brown, Burt and 25 more | 7 hr |
| May 22, 3:15 PM MDT | Tornado Watch | SPC | Adams, Buffalo, Chase, Clay, Custer, Dawson and 25 more | 6 hr |
| May 22, 5:30 PM MDT | Severe Thunderstorm Watch | SPC | Burt, Butler, Cass, Colfax, Cuming, Dodge and 15 more | 4 hr |
Nearby
Tornado Watches in Colorado, 1999Tornado Watches in Nebraska, 1999Tornado Watches in Wyoming, 1999Every tornado watch in 1999
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.