Alert archive / Colorado / Tornado Watches in 1999

Tornado Watch 345

May 31, 199923 counties in Colorado

The Storm Prediction Center issued this tornado watch at May 31, 1999, 3:00 PM MDT for 23 counties in Colorado. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 31, 1999, 3:00 PM MDT (21:00 UTC)
Expired: May 31, 1999, 9:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 23 counties

Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent County, CO, Broomfield County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Larimer County, CO, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO, Washington County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 94 km from the middle of the area, began a volume at 21:02 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

20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 31, 3:04 PM MDT	Severe Thunderstorm Warning	BOU	Weld	26 min
May 31, 3:24 PM MDT	Severe Thunderstorm Warning	BOU	Weld	36 min
May 31, 3:26 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	34 min
May 31, 3:45 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	60 min
May 31, 3:55 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	50 min
May 31, 4:07 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	33 min
May 31, 4:23 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	37 min
May 31, 4:40 PM MDT	Tornado Warning	GLD	Kit Carson	50 min
May 31, 5:12 PM MDT	Tornado Warning	BOU	Morgan, Washington	33 min
May 31, 5:27 PM MDT	Tornado Warning	GLD	Kit Carson	48 min
May 31, 5:40 PM MDT	Tornado Warning	BOU	Washington	35 min
May 31, 5:56 PM MDT	Tornado Warning	BOU	Washington	34 min
May 31, 6:13 PM MDT	Tornado Warning	BOU	Washington	32 min
May 31, 6:29 PM MDT	Tornado Warning	BOU	Lincoln	31 min
May 31, 6:47 PM MDT	Tornado Warning	BOU	Lincoln	28 min
May 31, 7:12 PM MDT	Tornado Warning	BOU	Lincoln	33 min
May 31, 7:30 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	65 min
May 31, 7:37 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Jefferson	38 min
May 31, 7:42 PM MDT	Tornado Warning	BOU	Lincoln	33 min
May 31, 8:28 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	62 min

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.0 hours before the alert went out and 64 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 9 J/kg
Mixed-layer CIN: -409 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -36 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Tornado Watches in Colorado, 1999 Every 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.