Alert archive / Colorado / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 477

June 15, 200424 counties in Colorado

The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2004, 1:20 PM MDT for 24 counties in Colorado. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 15, 2004, 1:20 PM MDT (19:20 UTC)
Expired
Jun 15, 2004, 9:00 PM MDT
In force
8 hr
Issued by
the Storm Prediction Center
All 24 counties

Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent 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, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Prowers County, CO, Pueblo County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO

The radar

The Denver radar (KFTG), 119 km from the middle of the area, began a volume at 19:19 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

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

IssuedProductOfficeCountiesLasted
Jun 15, 2:15 PM MDTSevere Thunderstorm WarningPUBEl Paso60 min
Jun 15, 2:23 PM MDTSevere Thunderstorm WarningBOUElbert52 min
Jun 15, 2:31 PM MDTTornado WarningBOUDouglas44 min
Jun 15, 2:32 PM MDTTornado WarningBOUDouglas43 min
Jun 15, 2:54 PM MDTTornado WarningBOUArapahoe, Elbert36 min
Jun 15, 3:15 PM MDTSevere Thunderstorm WarningPUBEl Paso60 min
Jun 15, 3:29 PM MDTTornado WarningBOUArapahoe, Elbert46 min
Jun 15, 3:33 PM MDTTornado WarningBOUAdams42 min
Jun 15, 4:15 PM MDTSevere Thunderstorm WarningPUBEl Paso60 min
Jun 15, 4:59 PM MDTTornado WarningBOUElbert, Lincoln46 min
Jun 15, 5:03 PM MDTSevere Thunderstorm WarningPUBBaca57 min
Jun 15, 5:15 PM MDTTornado WarningPUBBaca60 min
Jun 15, 5:20 PM MDTSevere Thunderstorm WarningPUBEl Paso55 min
Jun 15, 5:42 PM MDTTornado WarningBOULincoln48 min
Jun 15, 5:50 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson55 min
Jun 15, 5:55 PM MDTSevere Thunderstorm WarningPUBProwers65 min
Jun 15, 6:10 PM MDTSevere Thunderstorm WarningBOULogan, Phillips, Sedgwick50 min
Jun 15, 6:47 PM MDTSevere Thunderstorm WarningGLDCheyenne58 min
Jun 15, 6:57 PM MDTSevere Thunderstorm WarningGLDYuma63 min
Jun 15, 6:58 PM MDTSevere Thunderstorm WarningBOULogan, Phillips, Sedgwick62 min
Jun 15, 7:31 PM MDTSevere Thunderstorm WarningBOULogan, Phillips, Sedgwick29 min
Jun 15, 7:45 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson45 min
Jun 15, 7:59 PM MDTSevere Thunderstorm WarningBOUPhillips, Sedgwick61 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 7.3 hours before the alert went out and 55 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2004-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2004-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2740 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 14, 9:32 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 9 more88 min
Jun 14, 10:00 PM MDTSevere Thunderstorm WatchSPCProwers5 hr
Jun 15, 12:53 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Baca, Bent, Boulder, Broomfield and 23 more2 hr

Nearby

Severe Thunderstorm Watches in Colorado, 2004Every severe thunderstorm watch in 2004

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.