Alert archive / Colorado / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 293

June 14, 201414 counties in Colorado; 4 counties in Nebraska; Laramie County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jun 14, 2014, 2:29 PM MDT for 14 counties in Colorado; 4 counties in Nebraska; Laramie County, Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 14, 2014, 2:29 PM MDT (20:29 UTC)
Expired
Jun 14, 2014, 9:58 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt

Counties Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Denver County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Laramie County, WY

The radar

The Denver radar (KFTG), 96 km from the middle of the area, began a volume at 20:30 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 14, 3:00 PM MDTSevere Thunderstorm WarningBOUAdams, Denver, Weld30 min
Jun 14, 3:09 PM MDTSevere Thunderstorm WarningCYSLaramie51 min
Jun 14, 3:28 PM MDTSevere Thunderstorm WarningBOUArapahoe, Denver32 min
Jun 14, 3:52 PM MDTSevere Thunderstorm WarningBOUArapahoe23 min
Jun 14, 4:21 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert24 min
Jun 14, 4:26 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe34 min
Jun 14, 4:41 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln, Washington34 min
Jun 14, 4:58 PM MDTTornado WarningBOULincoln32 min
Jun 14, 5:19 PM MDTTornado Warning Tornado observedBOULincoln, Washington26 min
Jun 14, 5:40 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma65 min
Jun 14, 5:49 PM MDTSevere Thunderstorm WarningBOUWashington26 min
Jun 14, 6:09 PM MDTSevere Thunderstorm WarningBOULincoln36 min
Jun 14, 6:13 PM MDTSevere Thunderstorm WarningBOUWashington32 min
Jun 14, 6:14 PM MDTSevere Thunderstorm WarningGLDYuma46 min
Jun 14, 6:26 PM MDTSevere Thunderstorm WarningGLDKit Carson64 min
Jun 14, 6:48 PM MDTSevere Thunderstorm WarningGLDKit Carson57 min
Jun 14, 6:55 PM MDTSevere Thunderstorm WarningGLDYuma50 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 (KDEN), launched 12:00Z, 8.5 hours before the alert went out and 79 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 2014-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3768 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
97 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, 2:06 PM MDTMesoscale DiscussionSPCKit Carson, Morgan, Phillips, Washington, Yuma114 min
Jun 14, 5:40 PM MDTTornado WatchSPCKit Carson, Yuma4 hr
Jun 13, 6:11 PM MDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Dawes, Garden, Kimball and 4 more2 hr
Jun 14, 12:57 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Cedar, Clay and 29 more2 hr
Jun 14, 4:10 PM MDTTornado WatchSPCAdams, Antelope, Boone, Burt, Butler, Cedar and 35 more7 hr
Jun 14, 5:22 PM MDTMesoscale DiscussionSPCDundy, Frontier, Furnas, Gosper, Hayes, Hitchcock and 2 more83 min

Nearby

Severe Thunderstorm Watches in Colorado, 2014Severe Thunderstorm Watches in Nebraska, 2014Severe Thunderstorm Watches in Wyoming, 2014Every severe thunderstorm watch in 2014

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.