Alert archive / Colorado / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 414

July 24, 201613 counties in Colorado; 4 counties in Kansas

The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 2016, 4:25 PM MDT for 13 counties in Colorado; 4 counties in Kansas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 24, 2016, 4:25 PM MDT (22:25 UTC)
Expired
Jul 24, 2016, 9:38 PM MDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Adams County, CO, Arapahoe County, CO, Cheyenne 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, Cheyenne County, KS, Greeley County, KS, Sherman County, KS, Wallace County, KS

The radar

The Denver radar (KFTG), 96 km from the middle of the area, began a volume at 22:27 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
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 24, 4:25 PM MDTSevere Thunderstorm WarningBOUWeld50 min
Jul 24, 4:28 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe47 min
Jul 24, 4:41 PM MDTSevere Thunderstorm WarningBOUAdams, Denver, Weld49 min
Jul 24, 4:53 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln52 min
Jul 24, 4:53 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld37 min
Jul 24, 5:07 PM MDTSevere Thunderstorm WarningBOUAdams, Morgan, Weld38 min
Jul 24, 5:34 PM MDTSevere Thunderstorm WarningBOUMorgan41 min
Jul 24, 6:06 PM MDTSevere Thunderstorm WarningBOULogan, Washington39 min
Jul 24, 6:10 PM MDTSevere Thunderstorm WarningBOULincoln, Washington50 min
Jul 24, 6:17 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma23 min
Jul 24, 6:31 PM MDTSevere Thunderstorm WarningGLDCheyenne44 min
Jul 24, 6:33 PM MDTSevere Thunderstorm WarningGLDYuma27 min
Jul 24, 6:53 PM MDTSevere Thunderstorm WarningGLDCheyenne25 min
Jul 24, 7:09 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma35 min
Jul 24, 7:12 PM MDTSevere Thunderstorm WarningBOUWashington16 min
Jul 24, 8:12 PM MDTSevere Thunderstorm WarningGLDGreeley33 min
Jul 24, 8:29 PM MDTSevere Thunderstorm WarningGLDKit Carson31 min
Jul 24, 8:36 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma39 min
Jul 24, 8:38 PM MDTSevere Thunderstorm WarningGLDGreeley37 min
Jul 24, 9:10 PM MDTSevere Thunderstorm WarningGLDGreeley, Wichita17 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, 10.4 hours before the alert went out and 26 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 2016-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 85 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2016-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.19395878Sfc1 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
85 J/kg
Mixed-layer CIN
-345 J/kg
Mixed-layer LCL
2128 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
57 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
Jul 24, 1:50 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Baca, Bent, Boulder, Broomfield and 28 more115 min

Nearby

Severe Thunderstorm Watches in Colorado, 2016Severe Thunderstorm Watches in Kansas, 2016Every severe thunderstorm watch in 2016

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.