Alert archive / Kansas / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 464

September 3, 2016Cheyenne County, Kit Carson County, Yuma County, Colorado; 15 counties in Kansas; 5 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Sep 3, 2016, 5:31 PM MDT for Cheyenne County, Kit Carson County, Yuma County, Colorado; 15 counties in Kansas; 5 counties in Nebraska. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Sep 3, 2016, 5:31 PM MDT (23:31 UTC)
Expired
Sep 4, 2016, 1:00 AM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 23 counties

Cheyenne County, CO, Kit Carson County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Ellis County, KS, Gove County, KS, Graham County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Dundy County, NE, Furnas County, NE, Harlan County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 64 km from the middle of the area, began a volume at 23:35 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
5%
Ten or more severe wind reports
20%
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

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

IssuedProductOfficeCountiesLasted
Sep 3, 5:38 PM MDTSevere Thunderstorm WarningGLDGraham, Sheridan52 min
Sep 3, 5:41 PM MDTSevere Thunderstorm WarningGLDRed Willow49 min
Sep 3, 5:45 PM MDTSevere Thunderstorm WarningGLDDecatur, Norton60 min
Sep 3, 5:49 PM MDTFlash Flood WarningGLDRed Willow9 hr
Sep 3, 5:53 PM MDTSevere Thunderstorm WarningGLDKit Carson38 min
Sep 3, 6:08 PM MDTSevere Thunderstorm WarningGLDSherman52 min
Sep 3, 6:11 PM MDTSevere Thunderstorm WarningGLDCheyenne, Rawlins49 min
Sep 3, 6:13 PM MDTTornado WarningGLDGraham32 min
Sep 3, 6:26 PM MDTFlash Flood WarningGLDDecatur, Norton10 hr
Sep 3, 6:44 PM MDTSevere Thunderstorm WarningGLDGraham46 min
Sep 3, 6:45 PM MDTSevere Thunderstorm WarningGLDRed Willow45 min
Sep 3, 6:49 PM MDTSevere Thunderstorm WarningGLDCheyenne21 min
Sep 3, 6:56 PM MDTSevere Thunderstorm WarningGLDCheyenne, Rawlins49 min
Sep 3, 7:00 PM MDTFlash Flood WarningGLDCheyenne, Rawlins8 hr
Sep 3, 7:11 PM MDTFlash Flood WarningGLDGraham9 hr
Sep 3, 7:37 PM MDTSevere Thunderstorm WarningGLDYuma53 min
Sep 3, 7:43 PM MDTSevere Thunderstorm WarningGLDSherman47 min
Sep 3, 7:52 PM MDTFlash Flood WarningGLDRed Willow7 hr
Sep 3, 8:09 PM MDTFlash Flood WarningGLDGraham, Norton8 hr
Sep 3, 8:12 PM MDTSevere Thunderstorm WarningGLDThomas25 min
Sep 3, 8:38 PM MDTFlash Flood WarningGLDDecatur, Rawlins6 hr
Sep 3, 8:51 PM MDTSevere Thunderstorm WarningGLDGraham39 min
Sep 3, 9:31 PM MDTSevere Thunderstorm WarningGLDCheyenne26 min
Sep 3, 10:18 PM MDTSevere Thunderstorm WarningGLDGraham42 min
Sep 3, 10:29 PM MDTSevere Thunderstorm WarningGLDCheyenne, Rawlins46 min
Sep 3, 10:35 PM MDTSevere Thunderstorm WarningGIDRooks55 min
Sep 3, 10:53 PM MDTFlash Flood WarningGIDPhillips, Rooks8 hr
Sep 3, 10:57 PM MDTSevere Thunderstorm WarningGLDGraham33 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.5 hours before the alert went out and 163 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, N. Platte/Lee Bi, NE at 12:00Z on 2016-09-03Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2016-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
305 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 3, 1:51 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Yuma114 min
Sep 2, 6:28 PM MDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Greeley, Kearny and 9 more2 hr

Nearby

Severe Thunderstorm Watches in Kansas, 2016Severe Thunderstorm Watches in Nebraska, 2016Severe Thunderstorm Watches in Colorado, 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.