Alert archive / Nebraska / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 90

April 15, 20165 counties in Colorado; 8 counties in Kansas; 17 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Apr 15, 2016, 1:51 PM MDT for 5 counties in Colorado; 8 counties in Kansas; 17 counties in Nebraska. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 15, 2016, 1:51 PM MDT (19:51 UTC)
Expired
Apr 15, 2016, 9:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 30 counties

Cheyenne County, CO, Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Chase County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 74 km from the middle of the area, began a volume at 19:53 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

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

IssuedProductOfficeCountiesLasted
Apr 15, 2:49 PM MDTSevere Thunderstorm WarningGLDCheyenne41 min
Apr 15, 3:01 PM MDTSevere Thunderstorm WarningGLDCheyenne44 min
Apr 15, 3:05 PM MDTSevere Thunderstorm WarningGLDKit Carson25 min
Apr 15, 3:21 PM MDTTornado WarningGLDCheyenne24 min
Apr 15, 3:28 PM MDTSevere Thunderstorm WarningGLDKit Carson17 min
Apr 15, 3:40 PM MDTSevere Thunderstorm WarningGLDYuma24 min
Apr 15, 3:43 PM MDTSevere Thunderstorm WarningGLDCheyenne32 min
Apr 15, 3:50 PM MDTSevere Thunderstorm WarningGLDKit Carson40 min
Apr 15, 4:01 PM MDTFlash Flood WarningGLDCheyenne3 hr
Apr 15, 4:08 PM MDTSevere Thunderstorm WarningGLDCheyenne37 min
Apr 15, 4:16 PM MDTFlash Flood WarningGLDCheyenne, Kit Carson3 hr
Apr 15, 4:25 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson50 min
Apr 15, 4:26 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson49 min
Apr 15, 4:38 PM MDTSevere Thunderstorm WarningGLDYuma19 min
Apr 15, 4:40 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson50 min
Apr 15, 4:41 PM MDTTornado WarningGLDKit Carson34 min
Apr 15, 5:04 PM MDTTornado WarningGLDKit Carson26 min
Apr 15, 5:25 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma50 min
Apr 15, 5:29 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson46 min
Apr 15, 5:33 PM MDTSevere Thunderstorm WarningLBFGarden27 min
Apr 15, 5:55 PM MDTSevere Thunderstorm WarningGLDYuma50 min
Apr 15, 6:27 PM MDTFlash Flood WarningGLDKit Carson, Yuma10 hr
Apr 15, 6:58 PM MDTFlash Flood WarningGLDCheyenne, Kit Carson9 hr
Apr 15, 8:13 PM MDTFlash Flood WarningGLDCheyenne, Sherman8 hr

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, 7.9 hours before the alert went out and 114 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 2016-04-15Temperature 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 2016-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
195 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
Apr 15, 1:07 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Phillips, Sedgwick, Yuma53 min
Apr 15, 1:25 PM MDTMesoscale DiscussionSPCBoulder, Clear Creek, Gilpin, Grand, Jackson, Larimer and 2 more6 hr
Apr 15, 1:38 PM MDTMesoscale DiscussionSPCBaca, Prowers2 hr
Apr 15, 1:57 PM MDTTornado WatchSPCBaca, Bent, Kiowa, Prowers7 hr
Apr 15, 4:47 PM MDTMesoscale DiscussionSPCKit Carson, Yuma88 min
Apr 15, 5:51 PM MDTMesoscale DiscussionSPCBaca, Prowers114 min

Nearby

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