Alert archive / Nebraska / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 465

September 4, 20164 states

The Storm Prediction Center issued this severe thunderstorm watch at Sep 4, 2016, 2:24 PM MDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Sep 4, 2016, 2:24 PM MDT (20:24 UTC)
Expired
Sep 4, 2016, 9:46 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 67 counties

Cheyenne County, CO, Kit Carson County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Boyd County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Wheeler County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 143 km from the middle of the area, began a volume at 20:27 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
20%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 4, 2:43 PM MDTSevere Thunderstorm WarningUNROglala Lakota48 min
Sep 4, 2:45 PM MDTSevere Thunderstorm WarningGLDCheyenne, Kit Carson45 min
Sep 4, 3:01 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill29 min
Sep 4, 3:09 PM MDTSevere Thunderstorm WarningGLDYuma51 min
Sep 4, 3:15 PM MDTSevere Thunderstorm WarningGLDGreeley, Wichita45 min
Sep 4, 3:16 PM MDTSevere Thunderstorm WarningUNRJackson74 min
Sep 4, 3:22 PM MDTSevere Thunderstorm WarningUNRBennett53 min
Sep 4, 3:23 PM MDTSevere Thunderstorm WarningUNRFall River53 min
Sep 4, 3:26 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Morrill, Scotts Bluff49 min
Sep 4, 3:39 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill45 min
Sep 4, 3:41 PM MDTSevere Thunderstorm WarningCYSMorrill49 min
Sep 4, 3:43 PM MDTSevere Thunderstorm WarningGLDYuma51 min
Sep 4, 3:50 PM MDTSevere Thunderstorm WarningLBFChase40 min
Sep 4, 3:54 PM MDTSevere Thunderstorm WarningGLDCheyenne, Rawlins, Sherman, Thomas51 min
Sep 4, 3:58 PM MDTSevere Thunderstorm WarningGLDLogan, Wichita47 min
Sep 4, 4:00 PM MDTSevere Thunderstorm WarningUNRMellette60 min
Sep 4, 4:09 PM MDTSevere Thunderstorm WarningCYSBox Butte, Morrill, Scotts Bluff, Sioux36 min
Sep 4, 4:12 PM MDTSevere Thunderstorm WarningBOUPhillips48 min
Sep 4, 4:14 PM MDTSevere Thunderstorm WarningCYSMorrill31 min
Sep 4, 4:25 PM MDTSevere Thunderstorm WarningLBFChase, Perkins35 min
Sep 4, 4:40 PM MDTFlash Flood WarningGLDGreeley, Logan, Wichita6 hr
Sep 4, 4:42 PM MDTSevere Thunderstorm WarningBOUPhillips, Sedgwick29 min
Sep 4, 4:43 PM MDTSevere Thunderstorm WarningGLDLogan, Wichita62 min
Sep 4, 4:46 PM MDTSevere Thunderstorm WarningCYSMorrill44 min
Sep 4, 4:56 PM MDTSevere Thunderstorm WarningLBFDeuel, Garden, Keith, Perkins34 min
Sep 4, 4:56 PM MDTSevere Thunderstorm WarningUNRMellette, Todd64 min
Sep 4, 5:00 PM MDTSevere Thunderstorm WarningUNRFall River, Oglala Lakota54 min
Sep 4, 5:11 PM MDTSevere Thunderstorm WarningGLDLogan64 min
Sep 4, 5:11 PM MDTSevere Thunderstorm WarningLBFSheridan49 min
Sep 4, 5:21 PM MDTSevere Thunderstorm WarningLBFArthur, Garden, Keith24 min
Sep 4, 5:27 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington48 min
Sep 4, 5:28 PM MDTSevere Thunderstorm WarningLBFGarden, Sheridan47 min
Sep 4, 5:36 PM MDTTornado WarningBOUMorgan, Washington15 min
Sep 4, 5:40 PM MDTSevere Thunderstorm WarningUNRBennett, Jackson, Oglala Lakota65 min
Sep 4, 5:48 PM MDTSevere Thunderstorm WarningLBFArthur, Grant42 min
Sep 4, 5:55 PM MDTSevere Thunderstorm WarningBOULogan, Washington18 min
Sep 4, 6:00 PM MDTSevere Thunderstorm WarningBOULogan22 min
Sep 4, 6:06 PM MDTSevere Thunderstorm WarningGLDGove, Logan54 min
Sep 4, 6:12 PM MDTFlash Flood WarningGLDGove, Logan5 hr
Sep 4, 6:26 PM MDTSevere Thunderstorm WarningLBFCherry, Grant, Hooker49 min
Sep 4, 6:27 PM MDTSevere Thunderstorm WarningGLDGreeley, Logan, Wallace, Wichita48 min
Sep 4, 6:31 PM MDTSevere Thunderstorm WarningUNRBennett, Jackson, Mellette, Todd74 min
Sep 4, 6:45 PM MDTSevere Thunderstorm WarningGLDDecatur, Rawlins, Sheridan, Thomas45 min
Sep 4, 7:01 PM MDTSevere Thunderstorm WarningGLDGreeley44 min
Sep 4, 7:13 PM MDTSevere Thunderstorm WarningLBFBlaine32 min
Sep 4, 7:14 PM MDTSevere Thunderstorm WarningGLDLogan, Wallace, Wichita46 min
Sep 4, 7:18 PM MDTSevere Thunderstorm WarningGLDDecatur20 min
Sep 4, 7:21 PM MDTFlash Flood WarningGLDGreeley4 hr
Sep 4, 7:28 PM MDTSevere Thunderstorm WarningUNRMellette, Todd, Tripp77 min
Sep 4, 7:36 PM MDTSevere Thunderstorm WarningGLDGreeley, Logan, Wichita39 min
Sep 4, 7:39 PM MDTSevere Thunderstorm WarningLBFLogan, McPherson, Thomas51 min
Sep 4, 7:43 PM MDTSevere Thunderstorm WarningLBFBlaine, Brown36 min
Sep 4, 7:50 PM MDTSevere Thunderstorm WarningGLDGove, Logan, Sheridan22 min
Sep 4, 7:53 PM MDTTornado WarningLBFLogan, McPherson37 min
Sep 4, 8:04 PM MDTSevere Thunderstorm WarningGLDLogan, Wallace, Wichita41 min
Sep 4, 8:09 PM MDTSevere Thunderstorm WarningGLDGove, Logan36 min
Sep 4, 8:14 PM MDTSevere Thunderstorm WarningLBFMcPherson46 min
Sep 4, 8:29 PM MDTSevere Thunderstorm WarningLBFBlaine, Custer, Logan, Thomas46 min
Sep 4, 8:33 PM MDTSevere Thunderstorm WarningGLDGove, Logan30 min
Sep 4, 8:41 PM MDTSevere Thunderstorm WarningUNRTripp34 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, 8.4 hours before the alert went out and 167 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 2016-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 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, N. Platte/Lee Bi, NE at 12:00Z on 2016-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 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
89 J/kg
Mixed-layer CIN
-363 J/kg
Mixed-layer LCL
945 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 3, 7:47 PM MDTMesoscale DiscussionSPCKit Carson, Yuma118 min
Sep 3, 9:48 PM MDTMesoscale DiscussionSPCYuma117 min
Sep 4, 1:46 PM MDTMesoscale DiscussionSPCLogan, Phillips, Sedgwick, Yuma119 min
Sep 4, 1:54 PM MDTMesoscale DiscussionSPCCheyenne2 hr
Sep 4, 5:07 PM MDTMesoscale DiscussionSPCKit Carson, Logan, Phillips, Sedgwick, Yuma113 min
Sep 4, 3:01 PM MDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Edmunds and 13 more89 min
Sep 4, 3:53 PM MDTSevere Thunderstorm WatchSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 23 more7 hr
Sep 4, 5:56 PM MDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Clark and 25 more94 min

Nearby

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