Alert archive / Nebraska / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 417

July 26, 201614 counties in Nebraska; 13 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 26, 2016, 5:05 PM MDT for 14 counties in Nebraska; 13 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 26, 2016, 5:05 PM MDT (23:05 UTC)
Expired
Jul 26, 2016, 11:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 27 counties

Arthur County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Garden County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Logan County, NE, McPherson County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Brule County, SD, Charles Mix County, SD, Custer County, SD, Fall River County, SD, Gregory County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 136 km from the middle of the area, began a volume at 23:05 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
Jul 26, 5:11 PM MDTSevere Thunderstorm WarningABRLyman49 min
Jul 26, 5:15 PM MDTSevere Thunderstorm WarningUNRMellette, Todd60 min
Jul 26, 5:35 PM MDTSevere Thunderstorm WarningUNRCuster, Fall River55 min
Jul 26, 5:43 PM MDTSevere Thunderstorm WarningABRJones47 min
Jul 26, 5:50 PM MDTSevere Thunderstorm WarningUNRTripp19 min
Jul 26, 6:00 PM MDTFlash Flood WarningUNRMellette, Todd6 hr
Jul 26, 6:13 PM MDTSevere Thunderstorm WarningUNRTodd62 min
Jul 26, 6:28 PM MDTSevere Thunderstorm WarningUNRFall River, Oglala Lakota42 min
Jul 26, 6:29 PM MDTSevere Thunderstorm WarningUNRTripp61 min
Jul 26, 6:38 PM MDTTornado WarningUNRFall River16 min
Jul 26, 6:42 PM MDTSevere Thunderstorm WarningFSDCharles Mix, Gregory48 min
Jul 26, 6:54 PM MDTSevere Thunderstorm WarningUNRTodd66 min
Jul 26, 7:00 PM MDTSevere Thunderstorm WarningLBFSheridan60 min
Jul 26, 7:01 PM MDTSevere Thunderstorm WarningLBFCherry44 min
Jul 26, 7:07 PM MDTSevere Thunderstorm WarningUNRTripp53 min
Jul 26, 7:24 PM MDTSevere Thunderstorm WarningLBFCherry51 min
Jul 26, 7:30 PM MDTSevere Thunderstorm WarningLBFSheridan45 min
Jul 26, 7:34 PM MDTSevere Thunderstorm WarningUNRBennett, Todd56 min
Jul 26, 7:49 PM MDTSevere Thunderstorm WarningLBFCherry41 min
Jul 26, 7:54 PM MDTTornado WarningLBFCherry36 min
Jul 26, 8:10 PM MDTSevere Thunderstorm WarningLBFCherry, Sheridan50 min
Jul 26, 8:13 PM MDTSevere Thunderstorm WarningLBFCherry47 min
Jul 26, 8:28 PM MDTSevere Thunderstorm WarningLBFCherry, Garden, Grant, Sheridan44 min
Jul 26, 10:36 PM MDTSevere Thunderstorm WarningLBFBlaine, Custer, Lincoln, Logan, Loup, McPherson54 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

Rapid City, SD (KRAP), launched 12:00Z, 11.1 hours before the alert went out and 174 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, Rapid City, SD at 12:00Z on 2016-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 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, Rapid City, SD at 12:00Z on 2016-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
1292 J/kg
Mixed-layer CIN
-232 J/kg
Mixed-layer LCL
2137 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
83 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
Jul 26, 4:32 PM MDTMesoscale DiscussionSPCBoyd, Brown, Cherry, Dawes, Keya Paha, Rock and 1 more118 min
Jul 26, 11:09 AM MDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Clark and 17 more96 min

Nearby

Severe Thunderstorm Watches in Nebraska, 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.