Alert archive / Kansas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 440

August 5, 201723 counties in Kansas; 7 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Aug 5, 2017, 4:06 PM CDT for 23 counties in Kansas; 7 counties in Oklahoma. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Aug 5, 2017, 4:06 PM CDT (21:06 UTC)
Expired
Aug 5, 2017, 11:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 30 counties

Barber County, KS, Barton County, KS, Butler County, KS, Comanche County, KS, Cowley County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Marion County, KS, McPherson County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Rush County, KS, Russell County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Ellis County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Woods County, OK, Woodward County, OK

The radar

The Wichita radar (KICT), 88 km from the middle of the area, began a volume at 21:06 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
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 5, 4:25 PM CDTSevere Thunderstorm WarningICTButler50 min
Aug 5, 4:29 PM CDTSevere Thunderstorm WarningDDCBarber, Pratt46 min
Aug 5, 4:30 PM CDTSevere Thunderstorm WarningDDCBarber, Comanche60 min
Aug 5, 4:30 PM CDTSevere Thunderstorm WarningDDCBarber, Comanche60 min
Aug 5, 4:59 PM CDTSevere Thunderstorm WarningICTCowley46 min
Aug 5, 5:10 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woodward65 min
Aug 5, 5:13 PM CDTSevere Thunderstorm WarningICTButler47 min
Aug 5, 5:27 PM CDTSevere Thunderstorm WarningDDCBarber48 min
Aug 5, 5:38 PM CDTSevere Thunderstorm WarningICTKingman37 min
Aug 5, 5:41 PM CDTSevere Thunderstorm WarningICTHarvey, Reno, Sedgwick35 min
Aug 5, 5:41 PM CDTSevere Thunderstorm WarningICTCowley49 min
Aug 5, 6:00 PM CDTSevere Thunderstorm WarningICTSumner60 min
Aug 5, 6:09 PM CDTSevere Thunderstorm WarningDDCStafford51 min
Aug 5, 6:12 PM CDTSevere Thunderstorm WarningDDCBarber33 min
Aug 5, 6:13 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods62 min
Aug 5, 6:29 PM CDTSevere Thunderstorm WarningOUNEllis, Woodward61 min
Aug 5, 6:36 PM CDTSevere Thunderstorm WarningOUNAlfalfa39 min
Aug 5, 6:39 PM CDTSevere Thunderstorm WarningDDCBarber51 min
Aug 5, 6:40 PM CDTSevere Thunderstorm WarningICTHarper50 min
Aug 5, 6:52 PM CDTSevere Thunderstorm WarningICTCowley53 min
Aug 5, 6:58 PM CDTSevere Thunderstorm WarningICTCowley, Sumner47 min
Aug 5, 7:11 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant34 min
Aug 5, 7:19 PM CDTSevere Thunderstorm WarningOUNKay41 min
Aug 5, 8:03 PM CDTSevere Thunderstorm WarningICTButler, Cowley17 min
Aug 5, 8:18 PM CDTSevere Thunderstorm WarningICTCowley20 min
Aug 5, 8:21 PM CDTSevere Thunderstorm WarningOUNKay54 min
Aug 5, 8:46 PM CDTSevere Thunderstorm WarningOUNGrant, Kay44 min
Aug 5, 9:13 PM CDTSevere Thunderstorm WarningOUNKay32 min
Aug 5, 10:33 PM CDTFlash Flood WarningOUNKay3 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

Dodge City, (KDDC), launched 12:00Z, 9.1 hours before the alert went out and 129 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, Dodge City, at 12:00Z on 2017-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 593 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, Dodge City, at 12:00Z on 2017-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 342 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
593 J/kg
Mixed-layer CIN
-321 J/kg
Mixed-layer LCL
1352 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
342 m²/s²
0-3 km storm-relative helicity
425 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 3:25 PM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Barton, Bourbon, Butler and 53 more2 hr
Aug 5, 6:11 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Comanche, Cowley and 15 more94 min

Nearby

Severe Thunderstorm Watches in Kansas, 2017Severe Thunderstorm Watches in Oklahoma, 2017Every severe thunderstorm watch in 2017

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.