Alert archive / Kansas / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 451

July 25, 201539 counties in Kansas; 4 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jul 25, 2015, 3:20 PM CDT for 39 counties in Kansas; 4 counties in Missouri. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jul 25, 2015, 3:20 PM CDT (20:20 UTC)
Expired
Jul 25, 2015, 11:46 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
65 kt
All 43 counties

Anderson County, KS, Atchison County, KS, Barton County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Ottawa County, KS, Pawnee County, KS, Pottawatomie County, KS, Reno County, KS, Rice County, KS, Riley County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Stafford County, KS, Wabaunsee County, KS, Wyandotte County, KS, Cass County, MO, Clay County, MO, Jackson County, MO, Platte County, MO

The radar

The Topeka radar (KTWX), 90 km from the middle of the area, began a volume at 20:19 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
10%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 25, 3:31 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth, Wyandotte29 min
Jul 25, 3:41 PM CDTSevere Thunderstorm WarningTOPDickinson, Geary27 min
Jul 25, 4:02 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth, Wyandotte28 min
Jul 25, 6:00 PM CDTSevere Thunderstorm WarningDDCEllis, Ness, Rush, Trego29 min
Jul 25, 6:05 PM CDTSevere Thunderstorm WarningDDCRush55 min
Jul 25, 7:00 PM CDTSevere Thunderstorm WarningDDCRush45 min
Jul 25, 7:36 PM CDTSevere Thunderstorm WarningDDCPawnee, Rush54 min
Jul 25, 8:47 PM CDTSevere Thunderstorm WarningDDCHodgeman, Ness, Pawnee, Rush58 min
Jul 25, 9:09 PM CDTSevere Thunderstorm WarningEAXAtchison, Doniphan51 min
Jul 25, 9:38 PM CDTSevere Thunderstorm WarningEAXAtchison52 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

Topeka, KS (KFOE), launched 12:00Z, 8.3 hours before the alert went out and 140 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, Topeka, KS at 12:00Z on 2015-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 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, Topeka, KS at 12:00Z on 2015-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
157 J/kg
Mixed-layer CIN
-456 J/kg
Mixed-layer LCL
1208 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-10 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
Jul 25, 12:33 AM CDTMesoscale DiscussionSPCBrown, Doniphan2 hr
Jul 25, 2:55 PM CDTMesoscale DiscussionSPCBarton, Chase, Dickinson, Douglas, Ellsworth, Franklin and 21 more95 min
Jul 25, 4:59 PM CDTMesoscale DiscussionSPCFinney, Ford, Gove, Grant, Gray, Greeley and 15 more91 min
Jul 25, 5:22 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Rawlins2 hr
Jul 25, 6:46 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Barton, Chase, Clay, Cloud and 36 more89 min
Jul 24, 7:49 PM CDTSevere Thunderstorm WatchSPCChristian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more3 hr
Jul 24, 7:51 PM CDTMesoscale DiscussionSPCChristian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more24 min
Jul 24, 9:15 PM CDTMesoscale DiscussionSPCChristian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more60 min

Nearby

Severe Thunderstorm Watches in Kansas, 2015Severe Thunderstorm Watches in Missouri, 2015Every severe thunderstorm watch in 2015

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.