Alert archive / Kansas / Tornado Watches in 2018

Tornado Watch 61

May 2, 201857 counties in Kansas

The Storm Prediction Center issued this tornado watch at May 2, 2018, 12:43 PM CDT for 57 counties in Kansas. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2018, 12:43 PM CDT (17:43 UTC)
Expired
May 2, 2018, 9:18 PM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
70 kt
All 57 counties

Anderson County, KS, Barber County, KS, Barton County, KS, Brown County, KS, Butler County, KS, Chase County, KS, Clark County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Comanche County, KS, Cowley County, KS, Dickinson County, KS, Douglas County, KS, Edwards County, KS, Elk County, KS, Ellsworth County, KS, Ford County, KS, Franklin County, KS, Geary County, KS, Gray County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Hodgeman County, KS, Jackson County, KS, Jefferson County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Meade County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pawnee County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Seward County, KS, Shawnee County, KS, Stafford County, KS, Sumner County, KS, Wabaunsee County, KS, Washington County, KS

The radar

The Wichita radar (KICT), 78 km from the middle of the area, began a volume at 17:48 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
70%
One or more EF2 to EF5 tornadoes
60%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
70%
Ten or more severe hail reports
80%
One or more hailstones of 2 inches or more
80%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 2, 1:18 PM CDTSevere Thunderstorm WarningDDCClark, Ford, Meade57 min
May 2, 1:23 PM CDTSevere Thunderstorm WarningDDCEdwards, Ford, Hodgeman, Kiowa52 min
May 2, 1:58 PM CDTSevere Thunderstorm WarningDDCClark, Edwards, Ford, Hodgeman, Kiowa, Pawnee62 min
May 2, 2:05 PM CDTTornado WarningDDCEdwards, Ford, Kiowa25 min
May 2, 2:25 PM CDTSevere Thunderstorm WarningDDCPawnee, Rush65 min
May 2, 2:31 PM CDTSevere Thunderstorm WarningDDCEdwards, Kiowa, Pawnee, Pratt, Stafford44 min
May 2, 2:33 PM CDTSevere Thunderstorm WarningICTBarton72 min
May 2, 2:52 PM CDTSevere Thunderstorm WarningDDCPawnee, Stafford38 min
May 2, 3:07 PM CDTSevere Thunderstorm WarningDDCPratt, Stafford38 min
May 2, 3:13 PM CDTSevere Thunderstorm WarningDDCPratt, Stafford17 min
May 2, 3:17 PM CDTSevere Thunderstorm WarningICTBarton, Ellsworth, Rice, Russell34 min
May 2, 3:27 PM CDTSevere Thunderstorm WarningDDCStafford32 min
May 2, 3:27 PM CDTSevere Thunderstorm WarningICTReno78 min
May 2, 3:38 PM CDTSevere Thunderstorm WarningDDCPratt, Stafford52 min
May 2, 3:39 PM CDTSevere Thunderstorm WarningICTEllsworth, Rice81 min
May 2, 3:41 PM CDTSevere Thunderstorm WarningTOPOttawa64 min
May 2, 3:44 PM CDTSevere Thunderstorm WarningICTLincoln, Saline40 min
May 2, 3:52 PM CDTTornado WarningTOPOttawa38 min
May 2, 4:05 PM CDTSevere Thunderstorm WarningICTReno70 min
May 2, 4:08 PM CDTSevere Thunderstorm WarningTOPCloud52 min
May 2, 4:11 PM CDTTornado WarningTOPCloud49 min
May 2, 4:13 PM CDTTornado WarningTOPOttawa47 min
May 2, 4:18 PM CDTSevere Thunderstorm WarningICTMcPherson, Reno, Rice57 min
May 2, 4:21 PM CDTTornado WarningTOPOttawa39 min
May 2, 4:29 PM CDTTornado WarningTOPClay, Cloud, Washington46 min
May 2, 4:33 PM CDTSevere Thunderstorm WarningICTKingman57 min
May 2, 4:40 PM CDTSevere Thunderstorm WarningICTReno45 min
May 2, 4:40 PM CDTSevere Thunderstorm WarningTOPClay, Dickinson, Ottawa65 min
May 2, 4:48 PM CDTSevere Thunderstorm WarningTOPClay57 min
May 2, 4:58 PM CDTSevere Thunderstorm WarningDDCBarber, Pratt47 min
May 2, 4:58 PM CDTTornado WarningTOPClay, Marshall, Riley, Washington47 min
May 2, 5:02 PM CDTSevere Thunderstorm WarningICTMcPherson29 min
May 2, 5:08 PM CDTSevere Thunderstorm WarningTOPGeary, Pottawatomie, Riley67 min
May 2, 5:25 PM CDTSevere Thunderstorm WarningICTMcPherson, Marion31 min
May 2, 5:34 PM CDTTornado WarningTOPMarshall, Pottawatomie, Riley41 min
May 2, 6:03 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Marshall, Nemaha, Pottawatomie57 min
May 2, 6:41 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Jefferson64 min
May 2, 7:03 PM CDTSevere Thunderstorm WarningICTChase28 min
May 2, 7:06 PM CDTSevere Thunderstorm WarningTOPLyon, Morris39 min
May 2, 7:38 PM CDTSevere Thunderstorm WarningTOPCoffey, Lyon, Osage52 min
May 2, 7:48 PM CDTTornado WarningTOPCoffey, Osage27 min
May 2, 7:56 PM CDTSevere Thunderstorm WarningTOPCoffey36 min
May 2, 8:12 PM CDTTornado WarningTOPAnderson, Coffey, Franklin, Osage33 min
May 2, 8:15 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey45 min
May 2, 8:31 PM CDTTornado WarningTOPAnderson, Franklin29 min
May 2, 8:40 PM CDTSevere Thunderstorm WarningTOPDouglas20 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

Dodge City, (KDDC), launched 12:00Z, 5.7 hours before the alert went out and 172 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 2018-05-02Temperature 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 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 2018-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
2321 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

084 
WWUS20 KWNS 021741
SEL1  
SPC WW 021741
KSZ000-030300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 61
NWS Storm Prediction Center Norman OK
1245 PM CDT Wed May 2 2018

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  A large part of Kansas

* Effective this Wednesday afternoon and evening from 1245 PM
  until 1000 PM CDT.

* Primary threats include...
  A few tornadoes and a couple intense tornadoes likely
  Widespread large hail and scattered very large hail events to 3
    inches in diameter likely
  Widespread damaging winds and isolated significant gusts to 80
    mph likely

SUMMARY...Numerous to widespread severe storms will develop from
southwest into central and northeast Kansas this afternoon. Damaging
winds, very large hail, and tornadoes are expected.

The tornado watch area is approximately along and 90 statute miles
east and west of a line from 30 miles southwest of Medicine Lodge KS
to 50 miles west northwest of Saint Joseph MO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24045.

...Grams

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 1, 7:24 PM CDTMesoscale DiscussionSPCBarber, Barton, Brown, Clay, Cloud, Dickinson and 25 more2 hr
May 1, 9:06 PM CDTMesoscale DiscussionSPCAtchison, Barton, Brown, Butler, Chase, Clay and 33 more54 min
May 2, 11:36 AM CDTMesoscale DiscussionSPCBarber, Chase, Clark, Comanche, Dickinson, Edwards and 15 more2 hr
May 2, 2:47 PM CDTMesoscale DiscussionSPCEdwards, Kiowa, McPherson, Rice, Stafford118 min
May 2, 5:08 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 1 more97 min
May 2, 5:18 PM CDTMesoscale DiscussionSPCAtchison, Barber, Brown, Butler, Chase, Clay and 28 more87 min
May 2, 5:27 PM CDTTornado WatchSPCAtchison, Doniphan, Johnson, Leavenworth, Linn, Miami and 1 more8 hr
May 2, 1:33 PM CDTMesoscale DiscussionSPCClark117 min
May 2, 3:56 PM CDTSevere Thunderstorm WatchSPCClark, Scotland9 hr

Nearby

Tornado Watches in Kansas, 2018Every tornado watch in 2018

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.