Alert archive / Kansas / Tornado Watches in 2018

Tornado Watch 59

May 1, 20184 counties in Iowa; 42 counties in Kansas; 35 counties in Nebraska

The Storm Prediction Center issued this tornado watch at May 1, 2018, 2:47 PM CDT for 4 counties in Iowa; 42 counties in Kansas; 35 counties in Nebraska. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
May 1, 2018, 2:47 PM CDT (19:47 UTC)
Expired
May 2, 2018, 12:00 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3.5 in
Strongest gust expected
65 kt
All 81 counties

Harrison County, IA, Monona County, IA, Pottawattamie County, IA, Shelby County, IA, Barber County, KS, Barton County, KS, Clark County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Ford County, KS, Geary County, KS, Harper County, KS, Harvey County, KS, Hodgeman County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Nemaha County, KS, Ness County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Smith County, KS, Stafford County, KS, Washington County, KS, Adams County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 159 km from the middle of the area, began a volume at 19:49 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
50%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
90%
One or more hailstones of 2 inches or more
80%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 1, 2:53 PM CDTSevere Thunderstorm WarningDDCEllis, Trego52 min
May 1, 3:13 PM CDTSevere Thunderstorm WarningGIDPhillips, Smith47 min
May 1, 3:20 PM CDTSevere Thunderstorm WarningGIDOsborne, Rooks40 min
May 1, 3:28 PM CDTSevere Thunderstorm WarningGIDAdams, Webster47 min
May 1, 3:31 PM CDTSevere Thunderstorm WarningDDCEllis44 min
May 1, 3:47 PM CDTSevere Thunderstorm WarningOAXColfax, Cuming, Dodge, Platte, Stanton43 min
May 1, 3:49 PM CDTSevere Thunderstorm WarningGIDPolk, York26 min
May 1, 3:51 PM CDTSevere Thunderstorm WarningGIDOsborne, Rooks39 min
May 1, 3:51 PM CDTSevere Thunderstorm WarningGIDJewell, Smith39 min
May 1, 3:55 PM CDTSevere Thunderstorm WarningDDCHodgeman, Ness, Pawnee, Rush50 min
May 1, 3:58 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte32 min
May 1, 4:01 PM CDTSevere Thunderstorm WarningGIDAdams, Franklin, Kearney, Webster44 min
May 1, 4:02 PM CDTSevere Thunderstorm WarningICTRussell28 min
May 1, 4:05 PM CDTTornado WarningGIDJewell, Smith25 min
May 1, 4:09 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Nuckolls, Webster51 min
May 1, 4:11 PM CDTTornado WarningDDCNess, Pawnee, Rush49 min
May 1, 4:13 PM CDTSevere Thunderstorm WarningDDCEllis17 min
May 1, 4:19 PM CDTSevere Thunderstorm WarningGIDOsborne, Rooks41 min
May 1, 4:19 PM CDTSevere Thunderstorm WarningOAXColfax, Dodge29 min
May 1, 4:21 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Hall, Hamilton39 min
May 1, 4:23 PM CDTSevere Thunderstorm WarningGIDJewell, Smith37 min
May 1, 4:27 PM CDTTornado WarningGIDJewell, Smith33 min
May 1, 4:27 PM CDTSevere Thunderstorm WarningOAXButler, Colfax33 min
May 1, 4:28 PM CDTSevere Thunderstorm WarningICTRussell32 min
May 1, 4:31 PM CDTSevere Thunderstorm WarningGIDHamilton, Merrick, Polk, York44 min
May 1, 4:38 PM CDTSevere Thunderstorm WarningDDCEdwards, Ford, Kiowa35 min
May 1, 4:38 PM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Dodge52 min
May 1, 4:39 PM CDTSevere Thunderstorm WarningGIDAdams, Webster41 min
May 1, 4:39 PM CDTTornado Warning Tornado observedGIDHamilton, York36 min
May 1, 4:40 PM CDTSevere Thunderstorm WarningDDCEllis24 min
May 1, 4:47 PM CDTSevere Thunderstorm WarningGIDClay, Fillmore43 min
May 1, 4:51 PM CDTSevere Thunderstorm WarningGIDHall, Hamilton, Merrick24 min
May 1, 4:53 PM CDTSevere Thunderstorm WarningGIDJewell, Smith52 min
May 1, 4:54 PM CDTTornado WarningGIDHall16 min
May 1, 4:55 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Dodge, Saunders50 min
May 1, 4:57 PM CDTTornado WarningGIDAdams23 min
May 1, 4:57 PM CDTTornado WarningGIDAdams33 min
May 1, 4:58 PM CDTSevere Thunderstorm WarningICTRussell32 min
May 1, 4:59 PM CDTSevere Thunderstorm WarningDDCRush16 min
May 1, 4:59 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne46 min
May 1, 5:00 PM CDTTornado WarningGIDJewell19 min
May 1, 5:00 PM CDTSevere Thunderstorm WarningICTBarton, Russell60 min
May 1, 5:01 PM CDTTornado WarningOAXButler, Saunders29 min
May 1, 5:02 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte43 min
May 1, 5:04 PM CDTSevere Thunderstorm WarningTOPRepublic41 min
May 1, 5:08 PM CDTSevere Thunderstorm WarningGIDJewell37 min
May 1, 5:09 PM CDTSevere Thunderstorm WarningGIDHamilton, Merrick, Polk, York51 min
May 1, 5:10 PM CDTSevere Thunderstorm WarningDDCEdwards, Pawnee, Rush30 min
May 1, 5:12 PM CDTSevere Thunderstorm WarningDDCEdwards, Kiowa48 min
May 1, 5:14 PM CDTSevere Thunderstorm WarningDDCEllis, Rush46 min
May 1, 5:16 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Hall, Hamilton, Merrick44 min
May 1, 5:22 PM CDTSevere Thunderstorm WarningGIDClay, Fillmore, York38 min
May 1, 5:25 PM CDTSevere Thunderstorm WarningGIDNuckolls, Thayer50 min
May 1, 5:27 PM CDTSevere Thunderstorm WarningOAXBurt, Dodge, Washington48 min
May 1, 5:29 PM CDTTornado WarningDDCEdwards27 min
May 1, 5:32 PM CDTSevere Thunderstorm WarningICTLincoln28 min
May 1, 5:36 PM CDTTornado WarningICTBarton, Russell39 min
May 1, 5:38 PM CDTTornado WarningOAXBurt, Washington17 min
May 1, 5:40 PM CDTTornado WarningGIDNuckolls, Thayer35 min
May 1, 5:40 PM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte50 min
May 1, 5:42 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne48 min
May 1, 5:42 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders48 min
May 1, 5:43 PM CDTSevere Thunderstorm WarningTOPRepublic47 min
May 1, 5:44 PM CDTSevere Thunderstorm WarningGIDHamilton, Merrick, Polk, York21 min
May 1, 5:50 PM CDTSevere Thunderstorm WarningOAXWashington40 min
May 1, 5:53 PM CDTSevere Thunderstorm WarningDDCEdwards, Pawnee, Stafford28 min
May 1, 5:54 PM CDTSevere Thunderstorm WarningICTBarton10 min
May 1, 5:54 PM CDTSevere Thunderstorm WarningGIDPolk36 min
May 1, 5:57 PM CDTTornado Warning Tornado observedGIDThayer33 min
May 1, 5:58 PM CDTTornado WarningGIDMitchell32 min
May 1, 5:58 PM CDTTornado Warning Tornado observedTOPRepublic17 min
May 1, 6:00 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa45 min
May 1, 6:06 PM CDTTornado Warning Tornado observedOAXJefferson24 min
May 1, 6:07 PM CDTTornado WarningGIDMitchell38 min
May 1, 6:08 PM CDTSevere Thunderstorm WarningOAXHarrison, Monona52 min
May 1, 6:08 PM CDTSevere Thunderstorm WarningTOPRepublic, Washington52 min
May 1, 6:09 PM CDTTornado WarningICTEllsworth, Lincoln51 min
May 1, 6:10 PM CDTTornado Warning Tornado observedTOPCloud, Ottawa50 min
May 1, 6:11 PM CDTSevere Thunderstorm WarningDDCClark, Comanche, Kiowa49 min
May 1, 6:13 PM CDTSevere Thunderstorm WarningICTBarton, Russell48 min
May 1, 6:20 PM CDTSevere Thunderstorm WarningGIDThayer25 min
May 1, 6:21 PM CDTSevere Thunderstorm WarningDDCStafford24 min
May 1, 6:21 PM CDTSevere Thunderstorm WarningOAXBurt, Dodge, Washington17 min
May 1, 6:26 PM CDTSevere Thunderstorm WarningICTBarton, Russell30 min
May 1, 6:28 PM CDTSevere Thunderstorm WarningGIDMitchell47 min
May 1, 6:28 PM CDTSevere Thunderstorm WarningOAXButler32 min
May 1, 6:28 PM CDTTornado WarningOAXJefferson32 min
May 1, 6:30 PM CDTTornado WarningGIDMitchell30 min
May 1, 6:36 PM CDTTornado WarningDDCComanche24 min
May 1, 6:37 PM CDTSevere Thunderstorm WarningICTLincoln, Russell53 min
May 1, 6:52 PM CDTSevere Thunderstorm WarningDDCBarber, Comanche38 min
May 1, 6:53 PM CDTTornado WarningTOPCloud37 min
May 1, 6:56 PM CDTTornado WarningICTEllsworth, Lincoln48 min
May 1, 6:56 PM CDTTornado WarningOAXGage, Jefferson34 min
May 1, 6:58 PM CDTFlash Flood WarningOAXHarrison, Monona2 hr
May 1, 6:59 PM CDTSevere Thunderstorm WarningTOPMarshall, Washington13 min
May 1, 7:00 PM CDTSevere Thunderstorm WarningTOPCloud30 min
May 1, 7:07 PM CDTSevere Thunderstorm WarningICTReno, Rice39 min
May 1, 7:22 PM CDTTornado WarningOAXGage23 min
May 1, 7:24 PM CDTTornado Warning Tornado observedTOPClay, Cloud, Republic, Washington36 min
May 1, 7:25 PM CDTTornado WarningICTSaline20 min
May 1, 7:26 PM CDTSevere Thunderstorm WarningDDCBarber, Comanche44 min
May 1, 7:26 PM CDTTornado WarningTOPOttawa34 min
May 1, 7:28 PM CDTSevere Thunderstorm WarningICTLincoln, Russell62 min
May 1, 7:34 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne41 min
May 1, 7:42 PM CDTTornado WarningOAXGage, Pawnee33 min
May 1, 7:52 PM CDTTornado WarningTOPClay, Riley, Washington38 min
May 1, 7:54 PM CDTTornado Warning Tornado observedConsiderable damage threatTOPOttawa36 min
May 1, 8:01 PM CDTTornado Warning Considerable damage threatTOPClay, Riley, Washington34 min
May 1, 8:04 PM CDTTornado WarningOAXPawnee15 min
May 1, 8:09 PM CDTTornado WarningICTLincoln19 min
May 1, 8:12 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne48 min
May 1, 8:16 PM CDTSevere Thunderstorm WarningGIDMitchell29 min
May 1, 8:19 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa41 min
May 1, 8:23 PM CDTSevere Thunderstorm WarningICTLincoln, Russell67 min
May 1, 8:26 PM CDTTornado WarningTOPClay, Dickinson, Ottawa34 min
May 1, 8:26 PM CDTTornado WarningTOPCloud, Ottawa34 min
May 1, 8:29 PM CDTTornado WarningICTLincoln, Russell46 min
May 1, 8:33 PM CDTSevere Thunderstorm WarningTOPMarshall, Riley, Washington57 min
May 1, 8:45 PM CDTSevere Thunderstorm WarningGIDMitchell45 min
May 1, 8:52 PM CDTFlash Flood WarningGIDMitchell, Osborne4 hr
May 1, 8:56 PM CDTSevere Thunderstorm WarningGIDMitchell, Osborne49 min
May 1, 8:58 PM CDTTornado Warning Tornado observedTOPClay32 min
May 1, 9:00 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa45 min
May 1, 9:13 PM CDTSevere Thunderstorm WarningTOPClay, Dickinson47 min
May 1, 9:25 PM CDTTornado Warning Tornado observedTOPClay, Riley35 min
May 1, 9:27 PM CDTSevere Thunderstorm WarningTOPClay33 min
May 1, 9:29 PM CDTSevere Thunderstorm WarningGIDMitchell46 min
May 1, 9:41 PM CDTSevere Thunderstorm WarningTOPClay, Cloud, Ottawa34 min
May 1, 9:47 PM CDTSevere Thunderstorm WarningTOPClay, Geary, Pottawatomie, Riley43 min
May 1, 9:54 PM CDTTornado WarningTOPPottawatomie, Riley36 min
May 1, 10:11 PM CDTSevere Thunderstorm WarningTOPClay, Cloud, Ottawa34 min
May 1, 10:15 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley, Wabaunsee45 min
May 1, 10:24 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa36 min
May 1, 10:27 PM CDTTornado WarningTOPMarshall, Nemaha, Pottawatomie33 min
May 1, 10:40 PM CDTSevere Thunderstorm WarningTOPClay, Geary, Pottawatomie, Riley35 min
May 1, 11:08 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley37 min
May 1, 11:35 PM CDTSevere Thunderstorm WarningTOPJackson, Pottawatomie25 min
May 1, 11:49 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley26 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, 7.8 hours before the alert went out and 181 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 2018-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1353 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 2018-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 376 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
1353 J/kg
Mixed-layer CIN
-253 J/kg
Mixed-layer LCL
970 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
376 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

835 
WWUS20 KWNS 011945
SEL9  
SPC WW 011945
IAZ000-KSZ000-NEZ000-020300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 59
NWS Storm Prediction Center Norman OK
245 PM CDT Tue May 1 2018

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Far southwest Iowa
  Central Kansas
  Southeast Nebraska

* Effective this Tuesday afternoon and evening from 245 PM until
  1000 PM CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Widespread large hail and scattered very large hail events to
    3.5 inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible

SUMMARY...Several severe storms are expected to develop along the
dryline and quasi-stationary front through this evening. Tornadoes,
very large hail, and damaging winds are anticipated.

The tornado watch area is approximately along and 70 statute miles
east and west of a line from 40 miles southwest of Medicine Lodge KS
to 30 miles west northwest of Tekamah NE. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU9).

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 3.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 23035.

...Grams

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 1, 10:24 AM CDTMesoscale DiscussionSPCAppanoose, Clarke, Decatur, Jasper, Lucas, Madison and 10 more3 hr
May 1, 3:16 PM CDTMesoscale DiscussionSPCAudubon, Black Hawk, Boone, Bremer, Buena Vista, Butler and 24 more89 min
May 1, 5:00 PM CDTMesoscale DiscussionSPCCass, Fremont, Mills, Montgomery, Page, Pottawattamie2 hr
May 1, 5:47 PM CDTSevere Thunderstorm WatchSPCAdair, Allamakee, Audubon, Benton, Black Hawk, Boone and 44 more6 hr
Apr 30, 7:39 PM CDTMesoscale DiscussionSPCClark, Finney, Ford, Gove, Gray, Hodgeman and 3 more2 hr
May 1, 1:10 PM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Dickinson, Edwards, Ellis and 23 more3 hr
Apr 30, 8:13 PM CDTMesoscale DiscussionSPCAntelope, Boone, Cedar, Custer, Garfield, Greeley and 10 more92 min
May 1, 2:01 PM CDTMesoscale DiscussionSPCCheyenne, Kimball119 min

Nearby

Tornado Watches in Kansas, 2018Tornado Watches in Nebraska, 2018Tornado Watches in Iowa, 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.