Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 107, NWS Kansas City, MO

June 11, 20186 counties in Missouri; Wyandotte County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 2018, 10:44 PM CDT for 6 counties in Missouri; Wyandotte County, Kansas. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 11, 2018, 10:44 PM CDT (03:44 UTC)
Expired: Jun 11, 2018, 11:15 PM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Wyandotte County, KS, Caldwell County, MO, Carroll County, MO, Clay County, MO, Clinton County, MO, Platte County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 60 km from the middle of the area, began a volume at 03:47 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 was reported inside it

Time	Report	Where	Remark
Jun 11, 10:47 PM CDT	HAIL 1.75	Polo, MO	NICKEL TO GOLF BALL SIZED HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 3 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 11, 6:12 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 3.7 hours before the alert went out and 119 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3203 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1854 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 9.8

Open this sounding in Storm Lab

The text

As transmitted.

420 
WUUS53 KEAX 120344
SVREAX
KSC209-MOC025-033-047-049-165-177-120415-
/O.NEW.KEAX.SV.W.0107.180612T0344Z-180612T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
1044 PM CDT MON JUN 11 2018

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northeastern Wyandotte County in northeastern Kansas...
  Clay County in west central Missouri...
  Southern Clinton County in northwestern Missouri...
  Ray County in west central Missouri...
  West central Carroll County in north central Missouri...
  Southern Caldwell County in north central Missouri...
  Eastern Platte County in west central Missouri...

* Until 1115 PM CDT.

* At 1043 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles north of Breckenridge to near Gower, moving
  southeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Liberty, Gladstone, Excelsior Springs, Smithville, Kearney,
  Richmond, Parkville, Platte City, Riverside, Lawson, Plattsburg,
  Lathrop, Weatherby Lake, Claycomo, Kansas City, Pleasant Valley,
  Lake Waukomis, Trimble, Polo and Edgerton.

This includes the following highways...
 Interstate 35 in Missouri between mile markers 8 and 43.
 Interstate 29 between mile markers 0 and 18.
 Interstate 635 between mile markers 8 and 12.
 Interstate 435 between mile markers 20 and 53.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3948 9476 3969 9388 3934 9369 3923 9424
      3924 9429 3921 9432 3912 9478
TIME...MOT...LOC 0343Z 318DEG 21KT 3986 9383 3964 9456 

HAIL...1.00IN
WIND...60MPH
 
$$

Welsh

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 6:43 PM CDT, 4 hours 1 minute earlier.

Area forecast discussion, Jun 11, 6:43 PM CDT, 4 hours 1 minute before

AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
643 PM CDT Mon Jun 11 2018

.Discussion...
Issued at 324 PM CDT MON JUN 11 2018

Primary focus remains on severe weather potential for this evening.
At the surface, a warm front reinforced by clouds and light
precipitation this morning is evident in observations and visible
satellite imagery - stretching from just south of Kirksville
intersecting a cold front near Omaha. This cold front has made
gradual eastward progress, now stretching from eastern Nebraska to
near Russell Kansas. Agitated cumulus field has evolved along and
ahead of the cold front. The environment is characterized by
relatively modest vertical wind shear, but strong instability in
place. Robust convection is expected to develop by mid to late
afternoon across southeast Nebraska into far northeast Kansas.
Uncertainty with respect to thunderstorm coverage and timing exists
on the convective evolution as storm cold pools begin to consolidate
just before sunset. The most likely scenario is a forward
propagating line/cluster of storms quickly diving southeastward
through the forecast area this evening. In this case, a risk for
straight-line wind damage of wind gusts from 60-70 mph will exist
with this activity over northeast Kansas into northwest Missouri.
The time window for the greatest severe weather potential will be
from 7 to 11 PM. A less likely scenario will be for storms to
struggle to develop a cohesive cold pool, and likewise new
convection favoring the southwest flank of activity, with
propagation along the instability axis. This would favor storms
more across eastern Kansas, with the forecast area being
essentially split. Regardless, the odds are more likely that a
cluster of storms will move through the forecast area, producing
the potential for wind damage. Folks should be weather-aware this
evening.

For the remainder of the week, thunderstorm chances will begin to
decrease. Tuesday should be mainly rain-free, with a slight chance
of convection on Wednesday as isentropic ascent occurs with the
surface warm front lifting northward. Thereafter, heights rise as an
upper level ridge builds through the central CONUS. This will spell
a low probability of rainfall and high temperatures returning into
the 90s Thursday into the weekend.

&&

.Aviation...(For the 00Z TAFS through 00Z Tuesday Evening)
Issued at 642 PM CDT MON JUN 11 2018

VFR conditions will start the evening, but a line of thunderstorms
is expected to blow through later tonight bringing some trouble to
the terminals. Current timing has the storms moving through
between 02Z and 05Z. These storms will likely result in a strong
winds from the northwest as they blow through along with heavy
rain. Otherwise, expect some marginal MVFR CIGs Tuesday morning
behind the cold front that moves through overnight.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
MO...NONE.
&&

Discussion...Blair
Aviation...Cutter

Hazardous weather outlook, Jun 11, 5:15 AM CDT, 17 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
515 AM CDT Mon Jun 11 2018

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-121015-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
515 AM CDT Mon Jun 11 2018

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 Hot conditions are expected today with highs in the low to mid 90s
 band heat index values in the mid 90 to low 100 degree range.

 Severe storms are possible west of Interstate 35 this evening into
 tonight. Damaging winds and large hail will be the main threats.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

 Thunderstorms will be possible again Wednesday night a few strong to
 isolated severe storms may be possible.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

In the hours before

Special weather statement, Jun 11, 9:34 PM CDT, 1 hour 10 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
934 PM CDT MON JUN 11 2018

MOZ004>006-013-014-120300-
Mercer MO-Daviess MO-De Kalb MO-Gentry MO-Harrison MO-
934 PM CDT MON JUN 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DAVIESS...EASTERN
GENTRY...WESTERN MERCER...HARRISON AND NORTHEASTERN DEKALB COUNTIES
UNTIL 1000 PM CDT...

At 934 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Lamoni to 6 miles southwest of Albany.
Movement was southeast at 35 mph.

Dime size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Bethany, Albany, Ridgeway, Gilman City, Pattonsburg, Eagleville, New
Hampton, Cainsville, Blythedale, Coffey, Mcfall, Mount Moriah, South
Lineville, Martinsville and Santa Rosa.

This includes Interstate 35 in Missouri between mile markers 73 and
113.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
north central and northwestern Missouri.

LAT...LON 4026 9371 4027 9376 4021 9376 3992 9422
      4026 9437 4039 9425 4039 9422 4042 9422
      4057 9407 4058 9351
TIME...MOT...LOC 0234Z 313DEG 42KT 4064 9401 4016 9439

Welsh

Local storm report, Jun 11, 9:50 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
950 PM CDT MON JUN 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0815 PM     TSTM WND GST     7 E TARKIO              40.44N 95.24W
06/11/2018  M76 MPH          ATCHISON           MO   LAW ENFORCEMENT

            MEASURED BY WIND TURBINE...TIME ESTIMATED
            BASED ON RADAR.

&&

LAFLIN

Special weather statement, Jun 11, 9:57 PM CDT, 47 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
957 PM CDT MON JUN 11 2018

MOZ005>007-013>015-022-120345-
Putnam MO-Grundy MO-Mercer MO-Daviess MO-De Kalb MO-Caldwell MO-
Harrison MO-
957 PM CDT MON JUN 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR DAVIESS...NORTHWESTERN GRUNDY...
NORTHWESTERN PUTNAM...MERCER...SOUTHEASTERN HARRISON...NORTHWESTERN
CALDWELL AND NORTHEASTERN DEKALB COUNTIES UNTIL 1045 PM CDT...

At 956 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles south of Leon to 7 miles northeast of
Maysville. Movement was southeast at 35 mph.

Dime size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Cameron, Trenton, Bethany, Gallatin, Princeton, Jamesport, Ridgeway,
Gilman City, Pattonsburg, Mercer, Cainsville, Spickard, Kidder,
Winston, Altamont, Coffey, Jameson, Weatherby, Mcfall and Mount
Moriah.

This includes Interstate 35 in Missouri between mile markers 55 and
95.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
north central and northwestern Missouri.

LAT...LON 4011 9359 3968 9420 4004 9427 4004 9422
      4011 9422 4058 9373 4058 9322
TIME...MOT...LOC 0256Z 300DEG 32KT 4060 9368 3998 9427

Welsh

Local storm report, Jun 11, 10:16 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1016 PM CDT MON JUN 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1005 PM     TSTM WND DMG     SAINT JOSEPH            39.77N 94.85W
06/11/2018                   BUCHANAN           MO   EMERGENCY MNGR

            LARGE TREE LIMB FELL ON FIRE TRUCK. THE LIMB
            WAS TOO LARGE FOR THEM TO MOVE WITHOUT
            EQUIPMENT. NO INJURIES TO THE CREW, MINOR
            DAMAGE TO THE FIRE TRUCK.

&&

JRB

Special weather statement, Jun 11, 10:27 PM CDT, 17 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1027 PM CDT MON JUN 11 2018

MOZ006-007-014>016-022>024-120415-
Putnam MO-Grundy MO-Mercer MO-Daviess MO-Livingston MO-Linn MO-
Caldwell MO-Sullivan MO-
1027 PM CDT MON JUN 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN DAVIESS...NORTHWESTERN
LINN...GRUNDY...PUTNAM...EASTERN MERCER...SULLIVAN...NORTHEASTERN
CALDWELL AND NORTHWESTERN LIVINGSTON COUNTIES UNTIL 1115 PM CDT...

At 1027 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles south of Corydon to near Gallatin.
Movement was southeast at 30 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Chillicothe, Trenton, Milan, Unionville, Gallatin, Jamesport,
Breckenridge, Utica, Browning, Spickard, Galt, Chula, Laredo,
Newtown, Ludlow, Humphreys, Mooresville, Pollock, Lucerne and
Tindall.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
north central Missouri.

LAT...LON 4005 9315 3963 9370 3986 9403 4013 9379
      4014 9376 4017 9376 4058 9340 4059 9276
TIME...MOT...LOC 0327Z 303DEG 40KT 4060 9331 3989 9393

Welsh

Local storm report, Jun 11, 10:34 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1034 PM CDT MON JUN 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1010 PM     HAIL             5 WSW HURON             39.61N 95.43W
06/11/2018  M1.00 INCH       ATCHISON           KS   STORM CHASER

            STORM SPOTTER REPORTED QUARTER SIZE HAIL AND
            50MPH WINDS.

&&

JRB

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:38 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	37 min
Jun 11, 8:14 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	46 min
Jun 11, 8:58 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Atchison, Gentry, Harrison, Holt, Nodaway and 1 more	32 min
Jun 11, 9:28 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, DeKalb, Gentry, Holt, Nodaway	32 min
Jun 11, 9:34 PM CDT	Special Weather Statement	EAX	Harrison	26 min
Jun 11, 9:51 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Clinton, Daviess, DeKalb, Gentry and 1 more	24 min
Jun 11, 9:57 PM CDT	Special Weather Statement	EAX	Daviess, Mercer	48 min
Jun 11, 10:10 PM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Caldwell, Clinton, Daviess, DeKalb, Platte	35 min
Jun 11, 10:12 PM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Platte	33 min
Jun 11, 10:27 PM CDT	Special Weather Statement	EAX	Grundy, Livingston, Putnam, Sullivan	48 min
Jun 11, 10:47 PM CDT	Severe Thunderstorm Warning	EAX	Platte	28 min
Jun 11, 10:51 PM CDT	Special Weather Statement	EAX	Carroll, Linn, Livingston	39 min
Jun 11, 11:03 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Clay, Jackson, Lafayette, Platte, Ray	27 min
Jun 11, 11:15 PM CDT	Severe Thunderstorm Warning	EAX	Platte	30 min
Jun 11, 11:25 PM CDT	Special Weather Statement	EAX	Carroll, Chariton, Linn	50 min
Jun 11, 11:30 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Clay, Jackson, Johnson, Lafayette, Ray	30 min
Jun 11, 11:45 PM CDT	Severe Thunderstorm Warning	EAX	Platte	30 min
Jun 12, 12:07 AM CDT	Special Weather Statement	EAX	Cass, Jackson, Johnson, Lafayette	23 min
Jun 12, 12:20 AM CDT	Special Weather Statement	EAX	Cass, Cooper, Henry, Johnson, Pettis	55 min
Jun 12, 12:42 AM CDT	Severe Thunderstorm Warning	EAX	Bates, Cass	33 min
Jun 12, 1:14 AM CDT	Special Weather Statement	EAX	Bates, Cass	61 min
Jun 12, 1:15 AM CDT	Special Weather Statement	EAX	Henry	30 min
Jun 12, 1:46 AM CDT	Severe Thunderstorm Warning	EAX	Bates	44 min
Jun 12, 12:12 AM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Miami, Wyandotte	33 min
Jun 12, 12:46 AM CDT	Special Weather Statement	EAX	Atchison	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Severe Thunderstorm Warnings in Kansas, 2018 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.