Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS Kansas City, MO

April 13, 20185 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 13, 2018, 7:12 PM CDT for 5 counties in Missouri. It was in force for 48 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: Apr 13, 2018, 7:12 PM CDT (00:12 UTC)
Expired: Apr 13, 2018, 8:00 PM CDT
In force: 48 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caldwell County, MO, Carroll County, MO, Clay County, MO, Livingston County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 90 km from the middle of the area, began a volume at 00:12 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
Apr 13, 7:35 PM CDT	HAIL 0.5	Polo, MO

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 13, 2:19 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 0.2 hours before the alert went out and 162 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: 15 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 2012 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

447 
WUUS53 KEAX 140012
SVREAX
MOC025-033-047-117-177-140100-
/O.NEW.KEAX.SV.W.0013.180414T0012Z-180414T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
712 PM CDT FRI APR 13 2018

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northeastern Clay County in west central Missouri...
  Northern Ray County in west central Missouri...
  Northwestern Carroll County in north central Missouri...
  Eastern Caldwell County in north central Missouri...
  Southwestern Livingston County in north central Missouri...

* Until 800 PM CDT.

* At 712 PM CDT, a severe thunderstorm was located over Excelsior
  Estates, or near Lawson, moving northeast at 40 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...
  Excelsior Springs, Lawson, Braymer, Polo, Crystal Lakes, Kingston,
  Cowgill, Excelsior Estates, Woods Heights, Rayville, Homestead,
  Elmira and Knoxville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

A Tornado Watch remains in effect until 900 PM CDT for north central,
northwestern and west central Missouri.

LAT...LON 3972 9374 3948 9365 3929 9423 3945 9423
      3979 9388
TIME...MOT...LOC 0012Z 224DEG 34KT 3940 9417 

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

Kurtz

4 follow-up statements

038 
WWUS53 KEAX 140017
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
717 PM CDT FRI APR 13 2018

MOC047-140027-
/O.CAN.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Clay MO-
717 PM CDT FRI APR 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLAY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM CDT for north central,
northwestern and west central Missouri.

LAT...LON 3972 9374 3949 9366 3931 9417 3942 9422
      3947 9421 3979 9388
TIME...MOT...LOC 0017Z 218DEG 37KT 3944 9412 

$$

MOC025-033-117-177-140100-
/O.CON.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Ray MO-Carroll MO-Caldwell MO-Livingston MO-
717 PM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHERN RAY...NORTHWESTERN CARROLL...EASTERN CALDWELL AND
SOUTHWESTERN LIVINGSTON COUNTIES...

At 717 PM CDT, a severe thunderstorm was located near Lawson, moving
northeast at 45 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Lawson, Braymer, Polo, Crystal Lakes, Kingston, Cowgill, Excelsior
Estates, Woods Heights, Rayville, Elmira and Knoxville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

A Tornado Watch remains in effect until 900 PM CDT for north central,
northwestern and west central Missouri.

LAT...LON 3972 9374 3949 9366 3931 9417 3942 9422
      3947 9421 3979 9388
TIME...MOT...LOC 0017Z 218DEG 37KT 3944 9412 

HAIL...2.00IN
WIND...60MPH
 
$$

Kurtz

481 
WWUS53 KEAX 140026
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
726 PM CDT FRI APR 13 2018

MOC025-033-117-177-140100-
/O.CON.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Ray MO-Carroll MO-Caldwell MO-Livingston MO-
726 PM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHERN RAY...NORTHWESTERN CARROLL...EASTERN CALDWELL AND
SOUTHWESTERN LIVINGSTON COUNTIES...

At 726 PM CDT, a severe thunderstorm was located near Polo, or 7
miles east of Lawson, moving northeast at 35 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Braymer, Polo, Cowgill and Knoxville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A Tornado Watch remains in effect until 900 PM CDT for north central
and west central Missouri.

LAT...LON 3952 9367 3937 9412 3944 9417 3953 9414
      3979 9388 3972 9374
TIME...MOT...LOC 0026Z 222DEG 30KT 3948 9407 

HAIL...2.00IN
WIND...60MPH
 
$$

Kurtz

824 
WWUS53 KEAX 140046
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
746 PM CDT FRI APR 13 2018

MOC033-177-140056-
/O.CAN.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Ray MO-Carroll MO-
746 PM CDT FRI APR 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN RAY AND NORTHWESTERN
CARROLL COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been 
cancelled.

A Tornado Watch remains in effect until 900 PM CDT for north central
and west central Missouri.

LAT...LON 3972 9374 3961 9370 3961 9375 3958 9376
      3952 9393 3953 9402 3961 9404 3979 9388
      3978 9387
TIME...MOT...LOC 0046Z 219DEG 39KT 3961 9394 

$$

MOC025-117-140100-
/O.CON.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Caldwell MO-Livingston MO-
746 PM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR EASTERN CALDWELL AND SOUTHWESTERN LIVINGSTON COUNTIES...

At 746 PM CDT, a severe thunderstorm was located near Cowgill, or 9
miles south of Hamilton, moving northeast at 45 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...
Braymer and Cowgill. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A Tornado Watch remains in effect until 900 PM CDT for north central
and west central Missouri.

LAT...LON 3972 9374 3961 9370 3961 9375 3958 9376
      3952 9393 3953 9402 3961 9404 3979 9388
      3978 9387
TIME...MOT...LOC 0046Z 219DEG 39KT 3961 9394 

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

Kurtz

655 
WWUS53 KEAX 140057
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
757 PM CDT FRI APR 13 2018

MOC025-117-140107-
/O.EXP.KEAX.SV.W.0013.000000T0000Z-180414T0100Z/
Caldwell MO-Livingston MO-
757 PM CDT FRI APR 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CALDWELL AND
SOUTHWESTERN LIVINGSTON COUNTIES WILL EXPIRE AT 800 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 900 PM CDT for north central
and west central Missouri.

LAT...LON 3972 9374 3961 9370 3961 9375 3958 9376
      3952 9393 3953 9402 3961 9404 3979 9388
      3978 9387
TIME...MOT...LOC 0057Z 224DEG 34KT 3968 9385 

$$

Kurtz

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 7:05 PM CDT	Special Weather Statement	EAX	Clay	40 min
Apr 13, 7:09 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Platte	36 min
Apr 13, 7:21 PM CDT	Special Weather Statement	EAX	Nodaway	39 min
Apr 13, 7:21 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Jackson, Platte	39 min
Apr 13, 7:54 PM CDT	Severe Thunderstorm Warning	EAX	Platte	36 min
Apr 13, 7:55 PM CDT	Special Weather Statement	EAX	Clay	35 min
Apr 13, 7:57 PM CDT	Special Weather Statement	EAX	Caldwell, Livingston	33 min
Apr 13, 8:24 PM CDT	Special Weather Statement	EAX	Buchanan, Clinton, Platte	51 min
Apr 13, 8:25 PM CDT	Special Weather Statement	EAX	Caldwell	50 min
Apr 13, 8:28 PM CDT	Special Weather Statement	EAX	Livingston	47 min
Apr 13, 8:54 PM CDT	Special Weather Statement	EAX	Jackson	51 min
Apr 13, 9:03 PM CDT	Special Weather Statement	EAX	Clinton, Daviess, DeKalb	42 min
Apr 13, 9:38 PM CDT	Special Weather Statement	EAX	Harrison	52 min
Apr 13, 9:45 PM CDT	Special Weather Statement	EAX	Daviess	45 min
Apr 13, 9:58 PM CDT	Special Weather Statement	EAX	Harrison	32 min
Apr 14, 3:11 AM CDT	Freeze Warning	EAX	Bates, Cass, Clay, Henry, Jackson, Johnson and 2 more	30 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 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.