Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Kansas City, MO

May 2, 20186 counties in Missouri; Linn County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at May 2, 2018, 9:22 PM CDT for 6 counties in Missouri; Linn County, Kansas. It was in force for 38 min. 5 reports 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: May 2, 2018, 9:22 PM CDT (02:22 UTC)
Expired: May 2, 2018, 10:00 PM CDT
In force: 38 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Linn County, KS, Bates County, MO, Cass County, MO, Henry County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO

The radar

The Pleasant Hill radar (KEAX), 41 km from the middle of the area, began a volume at 02:26 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
May 2, 9:23 PM CDT	TSTM WND DMG	2 Ne Grandview, MO	DELAYED REPORT FROM SOCIAL MEDIA. LARGE TREE DOWN ON VEHICLE. TIME MATCHED TO RADAR.
May 2, 9:23 PM CDT	TSTM WND DMG	Belton, MO	DELAYED REPORT. MULTIPLE LARGE TREES DOWN IN BELTON. TIME MATCHED TO RADAR.
May 2, 9:25 PM CDT	TSTM WND DMG	Grandview, MO	SIGNS DOWN AND TREE DAMAGE AT THE MCDONALDS NEAR HARRY S TRUMAN ROAD
May 2, 9:28 PM CDT	TSTM WND DMG	Raytown, MO	DELAYED REPORT. 8 INCH TREE DOWN ON VEHICLE. TIME MATCHED TO RADAR.
May 2, 9:43 PM CDT	TSTM WND GST 70	Pleasant Hill, MO	ESTIMATED 60 TO 70

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
May 2, 5:27 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.4 hours before the alert went out and 176 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: 1170 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted.

148 
WUUS53 KEAX 030222
SVREAX
KSC107-MOC013-037-083-095-101-107-030300-
/O.NEW.KEAX.SV.W.0021.180503T0222Z-180503T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
922 PM CDT WED MAY 2 2018

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southeastern Linn County in east central Kansas...
  Cass County in west central Missouri...
  Western Henry County in west central Missouri...
  Bates County in west central Missouri...
  Southwestern Lafayette County in west central Missouri...
  Jackson County in west central Missouri...
  Western Johnson County in west central Missouri...

* Until 1000 PM CDT.

* At 921 PM CDT, severe thunderstorms were located along a line
  extending from near Raytown to 8 miles southeast of Drexel to near 
  Prescott, moving east at 55 mph. This is a dangerous line of 
  storms with potential for embedded tornadoes and 70 mph winds.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Kansas City, Independence, Lee's Summit, Blue Springs, Leawood,
  Raytown, Grandview, Belton, Prairie Village, Raymore, Grain Valley,
  Harrisonville, Clinton, Pleasant Hill, Oak Grove, Odessa,
  Greenwood, Lexington, Peculiar and Butler.

This includes the following highways...
 Interstate 70 in Missouri between mile markers 6 and 48.
 Interstate 470 between mile markers 0 and 16.
 Interstate 435 between mile markers 61 and 75.

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 100 AM CDT for northeastern
and east central Kansas...and west central Missouri.

LAT...LON 3805 9425 3806 9454 3804 9486 3835 9462
      3906 9461 3916 9399 3914 9396 3917 9394
      3920 9375 3839 9378 3821 9390 3821 9405
      3803 9406 3806 9413 3803 9423
TIME...MOT...LOC 0221Z 265DEG 49KT 3904 9453 3837 9454 3810 9473 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

CDB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:03 PM CDT	Tornado Warning	EAX	Atchison, Holt	16 min
May 2, 7:27 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Atchison, Buchanan, Holt, Nodaway, Platte	48 min
May 2, 7:30 PM CDT	Tornado Warning	EAX	Atchison, Nodaway	15 min
May 2, 8:04 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Clinton, DeKalb, Gentry, Nodaway and 2 more	41 min
May 2, 9:06 PM CDT	Tornado Warning	EAX	Bates, Cass	24 min
May 2, 9:09 PM CDT	Tornado Warning	EAX	Cass, Jackson	36 min
May 2, 9:28 PM CDT	Tornado Warning	EAX	Jackson, Lafayette	32 min
May 2, 9:44 PM CDT	Tornado Warning	EAX	Carroll, Cass, Jackson, Johnson, Lafayette, Ray	46 min
May 2, 9:49 PM CDT	Tornado Warning	EAX	Bates, Cass, Henry, Johnson	41 min
May 2, 9:57 PM CDT	Severe Thunderstorm Warning	EAX	Bates, Carroll, Cass, Henry, Johnson, Lafayette and 1 more	63 min
May 2, 10:22 PM CDT	Tornado Warning	EAX	Johnson, Lafayette, Pettis, Saline	23 min
May 2, 10:39 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Henry, Johnson, Pettis, Saline	66 min
May 2, 10:47 PM CDT	Severe Thunderstorm Warning	EAX	Macon, Randolph	28 min
May 2, 11:07 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Putnam, Schuyler, Sullivan	28 min
May 3, 4:09 PM CDT	Special Weather Statement	EAX	Atchison	21 min
May 2, 8:26 PM CDT	Special Weather Statement	EAX	Johnson, Linn, Miami	34 min
May 2, 8:35 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Linn, Miami	55 min
May 2, 8:46 PM CDT	Tornado Warning	EAX	Johnson, Miami	29 min
May 3, 6:38 PM CDT	Special Weather Statement	EAX	Doniphan	52 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.