Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Kansas City, MO

May 27, 2021Leavenworth County, Wyandotte County, Kansas; Platte County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at May 27, 2021, 5:40 PM CDT for Leavenworth County, Wyandotte County, Kansas; Platte County, Missouri. It was in force for 35 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 27, 2021, 5:40 PM CDT (22:40 UTC)
Expired: May 27, 2021, 6:15 PM CDT
In force: 35 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 2.0 in
Wind: 70.0 mph

Counties Leavenworth County, KS, Wyandotte County, KS, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 59 km from the middle of the area, began a volume at 22:40 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 27, 5:50 PM CDT	HAIL 1	1 E Piper, KS	REPORT FROM MPING: QUARTER (1.00 IN.).
May 27, 5:52 PM CDT	HAIL 1	2 Se Fairmount, KS	REPORT FROM MPING: QUARTER (1.00 IN.).
May 27, 5:52 PM CDT	HAIL 1.5	1 Nnw Maywood, KS
May 27, 5:56 PM CDT	HAIL 1	1 W Maywood, KS	1 INCH HAIL REPORTED ON SOCIAL MEDIA, A PICTURE VERIFYING MEASUREMENT WAS PROVIDED. LOCATION WAS NEAR LEGENDS NEAR KC SPEEDWAY.
May 27, 6:18 PM CDT	HAIL 0.88	1 W Parkville, MO

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

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.7 hours before the alert went out and 74 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: 3 J/kg
Mixed-layer CIN: -459 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

274 
WUUS53 KEAX 272240
SVREAX
KSC103-209-MOC165-272315-
/O.NEW.KEAX.SV.W.0018.210527T2240Z-210527T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
540 PM CDT Thu May 27 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Wyandotte County in northeastern Kansas...
  Central Leavenworth County in northeastern Kansas...
  Southeastern Platte County in west central Missouri...

* Until 615 PM CDT.

* At 540 PM CDT, a severe thunderstorm was located over Basehor,
  moving east at 20 mph.

  HAZARD...Two inch hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* This severe thunderstorm will be near...
  Edwardsville and Kansas City around 555 PM CDT.

Other locations in the path of this severe thunderstorm include
Kansas City, Parkville, Riverside, Weatherby Lake, Lake Waukomis and
Platte Woods.

This includes the following highways...
 Interstate 70 in Kansas between mile markers 410 and 421.
 Interstate 29 between mile markers 5 and 7.
 Interstate 635 between mile markers 3 and 10.
 Interstate 435 between mile markers 9 and 26.
 Kansas Turnpike between mile markers 220 and 226.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3930 9474 3922 9463 3909 9463 3905 9477
      3906 9484 3906 9487 3904 9495 3918 9501
TIME...MOT...LOC 2240Z 248DEG 19KT 3911 9491 

HAIL...2.00IN
WIND...70MPH
 
$$

Blair

2 follow-up statements

211 
WWUS53 KEAX 272254
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
554 PM CDT Thu May 27 2021

KSC103-209-MOC165-272315-
/O.CON.KEAX.SV.W.0018.000000T0000Z-210527T2315Z/
Wyandotte KS-Leavenworth KS-Platte MO-
554 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR WYANDOTTE...EAST CENTRAL LEAVENWORTH AND SOUTHEASTERN PLATTE
COUNTIES...

At 554 PM CDT, a severe thunderstorm was located near Kansas City, or
near Edwardsville, moving east at 20 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

This severe storm will be near...
  Kansas City around 600 PM CDT.

Other locations in the path of this severe thunderstorm include
Kansas City, Parkville, Weatherby Lake, Riverside, Lake Waukomis and
Platte Woods.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3929 9473 3922 9463 3909 9463 3906 9488
      3920 9492
TIME...MOT...LOC 2254Z 248DEG 19KT 3914 9482 

HAIL...1.25IN
WIND...60MPH
 
$$

Blair

794 
WWUS53 KEAX 272304
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
604 PM CDT Thu May 27 2021

KSC103-272313-
/O.CAN.KEAX.SV.W.0018.000000T0000Z-210527T2315Z/
Leavenworth KS-
604 PM CDT Thu May 27 2021

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

LAT...LON 3920 9480 3920 9478 3922 9480 3927 9470
      3922 9463 3911 9463 3909 9482 3919 9484
TIME...MOT...LOC 2303Z 247DEG 20KT 3917 9473 

$$

KSC209-MOC165-272315-
/O.CON.KEAX.SV.W.0018.000000T0000Z-210527T2315Z/
Wyandotte KS-Platte MO-
604 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN WYANDOTTE AND SOUTHEASTERN PLATTE COUNTIES...

At 603 PM CDT, a severe thunderstorm was located over Parkville,
moving east at 25 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...
  Kansas City, Parkville, Weatherby Lake, Riverside, Lake Waukomis 
  and Platte Woods.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3920 9480 3920 9478 3922 9480 3927 9470
      3922 9463 3911 9463 3909 9482 3919 9484
TIME...MOT...LOC 2303Z 247DEG 20KT 3917 9473 

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

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 1:20 AM CDT	River Flood Warning	EAX	Atchison, Leavenworth	7 hr
May 27, 2:50 AM CDT	Special Weather Statement	EAX	Leavenworth, Wyandotte	40 min
May 27, 6:19 AM CDT	Special Weather Statement	EAX	Johnson, Miami	41 min
May 27, 6:28 AM CDT	Special Weather Statement	EAX	Leavenworth, Wyandotte	32 min
May 27, 7:51 AM CDT	Areal Flood Advisory	EAX	Miami	71 min
May 27, 9:02 AM CDT	Flash Flood Warning	EAX	Miami	3 hr
May 27, 9:49 AM CDT	River Flood Warning	EAX	Miami	3 days
May 27, 9:57 AM CDT	River Flood Warning	EAX	Linn	4 days
May 27, 10:50 AM CDT	Flash Flood Watch	EAX	Linn, Miami	8 hr
May 27, 11:23 AM CDT	River Flood Warning	EAX	Linn	4 days
May 27, 11:46 AM CDT	Areal Flood Warning	EAX	Linn, Miami	9 hr
May 27, 4:08 PM CDT	Special Weather Statement	EAX	Wyandotte	37 min
May 27, 4:51 PM CDT	Areal Flood Advisory	EAX	Johnson, Leavenworth, Wyandotte	3 hr
May 27, 5:14 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	31 min
May 27, 5:55 PM CDT	Flash Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	3 hr
May 27, 1:20 AM CDT	River Flood Warning	EAX	Carroll	32 hr
May 27, 1:20 AM CDT	River Flood Warning	EAX	Cooper, Saline	55 hr
May 27, 1:20 AM CDT	River Flood Warning	EAX	Cass, Henry, Johnson	4 days
May 27, 1:20 AM CDT	River Flood Warning	EAX	Johnson, Pettis	39 hr
May 27, 3:15 AM CDT	Special Weather Statement	EAX	Andrew	45 min
May 27, 3:51 AM CDT	Special Weather Statement	EAX	Clay, Clinton	39 min
May 27, 4:05 AM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Clinton, Daviess, DeKalb	40 min
May 27, 4:26 AM CDT	Special Weather Statement	EAX	Caldwell, Carroll	49 min
May 27, 4:50 AM CDT	Special Weather Statement	EAX	Henry	40 min
May 27, 5:27 AM CDT	Special Weather Statement	EAX	Chariton, Linn, Macon, Sullivan	48 min
May 27, 5:37 AM CDT	Special Weather Statement	EAX	Pettis	38 min
May 27, 6:22 AM CDT	River Flood Warning	EAX	Clay, Ray	27 hr
May 27, 6:51 AM CDT	Special Weather Statement	EAX	Jackson	39 min
May 27, 8:31 AM CDT	Areal Flood Advisory	EAX	Henry, Johnson, Pettis	31 min
May 27, 9:02 AM CDT	Flash Flood Warning	EAX	Henry, Johnson, Pettis	3 hr
May 27, 9:35 AM CDT	River Flood Warning	EAX	Bates, Cass, Henry	56 hr
May 27, 11:46 AM CDT	Areal Flood Warning	EAX	Henry, Johnson, Pettis	9 hr
May 27, 12:25 PM CDT	River Flood Warning	EAX	Howard	8 hr
May 27, 12:25 PM CDT	River Flood Warning	EAX	Cooper	19 hr
May 27, 4:50 PM CDT	Special Weather Statement	EAX	Clay	40 min
May 27, 5:05 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Ray	25 min
May 27, 5:58 PM CDT	Flash Flood Warning	EAX	Clay, Ray	3 hr
May 27, 6:11 PM CDT	Special Weather Statement	EAX	Clay	34 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2021 Severe Thunderstorm Warnings in Missouri, 2021 Every severe thunderstorm warning in 2021

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.