Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Kansas City, MO

May 27, 2021Leavenworth County, Wyandotte County, Kansas

NWS Kansas City, MO issued this special weather statement at May 27, 2021, 2:50 AM CDT for Leavenworth County, Wyandotte County, Kansas. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 27, 2021, 2:50 AM CDT (07:50 UTC)
Expired: May 27, 2021, 3:30 AM CDT
In force: 40 min
Issued by: NWS Kansas City, MO

Counties Leavenworth County, KS, Wyandotte County, KS

The radar

The Pleasant Hill radar (KEAX), 79 km from the middle of the area, began a volume at 07:53 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 7.8 hours before the alert went out and 50 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: 328 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 2025 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 27, 12:08 AM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, May 27, 12:08 AM CDT, 2 hours 42 minutes before

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Hazardous weather outlook, May 26, 2:50 PM CDT, 12 hours before

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In the hours before

Special weather statement, May 27, 2:50 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
250 AM CDT Thu May 27 2021

KSZ025-103>105-MOZ020-028-270830-
Johnson KS-Wyandotte KS-Atchison KS-Leavenworth KS-Platte MO-
Buchanan MO-
250 AM CDT Thu May 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR WYANDOTTE...LEAVENWORTH...
NORTHERN JOHNSON...SOUTHEASTERN ATCHISON...SOUTHWESTERN BUCHANAN AND
CENTRAL PLATTE COUNTIES UNTIL 330 AM CDT...

At 250 AM CDT, Doppler radar was tracking a strong thunderstorm near
Clinton, or 11 miles southwest of Lawrence, moving northeast at 25
mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Overland Park, Olathe, Shawnee, Lenexa, Leavenworth, Prairie Village,
Lansing, Atchison, Merriam, Bonner Springs, De Soto, Tonganoxie,
Basehor, Edwardsville, Weston, Lake Quivira, Kansas City, Linwood,
Rushville and Easton.

This includes the following highways...
 Interstate 70 in Kansas between mile markers 410 and 416.
 Interstate 35 in Kansas between mile markers 224 and 229.
 Interstate 435 between mile markers 2 and 19.
 Kansas Turnpike between mile markers 206 and 226.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northeastern and east central Kansas...and northwestern and west
central Missouri.

LAT...LON 3961 9501 3898 9465 3886 9505 3898 9506
      3899 9507 3898 9509 3896 9508 3898 9516
      3896 9517 3897 9519 3942 9518 3942 9533
TIME...MOT...LOC 0750Z 232DEG 21KT 3887 9545

Leighton

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	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, 6:28 AM CDT	Special Weather Statement	EAX	Platte	32 min
May 27, 6:51 AM CDT	Special Weather Statement	EAX	Jackson	39 min
May 27, 7:51 AM CDT	Areal Flood Advisory	EAX	Bates, Cass	71 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	Bates, Cass	3 hr
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, 10:50 AM CDT	Flash Flood Watch	EAX	Bates, Cass, Henry, Johnson, Pettis	8 hr
May 27, 11:23 AM CDT	River Flood Warning	EAX	Bates	4 days
May 27, 11:46 AM CDT	Areal Flood Warning	EAX	Henry, Johnson, Pettis	9 hr
May 27, 11:46 AM CDT	Areal Flood Warning	EAX	Bates, Cass	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, 4:51 PM CDT	Areal Flood Advisory	EAX	Clay, Jackson, Platte	3 hr
May 27, 5:05 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Ray	25 min
May 27, 5:40 PM CDT	Severe Thunderstorm Warning	EAX	Platte	35 min
May 27, 5:55 PM CDT	Flash Flood Warning	EAX	Clay, Jackson, Platte	3 hr
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
May 27, 1:20 AM CDT	River Flood Warning	EAX	Atchison, Leavenworth	7 hr
May 27, 6:19 AM CDT	Special Weather Statement	EAX	Johnson, Miami	41 min
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, 4:08 PM CDT	Special Weather Statement	EAX	Wyandotte	37 min
May 27, 5:14 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	31 min

Nearby

Special Weather Statements in Kansas, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.