Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 85, NWS Kansas City, MO

July 10, 2021Atchison County, Leavenworth County, Kansas; 8 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 10, 2021, 2:28 AM CDT for Atchison County, Leavenworth County, Kansas; 8 counties in Missouri. It was in force for 47 min. 3 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: Jul 10, 2021, 2:28 AM CDT (07:28 UTC)
Expired: Jul 10, 2021, 3:15 AM CDT
In force: 47 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atchison County, KS, Leavenworth County, KS, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Platte County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 105 km from the middle of the area, began a volume at 07:30 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
Jul 10, 2:29 AM CDT	TSTM WND GST 60	Saint Joseph Airport, MO	CORRECTS PREVIOUS TSTM WND GST REPORT FROM SAINT JOSEPH AIRPORT.
Jul 10, 2:29 AM CDT	TSTM WND GST 60	Saint Joseph Airport, MO
Jul 10, 2:45 AM CDT	TSTM WND DMG	Gower, MO	TREES DOWNED, GARAGE DOOR BLOWN IN, CEDAR FENCE DAMAGED. TIME ESTIMATED FROM RADAR. REPORT FROM SOCIAL MEDIA.

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
Jul 9, 9:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 7.5 hours before the alert went out and 106 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: 2790 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1645 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

As transmitted.

757 
WUUS53 KEAX 100728
SVREAX
KSC005-103-MOC021-025-047-049-061-063-165-177-100815-
/O.NEW.KEAX.SV.W.0085.210710T0728Z-210710T0815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
228 AM CDT Sat Jul 10 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northwestern Leavenworth County in northeastern Kansas...
  Southeastern Atchison County in northeastern Kansas...
  Buchanan County in northwestern Missouri...
  Southwestern Daviess County in north central Missouri...
  Clay County in west central Missouri...
  Clinton County in northwestern Missouri...
  Northwestern Ray County in west central Missouri...
  Caldwell County in north central Missouri...
  Platte County in west central Missouri...
  Southern DeKalb County in northwestern Missouri...

* Until 315 AM CDT.

* At 227 AM CDT, severe thunderstorms were located along a line
  extending from near Clarksdale to near Leavenworth, moving east at
  45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  St. Joseph, Leavenworth, Liberty, Excelsior Springs, Cameron,
  Smithville, Kearney, Platte City, Lawson, Plattsburg, Lathrop,
  Hamilton, Weston, Gower, Elwood, Stewartsville, Agency, Trimble,
  Polo and Edgerton.

This includes the following highways...
 Interstate 35 in Missouri between mile markers 19 and 59.
 Interstate 29 between mile markers 11 and 51.
 Interstate 435 between mile markers 27 and 46.
 Interstate 229 between mile markers 0 and 9.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3968 9500 3969 9497 3973 9497 3974 9495
      3972 9489 3974 9486 3977 9487 3976 9491
      3978 9494 3979 9488 3982 9487 3983 9390
      3944 9387 3927 9409 3929 9518
TIME...MOT...LOC 0727Z 284DEG 39KT 3989 9459 3931 9488 

HAIL...<.75IN
WIND...60MPH
 
$$

Leighton

3 follow-up statements

090 
WWUS53 KEAX 100754
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
254 AM CDT Sat Jul 10 2021

KSC005-103-MOC021-165-100803-
/O.CAN.KEAX.SV.W.0085.000000T0000Z-210710T0815Z/
Leavenworth KS-Atchison KS-Buchanan MO-Platte MO-
254 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LEAVENWORTH...
SOUTHEASTERN ATCHISON...BUCHANAN AND PLATTE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for 
north central, northwestern and west central Missouri. A severe 
thunderstorm still remains in effect for southern Platte County 
through 3 am.

LAT...LON 3983 9390 3944 9387 3927 9409 3929 9460
      3971 9460 3982 9458
TIME...MOT...LOC 0753Z 284DEG 39KT 3982 9424 3924 9453 

$$

MOC025-047-049-061-063-177-100815-
/O.CON.KEAX.SV.W.0085.000000T0000Z-210710T0815Z/
Daviess MO-Clay MO-Clinton MO-Ray MO-Caldwell MO-DeKalb MO-
254 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT
FOR SOUTHWESTERN DAVIESS...CLAY...CLINTON...NORTHWESTERN RAY...
CALDWELL AND SOUTHERN DEKALB COUNTIES...

At 253 AM CDT, severe thunderstorms were located along a line
extending from near Cameron to near Gladstone, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Liberty, Excelsior Springs, Cameron, Smithville, Kearney, Lawson,
Plattsburg, Lathrop, Hamilton, Gower, Stewartsville, Trimble, Polo,
Holt, Osborn, Crystal Lakes, Kingston, Clarksdale, Cowgill and
Excelsior Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 9390 3944 9387 3927 9409 3929 9460
      3971 9460 3982 9458
TIME...MOT...LOC 0753Z 284DEG 39KT 3982 9424 3924 9453 

HAIL...<.75IN
WIND...60MPH
 
$$

Leighton

482 
WWUS53 KEAX 100809
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
309 AM CDT Sat Jul 10 2021

MOC025-047-049-061-063-177-100815-
/O.CON.KEAX.SV.W.0085.000000T0000Z-210710T0815Z/
Daviess MO-Clay MO-Clinton MO-Ray MO-Caldwell MO-DeKalb MO-
309 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT
FOR SOUTHWESTERN DAVIESS...NORTHEASTERN CLAY...EASTERN CLINTON...
NORTHWESTERN RAY...CALDWELL AND SOUTHEASTERN DEKALB COUNTIES...

At 309 AM CDT, severe thunderstorms were located along a line
extending from near Hamilton to near River Bend, moving east at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Liberty, Excelsior Springs, Cameron, Kearney, Lawson, Lathrop,
Hamilton, Polo, Holt, Crystal Lakes, Kingston, Cowgill, Excelsior
Estates, Woods Heights, Kidder, Rayville, Mosby, Homestead,
Prathersville and Elmira.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 9390 3944 9387 3927 9409 3929 9440
      3982 9425
TIME...MOT...LOC 0809Z 284DEG 39KT 3979 9406 3921 9435 

HAIL...<.75IN
WIND...60MPH
 
$$

Leighton

835 
WWUS53 KEAX 100814
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
314 AM CDT Sat Jul 10 2021

MOC025-047-049-061-063-177-100823-
/O.EXP.KEAX.SV.W.0085.000000T0000Z-210710T0815Z/
Daviess MO-Clay MO-Clinton MO-Ray MO-Caldwell MO-DeKalb MO-
314 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DAVIESS...
NORTHEASTERN CLAY...EASTERN CLINTON...NORTHWESTERN RAY...CALDWELL AND
SOUTHEASTERN DEKALB COUNTIES WILL EXPIRE AT 315 AM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with these
thunderstorms.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
north central, northwestern and west central Missouri.

LAT...LON 3983 9390 3944 9387 3927 9409 3929 9440
      3982 9425
TIME...MOT...LOC 0813Z 284DEG 39KT 3979 9404 3921 9433 

$$

Leighton

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 1:44 AM CDT	Severe Thunderstorm Warning	EAX	Atchison, Doniphan, Leavenworth	46 min
Jul 10, 2:09 AM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	51 min
Jul 10, 2:51 AM CDT	Special Weather Statement	EAX	Johnson, Wyandotte	39 min
Jul 10, 3:32 AM CDT	Special Weather Statement	EAX	Miami	43 min
Jul 10, 8:27 AM CDT	Special Weather Statement	EAX	Linn	48 min
Jul 10, 8:47 AM CDT	Flash Flood Warning	EAX	Linn, Miami	3 hr
Jul 10, 5:45 PM CDT	Special Weather Statement	EAX	Wyandotte	45 min
Jul 10, 6:39 PM CDT	Special Weather Statement	EAX	Leavenworth	51 min
Jul 9, 8:01 PM CDT	Special Weather Statement	EAX	Schuyler	44 min
Jul 9, 8:10 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Schuyler	35 min
Jul 9, 8:37 PM CDT	Special Weather Statement	EAX	Grundy	38 min
Jul 9, 8:44 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Schuyler	46 min
Jul 9, 8:50 PM CDT	Special Weather Statement	EAX	Putnam, Schuyler	40 min
Jul 9, 9:18 PM CDT	Special Weather Statement	EAX	Linn	42 min
Jul 9, 9:23 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Macon	52 min
Jul 9, 9:26 PM CDT	Special Weather Statement	EAX	Adair	49 min
Jul 9, 9:36 PM CDT	Tornado Warning	EAX	Adair, Macon	12 min
Jul 9, 10:07 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Macon	38 min
Jul 9, 10:44 PM CDT	Special Weather Statement	EAX	Linn, Macon, Randolph, Sullivan	46 min
Jul 9, 10:51 PM CDT	Special Weather Statement	EAX	Harrison	39 min
Jul 9, 11:28 PM CDT	Special Weather Statement	EAX	Linn, Randolph	47 min
Jul 10, 12:04 AM CDT	Severe Thunderstorm Warning	EAX	Chariton, Howard, Macon, Randolph	41 min
Jul 10, 12:53 AM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway, Worth	52 min
Jul 10, 1:37 AM CDT	Flash Flood Warning	EAX	Adair, Sullivan	8 hr
Jul 10, 1:40 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Atchison, DeKalb, Gentry, Holt, Nodaway and 1 more	50 min
Jul 10, 2:32 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Daviess, DeKalb, Gentry, Harrison, Nodaway and 1 more	43 min
Jul 10, 2:35 AM CDT	Flash Flood Warning	EAX	Linn, Macon	7 hr
Jul 10, 3:11 AM CDT	Special Weather Statement	EAX	Caldwell, Carroll, Daviess, Grundy, Harrison, Livingston and 2 more	49 min
Jul 10, 5:30 AM CDT	River Flood Warning	EAX	Chariton, Macon	3 days
Jul 10, 5:30 AM CDT	River Flood Warning	EAX	Carroll, Chariton, Linn, Livingston	5 days
Jul 10, 5:30 AM CDT	River Flood Warning	EAX	Cass, Henry, Johnson	2 hr
Jul 10, 7:46 AM CDT	River Flood Warning	EAX	Howard	13 hr
Jul 10, 9:45 AM CDT	Areal Flood Advisory	EAX	Adair, Linn, Macon, Sullivan	4 days
Jul 10, 3:47 PM CDT	Special Weather Statement	EAX	Atchison	43 min
Jul 10, 5:07 PM CDT	Special Weather Statement	EAX	Holt	38 min
Jul 10, 6:06 PM CDT	Special Weather Statement	EAX	Buchanan, Clinton, Daviess, DeKalb, Gentry	39 min
Jul 10, 6:18 PM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Clay, Clinton, Platte	27 min
Jul 10, 6:25 PM CDT	Special Weather Statement	EAX	Jackson	50 min
Jul 10, 6:47 PM CDT	Special Weather Statement	EAX	Clay, Clinton, Platte	43 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Severe Thunderstorm Warnings in Kansas, 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.