Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 82, NWS Kansas City, MO

July 10, 20217 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 10, 2021, 1:40 AM CDT for 7 counties in Missouri. It was in force for 50 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: Jul 10, 2021, 1:40 AM CDT (06:40 UTC)
Expired: Jul 10, 2021, 2:30 AM CDT
In force: 50 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Andrew County, MO, Atchison County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 152 km from the middle of the area, began a volume at 06:42 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, 2:21 AM CDT	TSTM WND DMG	Union Star, MO	SEVERAL 2 TO 4 INCH LIMBS DOWN.

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, 6.7 hours before the alert went out and 127 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.

741 
WUUS53 KEAX 100640
SVREAX
MOC003-005-063-075-087-147-227-100730-
/O.NEW.KEAX.SV.W.0082.210710T0640Z-210710T0730Z/

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

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Worth County in northwestern Missouri...
  Gentry County in northwestern Missouri...
  Southeastern Atchison County in northwestern Missouri...
  Holt County in northwestern Missouri...
  Nodaway County in northwestern Missouri...
  Andrew County in northwestern Missouri...
  Northwestern DeKalb County in northwestern Missouri...

* Until 230 AM CDT.

* At 139 AM CDT, severe thunderstorms were located along a line
  extending from near Athelstan to Hiawatha, moving southeast at 45
  mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Maryville, Savannah, Albany, Stanberry, Mound City, Maysville,
  Country Club Villa, Country Club, King City, Grant City, Oregon,
  Burlington Junction, Hopkins, Ravenwood, Union Star, Maitland,
  Amazonia, Skidmore, Forest City and Craig.

This includes the following highways...
 Interstate 29 between mile markers 52 and 97.
 Interstate 229 between mile markers 11 and 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 9429 3982 9432 3982 9481 3984 9493
      3990 9494 3990 9502 3986 9504 3986 9509
      3988 9514 3991 9515 3990 9520 3994 9520
      4001 9532 4004 9542 4007 9539 4012 9539
      4019 9548 4058 9518
TIME...MOT...LOC 0639Z 295DEG 38KT 4061 9458 3987 9555 

HAIL...0.75IN
WIND...70MPH
 
$$

Leighton

1 follow-up statement

707 
WWUS53 KEAX 100705
SVSEAX

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

MOC005-100715-
/O.CAN.KEAX.SV.W.0082.000000T0000Z-210710T0730Z/
Atchison MO-
205 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ATCHISON COUNTY
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
northeastern Kansas...and northwestern Missouri.

LAT...LON 4057 9429 3982 9432 3982 9481 3984 9493
      3990 9494 3990 9502 3986 9504 3986 9509
      3988 9514 3991 9515 3990 9520 3994 9520
      4001 9532 4027 9518 4058 9498
TIME...MOT...LOC 0705Z 292DEG 39KT 4056 9438 3972 9510 

$$

MOC003-063-075-087-147-227-100730-
/O.CON.KEAX.SV.W.0082.000000T0000Z-210710T0730Z/
Worth MO-Gentry MO-Holt MO-Nodaway MO-Andrew MO-DeKalb MO-
205 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR WORTH...GENTRY...HOLT...NODAWAY...ANDREW AND NORTHWESTERN DEKALB
COUNTIES...

At 205 AM CDT, severe thunderstorms were located along a line
extending from Irena to near Troy, moving southeast at 45 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Maryville, Savannah, Albany, Stanberry, Mound City, Maysville,
Country Club Villa, Country Club, King City, Grant City, Oregon,
Burlington Junction, Hopkins, Ravenwood, Union Star, Maitland,
Amazonia, Skidmore, Forest City and Fillmore.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 9429 3982 9432 3982 9481 3984 9493
      3990 9494 3990 9502 3986 9504 3986 9509
      3988 9514 3991 9515 3990 9520 3994 9520
      4001 9532 4027 9518 4058 9498
TIME...MOT...LOC 0705Z 292DEG 39KT 4056 9438 3972 9510 

HAIL...0.75IN
WIND...70MPH
 
$$

Leighton

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 1:44 AM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Clinton, DeKalb, Platte	46 min
Jul 10, 2:09 AM CDT	Severe Thunderstorm Warning	EAX	Clay, Jackson, Platte	51 min
Jul 10, 2:28 AM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Caldwell, Clay, Clinton, Daviess, DeKalb and 2 more	47 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, 2:51 AM CDT	Special Weather Statement	EAX	Cass, Jackson, Johnson, Lafayette	39 min
Jul 10, 3:11 AM CDT	Special Weather Statement	EAX	Caldwell, Carroll, Daviess, Grundy, Harrison, Livingston and 2 more	49 min
Jul 10, 3:32 AM CDT	Special Weather Statement	EAX	Cass, Johnson, Lafayette, Pettis, Saline	43 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, 8:27 AM CDT	Special Weather Statement	EAX	Bates	48 min
Jul 10, 8:47 AM CDT	Flash Flood Warning	EAX	Bates, Cass	3 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 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.