Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 93, NWS Kansas City, MO

July 30, 20214 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 30, 2021, 10:05 PM CDT for 4 counties in Missouri. It was in force for 55 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 30, 2021, 10:05 PM CDT (03:05 UTC)
Expired: Jul 30, 2021, 11:00 PM CDT
In force: 55 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Atchison County, MO, Gentry County, MO, Nodaway County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 165 km from the middle of the area, began a volume at 03:08 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 30, 10:57 PM CDT	HAIL 1	Maryville, MO	DELAYED 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 30, 8:47 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.1 hours before the alert went out and 173 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: 2669 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 19.5

Open this sounding in Storm Lab

The text

As transmitted.

298 
WUUS53 KEAX 310305
SVREAX
MOC005-075-147-227-310400-
/O.NEW.KEAX.SV.W.0093.210731T0305Z-210731T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
1005 PM CDT Fri Jul 30 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Worth County in northwestern Missouri...
  Northwestern Gentry County in northwestern Missouri...
  Eastern Atchison County in northwestern Missouri...
  Nodaway County in northwestern Missouri...

* Until 1100 PM CDT.

* At 1004 PM CDT, severe thunderstorms were located along a line
  extending from near Bedford to Braddyville to 6 miles southeast of
  Farragut, moving southeast at 30 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...
  Maryville, Tarkio, Grant City, Burlington Junction, Hopkins,
  Ravenwood, Skidmore, Irena, Conception Junction, Sheridan, Parnell,
  Clearmont, Elmo, Pickering, Westboro, Clyde, Gentry, Arkoe, Worth
  and Allendale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 9424 4039 9422 4025 9459 4026 9529
      4058 9549
TIME...MOT...LOC 0304Z 317DEG 26KT 4073 9473 4059 9500 4064 9541 

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

Blair

2 follow-up statements

190 
WWUS53 KEAX 310338
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1038 PM CDT Fri Jul 30 2021

MOC005-075-147-227-310400-
/O.CON.KEAX.SV.W.0093.000000T0000Z-210731T0400Z/
Worth MO-Gentry MO-Atchison MO-Nodaway MO-
1038 PM CDT Fri Jul 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR WORTH...NORTHWESTERN GENTRY...EASTERN ATCHISON AND NODAWAY
COUNTIES...

At 1037 PM CDT, severe thunderstorms were located along a line
extending from Athelstan to 6 miles northeast of Maryville to 7 miles
south of Blanchard, moving southeast at 30 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...
Maryville, Grant City, Burlington Junction, Hopkins, Ravenwood,
Skidmore, Irena, Conception Junction, Sheridan, Parnell, Clearmont,
Elmo, Pickering, Braddyville, Westboro, Clyde, Gentry, Arkoe, Worth
and Allendale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 9424 4039 9422 4025 9459 4026 9524
      4058 9543
TIME...MOT...LOC 0337Z 317DEG 26KT 4057 9453 4043 9480 4048 9521 

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

Blair

355 
WWUS53 KEAX 310347
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1047 PM CDT Fri Jul 30 2021

MOC005-075-147-227-310400-
/O.CON.KEAX.SV.W.0093.000000T0000Z-210731T0400Z/
Worth MO-Gentry MO-Atchison MO-Nodaway MO-
1047 PM CDT Fri Jul 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR WORTH...NORTHWESTERN GENTRY...NORTHEASTERN ATCHISON AND NODAWAY
COUNTIES...

At 1047 PM CDT, severe thunderstorms were located along a line
extending from near Grant City to near Ravenwood to near Burlington
Junction, moving southeast at 30 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...
Maryville, Grant City, Burlington Junction, Hopkins, Ravenwood,
Skidmore, Irena, Conception Junction, Sheridan, Parnell, Clearmont,
Elmo, Pickering, Braddyville, Clyde, Gentry, Arkoe, Worth, Allendale
and Quitman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 9424 4039 9422 4025 9459 4026 9508
      4058 9529
TIME...MOT...LOC 0347Z 317DEG 26KT 4051 9446 4037 9473 4042 9514 

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
Jul 30, 10:57 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Gentry, Harrison, Nodaway, Worth	48 min
Jul 30, 10:59 PM CDT	Severe Thunderstorm Warning	EAX	Harrison, Mercer	46 min
Jul 30, 11:45 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, DeKalb, Gentry, Grundy, Harrison, Livingston	45 min
Jul 31, 12:27 AM CDT	Special Weather Statement	EAX	Livingston	33 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.