Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 94, NWS Kansas City, MO

July 30, 20215 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 30, 2021, 10:57 PM CDT for 5 counties in Missouri. It was in force for 48 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, 10:57 PM CDT (03:57 UTC)
Expired: Jul 30, 2021, 11:45 PM CDT
In force: 48 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Andrew County, MO, Gentry County, MO, Harrison County, MO, Nodaway County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 155 km from the middle of the area, began a volume at 04:00 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

Topeka, KS (KTOP), launched 00:00Z, 4.0 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: 1481 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 2071 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

368 
WUUS53 KEAX 310357
SVREAX
MOC003-075-081-147-227-310445-
/O.NEW.KEAX.SV.W.0094.210731T0357Z-210731T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
1057 PM CDT Fri Jul 30 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southern Worth County in northwestern Missouri...
  Gentry County in northwestern Missouri...
  Southwestern Harrison County in north central Missouri...
  Southeastern Nodaway County in northwestern Missouri...
  Northeastern Andrew County in northwestern Missouri...

* Until 1145 PM CDT.

* At 1057 PM CDT, severe thunderstorms were located along a line
  extending from near Grant City to near Ravenwood to near Maryville,
  moving south 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.

* Severe thunderstorms will be near...
  Stanberry around 1115 PM CDT.

Other locations in the path of these severe thunderstorms include
Albany, New Hampton and King City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4022 9406 4013 9419 4014 9421 4012 9422
      4004 9433 4003 9481 4041 9502 4048 9425
TIME...MOT...LOC 0357Z 339DEG 22KT 4044 9436 4033 9459 4035 9497 

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, 10:05 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Gentry, Nodaway, Worth	55 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.