Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Kansas City, MO

March 10, 20214 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Mar 10, 2021, 6:52 PM CST for 4 counties in Missouri. It was in force for 38 min. 2 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: Mar 10, 2021, 6:52 PM CST (00:52 UTC)
Expired: Mar 10, 2021, 7:30 PM CST
In force: 38 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Grundy County, MO, Mercer County, MO, Putnam County, MO, Sullivan County, MO

The radar

The Des Moines radar (KDMX), 154 km from the middle of the area, began a volume at 00:54 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
Mar 10, 6:52 PM CST	TSTM WND DMG	Modena, MO	OUTBUILDING BLOWN DOWN IN THE MODENA AREA. DAMAGE TO SEVERAL VEHICLES. SEVERAL POWER POLES WERE ALSO SNAPPED. TIME ESTIMATED FROM RADAR. REPORTED BY MERCER COUNTY SHERIFF, RELAYED BY EMERGENCY MANAGEMENT.
Mar 10, 7:10 PM CST	HAIL 0.88	Newtown, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.9 hours before the alert went out and 252 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: 37 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2945 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

406 
WUUS53 KEAX 110052
SVREAX
MOC079-129-171-211-110130-
/O.NEW.KEAX.SV.W.0001.210311T0052Z-210311T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
652 PM CST Wed Mar 10 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northern Grundy County in north central Missouri...
  Western Putnam County in north central Missouri...
  Southern Mercer County in north central Missouri...
  Northwestern Sullivan County in north central Missouri...

* Until 730 PM CST.

* At 651 PM CST, a severe thunderstorm was located near Spickard, or
  16 miles north of Trenton, moving northeast at 50 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...
  Unionville, Princeton, Spickard, Newtown, Pollock, Lucerne,
  Brimson, Harris, Powersville, Lemons, Modena and Mill Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4032 9301 4014 9376 4036 9376 4058 9325
      4058 9301
TIME...MOT...LOC 0051Z 245DEG 44KT 4031 9367 

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

Blair

2 follow-up statements

196 
WWUS53 KEAX 110114
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
714 PM CST Wed Mar 10 2021

MOC079-129-171-211-110130-
/O.CON.KEAX.SV.W.0001.000000T0000Z-210311T0130Z/
Grundy MO-Putnam MO-Mercer MO-Sullivan MO-
714 PM CST Wed Mar 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CST
FOR NORTHERN GRUNDY...SOUTHWESTERN PUTNAM...SOUTHERN MERCER AND
NORTHWESTERN SULLIVAN COUNTIES...

At 714 PM CST, a severe thunderstorm was located 13 miles northwest
of Milan, moving east at 50 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...
Unionville, Spickard, Newtown, Pollock, Brimson, Harris, Lemons,
Modena and Mill Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4032 9301 4014 9376 4032 9376 4053 9301
TIME...MOT...LOC 0114Z 250DEG 45KT 4036 9328 

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

Blair

229 
WWUS53 KEAX 110126
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
726 PM CST Wed Mar 10 2021

MOC079-129-171-211-110136-
/O.EXP.KEAX.SV.W.0001.000000T0000Z-210311T0130Z/
Grundy MO-Putnam MO-Mercer MO-Sullivan MO-
726 PM CST Wed Mar 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN GRUNDY...SOUTHWESTERN
PUTNAM...SOUTHERN MERCER AND NORTHWESTERN SULLIVAN COUNTIES WILL
EXPIRE AT 730 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4032 9301 4014 9376 4032 9376 4053 9301
TIME...MOT...LOC 0126Z 245DEG 44KT 4041 9315 

$$

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 6:15 PM CST	Special Weather Statement	EAX	Harrison	45 min
Mar 10, 7:03 PM CST	Special Weather Statement	EAX	Clay	27 min
Mar 10, 8:01 PM CST	Special Weather Statement	EAX	Jackson	14 min
Mar 11, 3:43 AM CST	Flood Watch	EAX	Bates, Cass, Cooper, Henry, Johnson, Pettis	59 hr
Mar 11, 10:07 AM CST	River Flood Warning	EAX	Johnson, Pettis	9 days
Mar 11, 10:07 AM CST	River Flood Warning	EAX	Cooper, Saline	13 days
Mar 11, 10:07 AM CST	River Flood Warning	EAX	Cass, Henry, Johnson	9 days
Mar 11, 10:07 AM CST	River Flood Warning	EAX	Bates, Cass, Henry	4 days
Mar 11, 10:07 AM CST	River Flood Warning	EAX	Cooper	3 days

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.