Alert archive / Missouri / Tornado Warnings in 2020

Tornado Warning 7, NWS Kansas City, MO

July 29, 2020Clay County, Platte County, Missouri

NWS Kansas City, MO issued this tornado warning at Jul 29, 2020, 1:34 PM CDT for Clay County, Platte County, Missouri. It was in force for 26 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 29, 2020, 1:34 PM CDT (18:34 UTC)
Expired: Jul 29, 2020, 2:00 PM CDT
In force: 26 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Clay County, MO, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 68 km from the middle of the area, began a volume at 18:34 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 29, 1:45 PM CDT	TORNADO	Smithville, MO	DELAYED REPORT.

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 12:00Z, 6.6 hours before the alert went out and 101 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: 749 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

723 
WFUS53 KEAX 291834
TOREAX
MOC047-165-291900-
/O.NEW.KEAX.TO.W.0007.200729T1834Z-200729T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Kansas City/Pleasant Hill MO
134 PM CDT Wed Jul 29 2020

The National Weather Service in Pleasant Hill has issued a

* Tornado Warning for...
  Northwestern Clay County in west central Missouri...
  East central Platte County in west central Missouri...

* Until 200 PM CDT.
    
* At 133 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Smithville, moving north at 5 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Smithville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3933 9456 3934 9467 3944 9462 3944 9447
TIME...MOT...LOC 1833Z 196DEG 6KT 3937 9460 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Blair

2 follow-up statements

796 
WWUS53 KEAX 291849
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
149 PM CDT Wed Jul 29 2020

MOC047-165-291900-
/O.CON.KEAX.TO.W.0007.000000T0000Z-200729T1900Z/
Clay MO-Platte MO-
149 PM CDT Wed Jul 29 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM CDT FOR
NORTHWESTERN CLAY AND EAST CENTRAL PLATTE COUNTIES...
    
At 149 PM CDT, a confirmed tornado was located near Smithville, 
moving north at 5 mph.

HAZARD...Damaging tornado.

SOURCE...Emergency management confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Smithville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3944 9462 3944 9447 3933 9456 3934 9467
TIME...MOT...LOC 1849Z 194DEG 6KT 3939 9460 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Blair

473 
WWUS53 KEAX 291900
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
200 PM CDT Wed Jul 29 2020

MOC047-165-291910-
/O.EXP.KEAX.TO.W.0007.000000T0000Z-200729T1900Z/
Clay MO-Platte MO-
200 PM CDT Wed Jul 29 2020

...THE TORNADO WARNING FOR NORTHWESTERN CLAY AND EAST CENTRAL PLATTE
COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been allowed to expire.

LAT...LON 3944 9462 3944 9447 3933 9456 3934 9467
TIME...MOT...LOC 1900Z 196DEG 6KT 3941 9459 

$$

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 1:55 PM CDT	Tornado Warning	EAX	Clay	35 min
Jul 29, 2:28 PM CDT	Special Weather Statement	EAX	Ray	47 min
Jul 29, 5:16 PM CDT	River Flood Warning	EAX	Ray	22 hr
Jul 29, 5:52 PM CDT	Special Weather Statement	EAX	Buchanan	38 min
Jul 29, 5:58 PM CDT	Areal Flood Advisory	EAX	Buchanan	3 hr
Jul 29, 6:46 PM CDT	Areal Flood Warning	EAX	Buchanan	9 hr

Nearby

Tornado Warnings in Missouri, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.