Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 16, NWS Kansas City, MO

October 9, 2018Mercer County, Missouri

NWS Kansas City, MO issued this tornado warning at Oct 9, 2018, 4:29 PM CDT for Mercer County, Missouri. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 9, 2018, 4:29 PM CDT (21:29 UTC)
Expired: Oct 9, 2018, 5:00 PM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Mercer County, MO

The radar

The Des Moines radar (KDMX), 148 km from the middle of the area, began a volume at 21:33 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 9, 1:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.5 hours before the alert went out and 254 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

119 
WFUS53 KEAX 092129
TOREAX
MOC129-092200-
/O.NEW.KEAX.TO.W.0016.181009T2129Z-181009T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Kansas City/Pleasant Hill MO
429 PM CDT TUE OCT 9 2018

The National Weather Service in Pleasant Hill has issued a

* Tornado Warning for...
  Central Mercer County in north central Missouri...

* Until 500 PM CDT.
    
* At 429 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Princeton, or 18 miles north of Trenton, moving
  north at 35 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...
  Princeton, Mercer, South Lineville, Mill Grove and Modena. 

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 4029 9356 4030 9372 4058 9370 4058 9344
TIME...MOT...LOC 2129Z 193DEG 32KT 4035 9364 

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

$$

Blair

1 follow-up statement

493 
WWUS53 KEAX 092153
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
453 PM CDT TUE OCT 9 2018

MOC129-092203-
/O.EXP.KEAX.TO.W.0016.000000T0000Z-181009T2200Z/
Mercer MO-
453 PM CDT TUE OCT 9 2018

...THE TORNADO WARNING FOR CENTRAL MERCER COUNTY WILL EXPIRE AT 500
PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until 900 PM CDT for north central
Missouri.

LAT...LON 4029 9356 4030 9372 4058 9370 4058 9344
TIME...MOT...LOC 2153Z 193DEG 32KT 4054 9358 

$$

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 8, 9:59 PM CDT	River Flood Warning	EAX	Andrew, Holt, Nodaway	65 hr
Oct 9, 11:29 AM CDT	Areal Flood Warning	EAX	Andrew, Atchison, Daviess, DeKalb, Gentry, Harrison and 3 more	24 hr
Oct 9, 2:54 PM CDT	Tornado Warning	EAX	Caldwell, Ray	36 min
Oct 9, 3:35 PM CDT	Areal Flood Warning	EAX	Caldwell, Clinton, Daviess, DeKalb, Grundy, Harrison and 7 more	12 hr
Oct 9, 3:50 PM CDT	Areal Flood Warning	EAX	Andrew, Bates, Buchanan, Cass, Clay, Clinton and 3 more	12 hr

Nearby

Tornado Warnings in Missouri, 2018 Every tornado warning in 2018 Tornadoes in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.