Alert archive / Missouri / Tornado Warnings in 2017

Tornado Warning 22, NWS Kansas City, MO

April 15, 2017Atchison County, Missouri

NWS Kansas City, MO issued this tornado warning at Apr 15, 2017, 7:14 PM CDT for Atchison County, Missouri. It was in force for 16 min. 3 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: Apr 15, 2017, 7:14 PM CDT (00:14 UTC)
Expired: Apr 15, 2017, 7:30 PM CDT
In force: 16 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Atchison County, MO

The radar

The Omaha radar (KOAX), 120 km from the middle of the area, began a volume at 00:17 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
Apr 15, 7:15 PM CDT	FUNNEL CLOUD	8 N Rockport, MO
Apr 15, 7:25 PM CDT	TORNADO	3 Nw Westboro, MO	SPOTTER CONFIRMED TORNADO 1/2 MILE E OF HIGHWAY 59, 2 MILES SOUTH OF MO/IA BORDER.
Apr 15, 7:27 PM CDT	TORNADO	5 Nw Tarkio, MO	BRIEF TOUCHDOWN.

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
Apr 15, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.2 hours before the alert went out and 120 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: 1034 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1322 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

805 
WFUS53 KEAX 160014
TOREAX
MOC005-160030-
/O.NEW.KEAX.TO.W.0022.170416T0014Z-170416T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Kansas City/Pleasant Hill MO
714 PM CDT SAT APR 15 2017

The National Weather Service in Pleasant Hill has issued a

* Tornado Warning for...
  Northeastern Atchison County in northwestern Missouri...

* Until 730 PM CDT
    
* At 713 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles northwest of Tarkio, moving east at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  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...
  Westboro.

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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Pleasant Hill.

&&

LAT...LON 4058 9527 4045 9531 4047 9556 4058 9554
TIME...MOT...LOC 0013Z 270DEG 27KT 4053 9547 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

LG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:30 PM CDT	Tornado Warning Tornado observed	EAX	Atchison, Nodaway	30 min
Apr 15, 7:59 PM CDT	Tornado Warning Tornado observed	EAX	Atchison, Nodaway	16 min
Apr 15, 8:28 PM CDT	Special Weather Statement	EAX	Nodaway	32 min
Apr 15, 8:37 PM CDT	Severe Thunderstorm Warning	EAX	Nodaway, Worth	23 min
Apr 15, 9:33 PM CDT	Special Weather Statement	EAX	Holt	27 min
Apr 16, 1:00 AM CDT	Special Weather Statement	EAX	Cass	45 min

Nearby

Tornado Warnings in Missouri, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.