Alert archive / Missouri / Tornado Warnings in 2001

Tornado Warning 6, NWS Kansas City, MO

April 11, 2001Andrew County, Gentry County, Missouri

NWS Kansas City, MO issued this tornado warning at Apr 11, 2001, 10:50 AM CDT for Andrew County, Gentry County, Missouri. It was in force for 40 min. 3 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Apr 11, 2001, 10:50 AM CDT (15:50 UTC)
Expired: Apr 11, 2001, 11:30 AM CDT
In force: 40 min
Issued by: NWS Kansas City, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Andrew County, MO, Gentry County, MO

The radar

The Pleasant Hill radar (KEAX), 146 km from the middle of the area, began a volume at 15:51 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
Apr 11, 10:55 AM CDT	Hail 0.75	Empire Prairie, MO
Apr 11, 11:14 AM CDT	Hail 0.75	Stanberry, MO
Apr 11, 11:15 AM CDT	Hail 1.75	Stanberry, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 11, 9:30 AM CDT	Tornado Watch	SPC	6 hr
Apr 11, 10:45 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 3.8 hours before the alert went out and 151 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: 1312 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 369 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KEAX 111550
TORMCI
MOC003-075-111630-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1050 AM CDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ANDREW COUNTY IN NORTHWEST MISSOURI
  GENTRY COUNTY IN NORTHWEST MISSOURI

* UNTIL 1130 AM CDT

* AT 1050 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 3 MILES EAST OF AVENUE CITY...OR 6 MILES
  SOUTHEAST OF SAVANNAH...MOVING NORTHEAST AT 50 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  ROSENDALE AT 1055 AM CDT
  WHITESVILLE AT 1100 AM CDT
  FORD CITY AT 1110 AM CDT
  STANBERRY AT 1115 AM CDT
  DARLINGTON AT 1120 AM CDT
  GENTRY AT 1125 AM CDT

THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING
PREVIOUSLY ISSUED FOR ANDREW COUNTY.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
NOT BE OCCURRING WHEN THE WARNING IS ISSUED...BUT ONE IS EXPECTED TO
DEVELOP. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE
INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT DRIVE INTO THIS STORM AND DO NOT SEEK
SHELTER UNDER A HIGHWAY OVERPASS

LAT...LON 4038 9458 4029 9462 4014 9462 4013 9489
          3985 9490 3985 9467 3984 9466 3984 9463
          4006 9463 4006 9424 4038 9424

18

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 9:30 PM CDT	Severe Thunderstorm Warning	EAX	Adair	45 min
Apr 11, 3:10 AM CDT	Severe Thunderstorm Warning	EAX	Atchison	50 min
Apr 11, 3:58 AM CDT	Severe Thunderstorm Warning	EAX	Nodaway	62 min
Apr 11, 10:10 AM CDT	Severe Thunderstorm Warning	EAX	Platte	35 min
Apr 11, 10:23 AM CDT	Severe Thunderstorm Warning	EAX	Buchanan	52 min
Apr 11, 10:38 AM CDT	Severe Thunderstorm Warning	EAX	Andrew	37 min
Apr 11, 11:21 AM CDT	Tornado Warning	EAX	Worth	24 min

Nearby

Tornado Warnings in Missouri, 2001 Every tornado warning in 2001 Tornadoes in 2001

Sources

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