Alert archive / Louisiana / Tornado Warnings in 2009

Tornado Warning 101, NWS Jackson, MS

October 15, 2009Tensas Parish, Louisiana

NWS Jackson, MS issued this tornado warning at Oct 15, 2009, 12:20 PM CDT for Tensas Parish, Louisiana. It was in force for 40 min. 6 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: Oct 15, 2009, 12:20 PM CDT (17:20 UTC)
Expired: Oct 15, 2009, 1:00 PM CDT
In force: 40 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Tensas Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 115 km from the middle of the area, began a volume at 17:21 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
Oct 15, 12:42 PM CDT	TSTM WND DMG	4 N St. Joseph, LA	STORAGE BUILDING ALONG HIGHWAY 65 DAMAGED.
Oct 15, 12:44 PM CDT	TSTM WND GST 60	1 N Lake Bruin, LA	A NUMBER OF LARGE LIMBS AND SOME TREES DOWN ALONG THE NORTHERN PART OF LAKE BRUIN...AND SOME DOWNED POWER LINES...WERE DETERMINED TO BE THE RESULT OF STRAIGHT LINE WINDS ESTIMATED AROUND 60 MPH.
Oct 15, 12:44 PM CDT	TORNADO 0	5 Nw St. Joseph, LA	EF0 TORNADO TOUCHED DOWN 5 MILES NW OF ST. JOSEPH AT 1244 PM CDT...LIFTING 4 MILES NW OF ST. JOSEPH AT 1245 PM CDT. MOBILE HOME ROLLED OVER. SOUTH AND WEST SIDES OF METAL COMMERCIAL BUILDING BLOWN OUT...WITH SOME ROOF TILES BLOWN OUT.
Oct 15, 12:45 PM CDT	TSTM WND DMG	Lake Bruin, LA	POWERLINES DOWN ON THE NORTHWEST AND SOUTHEAST SIDES OF LAKE BRUIN
Oct 15, 12:46 PM CDT	TSTM WND DMG	Lake Bruin, LA	TREES AND LARGE LIMBS DOWN AT LAKE BRUIN GOLF AND COUNTRY CLUB.
Oct 15, 12:50 PM CDT	FUNNEL CLOUD	St. Joseph, LA	SHERIFF REPORTS A POSSIBLE TORNADO IN ST. JOSEPH. NO REPORTS OF DAMAGE AT THIS TIME.

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
Oct 15, 7:08 AM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.3 hours before the alert went out and 107 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: 1438 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KJAN 151720
TORJAN
LAC107-151800-
/O.NEW.KJAN.TO.W.0101.091015T1720Z-091015T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1220 PM CDT THU OCT 15 2009

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL TENSAS PARISH IN NORTHEAST LOUISIANA...

* UNTIL 100 PM CDT

* AT 1220 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHWEST OF NEWLIGHT MOVING EAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  NEWLIGHT BY 1225 PM CDT...
  LAKE BRUIN AND NEWELLTON BY 1240 PM CDT...
  ST. JOSEPH BY 1245 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR NORTHEAST LOUISIANA AND SOUTHWESTERN
MISSISSIPPI.

&&

LAT...LON 3219 9148 3217 9116 3214 9115 3215 9108
      3213 9103 3209 9108 3206 9107 3206 9109
      3209 9113 3208 9115 3203 9108 3199 9111
      3199 9116 3191 9121 3196 9150
TIME...MOT...LOC 1720Z 277DEG 38KT 3205 9151

$$

COHEN

2 follow-up statements

000 
WWUS54 KJAN 151724
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1224 PM CDT THU OCT 15 2009

LAC107-151800-
/O.CON.KJAN.TO.W.0101.000000T0000Z-091015T1800Z/
TENSAS LA-
1224 PM CDT THU OCT 15 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR CENTRAL
TENSAS PARISH...

AT 1225 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUE TO
TRACK A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS LOCATED NEAR NEWLIGHT MOVING EAST AT 45 MPH.

THE TORNADO WILL BE NEAR...
  LAKE BRUIN AND NEWELLTON BY 1240 PM CDT...
  ST. JOSEPH BY 1245 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR NORTHEAST LOUISIANA AND SOUTHWESTERN
MISSISSIPPI.

&&

LAT...LON 3219 9148 3217 9116 3214 9115 3215 9108
      3213 9103 3209 9108 3206 9107 3206 9109
      3209 9113 3208 9115 3203 9108 3199 9111
      3199 9116 3191 9121 3196 9150
TIME...MOT...LOC 1725Z 277DEG 38KT 3204 9145

$$

COHEN

000 
WWUS54 KJAN 151744
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1244 PM CDT THU OCT 15 2009

LAC107-151800-
/O.CON.KJAN.TO.W.0101.000000T0000Z-091015T1800Z/
TENSAS LA-
1244 PM CDT THU OCT 15 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR CENTRAL
TENSAS PARISH...

AT 1244 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUE TO
TRACK A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS LOCATED NEAR LAKE BRUIN MOVING EAST AT 45 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING PING 
PONG BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR NORTHEAST LOUISIANA AND SOUTHWESTERN
MISSISSIPPI.

&&

LAT...LON 3207 9134 3218 9132 3217 9116 3214 9115
      3215 9108 3213 9104 3209 9108 3206 9107
      3209 9113 3208 9115 3203 9108 3199 9111
      3199 9116 3191 9121 3193 9137 3196 9141
TIME...MOT...LOC 1744Z 277DEG 38KT 3202 9122

$$

COHEN

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 15, 7:44 AM CDT	Severe Thunderstorm Warning	JAN	Morehouse	76 min
Oct 15, 8:47 AM CDT	Tornado Warning	JAN	Morehouse	41 min
Oct 15, 9:24 AM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland	81 min
Oct 15, 10:39 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Madison, Richland, Tensas	66 min
Oct 15, 11:37 AM CDT	Flash Flood Warning	JAN	Franklin, Madison, Richland, Tensas	113 min
Oct 15, 12:09 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Tensas	66 min
Oct 15, 12:39 PM CDT	Severe Thunderstorm Warning	JAN	Madison	56 min
Oct 15, 1:08 PM CDT	Flash Flood Warning	JAN	Madison, Tensas	112 min
Oct 15, 1:31 PM CDT	Flash Flood Warning	JAN	Franklin, Madison, Richland, Tensas	59 min
Oct 15, 2:34 PM CDT	Severe Thunderstorm Warning	JAN	Madison	30 min

Nearby

Tornado Warnings in Louisiana, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.