Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 12, NWS New Orleans, LA

January 21, 2017Orleans Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Jan 21, 2017, 5:02 PM CST for Orleans Parish, Louisiana. It was in force for 13 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: Jan 21, 2017, 5:02 PM CST (23:02 UTC)
Expired: Jan 21, 2017, 5:15 PM CST
In force: 13 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Orleans Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 21, 3:29 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.0 hours before the alert went out and 34 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: 1327 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 11.2

Open this sounding in Storm Lab

The text

As transmitted.

822 
WFUS54 KLIX 212302
TORLIX
LAC071-212315-
/O.NEW.KLIX.TO.W.0012.170121T2302Z-170121T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
502 PM CST SAT JAN 21 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Central Orleans Parish in southeastern Louisiana...

* Until 515 PM CST
    
* At 501 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Arabi, or near Chalmette, moving northeast at 25
  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. 

* This dangerous storm will be near...
  East New Orleans around 515 PM CST. 

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 2999 9004 3006 8999 3015 8991 3010 8982
      2998 9000
TIME...MOT...LOC 2301Z 215DEG 23KT 3001 9000 

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

$$

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 20, 10:53 PM CST	Marine Dense Fog Advisory	LIX		4 hr
Jan 20, 11:01 PM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	29 min
Jan 20, 11:15 PM CST	Tornado Warning	LIX	Pointe Coupee, West Feliciana	30 min
Jan 20, 11:43 PM CST	Tornado Warning	LIX	West Feliciana	32 min
Jan 21, 1:06 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	24 min
Jan 21, 1:41 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	34 min
Jan 21, 1:51 AM CST	Special Weather Statement	LIX	Tangipahoa	39 min
Jan 21, 2:14 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Feliciana	46 min
Jan 21, 2:20 AM CST	Tornado Warning	LIX	Livingston, Saint Helena, Tangipahoa	25 min
Jan 21, 2:28 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	32 min
Jan 21, 2:48 AM CST	Tornado Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena	10 min
Jan 21, 2:57 AM CST	Severe Thunderstorm Warning	LIX	Washington	33 min
Jan 21, 2:57 AM CST	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa, Washington	48 min
Jan 21, 3:02 AM CST	Tornado Warning	LIX	Washington	13 min
Jan 21, 3:04 AM CST	Tornado Warning	LIX	Washington	15 min
Jan 21, 3:28 AM CST	Areal Flood Advisory	LIX	East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge	2 hr
Jan 21, 3:37 AM CST	Special Weather Statement	LIX	Saint Helena	38 min
Jan 21, 3:40 AM CST	Small Craft Advisory	LIX		35 hr
Jan 21, 4:45 AM CST	Special Weather Statement	LIX	Ascension, Livingston, Tangipahoa	60 min
Jan 21, 5:00 AM CST	Special Weather Statement	LIX	Washington	30 min
Jan 21, 5:22 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	38 min
Jan 21, 5:24 AM CST	Special Marine Warning	LIX		96 min
Jan 21, 6:08 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Orleans	37 min
Jan 21, 6:38 AM CST	Special Marine Warning	LIX		37 min
Jan 21, 10:58 AM CST	River Flood Warning	LIX	Saint Helena	33 hr
Jan 21, 11:03 AM CST	River Flood Warning	LIX	Saint Tammany	13 days
Jan 21, 3:44 PM CST	Gale Warning	LIX		41 hr
Jan 21, 4:33 PM CST	Special Weather Statement	LIX	Orleans	42 min
Jan 21, 4:51 PM CST	Special Marine Warning	LIX		24 min
Jan 21, 4:54 PM CST	Special Weather Statement	LIX	Saint John the Baptist	36 min
Jan 21, 4:56 PM CST	Severe Thunderstorm Warning	LIX	Saint Charles	19 min
Jan 21, 5:11 PM CST	Tornado Warning	LIX	Saint Charles	7 min
Jan 21, 5:16 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	29 min
Jan 21, 5:20 PM CST	Special Marine Warning	LIX		40 min
Jan 21, 5:42 PM CST	Special Marine Warning	LIX		33 min
Jan 21, 5:47 PM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	28 min
Jan 21, 5:52 PM CST	Special Marine Warning	LIX		38 min

Nearby

Tornado Warnings in Louisiana, 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; the sounding from the Mesonet's radiosonde archive.