Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 26, NWS New Orleans, LA

June 30, 2003Saint John the Baptist Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Jun 30, 2003, 12:31 PM CDT for Saint John the Baptist Parish, Louisiana. It was in force for 29 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: Jun 30, 2003, 12:31 PM CDT (17:31 UTC)
Expired: Jun 30, 2003, 1:00 PM CDT
In force: 29 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

County Saint John the Baptist 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
Jun 30, 6:55 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.5 hours before the alert went out and 70 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: 124 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 568 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

136 
WFUS54 KLIX 301731
TORNEW
LAC095-301800-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1231 PM CDT MON JUN 30 2003

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  ST. JOHN THE BAPTIST PARISH IN SOUTHEAST LOUISIANA

* UNTIL 100 PM CDT

* AT 1228 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 12 MILES NORTH   
  OF METAIRIE OVER LAKE PONTCHARTRAIN...MOVING NORTHWEST AT 25 MPH.

SEEK SHELTER ON THE LOWEST FLOOR OF A BUILDING IN AN INTERIOR HALLWAY
OR ROOM SUCH AS A CLOSET OR BATHROOM.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 3014 9045 3017 9049 3027 9042 3028 9030
          3019 9042

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:50 AM CDT	Tornado Warning	LIX	Plaquemines	25 min
Jun 30, 10:07 AM CDT	Flash Flood Warning	LIX	Assumption, Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard and 4 more	4 hr
Jun 30, 10:46 AM CDT	Tornado Warning	LIX	Saint Bernard	44 min
Jun 30, 11:54 AM CDT	Tornado Warning	LIX	Saint Bernard	31 min
Jun 30, 12:43 PM CDT	Tornado Warning	LIX	Orleans	32 min
Jun 30, 1:09 PM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
Jun 30, 1:17 PM CDT	Tornado Warning	LIX	Saint Tammany	28 min
Jun 30, 5:11 PM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa, Washington	4 hr

Nearby

Tornado Warnings in Louisiana, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.