Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 47, NWS New Orleans, LA

April 4, 2011Jackson County, Mississippi

NWS New Orleans, LA issued this tornado warning at Apr 4, 2011, 8:31 PM CDT for Jackson County, Mississippi. It was in force for 44 min. 2 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 4, 2011, 8:31 PM CDT (01:31 UTC)
Expired: Apr 4, 2011, 9:15 PM CDT
In force: 44 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Jackson County, MS

The radar

The Mobile radar (KMOB), 45 km from the middle of the area, began a volume at 01:31 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 4, 8:40 PM CDT	TSTM WND DMG	5 E Ocean Springs, MS	DAMAGE TO 2 COMMERCIAL BUILDINGS IN FOUNTAINBLEAU. ADDITIONAL DAMAGE TO A FEW HOMES AND SEVERAL TREES DOWN. TIME CORRECTED.
Apr 4, 8:45 PM CDT	TORNADO 1	5 E Ocean Springs, MS	ROOFING PEELED OFF OF A COUPLE METAL COMMERCIAL BUILDINGS IN FOUNTAINBLEAU AREA.WINDOW BLOWN OUT OF TWO HOUSE. LARGE SECTION OF TWO FENCES BLOWN DOWN. SEVERAL MEDIUM TREES BLOWN DOWN AND LARGE TREE LIMBS SNAPPED. DAMAGE PATH APPROXIMATELY 0.1 MILES LONG AND 75

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 4, 5:28 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.5 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: 3275 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 4.7
Supercell composite: 20.4

Open this sounding in Storm Lab

The text

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

473 
WFUS54 KLIX 050131
TORLIX
MSC059-050215-
/O.NEW.KLIX.TO.W.0047.110405T0131Z-110405T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
831 PM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN JACKSON COUNTY IN SOUTHERN MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...ST. MARTIN...PASCAGOULA...OCEAN
  SPRINGS...MOSS POINT...ESCATAWPA...

* UNTIL 915 PM CDT

* AT 826 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ST.
  MARTIN...OR NEAR BILOXI...MOVING EAST AT 55 MPH.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3035 8842 3034 8843 3039 8880 3043 8884
      3043 8887 3059 8887 3064 8841 3034 8840
TIME...MOT...LOC 0131Z 264DEG 48KT 3048 8887

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:00 PM CDT	Tornado Warning	LIX	Pearl River	45 min
Apr 4, 7:42 PM CDT	Tornado Warning	LIX	Hancock	48 min
Apr 4, 7:47 PM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison, Jackson, Pearl River	73 min
Apr 4, 8:04 PM CDT	Tornado Warning	LIX	Harrison	41 min

Nearby

Tornado Warnings in Mississippi, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.