Alert archive / Mississippi / Tornado Watches in 2013
Tornado Watch 2
The Storm Prediction Center issued this tornado watch at Jan 10, 2013, 6:14 AM CST for 23 parishes in Louisiana; 29 counties in Mississippi. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 10, 2013, 6:14 AM CST (12:14 UTC)
- Expired
- Jan 10, 2013, 5:26 PM CST
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 52 counties
Ascension Parish, LA, Assumption Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Pearl River County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wilkinson County, MS
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 6:45 AM CST | Tornado Warning | JAN | Concordia | 45 min |
| Jan 10, 7:36 AM CST | Severe Thunderstorm Warning | JAN | Claiborne, Franklin, Jefferson | 54 min |
| Jan 10, 7:46 AM CST | Tornado Warning | LIX | East Baton Rouge, Iberville | 29 min |
| Jan 10, 7:50 AM CST | Tornado Warning | LIX | Ascension, East Baton Rouge | 25 min |
| Jan 10, 8:14 AM CST | Severe Thunderstorm Warning | JAN | Copiah, Hinds | 61 min |
| Jan 10, 8:15 AM CST | Tornado Warning | LIX | Ascension, East Baton Rouge, Livingston | 30 min |
| Jan 10, 8:17 AM CST | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Livingston, Saint James and 1 more | 5 hr |
| Jan 10, 8:54 AM CST | Flash Flood Warning | LIX | Assumption, Lafourche, Terrebonne | 4 hr |
| Jan 10, 9:19 AM CST | Flash Flood Warning | JAN | Claiborne, Copiah, Franklin, Jefferson, Lincoln | 116 min |
| Jan 10, 9:30 AM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 30 min |
| Jan 10, 9:40 AM CST | Severe Thunderstorm Warning | LIX | Tangipahoa | 15 min |
| Jan 10, 9:46 AM CST | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Tensas | 3 hr |
| Jan 10, 10:00 AM CST | Tornado Warning | LIX | Lafourche, Terrebonne | 30 min |
| Jan 10, 10:09 AM CST | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Plaquemines | 66 min |
| Jan 10, 10:50 AM CST | Flash Flood Warning | LIX | Lafourche, Saint Charles, Saint John the Baptist | 115 min |
| Jan 10, 11:11 AM CST | Flash Flood Warning | JAN | Claiborne, Copiah, Franklin, Jefferson, Lincoln | 2 hr |
| Jan 10, 11:14 AM CST | Severe Thunderstorm Warning | LIX | Walthall | 16 min |
| Jan 10, 11:18 AM CST | Tornado Warning | LIX | Plaquemines, Saint Bernard | 27 min |
| Jan 10, 12:15 PM CST | Flash Flood Warning | JAN | Marion | 3 hr |
| Jan 10, 2:16 PM CST | Severe Thunderstorm Warning | JAN | Forrest, Lamar | 44 min |
| Jan 10, 2:34 PM CST | Severe Thunderstorm Warning | JAN | Covington, Jones | 56 min |
| Jan 10, 3:17 PM CST | Tornado Warning | JAN | Jones | 43 min |
| Jan 10, 3:51 PM CST | Tornado Warning | JAN | Clarke, Lauderdale | 54 min |
| Jan 10, 4:03 PM CST | Tornado Warning | JAN | Clarke, Jasper, Jones | 42 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 0.2 hours before the alert went out and 100 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.
- Mixed-layer CAPE
- 581 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 442 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 313 m²/s²
- 0-3 km storm-relative helicity
- 334 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
820
WWUS20 KWNS 101216
SEL2
SPC WW 101216
LAZ000-MSZ000-CWZ000-102000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 2
NWS STORM PREDICTION CENTER NORMAN OK
615 AM CST THU JAN 10 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEAST LOUISIANA
SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 615 AM UNTIL
200 PM CST.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF PINE
BELT MISSISSIPPI TO 45 MILES SOUTH OF HOUMA LOUISIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 1...
DISCUSSION...SSW-NNE LA SQLN EXPECTED TO CONTINUE MOVING GENERALLY
ENEWD /WITH FORWARD PROPAGATION FOSTERED BY ESELY LOW-LVL
FLOW/...WHILE DEVELOPING NNEWD...AS LOW WAA/MOISTURE TRANSPORT
CONTINUE TO ITS EAST. GRAZING INFLUENCE OF HEIGHT FALLS/UPR
DIFLUENCE ASSOCIATED NEWD EJECTION OF TX UPR VORT ALSO MAY ASSIST
CONVECTIVE SYSTEM STRENGTH/DURATION. CHARACTER OF LOW-LVL HODOGRAPHS
AND AVAILABILITY OF SEASONABLY RICH LOW-LVL MOISTURE SUGGEST
CONTINUED RISK FOR EMBEDDED LEWPS/CIRCULATIONS...SOME POSSIBLY WITH
DMGG WIND AND TORNADOES /SEE MCD 6/.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 22035.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 9, 6:18 PM CST | Mesoscale Discussion | SPC | Assumption, Iberia, Jefferson, Lafourche, Orleans, Plaquemines and 5 more | 117 min |
| Jan 10, 4:05 AM CST | Mesoscale Discussion | SPC | Acadia, Avoyelles, Concordia, Evangeline, Iberia, Iberville and 7 more | 85 min |
| Jan 10, 4:31 AM CST | Tornado Watch | SPC | Acadia, Ascension, Assumption, Avoyelles, Catahoula, Concordia and 16 more | 6 hr |
| Jan 10, 5:47 AM CST | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 4 more | 58 min |
| Jan 10, 7:36 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Jefferson, Lafourche and 12 more | 84 min |
| Jan 10, 11:35 AM CST | Mesoscale Discussion | SPC | Orleans, Plaquemines, Saint Bernard | 85 min |
| Jan 10, 5:40 PM CST | Mesoscale Discussion | SPC | Tunica | 2 hr |
Nearby
Tornado Watches in Mississippi, 2013Tornado Watches in Louisiana, 2013Every tornado watch in 2013
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.