Alert archive / Mississippi / Tornado Warnings in 2011
Tornado Warning 40, NWS Jackson, MS
NWS Jackson, MS issued this tornado warning at Apr 4, 2011, 7:09 PM CDT for Forrest County, Jones County, Lamar County, Mississippi. It was in force for 27 min. 1 report 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, 7:09 PM CDT (00:09 UTC)
- Expired
- Apr 4, 2011, 7:36 PM CDT
- In force
- 27 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
Counties Forrest County, MS, Jones County, MS, Lamar County, MS
The radar
The Mobile radar (KMOB), 115 km from the middle of the area, began a volume at 00:12 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, 7:20 PM CDT | TSTM WND DMG | 5 Wnw Purvis, MS | NUMEROUS REPORTS OF TREES OVER POWERLINES ACROSS CENTRAL AND SOUTHERN PORTIONS OF COUNTY. |
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, 0.2 hours before the alert went out and 127 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
833
WFUS54 KJAN 050009
TORJAN
MSC035-067-073-050100-
/O.NEW.KJAN.TO.W.0040.110405T0009Z-110405T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
709 PM CDT MON APR 4 2011
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
* TORNADO WARNING FOR...
NORTHERN FORREST COUNTY IN SOUTHEAST MISSISSIPPI...
THIS INCLUDES THE CITIES OF...PETAL...HATTIESBURG...
SOUTHEASTERN JONES COUNTY IN SOUTHEAST MISSISSIPPI...
CENTRAL LAMAR COUNTY IN SOUTHEAST MISSISSIPPI...
THIS INCLUDES THE CITY OF WEST HATTIESBURG...
* UNTIL 800 PM CDT
* AT 710 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES WEST OF
PURVIS MOVING NORTHEAST AT 55 MPH.
* THE TORNADO WILL BE NEAR...
WEST HATTIESBURG AND MCLAURIN BY 720 PM CDT...
HATTIESBURG...PETAL AND MCLAURIN BY 725 PM CDT...
SUNRISE BY 730 PM CDT...
MACEDONIA BY 735 PM CDT...
OVETT BY 745 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEASTERN MISSISSIPPI.
&&
LAT...LON 3107 8950 3123 8959 3160 8893 3144 8892
3143 8893 3143 8913 3118 8914
TIME...MOT...LOC 0010Z 240DEG 48KT 3119 8946
$$
DHB2 follow-up statements
795
WWUS54 KJAN 050024
SVSJAN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
724 PM CDT MON APR 4 2011
MSC073-050034-
/O.CAN.KJAN.TO.W.0040.000000T0000Z-110405T0100Z/
LAMAR MS-
724 PM CDT MON APR 4 2011
...THE TORNADO WARNING FOR CENTRAL LAMAR COUNTY IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEASTERN MISSISSIPPI.
LAT...LON 3112 8934 3133 8934 3160 8893 3144 8892
3143 8893 3143 8913 3118 8914
TIME...MOT...LOC 0024Z 240DEG 48KT 3128 8926
$$
MSC035-067-050100-
/O.CON.KJAN.TO.W.0040.000000T0000Z-110405T0100Z/
JONES MS-FORREST MS-
724 PM CDT MON APR 4 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR NORTHERN
FORREST AND SOUTHEASTERN JONES COUNTIES...
AT 724 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUE TO
TRACK A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS LOCATED NEAR HATTIESBURG MOVING NORTHEAST AT 55 MPH.
THE TORNADO WILL BE NEAR...
SUNRISE BY 730 PM CDT...
MACEDONIA BY 735 PM CDT...
OVETT BY 745 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEASTERN MISSISSIPPI.
&&
LAT...LON 3112 8934 3133 8934 3160 8893 3144 8892
3143 8893 3143 8913 3118 8914
TIME...MOT...LOC 0024Z 240DEG 48KT 3128 8926
$$
DHB006
WWUS54 KJAN 050036
SVSJAN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
736 PM CDT MON APR 4 2011
MSC035-067-050046-
/O.CAN.KJAN.TO.W.0040.000000T0000Z-110405T0100Z/
JONES MS-FORREST MS-
736 PM CDT MON APR 4 2011
...THE TORNADO WARNING FOR NORTHERN FORREST AND SOUTHEASTERN JONES
COUNTIES IS CANCELLED...
THE STORM THAT PROMPTED THE TORNADO WARNING HAS WEAKENED.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEASTERN MISSISSIPPI.
LAT...LON 3112 8934 3133 8934 3160 8893 3144 8892
3143 8893 3143 8913 3118 8914
TIME...MOT...LOC 0036Z 240DEG 48KT 3135 8909
$$
DHBThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 7:35 PM CDT | Special Weather Statement | JAN | Clarke | 30 min |
| Apr 4, 8:33 PM CDT | River Flood Warning | JAN | Lowndes | 48 hr |
| Apr 4, 9:15 PM CDT | Areal Flood Warning | JAN | Lowndes | 12 hr |
Nearby
Tornado Warnings in Mississippi, 2011Every tornado warning in 2011Tornadoes 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.