Alert archive / Mississippi / Tornado Watches in 2016
Tornado Watch 505
The Storm Prediction Center issued this tornado watch at Nov 29, 2016, 3:48 PM CST for 18 counties in Mississippi; 6 counties in Tennessee. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 29, 2016, 3:48 PM CST (21:48 UTC)
- Expired
- Nov 29, 2016, 11:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 24 counties
Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Chester County, TN, Hardeman County, TN, Hardin County, TN, Lawrence County, TN, McNairy County, TN, Wayne County, TN
The radar
The Memphis radar (KNQA), 107 km from the middle of the area, began a volume at 21:48 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 70%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 4:14 PM CST | Severe Thunderstorm Warning | MEG | Calhoun, Tallahatchie, Yalobusha | 46 min |
| Nov 29, 4:56 PM CST | Severe Thunderstorm Warning | MEG | Calhoun, Chickasaw, Pontotoc | 49 min |
| Nov 29, 5:08 PM CST | Tornado Warning | MEG | Calhoun, Chickasaw, Pontotoc | 37 min |
| Nov 29, 5:40 PM CST | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Pontotoc | 50 min |
| Nov 29, 5:47 PM CST | Severe Thunderstorm Warning | MEG | Calhoun, Yalobusha | 43 min |
| Nov 29, 5:53 PM CST | Flash Flood Warning | MEG | Calhoun, Chickasaw, Lafayette, Pontotoc, Yalobusha | 3 hr |
| Nov 29, 6:01 PM CST | Severe Thunderstorm Warning | MEG | Chickasaw, Monroe | 44 min |
| Nov 29, 6:16 PM CST | Tornado Warning | MEG | Monroe | 44 min |
| Nov 29, 6:23 PM CST | Severe Thunderstorm Warning | MEG | Calhoun, Chickasaw, Pontotoc | 52 min |
| Nov 29, 6:29 PM CST | Severe Thunderstorm Warning | MEG | Itawamba, Tishomingo | 31 min |
| Nov 29, 6:49 PM CST | Flash Flood Warning | MEG | Alcorn, Benton, Chickasaw, Itawamba, Lee, Monroe and 5 more | 6 hr |
| Nov 29, 7:01 PM CST | Severe Thunderstorm Warning | MEG | Monroe | 12 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
Little Rock, AR (KBYH), launched 12:00Z, 9.8 hours before the alert went out and 68 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1496 m above ground
- 0-6 km bulk shear
- 92 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 338 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
757 WWUS20 KWNS 292146 SEL5 SPC WW 292146 ALZ000-MSZ000-TNZ000-300500- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 505 NWS STORM PREDICTION CENTER NORMAN OK 350 PM CST TUE NOV 29 2016 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF EXTREME NORTHWEST ALABAMA NORTHEAST MISSISSIPPI A SMALL PART OF WESTERN AND SOUTHERN MIDDLE TENNESSEE * EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 350 PM UNTIL 1100 PM CST. * PRIMARY THREATS INCLUDE... A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE SUMMARY...SCATTERED SUPERCELLS IN MISSISSIPPI WILL SPREAD NORTHEASTWARD THROUGH THE EVENING AND LIKELY BEGIN TO AFFECT AREAS AS FAR NORTHEAST AS ALABAMA AND TENNESSEE BY ABOUT 6-7 PM CST. AS THE STORM ENVIRONMENT BECOMES MORE FAVORABLE FOR ROTATING STORMS... THERE WILL BE THE POTENTIAL FOR A COUPLE OF STRONG TORNADOES (ESPECIALLY ACROSS NORTHEAST MISSISSIPPI)...AS WELL AS LARGE HAIL AND DAMAGING WINDS THROUGH EARLY TONIGHT. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF OXFORD MS TO 90 MILES NORTH NORTHEAST OF TUPELO MS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 504... AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24045. ...THOMPSON
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 28, 6:36 PM CST | Mesoscale Discussion | SPC | Clarke, Covington, Forrest, George, Greene, Jasper and 11 more | 2 hr |
| Nov 28, 8:39 PM CST | Mesoscale Discussion | SPC | Amite, Clarke, Covington, Forrest, George, Greene and 12 more | 96 min |
| Nov 28, 11:38 PM CST | Mesoscale Discussion | SPC | Forrest, George, Greene, Lamar, Marion, Pearl River and 4 more | 3 hr |
| Nov 29, 12:38 PM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Copiah, Covington, Franklin and 18 more | 2 hr |
| Nov 29, 1:48 PM CST | Tornado Watch | SPC | Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 27 more | 7 hr |
| Nov 29, 3:08 PM CST | Mesoscale Discussion | SPC | Alcorn, Benton, Bolivar, Calhoun, Chickasaw, Clay and 17 more | 2 hr |
| Nov 29, 4:20 PM CST | Mesoscale Discussion | SPC | Attala, Carroll, Choctaw, Claiborne, Copiah, Hinds and 17 more | 55 min |
| Nov 29, 5:24 PM CST | Mesoscale Discussion | SPC | Itawamba, Tishomingo | 96 min |
Nearby
Tornado Watches in Mississippi, 2016Tornado Watches in Tennessee, 2016Every tornado watch in 2016
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; radar from the NEXRAD Level II archive.