Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Mar 17, 2021, 7:17 PM CDT for 5 counties in Mississippi. It was in force for 43 min. 11 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
- Mar 17, 2021, 7:17 PM CDT (00:17 UTC)
- Expired
- Mar 17, 2021, 8:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Chickasaw County, MS, Itawamba County, MS, Lee County, MS, Monroe County, MS, Pontotoc County, MS
The radar
The Columbus AFB radar (KGWX), 26 km from the middle of the area, began a volume at 00:19 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 |
|---|---|---|---|
| Mar 17, 7:25 PM CDT | TORNADO | 5 Sw Okolona, MS | EF0 TORNADO DEVELOPED WEST OF COUNTY RD 410 SOUTHWEST OF OKOLONA. THE TORNADO DAMAGE A BARN AND UPROOTED TREES. |
| Mar 17, 7:30 PM CDT | TSTM WND DMG | 7 S Okolona, MS | LARGE TREE SNAPPED AT THE TRUNK NEAR EGYPT COMMUNITY. |
| Mar 17, 7:31 PM CDT | TORNADO | 3 Wnw Okolona, MS | EF0 TORNADO DEVELOPED NEAR THE INTERSECTION OF HIGHWAY 41 AND CR 413. TORNADO PATH WAS INTERMITTENT AND DAMAGE WAS LIMITED TO TREES. |
| Mar 17, 7:39 PM CDT | TSTM WND GST 60 | New Hamilton, MS | WINDS ESTIMATED AT 60 MPH. FEW POWER OUTAGES IN THE AREA. |
| Mar 17, 7:39 PM CDT | TORNADO | 1 Sw Nettleton, MS | EF0 TORNADO DEVELOPED JUST SOUTHWEST OF NETTLETON IN EXTREME NORTHWEST MONROE COUNTY. PATH WAS INTERMITTENT. MOST OF THE DAMAGE WAS CONFINED TO TREES WITH THE TORNADO LIFTING IN SOUTHEAST LEE COUNTY. |
| Mar 17, 7:42 PM CDT | TSTM WND DMG | Nettleton, MS | SEVERAL TREES DOWN ON A FEW ROADS IN NETTLETON.MAPLE ROAD AND BENTON STREET AND A FEW OTHER ROADS. |
| Mar 17, 7:45 PM CDT | TSTM WND DMG | Ne Nettleton, MS | SEVERAL TREES DOWN BETWEEN NETTLETON AND RICHMOND ON HIGHWAYS 452 AND 1411. |
| Mar 17, 7:45 PM CDT | TSTM WND DMG | Ne Nettleton, MS | SEVERAL TREES DOWN BETWEEN NETTLETON AND RICHMOND ON HIGHWAYS 452 AND 1411. |
| Mar 17, 7:48 PM CDT | TSTM WND DMG | 4 E Verona, MS | SEVERAL TREES DOWN IN RICHMOND. |
| Mar 17, 7:48 PM CDT | TSTM WND DMG | 4 E Verona, MS | SEVERAL TREES DOWN IN RICHMOND |
| Mar 17, 7:48 PM CDT | TSTM WND DMG | Amory, MS | TREES AND POWER LINES DOWN IN AMORY. TIME IS RADAR ESTIMATED. |
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 |
|---|---|---|---|
| Mar 17, 7:07 PM CDT | Tornado Watch | SPC | 3 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 0.3 hours before the alert went out and 173 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
- 959 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.3
The text
As transmitted.
033
WUUS54 KMEG 180017
SVRMEG
MSC017-057-081-095-115-180100-
/O.NEW.KMEG.SV.W.0025.210318T0017Z-210318T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
717 PM CDT Wed Mar 17 2021
The National Weather Service in Memphis has issued a
* Severe Thunderstorm Warning for...
Chickasaw County in northeastern Mississippi...
Southeastern Pontotoc County in northeastern Mississippi...
Southern Itawamba County in northeastern Mississippi...
Southern Lee County in northeastern Mississippi...
Monroe County in northeastern Mississippi...
* Until 800 PM CDT.
* At 717 PM CDT, a severe thunderstorm was located over Trebloc, or 7
miles southeast of Houston, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Amory, Aberdeen, Fulton, Houston, Verona, Okolona, Shannon,
Smithville, Tremont, Prairie, New Salem, New Wren, Trebloc, Houlka,
Evergreen, Nettleton, New Houlka, Hatley, Gattman and Abney.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until midnight CDT for northeastern
Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3367 8850 3368 8872 3381 8872 3381 8893
3375 8893 3375 8895 3413 8908 3427 8819
3375 8825 3374 8833 3372 8833 3368 8837
3369 8839 3367 8842 3366 8850 3365 8851
TIME...MOT...LOC 0017Z 244DEG 30KT 3383 8890
HAIL...<.75IN
WIND...60MPH
$$2 follow-up statements
058
WWUS54 KMEG 180046
SVSMEG
Severe Weather Statement
National Weather Service Memphis TN
746 PM CDT Wed Mar 17 2021
MSC017-115-180056-
/O.CAN.KMEG.SV.W.0025.000000T0000Z-210318T0100Z/
Chickasaw MS-Pontotoc MS-
746 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR CHICKASAW AND SOUTHEASTERN
PONTOTOC COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until midnight CDT for northeastern
Mississippi.
LAT...LON 3374 8847 3381 8861 3398 8872 3407 8872
3408 8878 3415 8882 3417 8883 3427 8819
3375 8825 3374 8833 3372 8833
TIME...MOT...LOC 0046Z 244DEG 30KT 3394 8864
$$
MSC057-081-095-180100-
/O.CON.KMEG.SV.W.0025.000000T0000Z-210318T0100Z/
Itawamba MS-Lee MS-Monroe MS-
746 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHERN ITAWAMBA...SOUTHERN LEE AND MONROE COUNTIES...
At 746 PM CDT, a severe thunderstorm was located over New Wren, or 8
miles southeast of Okolona, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Amory, Aberdeen, Fulton, Verona, Shannon, Smithville, Tremont, New
Salem, New Wren, Evergreen, Nettleton, Hatley, Gattman, Abney,
Quincy, Turon, Wise Gap, Wren, Old Union and Sipsey Fork.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until midnight CDT for northeastern
Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.
&&
LAT...LON 3374 8847 3381 8861 3398 8872 3407 8872
3408 8878 3415 8882 3417 8883 3427 8819
3375 8825 3374 8833 3372 8833
TIME...MOT...LOC 0046Z 244DEG 30KT 3394 8864
HAIL...<.75IN
WIND...60MPH
$$624
WWUS54 KMEG 180059
SVSMEG
Severe Weather Statement
National Weather Service Memphis TN
759 PM CDT Wed Mar 17 2021
MSC057-081-095-180108-
/O.EXP.KMEG.SV.W.0025.000000T0000Z-210318T0100Z/
Itawamba MS-Lee MS-Monroe MS-
759 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ITAWAMBA...SOUTHERN
LEE AND MONROE COUNTIES WILL EXPIRE AT 800 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Tornado Watch remains in effect until midnight CDT for northeastern
Mississippi.
Remember, a Severe Thunderstorm Warning still remains in effect for
Lee and Itawamba Counties until 830 PM CDT.
LAT...LON 3374 8847 3381 8861 3398 8872 3407 8872
3408 8878 3415 8882 3417 8883 3427 8819
3375 8825 3374 8833 3372 8833
TIME...MOT...LOC 0058Z 244DEG 30KT 3398 8855
$$The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 7:35 PM CDT | Flash Flood Warning | MEG | Itawamba | 2 hr |
| Mar 17, 7:38 PM CDT | Tornado Warning | MEG | Itawamba, Lee, Monroe | 10 min |
| Mar 17, 7:44 PM CDT | Severe Thunderstorm Warning | MEG | Itawamba, Lee, Monroe, Prentiss, Tishomingo | 31 min |
| Mar 17, 8:24 PM CDT | Areal Flood Advisory | MEG | Chickasaw, Itawamba, Lee, Monroe, Pontotoc | 89 min |
| Mar 17, 8:45 PM CDT | Flash Flood Warning | MEG | Itawamba, Prentiss, Tishomingo | 69 min |
| Mar 17, 9:10 PM CDT | River Flood Warning | MEG | Lowndes, Monroe | 4 days |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2021Every severe thunderstorm warning in 2021
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.