Alert archive / Mississippi / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 254
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2001, 1:15 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2001, 1:15 PM CDT (18:15 UTC)
- Expired
- May 20, 2001, 6:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 42 counties
Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN
The radar
The Memphis radar (KNQA), 7 km from the middle of the area, began a volume at 18:18 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.
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 1:29 PM CDT | Severe Thunderstorm Warning | MEG | Cross, Poinsett, St. Francis | 46 min |
| May 20, 1:29 PM CDT | Severe Thunderstorm Warning | MEG | Craighead | 46 min |
| May 20, 2:21 PM CDT | Severe Thunderstorm Warning | MEG | St. Francis | 39 min |
| May 20, 2:56 PM CDT | Severe Thunderstorm Warning | MEG | DeSoto | 49 min |
| May 20, 3:11 PM CDT | Severe Thunderstorm Warning | MEG | Tunica | 49 min |
| May 20, 3:16 PM CDT | Severe Thunderstorm Warning | MEG | Lauderdale | 44 min |
| May 20, 3:21 PM CDT | Severe Thunderstorm Warning | MEG | Calhoun, Chickasaw, Pontotoc | 39 min |
| May 20, 3:38 PM CDT | Severe Thunderstorm Warning | MEG | Fayette | 52 min |
| May 20, 3:43 PM CDT | Severe Thunderstorm Warning | MEG | DeSoto, Marshall | 47 min |
| May 20, 3:56 PM CDT | Severe Thunderstorm Warning | MEG | Pontotoc | 49 min |
| May 20, 4:08 PM CDT | Severe Thunderstorm Warning | MEG | Tate | 37 min |
| May 20, 4:16 PM CDT | Severe Thunderstorm Warning | MEG | Lafayette, Panola | 29 min |
| May 20, 4:44 PM CDT | Severe Thunderstorm Warning | MEG | Lafayette | 46 min |
| May 20, 4:54 PM CDT | Severe Thunderstorm Warning | MEG | Union | 51 min |
| May 20, 5:29 PM CDT | Severe Thunderstorm Warning | MEG | Itawamba, Lee | 46 min |
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 6.3 hours before the alert went out and 62 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
- 106 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1263 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 6:00 PM CDT | Tornado Watch | SPC | Arkansas, Benton, Carroll, Clark, Cleburne, Cleveland and 38 more | 5 hr |
| May 20, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Alcorn, Itawamba, Lee, Prentiss, Tishomingo | 4 hr |
| May 20, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | Vernon | 4 hr |
Nearby
Severe Thunderstorm Watches in Mississippi, 2001Severe Thunderstorm Watches in Tennessee, 2001Severe Thunderstorm Watches in Arkansas, 2001Every severe thunderstorm watch in 2001
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.