Alert archive / Tennessee / Tornado Watches in 2000
Tornado Watch 189
The Storm Prediction Center issued this tornado watch at Apr 20, 2000, 5:15 PM CDT for 37 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2000, 5:15 PM CDT (22:15 UTC)
- Expired
- Apr 20, 2000, 9:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Bedford County, TN, Bledsoe County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 70 km from the middle of the area, began a volume at 22:16 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
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 5:27 PM CDT | Severe Thunderstorm Warning | OHX | Maury | 48 min |
| Apr 20, 5:34 PM CDT | Severe Thunderstorm Warning | OHX | Macon, Sumner, Trousdale | 41 min |
| Apr 20, 5:39 PM CDT | Tornado Warning | OHX | Lewis, Maury | 51 min |
| Apr 20, 5:49 PM CDT | Tornado Warning | OHX | Davidson, Rutherford, Williamson | 26 min |
| Apr 20, 6:19 PM CDT | Tornado Warning | OHX | Wilson | 26 min |
| Apr 20, 6:24 PM CDT | Severe Thunderstorm Warning | OHX | Marshall | 21 min |
| Apr 20, 6:24 PM CDT | Tornado Warning | OHX | Trousdale, Wilson | 36 min |
| Apr 20, 6:24 PM CDT | Tornado Warning | OHX | Macon | 36 min |
| Apr 20, 6:37 PM CDT | Tornado Warning | OHX | DeKalb | 23 min |
| Apr 20, 6:41 PM CDT | Tornado Warning | OHX | Bedford | 49 min |
| Apr 20, 6:54 PM CDT | Tornado Warning | OHX | Putnam | 51 min |
| Apr 20, 7:09 PM CDT | Tornado Warning | OHX | Coffee | 51 min |
| Apr 20, 7:15 PM CDT | Severe Thunderstorm Warning | OHX | Marshall | 15 min |
| Apr 20, 7:31 PM CDT | Severe Thunderstorm Warning | OHX | Bedford | 44 min |
| Apr 20, 7:36 PM CDT | Severe Thunderstorm Warning | OHX | Overton | 39 min |
| Apr 20, 7:41 PM CDT | Tornado Warning | OHX | Warren | 34 min |
| Apr 20, 7:53 PM CDT | Tornado Warning | OHX | Fentress | 37 min |
| Apr 20, 7:58 PM CDT | Severe Thunderstorm Warning | OHX | Coffee | 32 min |
| Apr 20, 8:08 PM CDT | Severe Thunderstorm Warning | MRX | Bledsoe, Sequatchie | 62 min |
| Apr 20, 8:11 PM CDT | Tornado Warning | OHX | Coffee, Grundy | 34 min |
| Apr 20, 8:12 PM CDT | Severe Thunderstorm Warning | MRX | Morgan, Scott | 28 min |
| Apr 20, 8:16 PM CDT | Tornado Warning | OHX | Van Buren | 14 min |
| Apr 20, 8:23 PM CDT | Severe Thunderstorm Warning | OHX | Fentress | 37 min |
| Apr 20, 8:32 PM CDT | Severe Thunderstorm Warning | OHX | Franklin | 28 min |
| Apr 20, 8:36 PM CDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 44 min |
| Apr 20, 8:44 PM CDT | Tornado Warning | MRX | Sequatchie | 46 min |
| Apr 20, 8:45 PM CDT | Tornado Warning | MRX | Campbell, Scott | 30 min |
| Apr 20, 8:48 PM CDT | Severe Thunderstorm Warning | MRX | Marion | 62 min |
| Apr 20, 8:50 PM CDT | Severe Thunderstorm Warning | OHX | Grundy | 25 min |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 10.3 hours before the alert went out and 57 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
- 1180 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 319 m²/s²
- 0-3 km storm-relative helicity
- 324 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
339 WWUS9 KMKC 202154 SEL9 SEL9 MKC WW 202154 TNZ000-210200- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 189 STORM PREDICTION CENTER NORMAN OK 454 PM CDT THU APR 20 2000 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF MIDDLE TENNESSEE EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 515 PM UNTIL 900 PM CDT. TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES SOUTH OF NASHVILLE TENNESSEE TO 50 MILES NORTH NORTHWEST OF CROSSVILLE TENNESSEE. 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 187...WW 188... DISCUSSION...THUNDERSTORMS HAVE INCREASED OVER MIDDLE TN...WITH SOME POTENTIAL FOR SUPERCELLS GIVEN STRONG DEEP LAYER SHEAR. ACTIVITY SHOULD BEGIN TO DIMINISH LATER THIS EVENING AS UPPER SYSTEM MOVES BY THE AREA. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24045. ...VESCIO 363,0840 345,0852 345,0880 363,0864
Nearby
Tornado Watches in Tennessee, 2000Every tornado watch in 2000
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.