10 thunderstorm wind, 2 hail, 1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Nashville, TN wrote its last area forecast discussion before the first event at Mar 20, 10:00 AM CST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1000 AM CST SAT MAR 20 2004
ELEVATED CONVECTION FIRING ACROSS SOUTHERN ILLINOIS AND SOUTHWEST
INDIANA AT 1530Z IN RESPONSE TO WARM ADVECTION OUT AHEAD OF COLD
FRONT. NEWLY DEVELOPED CONVECTION FIRING IN SOUTHEAST MISSOURI.
AIRMASS UNSTABLE THIS MORNING ACROSS EASTERN OKLAHOMA INTO SOUTHERN
MISSOURI EASTWARD THROUGH ARKANSAS INTO WESTERN TENNESSEE.
SURFACE BASED LIS AT OR BELOW MINUS 5 THIS AREA.
EXPECT THIS ACTIVITY TO CONTINUE TO WORK EASTWARD AS STRONG COLD
FRONT MOVES INTO THE AREA. SOME STORMS COULD BE SEVERE IN MID STATE
THIS AFTERNOON AND EARLY EVENING AND HAVE UPDATED HWO TO REFLECT
THIS. MAIN CONCERN WOULD BE FOR LARGE HAIL AND DOWNBURST WINDS.
IN TERMS OF TIMING EXPECT STORMS TO REACH LAND BETWEEN THE LAKES...
NORTHWEST MIDDLE BETWEEN 1 AND 2 PM.
700 TO 500 MB LAPSE RATE 8.0 DEGC/KM OFF BNA 12Z RAOB. STEEP MID LEVEL
LAPSE RATES. MILLERS TOTAL TOTALS AT 58.
WILL UPDATE FORECAST MAINLY FOR WORDING AS TEMPS ARE ON TRACK AND
THE STORMS ARE ON THE WAY.
NATIONAL WEATHER SERVICE OLD HICKORY, TN. THE
FOLLOWING DATA WAS PROCESSED FROM THE BNA SOUNDING 12Z 03/20/04
BNA
STABILITY
VIL OF THE DAY 31
500 MB TEMP: -18.7
400 MB TEMP: -29.7
SHOWALTER-INDEX -3
TROPOPAUSE (MB) 199
JJ GEORGES K-INDEX 33
LAPSE RATE (DEGC/KM)
700 TO 500 MB 8.0
MILLERS TOTAL TOTALS 58
VERTICAL TOTALS 30
CROSS TOTALS 28
THICKNESSES (METERS)
1000 TO 925 665
1000 TO 850 (1300) 1381
1000 TO 700 (2840) 2971
1000 TO 500 (5400) 5583
850 TO 700 (1540) 1590
700MB TEMP 2.2
700MB WIND 260/27
MEAN WIND (DEGS/KTS)
SURFACE TO 5000 FT 240/34
5000 FT TO 10000 FT 255/33
HEIGHT (KFT MSL)
-20 ISOTHERM 19.6
.BNA WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
BOYD
01HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NASHVILLE TN 839 AM CST SAT MAR 20 2004 TNZ005>011-022>034-056>066-075-077>080-093>095-211130- BEDFORD-BENTON-CANNON-CHEATHAM-CLAY-COFFEE-CUMBERLAND-DAVIDSON- DEKALB-DICKSON-FENTRESS-GILES-GRUNDY-HICKMAN-HOUSTON-HUMPHREYS- JACKSON-LAWRENCE-LEWIS-MACON-MARSHALL-MAURY-MONTGOMERY-OVERTON-PERRY- PICKETT-PUTNAM-ROBERTSON-RUTHERFORD-SMITH-STEWART-SUMNER-TROUSDALE- VAN BUREN-WARREN-WAYNE-WHITE-WILLIAMSON-WILSON- 839 AM CST SAT MAR 20 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT RAIN SHOWERS AND THUNDERSTORMS ARE LIKELY...SOME POSSIBLY SEVERE THIS AFTERNOON AND EARLY TONIGHT. PRIMARY THREAT WILL BE DOWNBURST WINDS AND HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND TONIGHT. BOYD 01
The national radar mosaic for the moment the first event began.
10 thunderstorm wind, 2 hail, 1 flash flood. Local standard time, as filed.
TDOT reported trees down on Sango Drive, Bagwell Road and South Woodson Rd.
Electric company reported a tree down on a powerline on U.S. Hwy 64, just south of Camden.
EMA reported a tree down in the southern part of Gallatin.
Street flooding was reported at I-65 interchange at Long Hollow Pike.
Trees and telephone lines were down in Brentwood and Franklin.
TDOT reported trees down at Albert Fentress and Walden Roads.
EMA reported a few trees down nearAshland City.
Nickel size hail reported by the public.
Dime to penny size hail reported near Hickory Hollow Mall in Antioch.
Trees were blown down.
Davidson County OEM reported trees and power lines were down around the county.
Trees were blown down.
Tin roof torn off a barn at Christiana.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2004Every state in 2004This day in weather historyWarnings in Tennessee, March 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5389544, 5389545, 5389598, 5389543, 5389541, 5389546, 5389597, 5389540, 5389542, 5389538, 5389539, 5389537, 5389599.