Tornadoes · United States · Mississippi · 1997

F1 tornado, Saucier, Mississippi, November 21, 1997

This F1 tornado ran 0.3 miles across Harrison County on November 21, 1997, touching down at 3:25 PM CST and reaching 30 yards wide. It killed nobody, and did $50,000 of property damage.

The rating scale

Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  1. F040 to 72 mph

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F173 to 112 mphthis tornado

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2113 to 157 mph

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. F3158 to 206 mph

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. F4207 to 260 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. F5261 to 318 mph

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating
F1
Date
November 21, 1997
Touchdown
3:25 PM CST (21:25 UTC)
Path length
0.3 miles (0.5 km)
Path width
30 yards (27 m)
Deaths
0
Injuries
0
Property damage
$50,000
County
Harrison County
Touchdown point
30.580, -89.200
Lift-off point
30.580, -89.200
Record number
1133

What the Weather Service recorded

A severe thunderstorm moved out of St. Tammany Parish, Louisiana into extreme south Mississippi. Several short lived tornadoes touched down as it crossed Pearl River, Hancock, and Harrison Counties. Near Nicholson, a tornado touched down near Nicholson, moving through a mobile home park and also passing across the Mississippi Visitors Center on Interstate Highway 59. Damage path was estimated at approximately four miles, due to lack of ground access in Pearl River drainage area to the west of Nicholson. Preliminary reports from Pearl River County and state officials indicated that 3 single family homes were destroyed and 18 others heavily damaged; and 21 mobile homes were destroyed and 8 others heavily damaged. Several car windows were blown out when the tornado passed through the Visitors Center. One person was injured in the mobile home park and another person suffered minor injuries in a nearby subdivision when their auto was hit by falling trees and limbs. Large hail was also reported by the Sheriffs Office in McNeil. Two addtional tornado touch-downs were reported in north Hancock County and north Harrison County as the severe thunderstorm moved northeast. In north Hancock County, civil defense reported two homes were damaged along with two mobile homes when a tornado touched down in a rural area. In north Harrison County, a tornado damaged a convenience store along with heavily damaging a couple of mobile homes. The tornado path lengths in Hancock and Harrison Counties were estimated from damage reports.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

42 minutes of warning. NWS LIX issued a tornado warning for this county at 20:43 UTC, 42 minutes before the tornado touched down, in force until 21:45 UTC.

Issued (UTC)ExpiredProductOffice
20:43 UTC21:45 UTCTornado WarningLIX
21:46 UTC22:30 UTCTornado WarningLIX

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a Slight Risk. The outlook in force was issued at 10:59 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Slidell Radar S, LA (KSIL), 12:00Z

9.4 hours before the tornado, 60 km from the path. November 21, 1997.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 1997-11-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 20 joules per kilogram, CIN -114, lifted condensation level 981 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 1997-11-21The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 192 square meters per square second, 0 to 6 km bulk shear 52 knots.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
20 J/kg
Mixed-layer CIN
-114 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
981 m above ground
0-6 km bulk shear
52 kt
0-1 km bulk shear
25 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
3.4 K/km

Open this sounding in Storm Lab

Slidell Radar S, LA (KSIL), 00:00Z

2.6 hours after it, 60 km from the path. November 22, 1997.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 1997-11-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1557 joules per kilogram, CIN -8, lifted condensation level 793 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 1997-11-22The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 220 square meters per square second, 0 to 6 km bulk shear 51 knots.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
1557 J/kg
Mixed-layer CIN
-8 J/kg
Surface CAPE
2050 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
51 kt
0-1 km bulk shear
27 kt
0-1 km storm-relative helicity
220 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
2.6
Supercell composite
10.9
0-3 km lapse rate
5.7 K/km

Open this sounding in Storm Lab

The radar

The Mobile radar (KMOB), 93 km away, was scanning. The volume nearest the touchdown began at 21:25 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

This ground now

The live radar over the trackEvery 1997 tornado in MississippiEvery tornado in Mississippi since 1950Warnings in force in Mississippi nowThe forecast where you are

The other tornadoes of November 21, 1997

8 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
November 2110:50 AM CSTF1Lafayette Parish, LA3.02001$3.5 million
November 211:35 PM CSTF2Saint Tammany Parish, LA9.020043$3.5 million
November 212:18 PM CSTF1Saint Tammany Parish, LA1.050$70,000
November 212:33 PM CSTF1Pearl River, MS4.01002$700,000
November 213:00 PM CSTF1Hancock, MS0.330$50,000
November 217:40 PM CSTF3Mobile, AL1.0300$2.0 million
November 219:00 PM ESTF1Marion, GA10.0100$35 million
November 2110:45 PM CSTF1Covington, AL0.5150$250,000

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.