Tornadoes · United States · Colorado · 1998

F0 tornado, Las Animas, Colorado, July 30, 1998

This F0 tornado ran 0.1 miles across Bent County on July 30, 1998, touching down at 8:25 PM MDT and reaching 50 yards wide. It killed nobody.

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 mphthis tornado

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

  2. F173 to 112 mph

    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
F0
Date
July 30, 1998
Touchdown
8:25 PM MDT (02:25 UTC)
Path length
0.1 miles (0.2 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
0
County
Bent County
Touchdown point
38.100, -103.300
Lift-off point
38.100, -103.300
Record number
1338

What the Weather Service recorded

A fire department in Bent county reported a brief tornado touchdown 5 miles northwest of Las Animas. No known damage occurred.

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

The warnings

13 minutes of warning. NWS PUB issued a tornado warning for this county at 02:12 UTC, 13 minutes before the tornado touched down, in force until 03:10 UTC.

Issued (UTC)ExpiredProductOffice
02:12 UTC03:10 UTCTornado WarningPUB

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 General Thunderstorms Risk. The outlook in force was issued at 10:56 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 surface observations

La Junta Municipal (LHX), 19 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
01:53 UTC7465130° 8 kt1020.3
02:07 UTC71.662.6320° 37 kt441022TS SQ
02:11 UTC62.660.8330° 35 kt451023-TSRA SQ FG
02:17 UTC60.859350° 31 kt451023+TSRA FG
02:22 UTC5957.210° 28 kt441022.7-TSRA FG
02:38 UTC60.85910° 22 kt321022.7+TSRA BR
02:45 UTC60.85920° 22 kt301022.7+TSRA BR
02:53 UTC615920° 21 kt291023TSRA BR
03:03 UTC60.85940° 25 kt301022.7-TSRA BR
03:53 UTC615970° 26 kt331022.4-RA
04:08 UTC62.65980° 19 kt281023-RA

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Pueblo radar (KPUX), 87 km away, was scanning. The volume nearest the touchdown began at 02:23 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 1998 tornado in ColoradoEvery tornado in Colorado since 1950Warnings in force in Colorado nowThe forecast where you are

The other tornadoes of July 30, 1998

5 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
July 303:15 AM CDTF0Pemiscot, MO0.130
July 302:35 PM PDTF0Washoe, NV2.050
July 306:00 PM EDTF1Berkeley, WV1.0150$80,000
July 306:15 PM EDTF0Frederick, VA0.580$10,000
July 309:25 PM EDTF0Harford, MD0.6100$10,000

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.