Tornadoes · United States · Missouri · 2007

EF0 tornado, Hume, Missouri, April 27, 2007

This EF0 tornado ran 1.1 miles across Bates County on April 27, 2007, touching down at 6:20 PM CDT and reaching 25 yards wide. It killed nobody.

The rating scale

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

  1. EF065 to 85 mphthis tornado

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

  2. EF186 to 110 mph

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

  3. EF2111 to 135 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. EF3136 to 165 mph

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

  5. EF4166 to 200 mph

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

  6. EF5over 200 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
EF0
Date
April 27, 2007
Touchdown
6:20 PM CDT (23:20 UTC)
Lifted
6:22 PM CDT (23:22 UTC)
On the ground
2 minutes
Path length
1.1 miles (1.8 km)
Path width
25 yards (23 m)
Deaths
0
Injuries
0
County
Bates County
Touchdown point
38.086, -94.580
Lift-off point
38.073, -94.566
Record number
0704271720-01

What the Weather Service recorded

An upper level storm system dropped southeast across the region during the late afternoon and early evening hours on April 27th. Several reports of large hail and one report of a tornado were received.

Trained spotter reported a brief tornado touchdown at 5:20 pm CST...1 mile south of Hume. The tornado lifted at 5:22 pm CST 2 miles south- southeast of Hume. The condensation funnel extended most of the way to the ground with an associated surface dust whirl. Four to five inch diameter tree branches broken off on several trees in the path.

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

The warnings

14 minutes of warning. NWS EAX issued a tornado warning for this county at 23:06 UTC, 14 minutes before the tornado touched down, in force until 23:30 UTC.

Issued (UTC)ExpiredProductOffice
23:06 UTC23:30 UTCTornado WarningEAX
23:31 UTC23:45 UTCSevere Thunderstorm WarningEAX

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 19:37 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.

Topeka, KS (KTOP), 12:00Z

11.3 hours before the tornado, 138 km from the path. April 27, 2007.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2007-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -102234, lifted condensation level 1733 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Topeka, KS at 12:00Z on 2007-04-27The 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 73 square meters per square second, 0 to 6 km bulk shear 36 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
0 J/kg
Mixed-layer CIN
-102234 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1733 m above ground
0-6 km bulk shear
36 kt
0-1 km bulk shear
18 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
2.3 K/km

Open this sounding in Storm Lab

Topeka, KS (KTOP), 00:00Z

0.7 hours after it, 138 km from the path. April 28, 2007.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2007-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 91 joules per kilogram, CIN -2, lifted condensation level 1129 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Topeka, KS at 00:00Z on 2007-04-28The 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 60 square meters per square second, 0 to 6 km bulk shear 28 knots.193958Sfc1 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
91 J/kg
Mixed-layer CIN
-2 J/kg
Surface CAPE
237 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
28 kt
0-1 km bulk shear
12 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
7.4 K/km

Open this sounding in Storm Lab

The radar

The Pleasant Hill radar (KEAX), 86 km away, was scanning. The volume nearest the touchdown began at 23:20 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.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)ReportWhereCountyRemark
23:10 UTCHAIL 1.752 S HortonVernon, MO
23:15 UTCHAIL 1HumeBates, MOHAIL COVERED GROUND...LOOKED LIKE IT SNOWED.
23:15 UTCHAIL 1.75HumeBates, MOHAIL 3 INCHES DEEP.
23:20 UTCHAIL 1.75HumeBates, MONICKEL TO GOLFBALL SIZED HAIL UP TO THREE INCHES DEEP REPORTED IN AND AROUND HUME. MANY LEAVES STRIPPED FROM TREES.
23:20 UTCTORNADO1 S HumeBates, MOSPOTTER REPORTED A TORNADO WHICH HAD A CONDENSATION FUNNEL EXTENDING MOST OF THE WAY TO THE GROUND WITH AN ASSOCIATED DUST WHIRL. ALSO 4-5 INCH DIAMETER BRANCHES BROKEN OFF THE TOP OF SEVERAL TREES AT THIS LOCATION.
23:30 UTCTSTM WND DMGMetzVernon, MOFOUR INCH DIAMETER TREE LIMBS DOWN
23:30 UTCHAIL 2.75MetzVernon, MO
00:05 UTCHAIL 1WalkerVernon, MO
00:10 UTCFUNNEL CLOUD6 W El Dorado SpringsVernon, MOCEDAR COUNTY EMERGENCY MANAGEMENT REPORT
00:10 UTCHAIL 0.886 W El Dorado SpringsVernon, MO

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the trackEvery 2007 tornado in MissouriEvery tornado in Missouri since 1950Warnings in force in Missouri nowThe forecast where you are

The other tornadoes of April 27, 2007

2 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 2712:30 PM EDTEF0Gloucester, VA5.1100$50,000
April 276:30 PM CDTEF0Vernon, MO12.925$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.