Tornadoes · United States · Iowa · 2022

EF0 tornado, Hawthorne, Iowa, March 5, 2022

This EF0 tornado ran 0.0 miles across Montgomery County on March 5, 2022, touching down at 3:02 PM CST and reaching 17 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
March 5, 2022
Touchdown
3:02 PM CST (21:02 UTC)
Path length
0.0 miles (0.0 km)
Path width
17 yards (16 m)
Deaths
0
Injuries
0
County
Montgomery County
Touchdown point
41.030, -95.380
Lift-off point
41.030, -95.380
Record number
2203051502-01

The damage survey

3 damage points were recorded along this path by NWS OAX, in the Damage Assessment Toolkit the survey teams carry. The highest wind the damage implies is 100 mph.

  • Weak shed hit by high winds blown to the north.
  • Weak shed roof blown to the north

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

What the Weather Service recorded

A strong low pressure system moved from Kansas across Iowa initiating severe storms and tornadoes in Iowa.

Multiple storm chasers reported a tornado northeast of Emerson that produced minor damage.

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

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

The county was under a tornado watch, issued at 20:06 UTC and running to 22:14 UTC.

Issued (UTC)ExpiredProductOffice
20:06 UTC22:14 UTCTornado WatchOAX
20:33 UTC21:15 UTCSevere Thunderstorm WarningOAX
20:53 UTC21:45 UTCSevere Thunderstorm WarningOAX
20:56 UTC21:29 UTCSevere Thunderstorm WarningOAX
20:57 UTC21:31 UTCSevere Thunderstorm WarningOAX
21:10 UTC21:30 UTCTornado WarningOAX
21:15 UTC21:45 UTCTornado WarningOAX
21:24 UTC21:44 UTCTornado WarningOAX

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 Enhanced Risk, with a 0.10 chance of a tornado within 25 miles. The outlook in force was issued at 19:48 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.

Omaha, NE (KOAX), 12:00Z

9.0 hours before the tornado, 89 km from the path. March 5, 2022.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2022-03-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 119 joules per kilogram, CIN -205, lifted condensation level 883 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, Omaha, NE at 12:00Z on 2022-03-05The 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 93 square meters per square second, 0 to 6 km bulk shear 60 knots.1939587897117Sfc1 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
119 J/kg
Mixed-layer CIN
-205 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
883 m above ground
0-6 km bulk shear
60 kt
0-1 km bulk shear
23 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
96 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

Omaha, NE (KOAX), 00:00Z

3.0 hours after it, 89 km from the path. March 6, 2022.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2022-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 6 joules per kilogram, CIN 0, lifted condensation level 454 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2022-03-06The 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 37 square meters per square second, 0 to 6 km bulk shear 59 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
6 J/kg
Mixed-layer CIN
0 J/kg
Surface CAPE
5 J/kg
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
59 kt
0-1 km bulk shear
26 kt
0-1 km storm-relative helicity
37 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
2.8 K/km

Open this sounding in Storm Lab

The surface observations

Red Oak (RDK), 10 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
19:05 UTC5959160° 14 kt191000.3
19:10 UTC5959160° 13 kt191000.3
19:15 UTC5959150° 14 kt1000.3
19:20 UTC60.860.8160° 14 kt1000
19:25 UTC60.860.8160° 17 kt1000
19:30 UTC60.860.8160° 13 kt221000
19:35 UTC62.660.8170° 18 kt241000
19:40 UTC62.662.6170° 20 kt251000
19:45 UTC62.662.6170° 17 kt25999.7
19:50 UTC62.662.6170° 15 kt24999.7
19:55 UTC62.662.6160° 16 kt24999.7
20:00 UTC64.462.6170° 16 kt21999.3
20:05 UTC64.464.4170° 14 kt20999.3
20:10 UTC66.264.4180° 13 kt19999.3
20:15 UTC66.262.6170° 15 kt999.3
20:20 UTC66.262.6170° 15 kt21999
20:25 UTC66.262.6170° 14 kt21998.6
20:30 UTC66.262.6160° 14 kt998.6
20:35 UTC64.460.8160° 13 kt19998.3
20:40 UTC64.460.8160° 13 kt20998.3
20:45 UTC64.460.8160° 15 kt20998
20:50 UTC64.460.8 998
20:55 UTC64.460.8140° 12 kt997.6BR
21:00 UTC62.660.8150° 11 kt997.3BR
21:05 UTC62.660.8220° 12 kt998BR
21:10 UTC62.660.8240° 14 kt19998-RA
21:15 UTC62.657.2 5 kt19997RA
21:20 UTC62.657.2210° 14 kt24997.6-RA
21:25 UTC64.459170° 18 kt25997.6-RA
21:30 UTC64.460.8180° 17 kt25997.6
21:35 UTC66.260.8180° 13 kt24997.3
21:40 UTC66.260.8180° 13 kt18997.6
21:45 UTC66.260.8190° 11 kt997.6
21:50 UTC66.260.8260° 9 kt15998
21:55 UTC66.260.8270° 14 kt20998
22:00 UTC64.460.8280° 15 kt20998
22:05 UTC60.859280° 16 kt998.3BR
22:10 UTC5957.2290° 21 kt998.3BR
22:15 UTC55.453.6290° 20 kt25999BR
22:20 UTC51.851.8290° 20 kt29999BR
22:25 UTC5050290° 22 kt29999.3BR
22:30 UTC48.248.2290° 22 kt27999.7BR
22:35 UTC46.446.4290° 24 kt1000BR
22:40 UTC46.446.4290° 21 kt291000BR
22:45 UTC44.644.6300° 18 kt291000BR
22:50 UTC44.644.6300° 15 kt251000BR
22:55 UTC44.642.8300° 16 kt26999.7FG
23:00 UTC42.842.8290° 18 kt261000FG

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

The radar

The Omaha radar (KOAX), 89 km away, was scanning. The volume nearest the touchdown began at 21:01 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
21:01 UTCTSTM WND DMG1 Se EmersonMills, IAPOWERLINES DOWN AND OUTBUILDING DESTROYED.
21:02 UTCTORNADO 11 Ne EmersonMontgomery, IAMULTIPLE STORM CHASERS REPORTING A TORNADO JUST NORTHEAST OF EMERSON.
21:02 UTCTORNADO1 Ne EmersonMontgomery, IACORRECTS PREVIOUS TORNADO REPORT FROM 1 NE EMERSON. MULTIPLE STORM CHASERS REPORTING A TORNADO JUST NORTHEAST OF EMERSON.
21:15 UTCHAIL 17 E EssexPage, IAREPORT FROM MPING: QUARTER (1.00 IN.).
21:16 UTCTSTM WND DMG1 Se EmersonMills, IADAMAGE TO ROOF AND FLIPPED TRAMPOLINE.
21:17 UTCFUNNEL CLOUD4 Ese EssexPage, IAMULTIPLE REPORTS OF A FUNNEL.
21:18 UTCFUNNEL CLOUD6 N VilliscaMontgomery, IAFUNNEL CLOUD REPORTED.
21:25 UTCHAIL 0.752 S WalnutPottawattamie, IA
21:40 UTCFUNNEL CLOUDCorningAdams, IASTORM CHASER REPORT OF FUNNEL CLOUD NEAR CORNING.
21:40 UTCTORNADO1 S CorningAdams, IAMULTIPLE REPORTS OF BRIEF TORNADO TOUCHDOWN SOUTH OF CORNING.
21:42 UTCHAIL 1.251 Se NodawayAdams, IAQUARTER TO PING PONG SIZED HAIL REPORTED SOUTHEAST OF NODAWAY, IOWA.
21:55 UTCFUNNEL CLOUD1 Se CumberlandCass, IAMULTIPLE STORM CHASER REPORTS OF A FUNNEL CLOUD SE OF CUMBERLAND, IA.

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

This ground now

The live radar over the trackEvery 2022 tornado in IowaEvery tornado in Iowa since 1950Warnings in force in Iowa nowThe forecast where you are

The other tornadoes of March 5, 2022

18 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 53:38 PM CSTUnratedAdams, IA1.540
March 54:01 PM CSTEF0Adams, IA2.8100$10,000
March 54:26 PM CSTEF4Winterset tornado, IA70.690065$220 million
March 55:07 PM CSTEF2Decatur, IA19.4300$600,000
March 55:20 PM CSTUnratedDecatur, IA2.160
March 55:28 PM CSTUnratedLucas, IA2.160
March 55:33 PM CSTEF3Lucas, IA11.335011$1.5 million
March 55:38 PM CSTEF2Wayne, IA9.9300$300,000
March 55:40 PM CSTEF0Lucas, IA0.360
March 56:04 PM CSTEF2Jasper, IA17.3500$506,000
March 56:33 PM CSTEF2Tama, IA8.5200$200,000
March 57:10 PM CSTEF1Benton, IA14.0400
March 58:37 PM CSTEF1Scott, IA4.1300
March 58:37 PM CSTEF0Scott, IA0.125
March 59:13 PM CSTEF1Whiteside, IL4.050
March 59:48 PM CSTEF1Dane, WI6.050$50,000
March 510:11 PM CSTEF0Mason, IL6.950
March 510:57 PM CSTEF1Montgomery, IL3.940$50,000

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.