Tornadoes · United States · Colorado · 2019

Unrated tornado, Clarkville, Colorado, May 27, 2019

This Unrated tornado ran 0.0 miles across Yuma County on May 27, 2019, touching down at 5:25 PM MDT and reaching 10 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 mph

    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. Unratedthis tornado

    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
Unrated
Date
May 27, 2019
Touchdown
5:25 PM MDT (23:25 UTC)
Path length
0.0 miles (0.0 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
County
Yuma County
Touchdown point
40.360, -102.630
Lift-off point
40.360, -102.630
Record number
1905271725-01

What the Weather Service recorded

Thunderstorms produce a brief tornado and up to hen egg sized hail in northern Yuma County.

Brief, weak touchdowns under rotating wall cloud.

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 severe thunderstorm watch, issued at 22:28 UTC and running to 06:58 UTC.

Issued (UTC)ExpiredProductOffice
11:56 UTC15:00 UTCDense Fog AdvisoryGLD
22:28 UTC06:58 UTCSevere Thunderstorm WatchGLD
23:04 UTC23:45 UTCSevere Thunderstorm WarningGLD
23:30 UTC00:15 UTCTornado WarningGLD
00:42 UTC01:15 UTCSevere Thunderstorm WarningGLD
01:30 UTC02:00 UTCTornado WarningGLD
01:56 UTC02:15 UTCSevere Thunderstorm WarningGLD
03:51 UTC04:15 UTCTornado WarningGLD
04:09 UTC04:45 UTCTornado WarningGLD
04:35 UTC05:30 UTCSevere Thunderstorm WarningGLD

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 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 19:58 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.

Denver, CO (KDEN), 12:00Z

11.4 hours before the tornado, 75 km from the path. May 27, 2019.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2019-05-27Temperature 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 -82907, lifted condensation level 1644 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 km2 km3 km6 km9 km12 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, Denver, CO at 12:00Z on 2019-05-27The 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 18 square meters per square second, 0 to 6 km bulk shear 40 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
0 J/kg
Mixed-layer CIN
-82907 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1644 m above ground
0-6 km bulk shear
40 kt
0-1 km bulk shear
5 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.2 K/km

Open this sounding in Storm Lab

Denver, CO (KDEN), 00:00Z

0.6 hours after it, 75 km from the path. May 28, 2019.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2019-05-28Temperature 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 -99, lifted condensation level 2729 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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, Denver, CO at 00:00Z on 2019-05-28The 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 79 square meters per square second, 0 to 6 km bulk shear 34 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
0 J/kg
Mixed-layer CIN
-99 J/kg
Surface CAPE
42 J/kg
Mixed-layer LCL
2729 m above ground
0-6 km bulk shear
34 kt
0-1 km bulk shear
15 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
8.2 K/km

Open this sounding in Storm Lab

The radar

The Goodland radar (KGLD), 136 km away, was scanning. The volume nearest the touchdown began at 23:25 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.

What was reported nearby

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

Time (UTC)ReportWhereCountyRemark
22:13 UTCHAIL 1.75IliffLogan, COHAIL ACCUMULATING TO 3 INCHED DEEP IN TOWN. MINOR LOCALIZED FLOODING OF STREETS AND FIELDS. SIGNIFICANT DAMAGE TO VEGETATION IN AND AROUND ILIFF.
22:36 UTCTORNADO5 S CrookLogan, COBRIEF WEAK TORNADO. NO DAMAGE REPORTED.
22:42 UTCHAIL 1CrookLogan, CO
22:45 UTCTORNADO3 Sw Marks ButteSedgwick, CODAMAGE TO GRAIN BINS CONSISTENT WITH A TORNADO RATED EF-0. 10 OF 12 20,000 BUSHEL GRAIN BINS WERE DAMAGED, SOME FROM DOWNED PIPES THAT FELL ONTO THEM. FURTHER SOUTH 4 IRRIGATION PIVOTS WERE DAMAGED WITHIN A 3 MILE RADIUS
23:23 UTCFUNNEL CLOUD9 N YumaYuma, CO
23:25 UTCTORNADO2 Ssw ClarkvilleYuma, COSPOTTER REPORTED TORNADO 2 MILES SOUTH OF CLARKVILLE. BRIEF WEAK TOUCHDOWNS UNDER ROTATING WALL CLOUD.
23:26 UTCFUNNEL CLOUD6 Sw ClarkvilleYuma, CO
23:29 UTCTORNADO4 S ClarkvilleYuma, CODELAYED REPORT. PHOTO OF TORNADO VIA TWITTER.
23:32 UTCHAIL 0.252 Nw ClarkvilleYuma, CO
23:33 UTCTORNADO4 Sse ClarkvilleYuma, COFOOTAGE OF TORNADO FROM A STORM CHASER NORTHEAST OF YUMA.
23:36 UTCHAIL 0.752 N ClarkvilleYuma, CO
23:40 UTCHAIL 1ClarkvilleYuma, CO
23:50 UTCHAIL 1.253 Nne ClarkvilleYuma, COUP TO HALF DOLLAR SIZED HAIL REPORTED. PASTURE GRASSES BLOWN DOWN. VIA FACEBOOK.
23:51 UTCTORNADO10 Sse PaoliPhillips, COBRIEF TOUCHDOWN OF A WEAK TORNADO NEAR THE PHILLIPS AND YUMA COUNTY LINE. NO DAMAGE REPORTED.
23:53 UTCHAIL 15 Ne ClarkvilleYuma, CO
23:53 UTCTORNADO12 Ene ClarkvilleYuma, CONOT FULLY CONDENSED, BUT CLEAR CIRCULATION AT ALL LEVELS BENEATH BASE WITH MULTIPLE GROUND CIRCULATIONS. LASTED ONE MINUTE.
23:58 UTCHAIL 110 S PaoliPhillips, CO
00:00 UTCHAIL 0.887 Nnw AlvinYuma, CO
00:00 UTCHAIL 0.888 N AlvinYuma, CO
00:10 UTCHAIL 112 S Pleasant ValleyPhillips, CO
00:23 UTCHAIL 1.758 Ese HolyokePhillips, CO
00:30 UTCHAIL 2.512 Sse HolyokePhillips, CO
00:32 UTCTORNADO12 Ese HolyokePhillips, COBRIEF WEAK TORNADO IN OPEN COUNTRY. NO DAMAGE.
01:00 UTCHAIL 15 Se YumaYuma, COQUARTER SIZE HAIL REPORTED 3 MILES EAST AND 2 MILES SOUTH OF YUMA AT 7 PM MDT.
02:02 UTCHAIL 14 Nw AlvinYuma, CO

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

This ground now

The live radar over the trackEvery 2019 tornado in ColoradoEvery tornado in Colorado since 1950Warnings in force in Colorado nowThe forecast where you are

The other tornadoes of May 27, 2019

62 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 271:10 AM CDTEF0Potter, TX1.650
May 271:13 AM CDTEF0Mitchell, KS0.025$25,000
May 2712:07 PM CDTEF0Freeborn, MN0.650
May 2712:23 PM CDTEF1Floyd, IA9.8105$625,000
May 271:10 PM CDTEF0Chickasaw, IA4.125$35,000
May 271:23 PM CDTEF0Fillmore, MN0.225$15,000
May 271:25 PM CDTEF1Howard, IA12.695$1.3 million
May 271:25 PM CDTEF3Van Buren, IA7.3100
May 271:29 PM CDTEF0Fillmore, MN0.215$5,000
May 271:36 PM CDTEF1Lee, IA0.520
May 271:40 PM CDTEF0Fillmore, MN0.225$20,000
May 271:47 PM CDTEF0Kendall, IL1.030
May 271:49 PM CDTEF0Howard, IA to MN6.230$202,000
May 272:03 PM CDTEF0Des Moines, IA0.120
May 272:04 PM CDTEF0Will, IL3.2300
May 273:15 PM CDTEF0Knox, IL0.110
May 273:02 PM MDTEF0Morgan, CO0.025
May 273:22 PM MDTEF0Logan, CO0.025
May 274:27 PM CDTEF0Lee, IL0.730
May 274:27 PM CDTEF0Cook, IL0.850
May 274:30 PM CDTEF0Lake, IN1.1100
May 274:38 PM CDTEF0Woodford, IL0.110
May 273:40 PM MDTEF0Elmore, ID0.510
May 274:35 PM MDTEF0Logan, CO0.025
May 274:44 PM MDTEF0Sedgwick, CO0.050
May 274:53 PM MDTEF0Adams, CO0.025
May 275:04 PM MDTEF0Weld, CO0.025
May 277:34 PM EDTEF1Miami, IN0.650
May 277:51 PM EDTEF3Fulton, IN13.7800
May 275:51 PM MDTEF0Phillips, CO0.025
May 278:05 PM EDTEF2Madison, IN5.91001$150,000
May 278:10 PM EDTEF2Grant, IN4.1150
May 278:26 PM EDTEF1Wabash, IN1.950
May 278:29 PM EDTEF1Henry, IN0.250$20,000
May 276:31 PM MDTEF0Phillips, CO0.025
May 278:39 PM EDTEF1Henry, IN2.5200$40,000
May 276:43 PM MDTEF0Chase, NE0.225
May 278:59 PM EDTEF3Wells, IN12.81,2002
May 277:23 PM MDTEF1Chase, NE5.5250$200,000
May 277:37 PM MDTEF0Chase, NE0.150$15,000
May 279:48 PM EDTEF1Darke, OH1.4100$100,000
May 2710:02 PM EDTEF3Mercer, OH10.825018$15 million
May 2710:04 PM EDTEF1Darke, OH0.5200$500,000
May 278:05 PM MDTEF0Chase, NE0.225$15,000
May 2710:25 PM EDTEF3Darke, OH10.51,3201$10 million
May 2710:33 PM EDTEF1Auglaize, OH1.3150$500,000
May 2710:41 PM EDTEF4Dayton tornado, OH18.21,050166$500 million
May 2710:47 PM EDTEF0Auglaize, OH4.0150$50,000
May 2710:47 PM EDTEF0Miami, OH5.6200$50,000
May 2711:01 PM EDTEF0Auglaize, OH0.230$10,000
May 2711:08 PM EDTEF0Miami, OH1.150$10,000
May 2711:12 PM EDTEF3Montgomery, OH9.91,230$51 million
May 2711:19 PM EDTEF0Miami, OH3.050$70,000
May 2711:28 PM EDTEF0Hardin, OH2.050$25,000
May 2711:34 PM EDTEF2Montgomery, OH7.6440$1.0 million
May 2710:45 PM CDTEF0Nuckolls, NE0.075$75,000
May 2711:48 PM EDTEF1Greene, OH5.8250$53,000
May 2712:23 AM EDTEF0Greene, OH4.2250$200,000
May 2712:57 AM EDTEF1Pickaway, OH3.8150$1.0 million
May 271:09 AM EDTEF1Pickaway, OH1.675$1.5 million

All 63 of them

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.