Tornadoes · United States · North Dakota · 2001

F0 tornado, Sharon, North Dakota, July 18, 2001

This F0 tornado ran 0.5 miles across Steele County on July 18, 2001, touching down at 7:00 PM CDT and reaching 25 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 18, 2001
Touchdown
7:00 PM CDT (00:00 UTC)
Path length
0.5 miles (0.8 km)
Path width
25 yards (23 m)
Deaths
0
Injuries
0
County
Steele County
Touchdown point
47.620, -97.900
Lift-off point
47.620, -97.900
Record number
1052

What the Weather Service recorded

A brief tornado touchdown was reported.

A brief touchdown was reported.

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

The warnings

34 minutes of warning. NWS FGF issued a tornado warning for this county at 23:26 UTC, 34 minutes before the tornado touched down, in force until 00:15 UTC.

Issued (UTC)ExpiredProductOffice
07:07 UTC07:45 UTCSevere Thunderstorm WarningFGF
23:26 UTC00:15 UTCTornado WarningFGF
00:15 UTC01:00 UTCTornado WarningFGF
01:00 UTC01:45 UTCTornado WarningFGF

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 Moderate Risk. The outlook in force was issued at 19:46 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.

What forecasters said that day

The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before the tornado touched down at Jul 18, 2:00 PM CDT, 5 hours earlier.

Area forecast discussion, Jul 18, 2:00 PM CDT, 5 hours before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
200 PM CDT WED JUL 18 2001

FORECAST CONCERN CONTINUES TO BE CONVECTION

.OVERVIEW...
SFC LOW MOVING TOWARDS NORTHEAST SD THIS AFTERNOON...WITH CONVECTION
TRYING TO FIRE ACROSS WESTERN FA NEAR SFC BOUNDARY. CAP CONTINUES TO
ERODE...WITH CAPES AROUND 5000 J/KG...EXPECT RAPID CONVECTIVE
DEVELOPMENT IN NEXT 2 HOURS. AVN FOCUSSES CONVECTION FROM VALLEY
WEST TONIGHT...WHERE ETA TARGEST SOUTHERN 2/3 OF FA. ETA HAS BEEN
CONSISTENT...SO WILL UTILIZE FOR NOW.

.SHORT TERM...
AS LOW MOVES INTO NORTHEAST SD...CONVECTION WILL FOCUS IN SOUTHERN
2/3 OF FA NEAR MAXIMIZED SFC CONVERGENCE AND UPPER LEVEL DIVERGENCE
AFTER 03Z. WITH IMPRESSIVE INSTABILITIES WITH LI/S TO -12C...EXPECT
DEEP MOIST CONVECTION WITH FLASH FLOODING A CONCERN. SEVERE WEATHER
THREAT IS ALSO LIKELY...WITH LARGE HAIL/WIND AND ISOLATED TORNADOES
NORTH OF WARMFRONT. WILL CONTINUE FLASH FLOOD WATCH UNTIL MIDNIGHT
FROM DVL-GFK NORTH...AND ELSEWHERE TONIGHT. TEMPS SIMILAR TO LAST
NIGHTS...SO WILL FOLLOW PERSISTENCE.

.LONG TERM...
WEAK HIGH TRIES TO BUILD IN ON THURSDAY...BUT WITH PLENTY OF
INSTABILITY AND MOISTURE STILL AROUND...CAN/T RULE OUT CONVECTION
ONCE AGAIN. 500MB VORTICITY MAXIMUM WILL ALSO TRAVERSE
REGION...WHICH MAY ENHANCE LIFT. THEREFORE WILL CONTINUE SCATTERED
THUNDERSTORM MENTION. A POTENT UPPER WAVE AND SFC BOUNDARY MOVE
THROUGH FA FROM WEST TO EAST THU NIGHT...ALONG WITH 35 KT 850MB LOW
LEVEL JET. AN MCS MAY DEVELOP AND MOVE ACROSS FA...SO WILL KEEP
THUNDERSTORMS IN FORECAST. STRONG 300MB DIVERGENCE IS ALSO PROGGED
WHICH WILL SUSTAIN CONVECTION. WEAK HIGH SHOULD BUILD IN FOR
FRIDAY...WITH INSTABILITIES STABILIZING IN NORTH. SOUTHERN 2/3 OF
AREA REMAIN UNSTABLE...WITH LI/S TO -8C. WILL LEAVE THUNDER MENTION
OUT FOR EXTREME NORTH...BUT LEAVE IN ELSEWHERE. TEMPS REMAIN SIMILAR
THROUGHOUT...WITH PERSISTENCE THE BEST BET.

AVN AND MRF AGREE IN BRINGING MORE DISTURBANCES IN ON SOUTHWEST FLO
FOR THE WEEKEND WITH MAIN ENERGY SHUNTED INTO CANADA. THEN UPPER
RIDGE FLATTENS AND FLO BECOMES MORE ZONAL...WITH SFC HIGH BRINGING
STABILITY MON AND TUE. WILL PUT A CHANCE OF STORMS IN NEXT WED WITH
RETURN FLO SETTING UP AHEAD OF NEXT SFC LOW. FWC AND MEX TEMPS IN
AGREEMENT...MAYBE TOO COOL MONDAY AND TUESDAY.

.FGF...FLASH FLOOD WATCH FOR UNTIL MIDNIGHT ALONG AND NORTH OF A
DVL-GFK LINE...FOR REST OF FA TONIGHT.

KELLENBENZ

In the hours before

Local storm report, Jul 18, 1:46 PM CDT, 5 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
146 PM CDT WED JUL 18 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0300 PM    THORHULT                  MN   WIND DAMAGE
07/17/01   BELTRAMI                       WIND DAMAGE TO CROPS.
                                          WHEAT FLATTENED.

0420 PM    3 NE COOPERSTOWN          ND   2 INCH HAIL
07/17/01   GRIGGS

0443 PM    5 E COOPERSTOWN           ND
07/17/01   GRIGGS                         FUNNEL CLOUD AND WALL
                                          CLOUD NEAR THE STEELE
                                          COUNTY LINE

0507 PM    5 SW PORTLAND             ND
07/17/01   TRAILL                         FUNNEL CLOUD REPORTED BY
                                          SHERIFF OFFICE

0530 PM    PONEMAH                   MN   .75 INCH HAIL
07/17/01   BELTRAMI

0600 PM    3 E COOPERSTOWN           ND   FLOODING
07/17/01   GRIGGS                         WATER OVER HIGHWAY 200

0600 PM    5 S FINLEY                ND   FLOODING
07/17/01   STEELE                         WATER OVER HIGHWAY 200 AND
                                          32.  WATER IN FIELDS AND
                                          DITCHES FLOODED.

0615 PM    3 N CHAFFEE               ND   4.5 INCH HAIL
07/17/01   CASS                           GROUND WAS WHITE MOSTLY
                                          BASEBALL SIZED HAIL

0621 PM    BEMIDJI                   MN   1.75 INCH HAIL
07/17/01   BELTRAMI

0630 PM    CARP                      MN   WIND DAMAGE
07/17/01   LAKE OF THE WOODS              10 TO 12 FEET WIDE PATH OF
                                          DOWNED TREES

0658 PM    6 S HUNTERSVILLE          MN   2.5 INCH HAIL
07/17/01   WADENA

0700 PM    THORHULT                  MN   FLOODING
07/17/01   BELTRAMI                       FLOODING OF ROADS

0715 PM    3 N HINES                 MN   1.75 INCH HAIL
07/17/01   BELTRAMI

0730 PM    12 N WYNDMERE             ND   80 MPH TSTM GUST
07/17/01   RICHLAND                       6 INCH DIAMETER TREES
                                          BLOWN DOWN

0736 PM    4 E KINDRED               ND   .75 INCH HAIL
07/17/01   CASS

0800 PM    CARP                      MN   FLOODING
07/17/01   LAKE OF THE WOODS              WIDESPREAD FLOODING OF
                                          ROADS AND DITCHES IN THE
                                          CARP AREA OF SOUTHERN LAKE
                                          OF THE WOODS COUNTY.

0830 PM    1 E TENSTRIKE             MN   1 INCH HAIL
07/17/01   BELTRAMI

0850 PM    9 W WAHPETON              ND   65 MPH TSTM GUST
07/17/01   RICHLAND                       TREES DOWN

1135 PM    13 NE VALLEY CITY         ND   .75 INCH HAIL
07/17/01   BARNES

0115 AM    9 N TOWER CITY            ND   .75 INCH HAIL
07/18/01   CASS
Local storm report, Jul 18, 2:59 PM CDT, 4 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
259 PM CDT WED JUL 18 2001

...ADDTIONAL REPORT...

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0810 PM    7 N 4 E BARNEY                ND   TORNADO
07/17/01   RICHLAND                           TOUCHDOWN REPORTED BY
                                              FARMER.  70 FOOT
                                              COTTONWOOD TREES
                                              UPROOTED AND TWISTED IN
                                              DIFFERENT DIRECTIONS.
                                              AWNINGS OF HOME AND A
                                              BARN WAS DESTROYED.

NNNN
Local storm report, Jul 18, 3:12 PM CDT, 3 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
418 AM CDT WED JUL 18 2001

...UPDATED TIMES FROM EARLIER REPORTS...

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0337 PM    10 N BEMIDJI              MN   .75 INCH HAIL
07/17/01   BELTRAMI

0350 PM    9 N BEMIDJI               MN   1 INCH HAIL
07/17/01   BELTRAMI                       AMATUER RADIO REPORT

0350 PM    7 W FINLEY                ND   2 INCH HAIL
07/17/01   GRIGGS

0354 PM    9 N BEMIDJI               MN   .75 INCH HAIL
07/17/01   BELTRAMI                       AMATUER RADIO REPORT

0400 PM    7 N BEMIDJI               MN   1 INCH HAIL
07/17/01   BELTRAMI

0404 PM    4 E COOPERSTOWN           ND   1 INCH HAIL
07/17/01   GRIGGS

0405 PM    10 N BEMIDJI              MN   1 INCH HAIL
07/17/01   BELTRAMI                       AMATUER RADIO REPORT

0405 PM    5 W FINLEY                ND   1.75 INCH HAIL
07/17/01   STEELE

0405 PM    5 W FINLEY                ND   1.75 INCH HAIL
07/17/01   STEELE

0425 PM    3 N BEMIDJI               MN   1.5 INCH HAIL
07/17/01   BELTRAMI

0428 PM    3 S FINLEY                ND   1 INCH HAIL
07/17/01   STEELE

0430 PM    10 NW FOUR TOWN           MN   1.75 INCH HAIL
07/17/01   BELTRAMI

0430 PM    11 NW FOUR TOWN           MN   1.25 INCH HAIL
07/17/01   BELTRAMI

0435 PM    5 N HOPE                  ND   1.75 INCH HAIL
07/17/01   STEELE

0435 PM    3 S SALOL                 MN   1 INCH HAIL
07/17/01   ROSEAU

0435 PM    2 NW BEMIDJI              MN   1.5 INCH HAIL
07/17/01   BELTRAMI

0440 PM    15 N GRYGLA               MN   .75 INCH HAIL
07/17/01   ROSEAU

0453 PM    4 W KELLIHER              MN   .75 INCH HAIL
07/17/01   BELTRAMI

0459 PM    15 E BEMIDJI              MN   2.75 INCH HAIL
07/17/01   BELTRAMI

0500 PM    7 SW FINLEY               ND   2 INCH HAIL
07/17/01   STEELE                         GROUND WAS WHITE; HAIL
                                          FELL FOR OVER 15 MINUTES

0510 PM    9 E COOPERSTOWN           ND   .75 INCH HAIL
07/17/01   GRIGGS

0521 PM    BEMIDJI                   MN   1.75 INCH HAIL
07/17/01   BELTRAMI                       AMATUER RADIO REPORT

0550 PM    GRACETON                  MN   .75 INCH HAIL
07/17/01   LAKE OF THE WOODS

0550 PM    GRACETON                  MN   .75 INCH HAIL
07/17/01   LAKE OF THE WOODS

0600 PM    LYNCHBURG                 ND   2.75 INCH HAIL
07/17/01   CASS

0615 PM    3 N CHAFFEE               ND   4.50 INCH HAIL
07/17/01   CASS                           BROKEN WINDOWS

0620 PM    3 NE CHAFFEE              ND   3 INCH HAIL
07/17/01   CASS

0624 PM    3 W REDBY                 MN   TORNADO
07/17/01   BELTRAMI

0624 PM    SAUM                      MN   TORNADO
07/17/01   BELTRAMI                       AMATUER RADIO REPORT

0631 PM    6 N BEMIDJI               MN   1 INCH HAIL
07/17/01   BELTRAMI

0636 PM    4 N BEMIDJI               MN   .75 INCH HAIL
07/17/01   BELTRAMI                       REPORT FROM THE NORTH
                                          SHORE OF LAKE BEMIDJI FROM
                                          AMATUER RADIO

0638 PM    BEMIDJI                   MN   1 INCH HAIL
07/17/01   BELTRAMI

0643 PM    6 N BEMIDJI               MN   1 INCH HAIL
07/17/01   BELTRAMI

0650 PM    9 N BEMIDJI               MN   1.5 INCH HAIL
07/17/01   BELTRAMI

0652 PM    2 S TURTLE RIVER          MN   1 INCH HAIL
07/17/01   BELTRAMI

0656 PM    3 SW FUNKLEY              MN   TORNADO
07/17/01   BELTRAMI

0658 PM    5 NW FUNKLEY              MN   TORNADO
07/17/01   BELTRAMI

0700 PM    7 E BEMIDJI               MN   .88 INCH HAIL
07/17/01   BELTRAMI

0700 PM    FUNKLEY                   MN   TORNADO
07/17/01   BELTRAMI

0705 PM    1 E FUNKLEY               MN   TORNADO
07/17/01   BELTRAMI

0710 PM    7 N BEMIDJI               MN   1 INCH HAIL
07/17/01   BELTRAMI

0727 PM    8 SE LEONARD              ND   .75 INCH HAIL
07/17/01   RICHLAND

0727 PM    8 SE LEONARD              ND   70 MPH TSTM GUST
07/17/01   RICHLAND

0728 PM    HINES                     MN   .75 INCH HAIL
07/17/01   BELTRAMI

0731 PM    TENSTRIKE                 MN   .75 INCH HAIL
07/17/01   BELTRAMI

0740 PM    BROCKET                   ND   .75 INCH HAIL
07/17/01   RAMSEY

0744 PM    OYLEN                     MN   1.75 INCH HAIL
07/17/01   WADENA

0745 PM    14 E BEMIDJI              MN   1 INCH HAIL
07/17/01   BELTRAMI

0747 PM    PONEMAH                   MN   1.75 INCH HAIL
07/17/01   BELTRAMI

0751 PM    ROOSEVELT                 MN   1 INCH HAIL
07/17/01   ROSEAU

0755 PM    1 E ROOSEVELT             MN   .75 INCH HAIL
07/17/01   LAKE OF THE WOODS

0800 PM    1 E ROOSEVELT             MN   .75 INCH HAIL
07/17/01   LAKE OF THE WOODS

0810 PM    8 N BARNEY                ND   1 INCH HAIL
07/17/01   RICHLAND

0810 PM    8 N BARNEY                ND   WIND DAMAGE
07/17/01   RICHLAND                       BARN AND MACHINE SHED
                                          KNOCKED OVER...RADIO
                                          TOWERS AND TREES ALSO
                                          BLOWN DOWN.

0805 PM    MOORETON                  ND   65 MPH TSTM GUST
07/17/01   RICHLAND

0820 PM    MOORETON                  ND   79 MPH TSTM GUST
07/17/01   RICHLAND

0838 PM    10 N PARK RAPIDS          MN   .88 INCH HAIL
07/17/01   HUBBARD

0838 PM    2 S FINGAL                ND   2 INCH HAIL
07/17/01   BARNES

0846 PM    10 NE PARK RAPIDS         MN   1.75 INCH HAIL
07/17/01   HUBBARD

0854 PM    1 N ROTHSAY               MN   62 MPH TSTM GUST
07/17/01   WILKIN

0855 PM    7 SW ALICE                ND   1.75 INCH HAIL
07/17/01   CASS

0855 PM    3 SE MOORETON             ND   1.75 INCH HAIL
07/17/01   RICHLAND

0903 PM    FERGUS FALLS              MN   65 MPH TSTM GUST
07/17/01   OTTER TAIL

0915 PM    SHELDON                   ND   .75 INCH HAIL
07/17/01   RANSOM

0955 PM    5 SW LISBON               ND   1.5 INCH HAIL
07/17/01   RANSOM

1007 PM    PARKERS PRAIRIE           MN   .75 INCH HAIL
07/17/01   OTTER TAIL

1010 PM    6 S LISBON                ND   1.75 INCH HAIL
07/17/01   RANSOM

1015 PM    7 S LISBON                ND   1.75 INCH HAIL
07/17/01   RANSOM                

1100 PM    5 E MOORETON              ND   1 INCH HAIL
07/17/01   RICHLAND
Local storm report, Jul 18, 3:17 PM CDT, 3 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
317 PM CDT WED JUL 18 2001

...LATE REPORT...

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0800 PM    WALCOTT                   ND   WIND DAMAGE
07/17/01   RICHLAND                       ROOF OF WALCOTT FIRE
                                          STATION BLOWN OFF.
                                          MANY TREES UPROOTED.

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.

Bismarck Municip, ND (KBIS), 00:00Z

0.0 hours before the tornado, 232 km from the path. July 19, 2001.

Skew-T log-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2001-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2623 joules per kilogram, CIN -63, lifted condensation level 1396 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 00:00Z on 2001-07-19The 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 15 square meters per square second, 0 to 6 km bulk shear 43 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
2623 J/kg
Mixed-layer CIN
-63 J/kg
Surface CAPE
4942 J/kg
Mixed-layer LCL
1396 m above ground
0-6 km bulk shear
43 kt
0-1 km bulk shear
4 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.4
0-3 km lapse rate
7.4 K/km

Open this sounding in Storm Lab

Bismarck Municip, ND (KBIS), 12:00Z

12.0 hours after it, 232 km from the path. July 19, 2001.

Skew-T log-pSkew-T log-p diagram, Bismarck Municip, ND at 12:00Z on 2001-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 127 joules per kilogram, CIN -567, lifted condensation level 1721 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 12:00Z on 2001-07-19The 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 -45 square meters per square second, 0 to 6 km bulk shear 36 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
127 J/kg
Mixed-layer CIN
-567 J/kg
Surface CAPE
173 J/kg
Mixed-layer LCL
1721 m above ground
0-6 km bulk shear
36 kt
0-1 km bulk shear
5 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
3.5 K/km

Open this sounding in Storm Lab

The surface observations

Grand_forks_afb (RDR), 53 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
22:55 UTC8677170° 7 kt1008.8
23:04 UTC8677140° 6 kt1008.5
23:55 UTC84.278.8200° 6 kt1008.5TS
00:45 UTC84.278.8200° 4 kt1008.8-TSRA
00:55 UTC82.478.8170° 9 kt1008.8-TSRA
01:43 UTC82.478.820° 5 kt1009.5
01:55 UTC82.478.840° 5 kt1009.1

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

The radar

The Fargo/Grand Forks radar (KMVX), 44 km away, was scanning. The volume nearest the touchdown began at 00:03 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 2001 tornado in North DakotaEvery tornado in North Dakota since 1950Warnings in force in North Dakota nowThe forecast where you are

The other tornadoes of July 18, 2001

25 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
July 184:34 PM CDTF0Pembina, ND0.525
July 185:00 PM CDTF0Kittson, MN0.525
July 185:55 PM CDTF0Nelson, ND0.525
July 185:57 PM CDTF0Griggs, ND0.525
July 186:04 PM CDTF0Griggs, ND0.525
July 186:05 PM CDTF3Nelson, ND5.0150$200,000
July 186:09 PM CDTF0Griggs, ND1.025
July 186:23 PM CDTF0Nelson, ND0.5100
July 186:25 PM CDTF0Nelson, ND0.5100
July 186:35 PM CDTF0Griggs, ND0.525
July 186:58 PM CDTF1Thayer, NE2.040$50,000
July 187:00 PM CDTF0Nelson, ND0.525
July 187:04 PM CDTF0Nelson, ND0.525
July 187:20 PM CDTF0Nelson, ND0.525
July 188:00 PM CDTF0Steele, ND0.525
July 188:00 PM CDTF0Griggs, ND0.525
July 188:05 PM CDTF0Lake of the Woods, MN0.525
July 188:30 PM CDTF0McIntosh, ND3.040
July 188:40 PM CDTF2Edmunds, SD1.0100
July 188:45 PM CDTF0McPherson, SD0.550
July 188:53 PM CDTF1LaMoure, ND3.050
July 189:05 PM CDTF1Marshall, MN1.050
July 189:19 PM CDTF0Faulk, SD0.325
July 1812:04 AM CDTF0Grand Forks, ND0.525
July 1812:14 AM CDTF0Grand Forks, ND1.025

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.