Pilot Index / Montana / May 31, 2018

Preliminary

Storms in Montana on May 31, 2018

55 published severe reports across Montana on May 31, 2018.

Updated Oct 28, 2026.

Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail reports: 34. Wind reports: 21. Tornado reports: 0.

The table and map show 40 of 55 reports.

TimeWhatSize or SpeedWhereDetails
May 31, 2018, 12:52 PM MDTHail1.00 inHAMILTON
Record
  • May 31, 2018, 12:52 PM MDT. Hail, 1.00 in, HAMILTON. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:760826.
May 31, 2018, 1:23 PM MDTHail1.00 in2 ENE GRANTSDALE
Record
  • May 31, 2018, 1:23 PM MDT. Hail, 1.00 in, 2 ENE GRANTSDALE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:bd11ca9b13c689ce3624d5eb41ce1ae02d5040bf525ba385ce333607de9aa440.
May 31, 2018, 1:24 PM MDTHail1.50 inHAMILTON
Record
  • May 31, 2018, 1:24 PM MDT. Hail, 1.50 in, HAMILTON. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:760828.
May 31, 2018, 1:27 PM MDTHail1.50 in5 SSE CORVALLIS
Record
  • May 31, 2018, 1:27 PM MDT. Hail, 1.50 in, 5 SSE CORVALLIS. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:2e552731244d5aacc27f334461c23cb4ae701de54d8e7980ba9fe038c66c579b.
May 31, 2018, 1:34 PM MDTWind58 mph6 WNW MISSOULA
Record
  • May 31, 2018, 1:34 PM MDT. Wind, 58 mph, 6 WNW MISSOULA. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:3f98496c36b79a2314989327a897db0194a57ed253655f78b2bae6bcb4b4d168.
May 31, 2018, 1:40 PM MDTHail1.00 in1 NW MISSOULA
Record
  • May 31, 2018, 1:40 PM MDT. Hail, 1.00 in, 1 NW MISSOULA. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:a01ee42a4f23f870f3ab15d00b066f6cd2de6aa2b75bac77833cc4f1abf4749f.
May 31, 2018, 2:36 PM MDTHail1.00 inSEELEY LAKE
Record
  • May 31, 2018, 2:36 PM MDT. Hail, 1.00 in, SEELEY LAKE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:fce7b92b27cbd5c4aa3505e4ec18a7568f5efc264635ef0eb83523f3d1da99eb.
May 31, 2018, 2:47 PM MDTHail1.00 inHALL
Record
  • May 31, 2018, 2:47 PM MDT. Hail, 1.00 in, HALL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:760830.
May 31, 2018, 3:03 PM MDTHail1.00 inHALL
Record
  • May 31, 2018, 3:03 PM MDT. Hail, 1.00 in, HALL. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:4db217488c8a8dc16ee831f80c50aa4593d3f76c9d7999a0f85f154de9767705.
May 31, 2018, 3:14 PM MDTHail1.00 inGRANNIS
Record
  • May 31, 2018, 3:14 PM MDT. Hail, 1.00 in, GRANNIS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751217.
May 31, 2018, 3:20 PM MDTHail1.00 inSHAWMUT
Record
  • May 31, 2018, 3:20 PM MDT. Hail, 1.00 in, SHAWMUT. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751218.
May 31, 2018, 3:52 PM MDTHail1.00 inSHAWMUT
Record
  • May 31, 2018, 3:52 PM MDT. Hail, 1.00 in, SHAWMUT. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751220.
May 31, 2018, 3:58 PM MDTHail1.00 in1 N SHAWMUT
Record
  • May 31, 2018, 3:58 PM MDT. Hail, 1.00 in, 1 N SHAWMUT. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:ba410dd5e8b84b44611b4931e145e409dc6ccdfed87f780d693aca5bb9892165.
May 31, 2018, 4:22 PM MDTHail1.75 in1 SW ROUNDUP
Record
  • May 31, 2018, 4:22 PM MDT. Hail, 1.75 in, 1 SW ROUNDUP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:c99f038621b1b0ef7b9ed412f8255b7706deb3744ee82909cfbd547bd39688c3.
May 31, 2018, 4:22 PM MDTWind175 mph1 SW ROUNDUP
Record
  • May 31, 2018, 4:22 PM MDT. Wind, 175 mph, 1 SW ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:443ae4eaa80b5130884da59f01b2d9328458b21f25ce8032268ab68d5d68734c.
May 31, 2018, 4:25 PM MDTHail1.00 in10 NE RYEGATE
Record
  • May 31, 2018, 4:25 PM MDT. Hail, 1.00 in, 10 NE RYEGATE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:38f6084893e0fa673ef9a6f932ce42bdf44a2b99ce632757e91a4969a7874fc8.
May 31, 2018, 4:25 PM MDTWind100 mph10 NE RYEGATE
Record
  • May 31, 2018, 4:25 PM MDT. Wind, 100 mph, 10 NE RYEGATE. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:58149d38948ac6f9e0ee08e778281fa310b72dc90e941603853afa67ca3d17b8.
May 31, 2018, 4:35 PM MDTHail1.00 inFRANKLIN
Record
  • May 31, 2018, 4:35 PM MDT. Hail, 1.00 in, FRANKLIN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:759658.
May 31, 2018, 4:38 PM MDTHail1.00 in1 NNW CANYON CREEK
Record
  • May 31, 2018, 4:38 PM MDT. Hail, 1.00 in, 1 NNW CANYON CREEK. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:b1a4fbafd78e52290e1cab3f342807504c7bd84f9637bdea8cd28d6042c24ddb.
May 31, 2018, 4:38 PM MDTHail1.00 inCANYON CREEK
Record
  • May 31, 2018, 4:38 PM MDT. Hail, 1.00 in, CANYON CREEK. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:748168.
May 31, 2018, 4:38 PM MDTWind100 mph1 NNW CANYON CREEK
Record
  • May 31, 2018, 4:38 PM MDT. Wind, 100 mph, 1 NNW CANYON CREEK. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:3dcfd06e2a5146ac0d3ed073ee45a316cc2e6d6a00c2f762c9312752943295f9.
May 31, 2018, 5:30 PM MDTHail4.25 inROUNDUP
Record
  • May 31, 2018, 5:30 PM MDT. Hail, 4.25 in, ROUNDUP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:3270c1c850b650ef2df9fbb5138edef72d157351a5d1fc127a16b602d6763150.
May 31, 2018, 5:30 PM MDTHail1.00 in3 WSW BILLINGS
Record
  • May 31, 2018, 5:30 PM MDT. Hail, 1.00 in, 3 WSW BILLINGS. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:4375146f6772c9f9b22a4b33eec895c0bfbe71a07ff60db6ee7c66bd0761ef23.
May 31, 2018, 5:30 PM MDTHail1.00 in5.2 W ROUNDUP 4
Record
  • May 31, 2018, 5:30 PM MDT. Hail, 1.00 in, 5.2 W ROUNDUP 4. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:439ccc4d008d42dddea59b9bfd761e0ed2edaa2871bb5725610ea425c12dcb33.
May 31, 2018, 5:30 PM MDTHail1.00 inROUNDUP
Record
  • May 31, 2018, 5:30 PM MDT. Hail, 1.00 in, ROUNDUP. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751234.
May 31, 2018, 5:30 PM MDTWind100 mph5 W ROUNDUP
Record
  • May 31, 2018, 5:30 PM MDT. Wind, 100 mph, 5 W ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:05de8fb1c15822b44f8129aa0619c4144ac0f8bfc8e6cc5c008951a4f176bd59.
May 31, 2018, 5:30 PM MDTWind425 mphROUNDUP
Record
  • May 31, 2018, 5:30 PM MDT. Wind, 425 mph, ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:87bae3a7f2f741deb29aabcc43be4d5d971b1e7ee90ca784b204b6bead48311f.
May 31, 2018, 5:30 PM MDTWind100 mph3 WSW BILLINGS
Record
  • May 31, 2018, 5:30 PM MDT. Wind, 100 mph, 3 WSW BILLINGS. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:d507e84b2d3fbf86ca7b1e2e3b2d411b40525fef097bde297a7f39f496ab6f6a.
May 31, 2018, 5:37 PM MDTHail1.75 inROUNDUP
Record
  • May 31, 2018, 5:37 PM MDT. Hail, 1.75 in, ROUNDUP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:03a1742a1a3c1c609bcf60b5f6bfd995f7e34fc9bf3224e16d20069c9aa75ab2.
May 31, 2018, 5:37 PM MDTWind175 mphROUNDUP
Record
  • May 31, 2018, 5:37 PM MDT. Wind, 175 mph, ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:40978adf7ed50b5060d8f218e754adb011eda0997f5540492eefb19664a6cedd.
May 31, 2018, 5:40 PM MDTHail1.75 inROUNDUP
Record
  • May 31, 2018, 5:40 PM MDT. Hail, 1.75 in, ROUNDUP. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751221.
May 31, 2018, 5:42 PM MDTHail2.75 inROUNDUP
Record
  • May 31, 2018, 5:42 PM MDT. Hail, 2.75 in, ROUNDUP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:883539de2118b27765eeb934caa859e6e38362f0b3310a660a465a2471397053.
May 31, 2018, 5:42 PM MDTWind275 mphROUNDUP
Record
  • May 31, 2018, 5:42 PM MDT. Wind, 275 mph, ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:096f440c6d94576027242ba5b3738f05f7a5006048f47cbc5b756f11286932b1.
May 31, 2018, 5:44 PM MDTHail2.00 inROUNDUP
Record
  • May 31, 2018, 5:44 PM MDT. Hail, 2.00 in, ROUNDUP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:bf68bda41d727e0cd429865112d3036fc809bad08bb16c788d7cb93d231a6533.
May 31, 2018, 5:44 PM MDTWind200 mphROUNDUP
Record
  • May 31, 2018, 5:44 PM MDT. Wind, 200 mph, ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:9b84e600a293a00945ca82fde4762e6a3fea1a847e22581db82e1a67de81ed56.
May 31, 2018, 5:45 PM MDTHail1.75 inROUNDUP
Record
  • May 31, 2018, 5:45 PM MDT. Hail, 1.75 in, ROUNDUP. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751245.
May 31, 2018, 5:45 PM MDTWind175 mphROUNDUP
Record
  • May 31, 2018, 5:45 PM MDT. Wind, 175 mph, ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:b75581d4a3babd843f4b2275c8b9b3c41ea28180da46a19b343d2886fb3d8ed9.
May 31, 2018, 5:47 PM MDTHail2.50 inROUNDUP
Record
  • May 31, 2018, 5:47 PM MDT. Hail, 2.50 in, ROUNDUP. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751248.
May 31, 2018, 5:47 PM MDTWind250 mph1 N ROUNDUP
Record
  • May 31, 2018, 5:47 PM MDT. Wind, 250 mph, 1 N ROUNDUP. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:ea53d1f7200ff8494942c483af76417c79c4e88fa1a0a7292658be74b58e31a7.
May 31, 2018, 5:48 PM MDTHail1.75 inROUNDUP
Record
  • May 31, 2018, 5:48 PM MDT. Hail, 1.75 in, ROUNDUP. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:751285.
How We Count

This page uses published ground reports from 2016-01-01 through 2026-10-29. Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail counts at 1.00 in or larger. Wind counts at 58 mph or stronger. State days also include tornado reports.

Reports use the local civil date and clock. City pages use the city clock. State pages use each report location clock.

Exact repeated observations are counted once. Nearby reports with different times, coordinates or sizes remain separate observations.

NCEI rows are verified against NCEI Storm Events. SPC and NWS local reports are preliminary.

Radar signatures and warning polygons are not ground reports and are not in these counts.

A missing report does not show that no storm occurred. These pages show city or state exposure, not damage at an address.

This free page covers the state. It does not check a street address.

Limits

This page is not a certified record.

This page shows weather exposure, not damage or cause.

This page is not an expert opinion and it is not a meteorologist review.

Verify these rows with official NOAA and NWS records.

VectorWX is not affiliated with or endorsed by NOAA or NWS.

Radar-estimated hail size comes from MRMS MESH or NCEI nx3hail. It is an estimate of hail aloft. It is not a measurement of hail on a roof.