Pilot Index / Iowa / May 20, 2024

Preliminary

Storms in Iowa on May 20, 2024

40 published severe reports across Iowa on May 20, 2024.

Updated Oct 28, 2026.

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

Hail reports: 28. Wind reports: 10. Tornado reports: 2.

The table and map show 40 of 40 reports.

TimeWhatSize or SpeedWhereDetails
May 20, 2024, 12:30 AM CDTWind70 mphTIFFIN
Record
  • May 20, 2024, 12:30 AM CDT. Wind, 70 mph, TIFFIN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170529.
May 20, 2024, 12:36 AM CDTWind70 mphHIAWATHA
Record
  • May 20, 2024, 12:36 AM CDT. Wind, 70 mph, HIAWATHA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170530.
May 20, 2024, 12:47 AM CDTWind60 mph3 E Cedar Rapids
Record
  • May 20, 2024, 12:47 AM CDT. Wind, 60 mph, 3 E Cedar Rapids. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:31bd725a0bc326674392a35989b84e4a8fc6ccf1f41d607f0f6c6adfa9a5ec71.
May 20, 2024, 12:47 AM CDTWind60 mphCEDAR RAPIDS
Record
  • May 20, 2024, 12:47 AM CDT. Wind, 60 mph, CEDAR RAPIDS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170531.
May 20, 2024, 12:48 AM CDTWind60 mphHiawatha
Record
  • May 20, 2024, 12:48 AM CDT. Wind, 60 mph, Hiawatha. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:42779bad3b92200c1a67605c020b88ce2c2ce88aee163668970cda5b0ca4a7b9.
May 20, 2024, 12:48 AM CDTHail1.25 inWHEATLAND
Record
  • May 20, 2024, 12:48 AM CDT. Hail, 1.25 in, WHEATLAND. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170524.
May 20, 2024, 12:48 AM CDTWind60 mphHIAWATHA
Record
  • May 20, 2024, 12:48 AM CDT. Wind, 60 mph, HIAWATHA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170532.
May 20, 2024, 1:01 AM CDTWind60 mphLISBON
Record
  • May 20, 2024, 1:01 AM CDT. Wind, 60 mph, LISBON. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1170525.
May 20, 2024, 6:42 PM CDTHail1.00 inSANBORN
Record
  • May 20, 2024, 6:42 PM CDT. Hail, 1.00 in, SANBORN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180167.
May 20, 2024, 6:51 PM CDTHail1.00 inSANBORN
Record
  • May 20, 2024, 6:51 PM CDT. Hail, 1.00 in, SANBORN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180168.
May 20, 2024, 6:58 PM CDTHail1.75 inSANBORN
Record
  • May 20, 2024, 6:58 PM CDT. Hail, 1.75 in, SANBORN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180170.
May 20, 2024, 6:58 PM CDTHail1.75 inSanborn
Record
  • May 20, 2024, 6:58 PM CDT. Hail, 1.75 in, Sanborn. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:3e3ab44b08771827bb285185b0926fe368146256b1b38f1ce4b6309895fca6ab.
May 20, 2024, 7:14 PM CDTHail1.00 inSANBORN
Record
  • May 20, 2024, 7:14 PM CDT. Hail, 1.00 in, SANBORN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180171.
May 20, 2024, 7:39 PM CDTHail2.00 inMONETA
Record
  • May 20, 2024, 7:39 PM CDT. Hail, 2.00 in, MONETA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180172.
May 20, 2024, 7:40 PM CDTHail2.50 inROYAL
Record
  • May 20, 2024, 7:40 PM CDT. Hail, 2.50 in, ROYAL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180173.
May 20, 2024, 7:44 PM CDTHail3.00 inROYAL
Record
  • May 20, 2024, 7:44 PM CDT. Hail, 3.00 in, ROYAL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180174.
May 20, 2024, 7:47 PM CDTHail2.00 in4 W Royal
Record
  • May 20, 2024, 7:47 PM CDT. Hail, 2.00 in, 4 W Royal. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:e726d30baca827a041a44f44c6527b9214eda4a5d1ecbf6e9da3e4c0aed7b7d3.
May 20, 2024, 7:48 PM CDTHail2.00 inROYAL
Record
  • May 20, 2024, 7:48 PM CDT. Hail, 2.00 in, ROYAL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180175.
May 20, 2024, 7:50 PM CDTHail1.00 inREMSEN
Record
  • May 20, 2024, 7:50 PM CDT. Hail, 1.00 in, REMSEN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180176.
May 20, 2024, 7:54 PM CDTHail3.00 in3 W Royal
Record
  • May 20, 2024, 7:54 PM CDT. Hail, 3.00 in, 3 W Royal. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:b8092ed5c133493d384201a455d4cf47fdd9ba6df0153aa09613c11e10a40580.
May 20, 2024, 8:15 PM CDTHail1.50 inGREENVILLE
Record
  • May 20, 2024, 8:15 PM CDT. Hail, 1.50 in, GREENVILLE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180177.
May 20, 2024, 8:18 PM CDTTornado2 SW Tennant
Record
  • May 20, 2024, 8:18 PM CDT. Tornado, 2 SW Tennant. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:522b4b4c64f136b0bdeebb14f959a99ead70da0c1374f41be9834f159ac6f743.
May 20, 2024, 8:18 PM CDTTornadoTENNANT
Record
  • May 20, 2024, 8:18 PM CDT. Tornado, TENNANT. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1181074.
May 20, 2024, 8:32 PM CDTHail1.50 inWEBB
Record
  • May 20, 2024, 8:32 PM CDT. Hail, 1.50 in, WEBB. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180178.
May 20, 2024, 8:50 PM CDTHail1.25 inLARRABEE
Record
  • May 20, 2024, 8:50 PM CDT. Hail, 1.25 in, LARRABEE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180179.
May 20, 2024, 8:50 PM CDTHail1.00 inTITONKA
Record
  • May 20, 2024, 8:50 PM CDT. Hail, 1.00 in, TITONKA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180816.
May 20, 2024, 9:05 PM CDTHail1.25 inSANBORN
Record
  • May 20, 2024, 9:05 PM CDT. Hail, 1.25 in, SANBORN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180180.
May 20, 2024, 9:15 PM CDTHail2.00 inRoyal
Record
  • May 20, 2024, 9:15 PM CDT. Hail, 2.00 in, Royal. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:6549bf50067c2b689059ead033163f46412b7fec43bcf3284c8ee234bbfb2570.
May 20, 2024, 9:21 PM CDTHail2.00 inMallard
Record
  • May 20, 2024, 9:21 PM CDT. Hail, 2.00 in, Mallard. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:df981d0ded62d11565a2ac46d6f50f69507ce7467647990b46135b5a714d12fc.
May 20, 2024, 9:21 PM CDTHail1.75 inMALLARD
Record
  • May 20, 2024, 9:21 PM CDT. Hail, 1.75 in, MALLARD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180818.
May 20, 2024, 9:30 PM CDTHail1.50 inAURELIA
Record
  • May 20, 2024, 9:30 PM CDT. Hail, 1.50 in, AURELIA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180181.
May 20, 2024, 9:35 PM CDTHail1.50 in7 SSW Peterson
Record
  • May 20, 2024, 9:35 PM CDT. Hail, 1.50 in, 7 SSW Peterson. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:5d06bdccbd754db6f95133596b5b134ed574941f3e4af6a6dcb6d16965c67e21.
May 20, 2024, 9:41 PM CDTHail1.00 in1 NNE Harlan
Record
  • May 20, 2024, 9:41 PM CDT. Hail, 1.00 in, 1 NNE Harlan. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:201d5c922b47770b16605c840261ceaec5c812b0287badbb1ca316460d0d90b5.
May 20, 2024, 9:41 PM CDTHail1.00 inHARLAN
Record
  • May 20, 2024, 9:41 PM CDT. Hail, 1.00 in, HARLAN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1181061.
May 20, 2024, 9:49 PM CDTHail2.00 in3 N Harlan
Record
  • May 20, 2024, 9:49 PM CDT. Hail, 2.00 in, 3 N Harlan. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:a56758e19fba965f8b1aaa63f66f9c3d63082a5628d6c5046ea60c18ea78db0f.
May 20, 2024, 9:49 PM CDTHail2.00 inHARLAN
Record
  • May 20, 2024, 9:49 PM CDT. Hail, 2.00 in, HARLAN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1181062.
May 20, 2024, 10:42 PM CDTWind72 mph1 W Sergeant Bluff
Record
  • May 20, 2024, 10:42 PM CDT. Wind, 72 mph, 1 W Sergeant Bluff. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:e20dbfd2ba3b2b38701eb142bd67701faa4e7432c7da001af36ed085ac17fdec.
May 20, 2024, 10:42 PM CDTHail1.25 inSERGEANT BLUFF
Record
  • May 20, 2024, 10:42 PM CDT. Hail, 1.25 in, SERGEANT BLUFF. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180182.
May 20, 2024, 10:42 PM CDTWind72 mph(SUX)SIOUX CITY ARPT
Record
  • May 20, 2024, 10:42 PM CDT. Wind, 72 mph, (SUX)SIOUX CITY ARPT. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180183.
May 20, 2024, 10:42 PM CDTWind75 mphSERGEANT BLUFF
Record
  • May 20, 2024, 10:42 PM CDT. Wind, 75 mph, SERGEANT BLUFF. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1180184.
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.