Pilot Index / Michigan / 2022

NCEI Storm Events Source. Day Totals Are Not Individually Verified.

Michigan Hail Map for 2022

33 published severe days across Michigan in 2022.

Updated Oct 28, 2026.

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

Showing 33 of 33 severe days. The map and details show hail reports only. Day totals also include wind and tornado reports.

Sep 21, 2022. 3 of 17 Listed. 2.00 in Hail

  • Hail, 2.00 in

    Sep 21, 2022, 10:38 AM EDT

    MASON

    Record
    • Sep 21, 2022, 10:38 AM EDT. Hail, 2.00 in, MASON. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1056100.

  • Hail, 1.75 in

    Sep 21, 2022, 8:06 AM EDT

    SKEELS

    Record
    • Sep 21, 2022, 8:06 AM EDT. Hail, 1.75 in, SKEELS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1053938.

  • Hail, 1.75 in

    Sep 21, 2022, 8:45 AM EDT

    SAND LAKE

    Record
    • Sep 21, 2022, 8:45 AM EDT. Hail, 1.75 in, SAND LAKE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1056096.
Dec 24, 2022. 0 of 10 Listed

Day total. Reports are not individually verified here.

Dec 23, 2022. 0 of 6 Listed

Day total. Reports are not individually verified here.

Dec 15, 2022. 0 of 3 Listed

Day total. Reports are not individually verified here.

Nov 30, 2022. 0 of 4 Listed

Day total. Reports are not individually verified here.

Oct 18, 2022. 0 of 7 Listed

Day total. Reports are not individually verified here.

Oct 12, 2022. 0 of 6 Listed

Day total. Reports are not individually verified here.

Sep 25, 2022. 0 of 6 Listed

Day total. Reports are not individually verified here.

Aug 29, 2022. 1 of 48 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Aug 29, 2022, 4:35 PM EDT

    SANFORD

    Record
    • Aug 29, 2022, 4:35 PM EDT. Hail, 1.00 in, SANFORD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1050919.
Aug 3, 2022. 1 of 48 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Aug 3, 2022, 10:50 AM EDT

    LUCAS

    Record
    • Aug 3, 2022, 10:50 AM EDT. Hail, 1.00 in, LUCAS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1053927.
Aug 2, 2022. 0 of 10 Listed

Day total. Reports are not individually verified here.

Aug 1, 2022. 0 of 6 Listed

Day total. Reports are not individually verified here.

Jul 23, 2022. 0 of 16 Listed

Day total. Reports are not individually verified here.

Jul 21, 2022. 1 of 14 Listed. 1.25 in Hail

  • Hail, 1.25 in

    Jul 21, 2022, 8:00 PM EDT

    ST JOSEPH

    Record
    • Jul 21, 2022, 8:00 PM EDT. Hail, 1.25 in, ST JOSEPH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1048495.
Jul 20, 2022. 1 of 8 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Jul 20, 2022, 3:32 PM EDT

    PORT SANILAC

    Record
    • Jul 20, 2022, 3:32 PM EDT. Hail, 1.00 in, PORT SANILAC. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1041288.
Jul 19, 2022. 3 of 11 Listed. 2.75 in Hail

  • Hail, 2.75 in

    Jul 19, 2022, 12:25 AM EDT

    L ANSE

    Record
    • Jul 19, 2022, 12:25 AM EDT. Hail, 2.75 in, L ANSE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1044382.

  • Hail, 2.50 in

    Jul 19, 2022, 12:25 AM EDT

    L'ANSE

    Record
    • Jul 19, 2022, 12:25 AM EDT. Hail, 2.50 in, L'ANSE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:921d65664bda9cf752e97944397d7c551a627e029004486e9b03744baa458662.

  • Hail, 2.00 in

    Jul 19, 2022, 12:25 AM EDT

    L'ANSE

    Record
    • Jul 19, 2022, 12:25 AM EDT. Hail, 2.00 in, L'ANSE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:4f93a79b97f5a7ee0a8bc648e604fa73cf0e3cd35a7e528177e0c347052edde2.
Jul 11, 2022. 0 of 5 Listed

Day total. Reports are not individually verified here.

Jun 30, 2022. 3 of 21 Listed. 1.25 in Hail

  • Hail, 1.25 in

    Jun 30, 2022, 10:05 PM EDT

    CHATHAM

    Record
    • Jun 30, 2022, 10:05 PM EDT. Hail, 1.25 in, CHATHAM. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035397.

  • Hail, 1.00 in

    Jun 30, 2022, 6:00 PM EDT

    FIRESTEEL

    Record
    • Jun 30, 2022, 6:00 PM EDT. Hail, 1.00 in, FIRESTEEL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035401.

  • Hail, 1.00 in

    Jun 30, 2022, 6:05 PM EDT

    FIRESTEEL

    Record
    • Jun 30, 2022, 6:05 PM EDT. Hail, 1.00 in, FIRESTEEL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035403.
Jun 16, 2022. 0 of 11 Listed

Day total. Reports are not individually verified here.

Jun 15, 2022. 1 of 11 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Jun 15, 2022, 10:50 PM EDT

    TRAVERSE CITY

    Record
    • Jun 15, 2022, 10:50 PM EDT. Hail, 1.00 in, TRAVERSE CITY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1042010.
Jun 13, 2022. 3 of 22 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Jun 13, 2022, 7:40 PM EDT

    3 ENE HARTFORD

    Record
    • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, 3 ENE HARTFORD. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:03f9c75380c9543f481b5b86e8ae45cfd84ea171d0c7f339057c8a45404d7640.

  • Hail, 1.00 in

    Jun 13, 2022, 7:40 PM EDT

    2 SSW PINE GROVE

    Record
    • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, 2 SSW PINE GROVE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:2d65dff04c1e89920773586f8d38bf816657874324df50931c68339430bc89e7.

  • Hail, 1.00 in

    Jun 13, 2022, 7:40 PM EDT

    LAWRENCE

    Record
    • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, LAWRENCE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:bab7a8973a04ce143c0e626aaeb8bc361b7f26f3a7b5878457bec6aa7fa56ffe.
Jun 1, 2022. 0 of 8 Listed

Day total. Reports are not individually verified here.

May 20, 2022. 3 of 18 Listed. 3.00 in Hail

  • Hail, 3.00 in

    May 20, 2022, 4:50 PM EDT

    ERAND LAKE

    Record
    • May 20, 2022, 4:50 PM EDT. Hail, 3.00 in, ERAND LAKE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031491.

  • Hail, 2.75 in

    May 20, 2022, 4:45 PM EDT

    POSEN

    Record
    • May 20, 2022, 4:45 PM EDT. Hail, 2.75 in, POSEN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031490.

  • Hail, 2.50 in

    May 20, 2022, 3:35 PM EDT

    ALBA

    Record
    • May 20, 2022, 3:35 PM EDT. Hail, 2.50 in, ALBA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031660.
May 12, 2022. 1 of 3 Listed. 1.00 in Hail

  • Hail, 1.00 in

    May 12, 2022, 4:47 PM EDT

    FELCH

    Record
    • May 12, 2022, 4:47 PM EDT. Hail, 1.00 in, FELCH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026587.
May 11, 2022. 3 of 6 Listed. 1.00 in Hail

  • Hail, 1.00 in

    May 11, 2022, 9:30 AM EDT

    MAPLE RIDGE

    Record
    • May 11, 2022, 9:30 AM EDT. Hail, 1.00 in, MAPLE RIDGE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026973.

  • Hail, 1.00 in

    May 11, 2022, 12:00 PM EDT

    REMUS

    Record
    • May 11, 2022, 12:00 PM EDT. Hail, 1.00 in, REMUS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026719.

  • Hail, 1.00 in

    May 11, 2022, 12:15 PM EDT

    REMUS

    Record
    • May 11, 2022, 12:15 PM EDT. Hail, 1.00 in, REMUS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026720.
May 10, 2022. 3 of 7 Listed. 1.75 in Hail

  • Hail, 1.75 in

    May 10, 2022, 5:02 PM EDT

    9 W GRANITE ISLAND

    Record
    • May 10, 2022, 5:02 PM EDT. Hail, 1.75 in, 9 W GRANITE ISLAND. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:3d5336307e3a69fbdbb0e7e0df21a2ea3c4317e74025dfd7993076e127e32905.

  • Hail, 1.75 in

    May 10, 2022, 7:50 PM EDT

    ONOLA

    Record
    • May 10, 2022, 7:50 PM EDT. Hail, 1.75 in, ONOLA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1025519.

  • Hail, 1.50 in

    May 10, 2022, 7:50 PM EDT

    4 ENE DEERTON

    Record
    • May 10, 2022, 7:50 PM EDT. Hail, 1.50 in, 4 ENE DEERTON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:7b9e606a6dc643bc191e645920dba758b1d488d51ff063333151f056e9ffeb9f.
May 9, 2022. 1 of 4 Listed. 1.75 in Hail

  • Hail, 1.75 in

    May 9, 2022, 5:02 PM EDT

    BIRCH

    Record
    • May 9, 2022, 5:02 PM EDT. Hail, 1.75 in, BIRCH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1025510.
Apr 24, 2022. 1 of 5 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Apr 24, 2022, 5:48 PM EDT

    ARGENTINE

    Record
    • Apr 24, 2022, 5:48 PM EDT. Hail, 1.00 in, ARGENTINE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1014718.
Apr 14, 2022. 0 of 5 Listed

Day total. Reports are not individually verified here.

Apr 11, 2022. 2 of 3 Listed. 1.00 in Hail

  • Hail, 1.00 in

    Apr 11, 2022, 4:45 AM EDT

    ALMA

    Record
    • Apr 11, 2022, 4:45 AM EDT. Hail, 1.00 in, ALMA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1013893.

  • Hail, 1.00 in

    Apr 11, 2022, 4:58 AM EDT

    ALMA

    Record
    • Apr 11, 2022, 4:58 AM EDT. Hail, 1.00 in, ALMA. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:20966d2da050da9cc94d1ad57d0824480f523dd506c0652036bf9f2a8ba0b2e7.
Mar 6, 2022. 0 of 15 Listed

Day total. Reports are not individually verified here.

Feb 19, 2022. 0 of 5 Listed

Day total. Reports are not individually verified here.

Feb 18, 2022. 0 of 4 Listed

Day total. Reports are not individually verified here.

TimeWhatSize or SpeedWhereDetails
Dec 24, 202210 severe reportsMichigan0 of 10 listed. Day total. Reports are not individually verified here.
Dec 23, 20226 severe reportsMichigan0 of 6 listed. Day total. Reports are not individually verified here.
Dec 15, 20223 severe reportsMichigan0 of 3 listed. Day total. Reports are not individually verified here.
Nov 30, 20224 severe reportsMichigan0 of 4 listed. Day total. Reports are not individually verified here.
Oct 18, 20227 severe reportsMichigan0 of 7 listed. Day total. Reports are not individually verified here.
Oct 12, 20226 severe reportsMichigan0 of 6 listed. Day total. Reports are not individually verified here.
Sep 25, 20226 severe reportsMichigan0 of 6 listed. Day total. Reports are not individually verified here.
Sep 21, 202217 severe reports2.00 in hailMichigan
3 of 17 Listed
  • Sep 21, 2022, 10:38 AM EDT. Hail, 2.00 in, MASON. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1056100.
  • Sep 21, 2022, 8:06 AM EDT. Hail, 1.75 in, SKEELS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1053938.
  • Sep 21, 2022, 8:45 AM EDT. Hail, 1.75 in, SAND LAKE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1056096.
Aug 29, 202248 severe reports1.00 in hailMichigan
1 of 48 Listed
  • Aug 29, 2022, 4:35 PM EDT. Hail, 1.00 in, SANFORD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1050919.
Aug 3, 202248 severe reports1.00 in hailMichigan
1 of 48 Listed
  • Aug 3, 2022, 10:50 AM EDT. Hail, 1.00 in, LUCAS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1053927.
Aug 2, 202210 severe reportsMichigan0 of 10 listed. Day total. Reports are not individually verified here.
Aug 1, 20226 severe reportsMichigan0 of 6 listed. Day total. Reports are not individually verified here.
Jul 23, 202216 severe reportsMichigan0 of 16 listed. Day total. Reports are not individually verified here.
Jul 21, 202214 severe reports1.25 in hailMichigan
1 of 14 Listed
  • Jul 21, 2022, 8:00 PM EDT. Hail, 1.25 in, ST JOSEPH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1048495.
Jul 20, 20228 severe reports1.00 in hailMichigan
1 of 8 Listed
  • Jul 20, 2022, 3:32 PM EDT. Hail, 1.00 in, PORT SANILAC. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1041288.
Jul 19, 202211 severe reports2.75 in hailMichigan
3 of 11 Listed
  • Jul 19, 2022, 12:25 AM EDT. Hail, 2.75 in, L ANSE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1044382.
  • Jul 19, 2022, 12:25 AM EDT. Hail, 2.50 in, L'ANSE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:921d65664bda9cf752e97944397d7c551a627e029004486e9b03744baa458662.
  • Jul 19, 2022, 12:25 AM EDT. Hail, 2.00 in, L'ANSE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:4f93a79b97f5a7ee0a8bc648e604fa73cf0e3cd35a7e528177e0c347052edde2.
Jul 11, 20225 severe reportsMichigan0 of 5 listed. Day total. Reports are not individually verified here.
Jun 30, 202221 severe reports1.25 in hailMichigan
3 of 21 Listed
  • Jun 30, 2022, 10:05 PM EDT. Hail, 1.25 in, CHATHAM. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035397.
  • Jun 30, 2022, 6:00 PM EDT. Hail, 1.00 in, FIRESTEEL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035401.
  • Jun 30, 2022, 6:05 PM EDT. Hail, 1.00 in, FIRESTEEL. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1035403.
Jun 16, 202211 severe reportsMichigan0 of 11 listed. Day total. Reports are not individually verified here.
Jun 15, 202211 severe reports1.00 in hailMichigan
1 of 11 Listed
  • Jun 15, 2022, 10:50 PM EDT. Hail, 1.00 in, TRAVERSE CITY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1042010.
Jun 13, 202222 severe reports1.00 in hailMichigan
3 of 22 Listed
  • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, 3 ENE HARTFORD. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:03f9c75380c9543f481b5b86e8ae45cfd84ea171d0c7f339057c8a45404d7640.
  • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, 2 SSW PINE GROVE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:2d65dff04c1e89920773586f8d38bf816657874324df50931c68339430bc89e7.
  • Jun 13, 2022, 7:40 PM EDT. Hail, 1.00 in, LAWRENCE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:bab7a8973a04ce143c0e626aaeb8bc361b7f26f3a7b5878457bec6aa7fa56ffe.
Jun 1, 20228 severe reportsMichigan0 of 8 listed. Day total. Reports are not individually verified here.
May 20, 202218 severe reports3.00 in hailMichigan
3 of 18 Listed
  • May 20, 2022, 4:50 PM EDT. Hail, 3.00 in, ERAND LAKE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031491.
  • May 20, 2022, 4:45 PM EDT. Hail, 2.75 in, POSEN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031490.
  • May 20, 2022, 3:35 PM EDT. Hail, 2.50 in, ALBA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1031660.
May 12, 20223 severe reports1.00 in hailMichigan
1 of 3 Listed
  • May 12, 2022, 4:47 PM EDT. Hail, 1.00 in, FELCH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026587.
May 11, 20226 severe reports1.00 in hailMichigan
3 of 6 Listed
  • May 11, 2022, 9:30 AM EDT. Hail, 1.00 in, MAPLE RIDGE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026973.
  • May 11, 2022, 12:00 PM EDT. Hail, 1.00 in, REMUS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026719.
  • May 11, 2022, 12:15 PM EDT. Hail, 1.00 in, REMUS. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1026720.
May 10, 20227 severe reports1.75 in hailMichigan
3 of 7 Listed
  • May 10, 2022, 5:02 PM EDT. Hail, 1.75 in, 9 W GRANITE ISLAND. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:3d5336307e3a69fbdbb0e7e0df21a2ea3c4317e74025dfd7993076e127e32905.
  • May 10, 2022, 7:50 PM EDT. Hail, 1.75 in, ONOLA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1025519.
  • May 10, 2022, 7:50 PM EDT. Hail, 1.50 in, 4 ENE DEERTON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:7b9e606a6dc643bc191e645920dba758b1d488d51ff063333151f056e9ffeb9f.
May 9, 20224 severe reports1.75 in hailMichigan
1 of 4 Listed
  • May 9, 2022, 5:02 PM EDT. Hail, 1.75 in, BIRCH. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1025510.
Apr 24, 20225 severe reports1.00 in hailMichigan
1 of 5 Listed
  • Apr 24, 2022, 5:48 PM EDT. Hail, 1.00 in, ARGENTINE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1014718.
Apr 14, 20225 severe reportsMichigan0 of 5 listed. Day total. Reports are not individually verified here.
Apr 11, 20223 severe reports1.00 in hailMichigan
2 of 3 Listed
  • Apr 11, 2022, 4:45 AM EDT. Hail, 1.00 in, ALMA. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:1013893.
  • Apr 11, 2022, 4:58 AM EDT. Hail, 1.00 in, ALMA. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:20966d2da050da9cc94d1ad57d0824480f523dd506c0652036bf9f2a8ba0b2e7.
Mar 6, 202215 severe reportsMichigan0 of 15 listed. Day total. Reports are not individually verified here.
Feb 19, 20225 severe reportsMichigan0 of 5 listed. Day total. Reports are not individually verified here.
Feb 18, 20224 severe reportsMichigan0 of 4 listed. Day total. Reports are not individually verified here.
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.

Links

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.