Pilot Index / Massachusetts / 2020

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

Massachusetts Hail Map for 2020

25 published severe days across Massachusetts in 2020.

Updated Oct 28, 2026.

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

Showing 25 of 25 severe days. The map and details show hail reports only. Day totals also include wind and tornado reports.

Aug 23, 2020. 2 of 6 Listed. 1.00 in Hail

Hail, 1.00 in

Aug 23, 2020, 4:45 PM EDT

WAKEFIELD
Record
- Aug 23, 2020, 4:45 PM EDT. Hail, 1.00 in, WAKEFIELD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916257.
Hail, 1.00 in

Aug 23, 2020, 5:41 PM EDT

WORCESTER
Record
- Aug 23, 2020, 5:41 PM EDT. Hail, 1.00 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916261.

Dec 25, 2020. 0 of 13 Listed

Day total. Reports are not individually verified here.

Dec 17, 2020. 0 of 5 Listed

Day total. Reports are not individually verified here.

Dec 5, 2020. 0 of 7 Listed

Day total. Reports are not individually verified here.

Nov 30, 2020. 0 of 16 Listed

Day total. Reports are not individually verified here.

Nov 23, 2020. 0 of 6 Listed

Day total. Reports are not individually verified here.

Nov 16, 2020. 0 of 3 Listed

Day total. Reports are not individually verified here.

Nov 15, 2020. 0 of 15 Listed

Day total. Reports are not individually verified here.

Oct 7, 2020. 0 of 80 Listed

Day total. Reports are not individually verified here.

Sep 30, 2020. 0 of 11 Listed

Day total. Reports are not individually verified here.

Aug 22, 2020. 3 of 7 Listed. 1.75 in Hail

Hail, 1.75 in

Aug 22, 2020, 4:25 PM EDT

MIDDLEBORO
Record
- Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBORO. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916115.
Hail, 1.75 in

Aug 22, 2020, 4:25 PM EDT

MIDDLEBOROUGH
Record
- Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBOROUGH. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:f5872a42a5b79dfedafa1a83b47a1ab95b1da3eb7f37149ba3d9f9f34cad97c8.
Hail, 1.00 in

Aug 22, 2020, 4:10 PM EDT

WARRENTOWN
Record
- Aug 22, 2020, 4:10 PM EDT. Hail, 1.00 in, WARRENTOWN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916110.

Aug 2, 2020. 0 of 5 Listed

Day total. Reports are not individually verified here.

Jul 23, 2020. 0 of 3 Listed

Day total. Reports are not individually verified here.

Jul 14, 2020. 3 of 3 Listed. 1.25 in Hail

Hail, 1.25 in

Jul 14, 2020, 12:15 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:15 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:903953.
Hail, 1.25 in

Jul 14, 2020, 12:25 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:25 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:d46bd668f0139610459eee249876f9e8e34549e7c74710b9c72c322c3bf81983.
Hail, 1.00 in

Jul 14, 2020, 12:15 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:15 PM EDT. Hail, 1.00 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:82dbe98e1293cd1c2a03645cc4a57f8da49ecfb34ffe92df6fb15de27cebd849.

Jun 29, 2020. 3 of 6 Listed. 1.25 in Hail

Hail, 1.25 in

Jun 29, 2020, 1:59 PM EDT

ROWE
Record
- Jun 29, 2020, 1:59 PM EDT. Hail, 1.25 in, ROWE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900185.
Hail, 1.00 in

Jun 29, 2020, 2:00 PM EDT

ROWE
Record
- Jun 29, 2020, 2:00 PM EDT. Hail, 1.00 in, ROWE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:b825edb4ff62e23a1f2f9ccd9c31e044314fabffa3ca1293dc47a6f4cbe4c049.
Hail, 1.00 in

Jun 29, 2020, 2:29 PM EDT

HAWLEY
Record
- Jun 29, 2020, 2:29 PM EDT. Hail, 1.00 in, HAWLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900187.

Jun 28, 2020. 3 of 10 Listed. 2.00 in Hail

Hail, 2.00 in

Jun 28, 2020, 5:10 PM EDT

MEDWAY
Record
- Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, MEDWAY. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:475ee5efbc9f3a829a8464c875561d4a6273dc518a524b032eba65c525dc8f09.
Hail, 2.00 in

Jun 28, 2020, 5:10 PM EDT

WEST MEDWAY
Record
- Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, WEST MEDWAY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:897339.
Hail, 1.75 in

Jun 28, 2020, 3:58 PM EDT

EASTHAMPTON
Record
- Jun 28, 2020, 3:58 PM EDT. Hail, 1.75 in, EASTHAMPTON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:263c3c3ac71f0f9c32aa6b31575ae655d658cbbe1d14f439afa536978be3115a.

Jun 6, 2020. 2 of 5 Listed. 1.00 in Hail

Hail, 1.00 in

Jun 6, 2020, 8:56 PM EDT

STOW
Record
- Jun 6, 2020, 8:56 PM EDT. Hail, 1.00 in, STOW. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891612.
Hail, 1.00 in

Jun 6, 2020, 9:11 PM EDT

EAST SUDBURY
Record
- Jun 6, 2020, 9:11 PM EDT. Hail, 1.00 in, EAST SUDBURY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891613.

May 15, 2020. 0 of 10 Listed

Day total. Reports are not individually verified here.

Apr 13, 2020. 0 of 29 Listed

Day total. Reports are not individually verified here.

Apr 9, 2020. 0 of 7 Listed

Day total. Reports are not individually verified here.

Mar 29, 2020. 3 of 6 Listed. 1.75 in Hail

Hail, 1.75 in

Mar 29, 2020, 8:56 PM EDT

WORCESTER
Record
- Mar 29, 2020, 8:56 PM EDT. Hail, 1.75 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874033.
Hail, 1.25 in

Mar 29, 2020, 8:50 PM EDT

LEICESTER
Record
- Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, LEICESTER. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:a6b5100733d867443694533ff57bbfe5cf1745118459d63b6e4ee203792f4445.
Hail, 1.25 in

Mar 29, 2020, 8:50 PM EDT

GREENVILLE
Record
- Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, GREENVILLE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874031.

Mar 7, 2020. 0 of 4 Listed

Day total. Reports are not individually verified here.

Mar 6, 2020. 0 of 12 Listed

Day total. Reports are not individually verified here.

Feb 7, 2020. 0 of 77 Listed

Day total. Reports are not individually verified here.

Jan 12, 2020. 0 of 9 Listed

Day total. Reports are not individually verified here.

Time	What	Size or Speed	Where	Details
Dec 25, 2020	13 severe reports		Massachusetts	0 of 13 listed. Day total. Reports are not individually verified here.
Dec 17, 2020	5 severe reports		Massachusetts	0 of 5 listed. Day total. Reports are not individually verified here.
Dec 5, 2020	7 severe reports		Massachusetts	0 of 7 listed. Day total. Reports are not individually verified here.
Nov 30, 2020	16 severe reports		Massachusetts	0 of 16 listed. Day total. Reports are not individually verified here.
Nov 23, 2020	6 severe reports		Massachusetts	0 of 6 listed. Day total. Reports are not individually verified here.
Nov 16, 2020	3 severe reports		Massachusetts	0 of 3 listed. Day total. Reports are not individually verified here.
Nov 15, 2020	15 severe reports		Massachusetts	0 of 15 listed. Day total. Reports are not individually verified here.
Oct 7, 2020	80 severe reports		Massachusetts	0 of 80 listed. Day total. Reports are not individually verified here.
Sep 30, 2020	11 severe reports		Massachusetts	0 of 11 listed. Day total. Reports are not individually verified here.
Aug 23, 2020	6 severe reports	1.00 in hail	Massachusetts	2 of 6 Listed Aug 23, 2020, 4:45 PM EDT. Hail, 1.00 in, WAKEFIELD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916257. Aug 23, 2020, 5:41 PM EDT. Hail, 1.00 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916261.
Aug 22, 2020	7 severe reports	1.75 in hail	Massachusetts	3 of 7 Listed Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBORO. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916115. Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBOROUGH. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:f5872a42a5b79dfedafa1a83b47a1ab95b1da3eb7f37149ba3d9f9f34cad97c8. Aug 22, 2020, 4:10 PM EDT. Hail, 1.00 in, WARRENTOWN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916110.
Aug 2, 2020	5 severe reports		Massachusetts	0 of 5 listed. Day total. Reports are not individually verified here.
Jul 23, 2020	3 severe reports		Massachusetts	0 of 3 listed. Day total. Reports are not individually verified here.
Jul 14, 2020	3 severe reports	1.25 in hail	Massachusetts	3 of 3 Listed Jul 14, 2020, 12:15 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:903953. Jul 14, 2020, 12:25 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:d46bd668f0139610459eee249876f9e8e34549e7c74710b9c72c322c3bf81983. Jul 14, 2020, 12:15 PM EDT. Hail, 1.00 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:82dbe98e1293cd1c2a03645cc4a57f8da49ecfb34ffe92df6fb15de27cebd849.
Jun 29, 2020	6 severe reports	1.25 in hail	Massachusetts	3 of 6 Listed Jun 29, 2020, 1:59 PM EDT. Hail, 1.25 in, ROWE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900185. Jun 29, 2020, 2:00 PM EDT. Hail, 1.00 in, ROWE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:b825edb4ff62e23a1f2f9ccd9c31e044314fabffa3ca1293dc47a6f4cbe4c049. Jun 29, 2020, 2:29 PM EDT. Hail, 1.00 in, HAWLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900187.
Jun 28, 2020	10 severe reports	2.00 in hail	Massachusetts	3 of 10 Listed Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, MEDWAY. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:475ee5efbc9f3a829a8464c875561d4a6273dc518a524b032eba65c525dc8f09. Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, WEST MEDWAY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:897339. Jun 28, 2020, 3:58 PM EDT. Hail, 1.75 in, EASTHAMPTON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:263c3c3ac71f0f9c32aa6b31575ae655d658cbbe1d14f439afa536978be3115a.
Jun 6, 2020	5 severe reports	1.00 in hail	Massachusetts	2 of 5 Listed Jun 6, 2020, 8:56 PM EDT. Hail, 1.00 in, STOW. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891612. Jun 6, 2020, 9:11 PM EDT. Hail, 1.00 in, EAST SUDBURY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891613.
May 15, 2020	10 severe reports		Massachusetts	0 of 10 listed. Day total. Reports are not individually verified here.
Apr 13, 2020	29 severe reports		Massachusetts	0 of 29 listed. Day total. Reports are not individually verified here.
Apr 9, 2020	7 severe reports		Massachusetts	0 of 7 listed. Day total. Reports are not individually verified here.
Mar 29, 2020	6 severe reports	1.75 in hail	Massachusetts	3 of 6 Listed Mar 29, 2020, 8:56 PM EDT. Hail, 1.75 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874033. Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, LEICESTER. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:a6b5100733d867443694533ff57bbfe5cf1745118459d63b6e4ee203792f4445. Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, GREENVILLE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874031.
Mar 7, 2020	4 severe reports		Massachusetts	0 of 4 listed. Day total. Reports are not individually verified here.
Mar 6, 2020	12 severe reports		Massachusetts	0 of 12 listed. Day total. Reports are not individually verified here.
Feb 7, 2020	77 severe reports		Massachusetts	0 of 77 listed. Day total. Reports are not individually verified here.
Jan 12, 2020	9 severe reports		Massachusetts	0 of 9 listed. Day total. Reports are not individually verified here.

13 Severe Reports

Dec 25, 2020

Massachusetts
5 Severe Reports

Dec 17, 2020

Massachusetts
7 Severe Reports

Dec 5, 2020

Massachusetts
16 Severe Reports

Nov 30, 2020

Massachusetts
6 Severe Reports

Nov 23, 2020

Massachusetts
3 Severe Reports

Nov 16, 2020

Massachusetts
15 Severe Reports

Nov 15, 2020

Massachusetts
80 Severe Reports

Oct 7, 2020

Massachusetts
11 Severe Reports

Sep 30, 2020

Massachusetts
Hail, 1.00 in

Aug 23, 2020, 4:45 PM EDT

WAKEFIELD
Record
- Aug 23, 2020, 4:45 PM EDT. Hail, 1.00 in, WAKEFIELD. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916257.
Hail, 1.00 in

Aug 23, 2020, 5:41 PM EDT

WORCESTER
Record
- Aug 23, 2020, 5:41 PM EDT. Hail, 1.00 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916261.
Hail, 1.75 in

Aug 22, 2020, 4:25 PM EDT

MIDDLEBORO
Record
- Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBORO. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916115.
Hail, 1.75 in

Aug 22, 2020, 4:25 PM EDT

MIDDLEBOROUGH
Record
- Aug 22, 2020, 4:25 PM EDT. Hail, 1.75 in, MIDDLEBOROUGH. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:f5872a42a5b79dfedafa1a83b47a1ab95b1da3eb7f37149ba3d9f9f34cad97c8.
Hail, 1.00 in

Aug 22, 2020, 4:10 PM EDT

WARRENTOWN
Record
- Aug 22, 2020, 4:10 PM EDT. Hail, 1.00 in, WARRENTOWN. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:916110.
5 Severe Reports

Aug 2, 2020

Massachusetts
3 Severe Reports

Jul 23, 2020

Massachusetts
Hail, 1.25 in

Jul 14, 2020, 12:15 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:15 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:903953.
Hail, 1.25 in

Jul 14, 2020, 12:25 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:25 PM EDT. Hail, 1.25 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:d46bd668f0139610459eee249876f9e8e34549e7c74710b9c72c322c3bf81983.
Hail, 1.00 in

Jul 14, 2020, 12:15 PM EDT

SOUTH HADLEY
Record
- Jul 14, 2020, 12:15 PM EDT. Hail, 1.00 in, SOUTH HADLEY. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:82dbe98e1293cd1c2a03645cc4a57f8da49ecfb34ffe92df6fb15de27cebd849.
Hail, 1.25 in

Jun 29, 2020, 1:59 PM EDT

ROWE
Record
- Jun 29, 2020, 1:59 PM EDT. Hail, 1.25 in, ROWE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900185.
Hail, 1.00 in

Jun 29, 2020, 2:00 PM EDT

ROWE
Record
- Jun 29, 2020, 2:00 PM EDT. Hail, 1.00 in, ROWE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:b825edb4ff62e23a1f2f9ccd9c31e044314fabffa3ca1293dc47a6f4cbe4c049.
Hail, 1.00 in

Jun 29, 2020, 2:29 PM EDT

HAWLEY
Record
- Jun 29, 2020, 2:29 PM EDT. Hail, 1.00 in, HAWLEY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:900187.
Hail, 2.00 in

Jun 28, 2020, 5:10 PM EDT

MEDWAY
Record
- Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, MEDWAY. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:475ee5efbc9f3a829a8464c875561d4a6273dc518a524b032eba65c525dc8f09.
Hail, 2.00 in

Jun 28, 2020, 5:10 PM EDT

WEST MEDWAY
Record
- Jun 28, 2020, 5:10 PM EDT. Hail, 2.00 in, WEST MEDWAY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:897339.
Hail, 1.75 in

Jun 28, 2020, 3:58 PM EDT

EASTHAMPTON
Record
- Jun 28, 2020, 3:58 PM EDT. Hail, 1.75 in, EASTHAMPTON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:263c3c3ac71f0f9c32aa6b31575ae655d658cbbe1d14f439afa536978be3115a.
Hail, 1.00 in

Jun 6, 2020, 8:56 PM EDT

STOW
Record
- Jun 6, 2020, 8:56 PM EDT. Hail, 1.00 in, STOW. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891612.
Hail, 1.00 in

Jun 6, 2020, 9:11 PM EDT

EAST SUDBURY
Record
- Jun 6, 2020, 9:11 PM EDT. Hail, 1.00 in, EAST SUDBURY. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:891613.
10 Severe Reports

May 15, 2020

Massachusetts
29 Severe Reports

Apr 13, 2020

Massachusetts
7 Severe Reports

Apr 9, 2020

Massachusetts
Hail, 1.75 in

Mar 29, 2020, 8:56 PM EDT

WORCESTER
Record
- Mar 29, 2020, 8:56 PM EDT. Hail, 1.75 in, WORCESTER. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874033.
Hail, 1.25 in

Mar 29, 2020, 8:50 PM EDT

LEICESTER
Record
- Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, LEICESTER. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:a6b5100733d867443694533ff57bbfe5cf1745118459d63b6e4ee203792f4445.
Hail, 1.25 in

Mar 29, 2020, 8:50 PM EDT

GREENVILLE
Record
- Mar 29, 2020, 8:50 PM EDT. Hail, 1.25 in, GREENVILLE. Source: NCEI Storm Events. Status: Verified against NCEI Storm Events. Record id: ncei:874031.
4 Severe Reports

Mar 7, 2020

Massachusetts
12 Severe Reports

Mar 6, 2020

Massachusetts
77 Severe Reports

Feb 7, 2020

Massachusetts
9 Severe Reports

Jan 12, 2020

Massachusetts

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.