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NOAA/NWS STORM PREDICTION CENTER REPORTS + U.S. CENSUS DATA

Hail, Wind & Tornado Reports in and near Mercersburg, PA

Public hail, wind, and tornado reports in and near Mercersburg, PA from May 24, 1970 through August 23, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 17236 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
11
Wind Reports
36
Tornado Reports
2
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Mercersburg, PA · 1970–present Updated  Daily · last Aug 23, 2026

Latest NWS Hail Reports in and near Mercersburg, PA

11 reports
Free hail report for your home →
0.88″ hail
May 22, 2013
4:52 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: Nickel size hail (0.88 inch) was reported south of Big Cove Tannery.
NWS Hail Report Location: .69 N Yeakle Mill, PA
0.75″ hail
Jun 29, 2012
8:25 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .69 N Mercersburg, PA
0.88″ hail
May 29, 2012
2:45 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: Spotter reported nickel-sized hail in Mercersburg.
NWS Hail Report Location: .69 N Mercersburg, PA
1.00″ hail
May 26, 2011
5:10 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .69 N Mercersburg, PA
1.75″ hail
May 26, 2011
4:44 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .69 N Mercersburg, PA
1.50″ hail
May 26, 2011
4:38 PM EST-5
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: Large hail ranged in size between 1-2 inch diameter.
NWS Hail Report Location: .69 N Mercersburg, PA
0.88″ hail
Jul 18, 2006
3:50 PM EST
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 5 N Mercersburg, PA
0.75″ hail
Jul 14, 2000
7:30 PM EST
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: Dime size hail covered the ground.
NWS Hail Report Location: Welsh Run, PA
0.75″ hail
May 31, 1998
9:30 PM EST
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Mercersburg, PA
0.75″ hail
May 12, 1993
1:48 PM EST
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: Three-quarter inch hail was reported at Mercersburg.
NWS Hail Report Location: Mercersburg, PA
0.75″ hail
May 12, 1993
1:48 PM EST
Hail report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Mercersburg, PA
Showing 11 of 11
Hail Damage Risk for Your Home +

Hail reports describe hail by diameter, often comparing stone size to familiar objects like peas, quarters, golf balls, and softballs. Use this guide as a starting point for possible hail damage to your roof, siding, gutters, vents, windows, and exterior. Actual hail damage depends on hail hardness, density, wind speed, impact angle, roof age, shingle condition, roof pitch, roofing material, installation quality, and prior storm damage.

Pea
0.25″
Low

Usually too small to cause hail damage to most sound asphalt roofs, siding, or gutters.

Mothball
0.50″
Sub-Severe Watch

Below the NWS severe-hail threshold, but not always harmless. Repeated small hail can scuff surfaces, wear aging shingles, and loosen protective granules over time.

Penny
0.75″
Minor / Watch

Below the NWS severe-hail threshold, but roof hail damage is still possible on older, brittle, poorly installed, or previously damaged shingles. May also mark screens, vents, gutters, and soft metal.

Nickel
0.88″
Minor / Watch

Still below the severe-hail threshold, but large enough to leave visible marks on soft metal and add wear to older or hail-weakened roof shingles.

Quarter
1.00″
Watch

The NWS severe-hail threshold. Quarter-size hail can bruise shingles, dent soft metal, and create roof hail damage worth checking.

Half Dollar
1.25″
Watch

More likely to dent gutters, vents, flashing, and siding. Hail damage risk rises quickly on older roofs or hail-weakened shingles.

Ping Pong / Walnut
1.50″
Likely

Hail damage becomes more likely, including bruised shingles, granule loss, dented siding, and damaged roof vents.

Golf Ball
1.75″
Likely

Often causes roof hail damage, cracked shingles, dented gutters, damaged flashing, and siding impacts. A roof inspection is recommended.

Hen Egg
2.00″
Serious

Can crack or puncture shingles, expose mat, dent siding, and cause widespread hail damage across the roof and exterior.

Tennis Ball
2.50″
Serious

Can cause heavy roof hail damage, punctured siding, broken skylights, damaged vents, and widespread exterior damage.

Baseball
2.75″
Major

Major hail damage is likely, including severe roof impacts, damaged siding, broken windows, and possible major roof repairs.

Tea Cup / Large Apple
3.00″
Major

Can cause heavy hail damage across the roof, siding, gutters, windows, and exterior. Significant repairs are often needed.

Softball
4.00″
Extreme

Destructive hail damage. Can severely damage roofing materials, siding, windows, gutters, vents, vehicles, and exterior surfaces.

Grapefruit
4.50″
Extreme

Catastrophic hail damage risk for roofs, windows, vehicles, siding, gutters, and exterior surfaces.

Source: NOAA / National Weather Service hail size references are used for hail-size comparisons and the 1.00″ severe-hail threshold. Damage descriptions are general homeowner guidance, not official NOAA/NWS damage ratings. Sub-severe hail under 1.00″ is below the severe threshold, but that does not mean “no roof damage.” Penny- to nickel-size hail can still contribute to granule loss, cosmetic surface marks, and added wear, especially on older, brittle, poorly installed, or previously damaged roofs.

Latest NWS Wind Reports in and near Mercersburg, PA

30 reports
Free hail report + wind check →
UNK mph
Aug 23, 2026
1:20 AM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Multiple trees and wires down in and around Mercersburg.
NWS Wind Report Location: 1 Sse Mercersburg, PA
UNK mph
Jul 4, 2026
9:28 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Trees down.
NWS Wind Report Location: Mercersburg, PA
UNK mph
Jun 14, 2026
10:00 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Trees/wires down on Bain Rd.
NWS Wind Report Location: 3 SE Claylick, PA
UNK mph
Jun 11, 2026
11:00 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Wires down on N Fayette St.
NWS Wind Report Location: Mercersburg, PA
UNK mph
May 20, 2026
5:35 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Multiple reports of wires down along Welsh Run Road and Mercersburg Road.
NWS Wind Report Location: 3 ESE Claylick, PA
UNK mph
Apr 20, 2025
1:50 AM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Damage to powerlines throughout Mercersburg.
NWS Wind Report Location: Mercersburg, PA
UNK mph
Apr 20, 2025
1:49 AM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Multiple trees down.
NWS Wind Report Location: Mercersburg, PA
UNK mph
Jul 12, 2022
6:45 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: TREES DOWN ON WIRES WEST OF MERCERSBURG.
NWS Wind Report Location: 2 W Mercersburg, PA
UNK mph
Sep 9, 2021
8:00 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: ROOF AND SILO DAMAGE NORTHEAST OF MERCERSBURG.
NWS Wind Report Location: 3 NE Mercersburg, PA
UNK mph
Jun 4, 2020
9:48 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: TREES AND WIRES DOWN ON LEMAR ROAD.
NWS Wind Report Location: 3 NE Mercersburg, PA
UNK mph
Jun 2, 2019
8:14 PM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: TREES ON WIRES ACROSS SHRIMPSTOWN ROAD.
NWS Wind Report Location: 3 E Sylvan, PA
UNK mph
Feb 13, 2017
2:55 AM UTC
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: TREES REPORTED DOWN ACROSS SOUTHWESTERN FRANKLIN COUNTY.
NWS Wind Report Location: Mercersburg, PA
58 mph
Jul 8, 2014
4:52 PM EST-5
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Thunderstorm winds estimated near 60 mph knocked down trees along SR 75 in Mercersburg.
NWS Wind Report Location: .84 NNW Mercersburg, PA
58 mph
Apr 24, 2013
4:30 PM EST-5
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Thunderstorm winds estimated near 60 mph knocked down trees and utility wires on Main Street in Mercersburg.
NWS Wind Report Location: .55 NNW Mercersburg, PA
58 mph
Jun 29, 2012
8:25 PM EST-5
Wind report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Wind Report Description: Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Mercersburg.
NWS Wind Report Location: .69 N Mercersburg, PA
Showing 15 of 30
Wind Damage Risk for Your Home +

Storm reports list thunderstorm wind gusts in mph. The NWS marks storms as severe at 58+ mph, but wind damage to your home depends on roof age, shingle condition, installation, exposure, nearby trees, and prior hail or wind damage.

Below Severe
Under 58 mph
Minor

Usually little damage to a sound roof, but loose shingles, flashing, or debris may shift.

Severe
58–74 mph
Watch

Can loosen shingles, lift flashing, break limbs, and damage gutters, siding, fences, or trim.

Damaging
75–90 mph
Serious

Can peel shingles, damage vents, tear siding, rip gutters, and expose weak roof areas.

Extreme
90+ mph
Major

Can cause major roof covering loss, tree damage, broken windows, and structural damage.

Source: NOAA / National Weather Service storm reports. Gusts may be measured or estimated; actual wind damage varies by roof condition, exposure, and prior hail or wind damage.

Latest NWS Tornado Reports in and near Mercersburg, PA

2 reports
F1 category
Sep 17, 2004
6:28 PM EST
Tornado report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Tornado Report Description: A survey team from the National Weather Service confirmed a tornado in Franklin County.The tornado occurred near the town of Saint Thomas and was rated an F1 on the Fujita scale. Top wind speeds were estimated at about 85 mph. The path was 2.5 miles long and began 3 miles south-southwest of Saint Thomas. The width of this tornado was 30 yards. The tornado touched down approximately at 728 pm EDT and lifted at 732 pm EDT. This tornado caused many trees to fall and damaged several structures.
NWS Tornado Report Location: 3 SW St Thomas, PA
F0 category
Jun 19, 1992
11:20 AM EST
Tornado report for Mercersburg, PA
Franklin County · 45,640 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, PA
Showing 2 of 2
Tornado Damage Risk for Your Home +

After a tornado, the National Weather Service assigns an EF rating from EF0 to EF5 based on surveyed damage. The rating estimates wind speed from what the tornado damaged, so actual damage can vary by construction quality, roof age, garage doors, windows, trees, debris, and how close the home was to the tornado path.

EF0
65–85 mph
Light

Can peel shingles, damage gutters or siding, break tree limbs, and toss loose outdoor items.

EF1
86–110 mph
Moderate

Can strip roof covering, damage exterior doors, break windows, snap trees, and cause heavier siding or gutter damage.

EF2
111–135 mph
Serious

Can tear off large sections of roofing, break or uproot trees, destroy weaker structures, and cause major exterior damage.

EF3–EF5
136+ mph
Severe

Can remove roofs and walls, destroy large portions of homes, toss vehicles, and cause severe to total destruction near the path.

Source: NOAA / National Weather Service. EF ratings are assigned after a post-storm damage survey and are based on observed damage, not a direct measurement at every home.

NWS Hail, Wind and Tornado Reports in and near Mercersburg, PA on the Interactive Map

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Tornado

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Browse ZIP Codes with NWS Storm Reports in Mercersburg

17236 42
Mercersburg, PA Hail, wind & tornado reports

NWS Storm Reports & Census Data

U.S. Census Data · City

Mercersburg, PA area census snapshot

People & households
Population1,940
Households799
Housing units879
Income
Median household income$69,583
$100k+ households41.1%
$150k+ households14.1%
Housing stock
Single-family detached520
Attached single-family117
Small multifamily173
Large multifamily60
Mobile homes9
Housing mix
Single-family share59.2%
Attached-home share13.3%
Multifamily share26.5%
Mobile-home share1.0%
Ownership & occupancy
Owner-occupied474
Renter-occupied325
Vacant units80
Home value & age
Median home value$210,400
Owner homes $300k+22.6%
Owner homes $500k+0.8%
Owner homes $750k+--
Median year built1948
Older-home share77.5%
Vehicle context
Households with cars772
Free hail maps

This snapshot is for local area context only and describes the selected state, county, city, or ZIP area — not a specific home or property. For ZIP-level estimated hail impact, use Free Hail Maps to generate a hail report with key impact details for that ZIP.

Frequently asked questions

for homeowners, buyers & sellers
How many hail, wind, and tornado reports does Mercersburg have on record?

Our records show 11 hail, 36 wind, and 2 tornado reports in and near Mercersburg, PA, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 23, 2026.

What is the largest hail ever reported in Mercersburg?

The largest hail size in these storm-report records in and near Mercersburg, PA is 1.75″. It was reported near .69 N Mercersburg, PA on May 26, 2011.

A storm report showed up near my home in Mercersburg — does that mean my roof is damaged?

Not necessarily. A storm report only means hail, wind, or a tornado was observed nearby; it does not confirm damage at any specific address, and conditions change from block to block. Check an address-level hail report first, and if it looks significant, find a local pro that serves Mercersburg and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in Mercersburg — why should I look at its storm history?

Recent hail or wind can leave a roof or exterior with damage that is easy to miss during a walkthrough, and a recent roof replacement is sometimes an insurance job after a storm. Reviewing the storm history for a Mercersburg address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in Mercersburg — how does this help me?

Knowing the storm history for your address lets you answer buyer questions with confidence, document repairs you have already made, and decide whether a pre-listing roof check is worthwhile. A clear hail history removes a common sticking point during negotiations.

How do I check hail history for a specific Mercersburg address?

Use the address search to pull a free address-level hail report for any property in Mercersburg — no phone number or email required. It shows recent hail activity for that address so you know whether a closer roof or exterior review makes sense.

Where does this storm report data come from, and what are its limits?

Storm reports on this page are public reports from storm events across Mercersburg, PA, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in Mercersburg, but they do not confirm damage at any specific property. Report locations, sizes, and times may be approximate and can vary from what an individual home experienced. For property-specific hail history, use an address-level hail report or contact a participating local professional for a remote hail inspection. Pros inclusion is not an endorsement, and contacting a professional does not confirm damage at any property.

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