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

Hail, Wind & Tornado Reports in and near ZIP 20878

Public hail, wind, and tornado reports in and near ZIP 20878 from July 18, 1965 through September 4, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 20878 — search hail, wind and tornado public reports for any U.S. ZIP code

Hail Reports

Wind Reports

Tornado Reports

Max Hail Size

1.00″

Source NOAA SPC · NWS Local Storm Reports Coverage ZIP 20878 · 1965–present Updated Daily · last Sep 4, 2026

Latest NWS Hail Reports in and near ZIP 20878

3 reports

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1.00″ hail

Apr 6, 2017
6:03 PM UTC

Hail report for ZIP 20878

Montgomery County · 189,730 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: Gaithersburg, MD

0.75″ hail

Aug 14, 2008
1:54 PM EST-5

Hail report for ZIP 20878

Montgomery County · 189,730 Homes in County

Hail Report Description: Penny size hail was reported near Gaithersburg.

NWS Hail Report Location: .87 SE Clopper, MD

0.75″ hail

Jul 18, 1965
5:00 PM CST

Hail report for ZIP 20878

Montgomery County · 189,730 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: Not provided, MD

Showing 3 of 3

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 ZIP 20878

51 reports

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UNK mph

Sep 4, 2026
3:50 AM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Tree down along 9300 block of Mercy Hollow Lane.

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Aug 10, 2026
8:12 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: 10 large cedar trees snapped down

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Aug 10, 2026
8:10 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Several reports of trees down

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jul 28, 2026
9:33 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Trees and wires down near the intersection of Woodfield Road and East Village Avenue. Tree and wires down in the 7200 block of Brink Road. Tree into a house on Turtle Dove Court. Trees down in the 83

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jul 28, 2026
9:32 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Trees and wires were down around Gaithersburg.

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jun 19, 2025
8:26 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Numerous trees and wires down across Silver Spring

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jun 19, 2025
8:14 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Trees and wires down

NWS Wind Report Location: 1 ESE North Potomac, MD

UNK mph

May 16, 2025
9:22 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Trees blew down into the roadway on eastbound MD-117 Clopper Road at Game Preserve Road blocking the right side of the roadway.

NWS Wind Report Location: 2 WNW Gaithersburg, MD

UNK mph

Jul 14, 2023
8:50 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: Multiple trees and branches down on and near Germantown Road.

NWS Wind Report Location: 3 E Dawsonville, MD

UNK mph

Jun 9, 2022
12:08 AM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: TREE DOWN NEAR WARFIELD AND DORSEY ROAD.

NWS Wind Report Location: Gaithersburg, MD

62 mph

Aug 27, 2021
7:16 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: No National Weather Service description provided.

NWS Wind Report Location: 1 NW Gaithersburg, MD

UNK mph

Aug 10, 2021
8:52 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: WIRES DOWN NEAR THE INTERSECTION OF JONES LANE AND QUAIL RUN DRIVE. A TREE BLEW DOWN ONTO WIRES IN THE 12900 BLOCK OF RIFFLE FORD COURT.

NWS Wind Report Location: 1 NW North Potomac, MD

UNK mph

Jul 26, 2021
10:49 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: TREE DOWN ON HOUSE ON FULHAM STREET OFF OF KERSEY ROAD.

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jul 17, 2021
8:13 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: TREE AND WIRES DOWN ON GLEN MILL ROAD NEAR JOINERS LANE.

NWS Wind Report Location: Gaithersburg, MD

UNK mph

Jun 21, 2021
9:25 PM UTC

Wind report for ZIP 20878

Montgomery County · 189,730 Homes in County

Wind Report Description: TREE DOWN ON MD-28 AT COPEN MEADOW DRIVE.

NWS Wind Report Location: 2 NNW North Potomac, MD

Showing 15 of 51

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 ZIP 20878

0 reports

No tornado reports were found for this selection.

Showing 0 of 0

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 ZIP 20878 on the Interactive Map

Report type

Hail

Wind

Tornado

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NWS Storm Reports & Census Data

U.S. Census Data · ZIP Code

ZIP 20878 area census snapshot

People & households

Population65,236

Households24,337

Housing units25,297

Income

Median household income$142,062

$100k+ households45.2%

$150k+ households22.6%

Housing stock

Single-family detached10,720

Attached single-family6,591

Small multifamily1,863

Large multifamily6,089

Mobile homes34

Housing mix

Single-family share42.4%

Attached-home share26.1%

Multifamily share31.4%

Mobile-home share0.1%

Ownership & occupancy

Owner-occupied16,875

Renter-occupied7,462

Vacant units960

Home value & age

Median home value$675,200

Owner homes $300k+93.5%

Owner homes $500k+69.9%

Owner homes $750k+41.5%

Median year built1987

Older-home share27.2%

Vehicle context

Households with cars23,243

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 ZIP 20878 have on record?

Our records show 3 hail, 51 wind, and 0 tornado reports in and near ZIP 20878, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on September 4, 2026.

What is the largest hail ever reported in ZIP 20878?

The largest hail size in these storm-report records in and near ZIP 20878 is 1.00″. It was reported near Gaithersburg, MD on April 6, 2017.

A storm report showed up near my home in ZIP 20878 — 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 ZIP 20878 and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in ZIP 20878 — 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 ZIP 20878 address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in ZIP 20878 — 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 ZIP 20878 address?

Use the address search to pull a free address-level hail report for any property in ZIP 20878 — 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 in and around ZIP 20878, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in ZIP 20878, 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.

Hail, Wind & Tornado Reports in and near ZIP 20878

Latest NWS Hail Reports in and near ZIP 20878

Latest NWS Wind Reports in and near ZIP 20878

Latest NWS Tornado Reports in and near ZIP 20878

NWS Hail, Wind and Tornado Reports in and near ZIP 20878 on the Interactive Map

Get a free hail report for your address

NWS Storm Reports & Census Data

ZIP 20878 area census snapshot

Frequently asked questions

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