Heads up! Small hail spotted in these regions: Colorado Springs, CO • Denver, CO • Champaign, IL • Mattoon, IL • Fayetteville, NC • Durham, NC ATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Sebring, FL • North Port, FL • Fort Myers, FL • Tampa, FL • Lakeland, FL • Hickory, NC • Charlotte, NC • Owensboro, KY • Knoxville, TN • Evansville, IN • Farmington, NM • Louisville, KY • Winston, NC • Greensboro, NC • Provo, UT • Logan, UT • Ogden, UT • Salt Lake City, UT Heads up! Small hail spotted in these regions: Colorado Springs, CO • Denver, CO • Champaign, IL • Mattoon, IL • Fayetteville, NC • Durham, NC ATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Sebring, FL • North Port, FL • Fort Myers, FL • Tampa, FL • Lakeland, FL • Hickory, NC • Charlotte, NC • Owensboro, KY • Knoxville, TN • Evansville, IN • Farmington, NM • Louisville, KY • Winston, NC • Greensboro, NC • Provo, UT • Logan, UT • Ogden, UT • Salt Lake City, UT

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

Hail, Wind & Tornado Reports in and near ZIP 21771

Public hail, wind, and tornado reports in and near ZIP 21771 from November 19, 1960 through September 4, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 21771 — search hail, wind and tornado public reports for any U.S. ZIP code

Hail Reports

Wind Reports

Tornado Reports

Max Hail Size

1.75″

Source NOAA SPC · NWS Local Storm Reports Coverage ZIP 21771 · 1960–present Updated Daily · last Sep 4, 2026

Latest NWS Hail Reports in and near ZIP 21771

11 reports

Free hail report for your home →

1.00″ hail

May 27, 2024
9:54 PM UTC

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: Quarter size hail was observed near Mount Airy.

NWS Hail Report Location: Mount Airy, MD

1.00″ hail

Aug 12, 2017
10:10 PM UTC

Hail report for ZIP 21771

Frederick County · 64,079 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: 2 N Friendship, MD

1.75″ hail

Jul 3, 2014
2:46 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: 1.06 NNE Mt Airy, MD

1.00″ hail

Jul 3, 2014
2:45 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: .71 SSW Mt Airy, MD

1.75″ hail

Jul 3, 2014
2:42 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: 3.61 SW Mt Airy, MD

1.25″ hail

Jul 3, 2014
2:42 PM EST-5

Hail report for ZIP 21771

Frederick County · 64,079 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: 1.67 ENE Kemptown, MD

1.75″ hail

Jul 3, 2014
2:42 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: .87 SW Mt Airy, MD

1.00″ hail

Aug 18, 2011
4:26 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: Hail up to quarters in size was reported near Mount Airy.

NWS Hail Report Location: 1.83 NE Mt Airy, MD

0.88″ hail

Jun 10, 2008
4:36 PM EST-5

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: A trained spotter reported nickel-sized hail in Mount Airy.

NWS Hail Report Location: .87 SW Mt Airy, MD

0.75″ hail

May 24, 2000
2:07 PM EST

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: Dime sized hail fell.

NWS Hail Report Location: Mt Airy, MD

0.88″ hail

Sep 18, 1991
3:25 PM CST

Hail report for ZIP 21771

Carroll County · 51,140 Homes in County

Hail Report Description: No National Weather Service description provided.

NWS Hail Report Location: Not provided, MD

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 ZIP 21771

82 reports

Free hail report + wind check →

UNK mph

Sep 4, 2026
2:35 AM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Large tree limbs snapped along Flag Marsh Rd

NWS Wind Report Location: 1 Ene Watersville, MD

UNK mph

Sep 2, 2026
5:13 PM UTC

Wind report for ZIP 21771

Frederick County · 64,079 Homes in County

Wind Report Description: Tree down along Bartholows Road. Time estimated via radar.

NWS Wind Report Location: 1 Ne Green Valley, MD

UNK mph

Aug 10, 2026
7:58 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: A tree fell onto a house along North Main Street

NWS Wind Report Location: 1 Ne Mount Airy, MD

UNK mph

Jun 15, 2026
12:24 AM UTC

Wind report for ZIP 21771

Frederick County · 64,079 Homes in County

Wind Report Description: Trees onto vehicles at 13000 St. Benedict Way

NWS Wind Report Location: 3 E Libertytown, MD

UNK mph

Jun 15, 2026
12:24 AM UTC

Wind report for ZIP 21771

Frederick County · 64,079 Homes in County

Wind Report Description: Cell tower damaged near 9095 Bessie Clemson Rd

NWS Wind Report Location: 2 E Libertytown, MD

UNK mph

Mar 16, 2026
3:53 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Tree reported down on the 5600 block of West Falls Road.

NWS Wind Report Location: 4 NNE Mount Airy, MD

58 mph

Nov 6, 2025
2:42 AM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: A wind gust of 50 knots (58 MPH) was measured by a trained spotter's personal weather station near Mount Airy.

NWS Wind Report Location: 1 N Watersville, MD

UNK mph

Jun 19, 2025
7:25 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Multiple large tree limbs snapped along Watersville Road.

NWS Wind Report Location: 2 N Watersville, MD

UNK mph

May 16, 2025
8:58 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Trees reported down on Ridge Ave. in Mt. Airy.

NWS Wind Report Location: Mount Airy, MD

UNK mph

Sep 7, 2023
6:35 PM UTC

Wind report for ZIP 21771

Howard County · 62,895 Homes in County

Wind Report Description: Trees and wires blew down on MD-27 Ridge Road at Penn Shop Road.

NWS Wind Report Location: 2 SSW Mount Airy, MD

UNK mph

Aug 7, 2023
8:57 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Tree down near Carroll Community College.

NWS Wind Report Location: 1 N Watersville, MD

UNK mph

Jul 28, 2023
10:48 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Trees and wires down over MD 27...

NWS Wind Report Location: 3 WSW Winfield, MD

UNK mph

Jul 28, 2023
10:40 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: There were a couple dozen reports of trees and wires blown down in the Mount Airy area.

NWS Wind Report Location: Mount Airy, MD

UNK mph

Jul 28, 2023
10:40 PM UTC

Wind report for ZIP 21771

Carroll County · 51,140 Homes in County

Wind Report Description: Numerous trees blew down along MD-27 Ridge Road near and north of West Falls Road. Trees blew down along MD-26 Liberty Road near Woodbine Road.

NWS Wind Report Location: 3 NE Mount Airy, MD

UNK mph

Jul 28, 2023
10:23 PM UTC

Wind report for ZIP 21771

Frederick County · 64,079 Homes in County

Wind Report Description: Trees and wires blew down along Old Annapolis Road.

NWS Wind Report Location: 4 NNE New Market, MD

Showing 15 of 82

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 21771

10 reports

UNK category

Nov 3, 2018
12:20 AM UTC

Tornado report for ZIP 21771

Carroll County · 51,140 Homes in County

Tornado Report Description: EF-1 TORNADO WITH A START LOCATION IN EXTREME NORTHWEST HOWARD COUNTY AT APPROXIMATELY 8:20 PM EDT. THE TORNADO THEN MOVED RAPIDLY TO THE NORTH ACROSS INTERSTATE 70... WITH THE MAJORITY OF THE DAMAGE IN MT. AIRY IN CARROLL COUNTY... BEFORE DISSIPATING AROUND 8:25 PM EDT NORTH OF GILLIS FALLS ROAD. PATH LENGTH OF 4.7 MILES OF NON-CONTINUOUS DAMAGE... WITH A MAXIMUM PATH WIDTH OF 400 YARDS. ESTIMATED MAXIMUM WIND SPEED 100 MPH.

NWS Tornado Report Location: 1 E Mount Airy, MD

UNK category

Jun 21, 2016
5:29 PM UTC

Tornado report for ZIP 21771

Howard County · 62,895 Homes in County

Tornado Report Description: PRELIMINARY RATING EF0...80 MPH MAX WIND...PATH WIDTH 500 YARDS...PATH LENGTH 12.75 MILES...ENDED AT 148 PM EDT

NWS Tornado Report Location: 1 SW Poplar Springs, MD

EF1 category

Jun 1, 2012
1:52 PM EST-5

Tornado report for ZIP 21771

Howard County · 62,895 Homes in County

Tornado Report Description: Intitial tornado damage occurred to trees along west Watersville Road just north of Old Frederick Road. The tornado tracked northeast across a large wooded area of West Watersville Road where a swath of large Hardwood trees were either snapped or uprooted. ||An area of intense damage consistent with EF-1 level winds was noted in the 500 Block of West Watersville Road where 30 to 40 large Hardwood trees up to two feet in diameter were uprooted or snapped twenty feet up.

NWS Tornado Report Location: 1.36 SW Watersville Jct, MD

EF0 category

Jun 1, 2012
1:48 PM EST-5

Tornado report for ZIP 21771

Carroll County · 51,140 Homes in County

Tornado Report Description: The tornado produced sporadic damage near Twin Arch road. There were about two dozen trees uprooted along with large limbs snapped.

NWS Tornado Report Location: 1.63 SSE Mt Airy, MD

EF1 category

Apr 16, 2011
6:48 PM EST-5

Tornado report for ZIP 21771

Carroll County · 51,140 Homes in County

Tornado Report Description: Tree damage was found near the intersection of MD-26 and MD-27. A power pole was also snapped near the intersection.

NWS Tornado Report Location: 1.08 NNW Cover, MD

EF1 category

Apr 16, 2011
6:47 PM EST-5

Tornado report for ZIP 21771

Frederick County · 64,079 Homes in County

Tornado Report Description: Substantial tree damage was noted near Talbot Run road. Pine trees were snapped near Buffalo Road and there was also a report of siding and trim torn from a home near Buffalo Road.

NWS Tornado Report Location: 3.51 SSE Unionville, MD

EF1 category

Apr 16, 2011
6:38 PM EST-5

Tornado report for ZIP 21771

Frederick County · 64,079 Homes in County

Tornado Report Description: Roofing panels were removed from a detached garage near Detrick Road and Old Annapolis Road. Six or more softwood trees were snapped and pieces of large limbs and plywood were impaled in adjacent roofs.

NWS Tornado Report Location: .67 SE New London, MD

EF0 category

Aug 12, 2010
4:03 PM EST-5

Tornado report for ZIP 21771

Frederick County · 64,079 Homes in County

Tornado Report Description: Numerous trees were uprooted and large limbs were snapped. The damage to trees and debris showed a convergent and weakly rotational pattern which suggests there was a weak tornado near and just north of Westvale Court.

NWS Tornado Report Location: 2.75 S Unionville, MD

F1 category

Jun 4, 1996
7:05 PM EST

Tornado report for ZIP 21771

Frederick County · 64,079 Homes in County

Tornado Report Description: No National Weather Service description provided.

NWS Tornado Report Location: W Mt Airy, MD

F1 category

Nov 19, 1960
1:30 PM CST

Tornado report for ZIP 21771

Frederick County · 64,079 Homes in County

Tornado Report Description: No National Weather Service description provided.

NWS Tornado Report Location: Not provided, MD

Showing 10 of 10

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 21771 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 21771 area census snapshot

People & households

Population32,827

Households10,879

Housing units11,401

Income

Median household income$154,844

$100k+ households49.2%

$150k+ households29.9%

Housing stock

Single-family detached9,938

Attached single-family1,092

Small multifamily81

Large multifamily38

Mobile homes241

Housing mix

Single-family share87.2%

Attached-home share9.6%

Multifamily share1.0%

Mobile-home share2.1%

Ownership & occupancy

Owner-occupied10,107

Renter-occupied772

Vacant units522

Home value & age

Median home value$532,200

Owner homes $300k+92.3%

Owner homes $500k+55%

Owner homes $750k+16.2%

Median year built1987

Older-home share34.9%

Vehicle context

Households with cars10,676

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 21771 have on record?

Our records show 11 hail, 82 wind, and 10 tornado reports in and near ZIP 21771, 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 21771?

The largest hail size in these storm-report records in and near ZIP 21771 is 1.75″. It was reported near Mt Airy, MD on July 3, 2014.

A storm report showed up near my home in ZIP 21771 — 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 21771 and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in ZIP 21771 — 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 21771 address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in ZIP 21771 — 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 21771 address?

Use the address search to pull a free address-level hail report for any property in ZIP 21771 — 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 21771, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in ZIP 21771, 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 21771

Latest NWS Hail Reports in and near ZIP 21771

Latest NWS Wind Reports in and near ZIP 21771

Latest NWS Tornado Reports in and near ZIP 21771

NWS Hail, Wind and Tornado Reports in and near ZIP 21771 on the Interactive Map

Get a free hail report for your address

NWS Storm Reports & Census Data

ZIP 21771 area census snapshot

Frequently asked questions

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