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

Hail, Wind & Tornado Reports in Boulder County, CO

Public hail, wind, and tornado reports across Boulder County, CO from May 12, 1955 through July 28, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 80501 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
327
Wind Reports
77
Tornado Reports
11
Max Hail Size
3.00″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Boulder County, CO · 1955–present Updated  Daily · last Jul 28, 2026

Latest NWS Hail Reports in Boulder County

30 reports
Free hail report for your home →
1.00″ hail
Jul 28, 2026
8:04 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Delayed report via CoCoRaHS. Hail lasted approximately 12 minutes and dented some cars.
NWS Hail Report Location: Lyons, CO
1.00″ hail
Aug 11, 2025
1:13 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 3 S Niwot, CO
1.00″ hail
Jul 12, 2025
12:27 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 NNW Louisville, CO
1.00″ hail
Jun 17, 2025
7:57 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 1 W Erie, CO
1.00″ hail
Jun 17, 2025
7:48 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2 WNW Lafayette, CO
1.00″ hail
May 18, 2025
9:16 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Picture of 1 inch hail on X.
NWS Hail Report Location: 3 NNW Marshall, CO
1.00″ hail
May 31, 2024
3:15 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 2 NW Erie, CO
1.00″ hail
May 31, 2024
3:00 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Size estimated... as hail was still falling.
NWS Hail Report Location: 1 WNW Niwot, CO
1.00″ hail
May 31, 2024
2:58 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.). Time adjusted by radar.
NWS Hail Report Location: 1 W Niwot, CO
1.00″ hail
Jun 22, 2023
12:11 AM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 SSE Boulder, CO
1.00″ hail
Jun 12, 2023
6:53 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: 1-2 inches of hail covering the roads.
NWS Hail Report Location: 2 WSW Boulder, CO
1.00″ hail
Jun 12, 2023
6:44 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 2 SW Boulder, CO
1.00″ hail
May 28, 2023
9:18 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 SSW Niwot, CO
1.00″ hail
May 28, 2023
9:18 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 S Niwot, CO
1.25″ hail
May 26, 2023
8:35 PM UTC
Hail report for Boulder County, CO
Boulder County · 82,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 NE Longmont, CO
Showing 15 of 30
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 Boulder County

30 reports
Free hail report + wind check →
55 mph
Jul 28, 2026
7:58 PM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: Personal weather station.
NWS Wind Report Location: 3 Sse Pinewood Springs, CO
UNK mph
Jul 21, 2024
2:19 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: Report from mPING: 1-inch tree limbs broken; Shingles blown off.
NWS Wind Report Location: 1 N Longmont, CO
UNK mph
Jul 21, 2024
1:58 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: Report from mPING: 1-inch tree limbs broken; Shingles blown off.
NWS Wind Report Location: 1 NW Longmont, CO
61 mph
Jul 20, 2024
11:45 PM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: Mesonet station DW1011 Longmont.
NWS Wind Report Location: 4 SW Hygiene, CO
61 mph
Aug 1, 2023
12:57 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: Mesonet station CO167 036e04190rws1rhs - 1.7 Mi W Of M.
NWS Wind Report Location: 2 ENE Marshall, CO
68 mph
Jul 26, 2021
12:48 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: A PERSONAL WEATHER STATION RECORDED A SUSTAINED WIND OF 59.7 MPH WITH A GUST OF 68.4 MPH BETWEEN 6:47 AND 6:49 PM.
NWS Wind Report Location: 6 ENE Jamestown, CO
UNK mph
Jun 6, 2020
9:40 PM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: NUMEROUS 1 INCH DIAMETER TREE LIMBS BROKEN.
NWS Wind Report Location: 2 NW Louisville, CO
63 mph
Jun 6, 2020
9:25 PM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: CORRECTS PREVIOUS NON-TSTM WND GST REPORT FROM 1 NE CRISMAN. MESONET STATION EW4338 BOULDER.
NWS Wind Report Location: 1 NE Crisman, CO
58 mph
Jun 29, 2019
2:55 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: AWOS STATION KLMO LONGMONT VANCE BRAND.
NWS Wind Report Location: 3 WSW Longmont, CO
62 mph
Jun 17, 2019
8:54 PM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: REPORTED AT KBDU ASOS.
NWS Wind Report Location: 1 NE Boulder, CO
67 mph
Aug 4, 2018
2:23 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 2 SSE Gold Hill, CO
64 mph
Aug 4, 2018
2:00 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: NCAR MESA LAB.
NWS Wind Report Location: 3 SSW Boulder, CO
75 mph
Jan 31, 2018
4:15 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: SMALL TREE LIMBS OF 2 INCH IN DIAMTER DOWN.
NWS Wind Report Location: 4 ENE Nederland, CO
UNK mph
Aug 5, 2017
1:45 AM UTC
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: TREE BRANCH KNOCKED ONTO POWER LINES ON HIGHWAY 52 NEAR COUNTY LINE ROAD. POWER KNOCKED OUT IN VICINITY... INCLUDING INTERSECTION OF HIGHWAYS 52 AND 287.
NWS Wind Report Location: 6 SSE Longmont, CO
73 mph
Mar 30, 2014
8:57 PM MST-7
Wind report for Boulder County, CO
Boulder County · 82,726 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 2.14 NNW Longmont, CO
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 Boulder County

11 reports
UNK category
Aug 13, 2024
8:56 PM UTC
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: Corrects previous tornado report from 2 NW Broomfield. Brief Landspout Tornado. Lasted less than a minute.
NWS Tornado Report Location: 4 NW Broomfield, CO
EF3 category
Jun 4, 2015
5:30 PM MST-7
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: The tornado first touched about 3 miles south of Berthoud, and then tracked to the west/northwest and lifted about 6 miles southwest of Berthoud. The majority of the damage was EF1, with some areas of EF2, and a few small areas of EF3. At least 25 homes between Longmont and Berthoud were damaged; three of them destroyed. No injuries were reported as the winds tore apart homes and rolled vehicles.
NWS Tornado Report Location: N Highland, CO
F1 category
Jun 6, 1997
1:15 PM MST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: A tornado touched down near Baseline Reservoir. The tornado struck a home, tearing off part of the roof. A storage building nearby was nearly levelled and 5 trees were uprooted. The twister then moved onto Baseline Reservoir forming a huge waterspout. Several recreational vehicles and a boat dock were also damaged.
NWS Tornado Report Location: 3 SE Boulder, CO
F0 category
Jul 12, 1996
7:40 PM MST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Broomfield, CO
F1 category
Jun 16, 1996
4:15 PM MST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: NW Pinecliffe, CO
F0 category
Jun 1, 1990
5:03 PM MST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
F2 category
Jun 5, 1988
3:25 PM MST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
F2 category
Oct 15, 1980
6:22 PM CST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
F1 category
Apr 30, 1980
11:00 AM CST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
F1 category
May 17, 1978
3:45 PM CST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
F1 category
May 12, 1955
5:30 PM CST
Tornado report for Boulder County, CO
Boulder County · 82,726 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, CO
Showing 11 of 11
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 Boulder County on the Interactive Map

Report type
Hail
Wind
Tornado

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Browse Cities with NWS Storm Reports in Boulder County

Boulder, CO 113
Hail, wind & tornado reports
Longmont, CO 110
Hail, wind & tornado reports
Lafayette, CO 39
Hail, wind & tornado reports
Louisville, CO 31
Hail, wind & tornado reports
Niwot, CO 21
Hail, wind & tornado reports
Superior, CO 16
Hail, wind & tornado reports
Lyons, CO 15
Hail, wind & tornado reports
Leyner, CO 10
Hail, wind & tornado reports
Allenspark, CO 6
Hail, wind & tornado reports
Nederland, CO 4
Hail, wind & tornado reports
Paragon Estates, CO 4
Hail, wind & tornado reports
Altona, CO 3
Hail, wind & tornado reports
Gunbarrel, CO 3
Hail, wind & tornado reports
Ward, CO 3
Hail, wind & tornado reports
Bonanza Mountain Estates, CO 2
Hail, wind & tornado reports
Gold Hill, CO 2
Hail, wind & tornado reports

NWS Storm Reports & Census Data

U.S. Census Data · County

Boulder County, CO area census snapshot

People & households
Population328,317
Households135,230
Housing units142,809
Income
Median household income$102,772
$100k+ households39.9%
$150k+ households19.6%
Housing stock
Single-family detached82,726
Attached single-family12,806
Small multifamily16,830
Large multifamily27,055
Mobile homes3,242
Housing mix
Single-family share57.9%
Attached-home share9.0%
Multifamily share30.7%
Mobile-home share2.3%
Ownership & occupancy
Owner-occupied84,461
Renter-occupied50,769
Vacant units7,579
Home value & age
Median home value$713,900
Owner homes $300k+92.4%
Owner homes $500k+75.5%
Owner homes $750k+45.7%
Median year built1986
Older-home share41.5%
Vehicle context
Households with cars128,385
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.

Top ZIP Codes with NWS Storm Reports in Boulder County

80501 71
Longmont, CO Hail, wind & tornado reports
80504 67
Firestone, CO Hail, wind & tornado reports
80302 62
Lazy Acres, CO Hail, wind & tornado reports
80516 58
Erie, CO Hail, wind & tornado reports
80020 57
Broomfield, CO Hail, wind & tornado reports
80403 52
Coal Creek, CO Hail, wind & tornado reports
80513 39
Berthoud, CO Hail, wind & tornado reports
80026 37
Lafayette, CO Hail, wind & tornado reports
80301 34
Boulder, CO Hail, wind & tornado reports
80503 31
Longmont, CO Hail, wind & tornado reports
80027 29
Louisville, CO Hail, wind & tornado reports
80540 26
Allenspark, CO Hail, wind & tornado reports
80303 11
Boulder, CO Hail, wind & tornado reports
80305 11
Boulder, CO Hail, wind & tornado reports
80304 9
Boulder, CO Hail, wind & tornado reports
80466 7
Eldora, CO Hail, wind & tornado reports
80510 4
Allenspark, CO Hail, wind & tornado reports
80455 3
Glendale, CO Hail, wind & tornado reports

Get a Remote Hail Inspection

Not sure if hail may have affected your home in Boulder County? Ask a local pro for a Remote Hail Inspection. They can review hail activity for your property and help you decide whether an in-person roof or exterior inspection makes sense.

Frequently asked questions

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

Our records show 327 hail, 77 wind, and 11 tornado reports in Boulder County, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on July 28, 2026.

What is the largest hail ever reported in Boulder County?

The largest hail size in these storm-report records in Boulder County is 3.00″. It was reported near Superior, CO on June 19, 2018.

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

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

I am selling a home in Boulder County — 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 Boulder County address?

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