NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Clarksburg, MD
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
25 tropical systems have passed within 75 miles of Clarksburg, Maryland since 1851, 3 of them at hurricane strength; the most recent was Isaias in 2020. Since 1950, 108 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 3
- Tropical storms
- 22
- Tornadoes
- 108
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
3 deaths in all
What the records show for Clarksburg
The strongest storm to pass near Clarksburg was an unnamed storm in 1878, a Category 1 hurricane with 91 mph winds when its centre passed 13 miles away. The closest pass by a hurricane was Hazel in 1954, whose centre came within 8 miles. The record near Clarksburg begins with an unnamed storm in 1876; the most recent system was Isaias in 2020, a tropical storm 65 miles away. The busiest decade was the 1890s, with 5 systems, one of them at hurricane strength. Of the 25 systems, 3 have come since 2000. Clarksburg has more hurricanes within 75 miles than 14% of the 239 Maryland cities on this site. The highest rating among the 108 tornadoes within 25 miles is F3, reached 3 times; the most recent, on September 24, 2001, came within 24 miles. Of the 108, 2 had paths within 5 miles of the city centre, and 63 have come since 2000. June has had the most tornadoes, 26. The most recent tornado was on June 5, 2024. Clarksburg has more tornadoes within 25 miles than 74% of the 239 Maryland cities. Hail has been reported within 10 miles 74 times since 1965, with stones up to 2.25 inches. Clarksburg has more hail reports within 10 miles than 64% of the 239 Maryland cities.
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Tropical storms and hurricanes near Clarksburg
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2020 | IsaiasAug 4 | 65 mi | Tropical storm (67 mph) | Category 1 |
| 2012 | SandyOct 30 | 53 mi | Tropical storm (60 mph) | Category 3 |
| 2006 | ErnestoSep 2 | 32 mi | Tropical storm (44 mph) | Category 1 |
| 1979 | DavidSep 6 | 49 mi | Tropical storm (46 mph) | Category 5 |
| 1955 | DianeAug 18 | 4 mi | Tropical storm (43 mph) | Category 2 |
| 1955 | ConnieAug 13 | 29 mi | Tropical storm (56 mph) | Category 4 |
| 1954 | HazelOct 15 | 8 mi | Category 1 (83 mph) | Category 4 |
| 1952 | AbleSep 1 | 3 mi | Tropical storm (56 mph) | Category 2 |
| 1949 | Unnamed 1949 stormAug 29 | 20 mi | Tropical storm (58 mph) | Category 4 |
| 1945 | Unnamed 1945 stormSep 18 | 53 mi | Tropical storm (39 mph) | Category 4 |
| 1943 | Unnamed 1943 stormOct 1 | 28 mi | Tropical storm (43 mph) | Tropical storm |
| 1934 | Unnamed 1934 stormJun 19 | 6 mi | Tropical storm (46 mph) | Category 2 |
| 1933 | Unnamed 1933 stormAug 24 | 8 mi | Tropical storm (60 mph) | Category 4 |
| 1929 | Unnamed 1929 stormOct 2 | 36 mi | Tropical storm (58 mph) | Category 4 |
| 1928 | Unnamed 1928 stormSep 20 | 30 mi | Tropical storm (49 mph) | Category 5 |
| 1915 | Unnamed 1915 stormAug 4 | 13 mi | Tropical storm (48 mph) | Category 1 |
| 1899 | Unnamed 1899 stormNov 1 | 45 mi | Tropical storm (58 mph) | Category 2 |
| 1896 | Unnamed 1896 stormSep 30 | 66 mi | Tropical storm (69 mph) | Category 3 |
| 1893 | Unnamed 1893 stormOct 23 | 10 mi | Tropical storm (43 mph) | Tropical storm |
| 1893 | Unnamed 1893 stormOct 14 | 39 mi | Category 1 (74 mph) | Category 3 |
| 1893 | Unnamed 1893 stormAug 29 | 6 mi | Tropical storm (63 mph) | Category 3 |
| 1888 | Unnamed 1888 stormAug 21 | 73 mi | Tropical storm (47 mph) | Category 3 |
| 1885 | Unnamed 1885 stormOct 13 | 32 mi | Tropical storm (46 mph) | Tropical storm |
| 1878 | Unnamed 1878 stormOct 23 | 13 mi | Category 1 (91 mph) | Category 2 |
| 1876 | Unnamed 1876 stormSep 18 | 17 mi | Tropical storm (64 mph) | Category 3 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Clarksburg: a hurricane's worst winds sit within a few dozen miles of its centre, and inland cities are usually past that.
Tornadoes within 25 miles of Clarksburg
By decade
- 2020s16
- 2010s25
- 2000s22(1 EF3+)
- 1990s24(1 EF3+)
- 1980s1
- 1970s10(1 EF3+)
- 1960s6
- 1950s4
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Sep 24, 2001 | F3 | 24 mi | 17.5 mi | 2 / 55 |
| Sep 5, 1979 | F3 | 18 mi | 17.9 mi | 1 / 6 |
| Jul 19, 1996 | F3 | 23 mi | 2.2 mi | 0 / 3 |
| Jun 5, 2024 | EF2 | 21 mi | 4.42 mi | 0 / 0 |
| Jun 5, 2024 | EF2 | 21 mi | 4.42 mi | 0 / 0 |
| Nov 2, 2018 | EF2 | 9 mi | 5.45 mi | 0 / 0 |
| Sep 17, 2004 | F2 | 17 mi | 3 mi | 0 / 0 |
| Sep 17, 2004 | F2 | 9 mi | 15 mi | 0 / 1 |
| Jul 19, 1996 | F2 | 23 mi | 2 mi | 0 / 0 |
| Sep 5, 1979 | F2 | 14 mi | 0.5 mi | 0 / 0 |
| Sep 5, 1979 | F2 | 17 mi | 0.5 mi | 0 / 2 |
| Jul 31, 1978 | F2 | 12 mi | 0.8 mi | 0 / 0 |
The strongest 12 of 108, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Clarksburg
The Storm Prediction Center has 74 hail reports within 10 miles of Clarksburg since 1965, made on 54 separate days. Of these, 43 were 1 inch across or larger, and 3 reached 2 inches. The largest, 2.25 inches, fell on June 2, 1998. The most recent report is from May 3, 2025. June has the most reports, 23.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Clarksburg
The nearest NOAA station with 1991–2020 climate normals is Damascus 3 SSW, MD, 3 miles east of Clarksburg at 700 feet. July is the warmest, with an average high of 84°F and low of 66°F; January is the coolest, at 39°F and 25°F. September is the wettest at 4.8 inches of precipitation on average and February the driest at 3.0 inches; the year adds up to 48.0 inches over 80 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (25.7 of 48.0 inches); the other six months are drier. Highs reach 90°F on about 13 days a year, almost all from June to August. Lows fall below freezing on about 98 nights a year. Snowfall averages 31.4 inches a year, most of it in February. That 48.0 inches is more than at 33 of the 41 Maryland stations used on this site (80%). Montgomery Village, 8 miles southeast, has its own station (Rockville 1 NE, MD): 41.5 inches a year, 6.5 less than here, and a July average high of 87°F against 84°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 39 | 25 | 3.4 | 6 | 9.4 |
| Feb | 43 | 26 | 3.0 | 6 | 11.1 |
| Mar | 52 | 33 | 4.0 | 7 | 4.8 |
| Apr | 64 | 43 | 3.6 | 7 | 0.2 |
| May | 73 | 53 | 4.4 | 8 | 0.0 |
| Jun | 80 | 62 | 4.7 | 8 | 0.0 |
| Jul | 84 | 66 | 4.5 | 7 | 0.0 |
| Aug | 83 | 65 | 4.2 | 7 | 0.0 |
| Sep | 76 | 58 | 4.8 | 7 | 0.0 |
| Oct | 65 | 47 | 4.0 | 6 | 0.0 |
| Nov | 53 | 36 | 3.5 | 6 | 0.8 |
| Dec | 44 | 30 | 3.9 | 7 | 5.1 |
| Year | 63 | 45 | 48.0 | 80 | 31.4 |
Averages for 1991–2020 at Damascus 3 SSW, MD (700 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Clarksburg
Since 1996, the National Weather Service has logged 492 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Clarksburg: 368 thunderstorm wind reports, 63 floods, 54 flash floods and 7 lightning strikes. They killed 1 person and injured 0, and the NWS estimated $5.1 million in property and crop damage. The strongest thunderstorm gust on record here was 90 mph, on August 12, 2010. July has had the most flash floods, 20 of 54. Of the 239 Maryland cities on this site with a flash flood on record, 148 have had fewer than Clarksburg.
August 11, 2021: lightning strike 7 miles from the centre of Clarksburg — 1 killed, $300,000 damage.
August 10, 2021: lightning strike 8 miles from the centre of Clarksburg — $2.5 million damage.
March 8, 2008: thunderstorm wind 9 miles from the centre of Clarksburg — $400,000 damage.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Montgomery County, which includes Clarksburg, has been named in 21 federal disaster or emergency declarations since 1971, 14 of them major disasters (by incident: 5 hurricanes, 5 severe storms, 5 snowstorms, 3 floods). The latest major disaster declaration was Covid-19 Pandemic, on March 26, 2020. FEMA's National Risk Index gives Montgomery County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for hail, inland flooding, strong wind, lightning and heat waves; Relatively Moderate for hurricanes and tornadoes; Very Low for coastal flooding. It models the county's expected loss from all 18 hazards it covers at $126.4 million a year, the 3rd highest of 24 Maryland counties; of the hazards above, the largest share, $71.0 million (56%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Clarksburg
- Damascus, MD4 mi
- Boyds, MD5 mi
- Ijamsville, MD6 mi
- Germantown, MD6 mi
- Monrovia, MD7 mi
- Dickerson, MD7 mi
- Montgomery Village, MD8 mi
- Gaithersburg, MD9 mi
- Adamstown, MD10 mi
- New Market, MD10 mi
- Mount Airy, MD11 mi
- Poolesville, MD11 mi
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