Calvert County, Maryland severe weather history spans 447 recorded events between 1960 and 2026. The dominant hazard is thunderstorm wind, accounting for 67.6% of all recorded events. It ranks #1,072 nationally and #14 in Maryland.
447
Recorded events
3
Direct deaths
5
Direct injuries
$15.2M
Property damage
The record
What the Calvert County, Maryland severe weather history record shows
Across the archive, Calvert County, Maryland severe weather history averages 6.8 recorded events a year. The busiest stretch on record is the 2010s, with 175 events logged in that decade alone. Roughly 20 events fall before 1990 and 427 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The deadliest hazard in the Calvert County, Maryland record is tornado, responsible for 2 direct deaths. The costliest is tornado, with $11.6M in reported property damage. In total, 9 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Calvert County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Thunderstorm Wind | 302 | 0 | $1.9M | 90 | 1960–2026 |
| Hail | 49 | 0 | $106K | 3 | 1962–2022 |
| Flood | 27 | 0 | $5K | 0 | 2008–2023 |
| Flash Flood | 23 | 0 | $535K | 0 | 1996–2021 |
| Tornado | 18 | 2 | $11.6M | F2 | 1978–2020 |
| Heavy Rain | 14 | 0 | $0 | 0 | 2000–2006 |
| Lightning | 10 | 1 | $255K | 0 | 1996–2022 |
| Storm Surge/Tide | 3 | 0 | $750K | 0 | 1996–1999 |
| Funnel Cloud | 1 | 0 | $0 | 0 | 2004–2004 |
Decade by decade
Calvert County, Maryland severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
18 mapped tornado paths intersect this county: 13 touched down inside it and 5 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 2002-04-28 | EF4 | 3 | 122 | 38.0 mi | Crossed in |
| 1983-10-13 | EF2 | 0 | 0 | 4.0 mi | Crossed in |
| 1978-06-27 | EF2 | 0 | 0 | 6.9 mi | Touched down here |
| 2020-08-04 | EF1 | 0 | 0 | 3.0 mi | Touched down here |
| 2002-04-28 | EF1 | 0 | 0 | 5.0 mi | Touched down here |
| 2000-05-13 | EF1 | 0 | 0 | 12.0 mi | Crossed in |
| 2000-04-21 | EF1 | 0 | 0 | 1.5 mi | Touched down here |
| 1996-06-24 | EF1 | 0 | 0 | 5.0 mi | Crossed in |
| 1994-07-27 | EF1 | 0 | 0 | 3.0 mi | Touched down here |
| 2020-08-04 | EF0 | 0 | 0 | 0.8 mi | Touched down here |
Significant events
Deadliest events on record in Calvert County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Apr 28, 2002 | Tornado | BOWENS | 2 | 0 | $10.0M |
| Jul 4, 2000 | Lightning | SOLOMONS | 1 | 0 | $0 |
| Aug 1, 2011 | Thunderstorm Wind | CHESAPEAKE BEACH | 0 | 2 | $100K |
| Jun 3, 2000 | Lightning | DUNKIRK | 0 | 1 | $0 |
| May 14, 2000 | Tornado | CHANEY | 0 | 1 | $20K |
| Sep 5, 1979 | Tornado | 0 | 1 | $250K |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
A microburst caused more than $100,000 in damage to a private airfield in northwest Calvert Co. One hangar was destroyed, and the roof of another hangar was thrown 1,000 feet, destroying an antique single-engine piper cub. Planes being rebuilt in the destroyed hangar sustained minor damage. Trees and power lines were also knocked down by the displaced roof, causing over 4,000 Southern Maryland Electric Co-operative customers to be without power.
An NWS storm survey concluded that a high end EF-0 tornado impacted portions of Chesapeake Beach in Calvert County. Maximum winds were estimated to be 85 mph. Approximately a dozen hardwood trees in the Richfield Station area were uprooted. One single family home had a 3 foot diameter poplar tree fall through the roof. Portions of roofs and siding were torn away from 10 to 20 single family homes. Tree and roof damage also occurred in the Bayview Hills area of Chesapeake Beach. In this location, siding on opposite sides of a single family home was observed. A free standing light pole in Lynwood T. Kellam Memorial Recreational Park was bent. The entire roof decking of a restaurant on bayside Road was blown away. Damages were estimated at over $400,000.
Dozens of trees snapped and uprooted scattered across the area along MD-231 Hallowing Point Road from the Patuxent River Bridge to MD-508 Adelina Road, including in Hallowing Point Park. The county reported trees were uniformly downed toward the southeast.
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
94,313
Population (ACS)
$460K
Median home value
24
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Jan 24, 2026 | Winter Storm | SEVERE WINTER STORM | EM |
| Feb 4, 2021 | Hurricane | TROPICAL STORM ISAIAS | DR |
| Mar 26, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Mar 4, 2016 | Snowstorm | SEVERE WINTER STORM AND SNOWSTORM | DR |
| Nov 20, 2012 | Hurricane | HURRICANE SANDY | DR |
Quick answers
Frequently asked
How many severe weather events have been recorded in Calvert County, Maryland?
447 events are on record between 1960 and 2026, causing 3 direct deaths and $15.2M in property damage.
What is the most common severe weather hazard in Calvert County?
Thunderstorm Wind, with 302 recorded events — 67.6% of everything in the archive for this county.
How many tornadoes have crossed Calvert County?
18 mapped tornado paths intersect the county boundary; 13 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Calvert County?
24 federal disaster declarations from FEMA include Calvert County, each tied to a specific incident period.
How risky is Calvert County compared with the rest of the country?
FEMA's National Risk Index rates Calvert County as very low risk, placing it in the 29 percentile of its state for expected annual loss.
Where does the Calvert County, Maryland severe weather history data come from?
Every figure is drawn from United States federal public-domain records: NOAA/NCEI Storm Events for the event archive, NOAA SPC SVRGIS for mapped tornado paths, FEMA for disaster declarations and risk ratings, and the U.S. Census for population context. Dates are shown in UTC and recent entries may still be revised by NOAA.
Nearby
Neighbouring counties
- Caroline County 265
- Baltimore County 1,320
- Carroll County 684
- Anne Arundel County 946
- Cecil County 534
- Allegany County 468
Cite this page
“Calvert County, Maryland.” Severe Weather History. severeweatherhistory.com/county/maryland/calvert-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.