Grand Isle County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Grand Isle County: 0.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

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).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

More event types since 1996

Costliest events since 1996

1. May 1, 2011Lakeshore Flood, Grand Isle$3.0 million
   National Weather Service narrative

   Record lake flood levels as well as several high wind, damaging waves and seiche events caused considerable and major flooding of lake shore roads, residents and businesses. The flooding began April 13th and ended June 18th.

2. Jun 28, 2016Lightning$1.7 million
   National Weather Service narrative

   Lightning struck a large residence that caused a fire that completely destroyed the home.

3. Jan 6, 1998Ice Storm, Grand Isle$1.5 million
   National Weather Service narrative

   A storm system moved from the Tennessee Valley on Wednesday (January 7) and Thursday (January 8) into New England thereafter. A cold front across New England and New York associated with an Arctic High Pressure system across Canada resulted in a flow of low level cold air into northern Vermont. Warm moist air riding over this low level cold air resulted in a major ice storm across northwest Vermont. During Friday afternoon (January 9), a few thunderstorms with gusty winds and small hail moved across the Champlain Valley of Vermont. Ice accumulations during this event were generally between 1 and 2 inches with locally greater accumulations over portions of Grand Isle county…

4. Aug 28, 2011High Wind, Grand Isle$750,000
   National Weather Service narrative

   Strong to damaging north winds of 35 to 45 mph sustained with estimated gusts in excess of 60 mph buffeted Grand Isle county and Lake Champlain. Estimated wave heights of 4 to 6 feet and possibly higher damaged boats, moorings and knocked down or uprooted numerous trees with thousands of customers without power.

5. Dec 20, 2013Ice Storm, Grand Isle$250,000
   National Weather Service narrative

   Freezing rain accumulated around an inch across Grand Isle causing numerous vehicle accidents as well as damage to trees and utility lines.

6. Aug 16, 2007Thunderstorm Wind$250,000
   National Weather Service narrative

   Numerous trees and powerlines down in Grand Isle, which have blocked and closed several roads including Route 2. Trees fell and trapped drivers in two vehicles with no injuries reported. Wind damage in the form of trees piercing through roofs, crushed vehicles, docks and patios torn off to several camps along the west shore of Route 2, including Irish Rover Lane.

7. Aug 9, 2024High Wind, Grand Isle$200,000
   National Weather Service narrative

   Estimated wind gusts and or local mesonet observations in excess of 50-55 mph across fully leaved trees resulted in numerous reports of downed branches and trees on utility lines, structures and property (Vehicles). One large tree fell on a home in Alburgh that destroyed the home and initially trapped 3 people with one remaining trapped for several hours.

8. Jul 18, 2008Thunderstorm Wind$100,000
   National Weather Service narrative

   Hundreds of trees downed by thunderstorms winds with several fallen on houses in Isle La Motte.

9. Jun 10, 2008Thunderstorm Wind$100,000
   National Weather Service narrative

   Numerous trees down that have blocked roads and caused structural damage throughout Alburgh.

10. Dec 23, 2022Strong Wind, Grand Isle$100,000
    National Weather Service narrative

    Limited observations, but based on tree damage at several locations, likely experienced wind gusts in the 50-55 mph range. Numerous branches, trees downed by winds as well as power outages.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

101°FAug 11, 1944

All-time low

−30°F2 times, most recently Feb 12, 1979

Warmest night

80°F2 times, most recently Jun 19, 2024

Coldest day

−13°FJan 4, 1981

Wettest day

3.99 inJun 14, 1942

Snowiest day

25.3 inFeb 14, 2007

Hottest year

2024mean 51.0°F

Coldest year

1968mean 41.8°F

Wettest year

201150.92 in

Driest year

200123.27 in

Snowiest season

145.4 in1970-71

Station Burlington International Airport (USW00014742), 332 ft elevation, 23.8 miles from the population centre. Daily records from 1940 to October 28, 2026; 100.0% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

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).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USW00014742.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built November 1, 2026.