NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Guerneville, CA
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
No tropical storm or hurricane has passed within 75 miles of Guerneville, California since records began in 1851. Since 1950, 13 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 13
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Guerneville
The strongest of the 13 tornadoes within 25 miles was an F2 on June 1, 1958; its path came within 14 miles. Of the 13, none had a path within 5 miles of the city centre, and 3 have come since 2000. December has had the most tornadoes, 6. The most recent tornado was on March 18, 2011. Of the 705 California cities on this site, 50% have more tornadoes within 25 miles than Guerneville. Hail has been reported within 10 miles 5 times since 2003, with stones up to 0.75 inches (penny size). Guerneville has more hail reports within 10 miles than 62% of the 705 California cities.
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Tornadoes within 25 miles of Guerneville
By decade
- 2010s1
- 2000s2
- 1990s6
- 1980s1
- 1960s1
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 1, 1958 | F2 | 14 mi | 15 mi | 0 / 0 |
| Mar 18, 2011 | EF1 | 16 mi | 0.1 mi | 0 / 0 |
| Jan 27, 2005 | F1 | 10 mi | 0.5 mi | 0 / 0 |
| Dec 5, 1998 | F1 | 17 mi | 1.5 mi | 0 / 0 |
| Dec 23, 1996 | F1 | 18 mi | 6 mi | 0 / 0 |
| Feb 22, 1996 | F1 | 15 mi | 1 mi | 0 / 0 |
| Dec 2, 1992 | F1 | 10 mi | 3 mi | 0 / 0 |
| Dec 2, 1992 | F1 | 12 mi | 1 mi | 0 / 0 |
| Dec 2, 1992 | F1 | 9 mi | 7.5 mi | 0 / 0 |
| Feb 27, 1983 | F1 | 17 mi | 0.8 mi | 0 / 0 |
| Nov 10, 1964 | F1 | 11 mi | 1 mi | 0 / 0 |
| Feb 17, 1959 | F1 | 14 mi | 0.5 mi | 0 / 0 |
The strongest 12 of 13, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Guerneville
The Storm Prediction Center has 5 hail reports within 10 miles of Guerneville since 2003, made on 4 separate days. None of them reached 1 inch. The largest, 0.75 inches (penny size), fell on December 10, 2003. The most recent report is from February 15, 2019.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Guerneville
The nearest NOAA station with 1991–2020 climate normals is Graton, CA, 9 miles southeast of Guerneville at 200 feet. August is the warmest, with an average high of 84°F and low of 50°F; December is the coolest, at 58°F and 37°F. December is the wettest at 8.3 inches of precipitation on average and July the driest at 0.0 inches; the year adds up to 40.0 inches over 52 days with at least a tenth of an inch. Highs reach 90°F on about 34 days a year, almost all from May to October. Lows fall below freezing on about 43 nights a year. That 40.0 inches is more than at 202 of the 226 California stations used on this site (89%). Healdsburg, 10 miles northeast, has its own station (Healdsburg, CA): 42.9 inches a year, 2.9 more than here, and an August average high of 88°F against 84°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 58 | 37 | 7.9 | 9 |
| Feb | 62 | 39 | 7.5 | 9 |
| Mar | 66 | 41 | 5.2 | 8 |
| Apr | 70 | 42 | 2.6 | 5 |
| May | 75 | 46 | 1.4 | 2 |
| Jun | 81 | 48 | 0.4 | 1 |
| Jul | 83 | 51 | 0.0 | 0 |
| Aug | 84 | 50 | 0.1 | 0 |
| Sep | 84 | 48 | 0.2 | 1 |
| Oct | 78 | 44 | 2.0 | 3 |
| Nov | 67 | 40 | 4.4 | 6 |
| Dec | 58 | 37 | 8.3 | 9 |
| Year | 72 | 44 | 40.0 | 52 |
Averages for 1991–2020 at Graton, CA (200 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 Guerneville
Since 1996, the National Weather Service has logged 83 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Guerneville: 69 floods, 9 heavy rain events and 5 flash floods. They killed 2 people and injured 0, and the NWS estimated $214.3 million in property and crop damage. January has had the most flash floods, 3 of 5. Of the 550 California cities on this site with a flash flood on record, 163 have had fewer than Guerneville.
January 9, 2023: flood 7 miles from the centre of Guerneville — 1 killed.
November 23, 2024: flood in Guerneville — 1 killed.
NWS: “A 911 caller reported to Sonoma County dispatch that they had seen a car go into floodwaters near Mays Canyon Road and Highway 116. Rescue crews arrived and found the vehicle, and the driver was found dead.”
December 31, 2005: flood 8 miles from the centre of Guerneville — $107.0 million 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
Flood insurance policyholders in Guerneville's ZIP code 95446 have filed 3,952 claims with the National Flood Insurance Program since 1978, and were paid $69.5 million for buildings and contents, in the dollars of each year. The most came from Flooding in 1995: 2,317 claims (59% of all) and $37.2 million, then Pineapple Express - Southern in 1998 with 145 and California Atmospheric River in 2023 with 27. 63% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 415 California cities on this site with 10 or more claims, 414 have fewer than Guerneville.
| Event | Claims | Paid |
|---|---|---|
| Flooding1995 | 2,317 | $37.2 million |
| Pineapple Express - Southern1998 | 145 | $497,000 |
| California Atmospheric River2023 | 27 | $117,000 |
| San Diego Flooding2024 | 11 | $17,000 |
Sonoma County, which includes Guerneville, has been named in 36 federal disaster or emergency declarations since 1964, 23 of them major disasters (by incident: 11 fires, 9 floods, 9 severe storms, 2 biological emergencies). The latest major disaster declaration was Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides, on April 3, 2023. FEMA's National Risk Index gives Sonoma County a Relatively High rating for natural hazard risk overall; by hazard: Relatively High for inland flooding; Relatively Moderate for coastal flooding, lightning and heat waves; Very Low for tornadoes, hail and strong wind. It models the county's expected loss from all 18 hazards it covers at $604.7 million a year, the 12th highest of 58 California counties; of the hazards above, the largest share, $279.8 million (46%), 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 Guerneville
- Forestville, CA5 mi
- Healdsburg, CA10 mi
- Windsor, CA11 mi
- Sebastopol, CA12 mi
- Santa Rosa, CA16 mi
- Cloverdale, CA20 mi
- Rohnert Park, CA20 mi
- Cotati, CA20 mi
- Calistoga, CA22 mi
- Penngrove, CA23 mi
- Petaluma, CA27 mi
- Glen Ellen, CA28 mi
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