Hail History

Hail history for Alameda County, California

Every NOAA hail report filed in Alameda County since 1999, with preliminary National Weather Service reports to November 3, 2026.

Readout · Alameda County

Last hail
Mar 30, 2024
0.25 in, pea size
Hail days, last 5 years
1
since Nov 3, 2021 · 1 report
Largest ever
0.75 in
penny · Feb 9, 1999

20 reports on 14 days since 1999 · #21 of 47 California counties

Hail map · Alameda County

10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
20 most recent reports with a location. Dot size and colour follow hail size. Open street map

For homeowners

Roof damage after hail? Get a free inspection

Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Alameda County is from March 30, 2024. A local roofer can check and document it at no cost.

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What the record says about Alameda County

The latest hail report in Alameda County is from March 30, 2024, 0.25 in (pea size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 0.25 in on March 30, 2024.

Over the 20 years 2006–2025, Alameda County logged 19 reports on 13 hail days, about 0.9 reports a year. That is about twice the median California county (0.4 a year) and ranks #21 of 47 California counties for all-time reports. Alameda County holds 2% of all 938 hail reports in California.

0% of reports with a size were 2 inches (hen egg) or larger, against 0% for the median California county. The largest hail on record here is 0.75 in (penny) on February 9, 1999 near Oakland.

Reports were up 1900% in 2016–2025 (19) compared with 2006–2015 (0). The busiest year was 2018, with 11 reports on 5 days. Hail here peaks in March (45% of reports); 20% fall between April and June.

Reports a year 2006–2025 average

  • Alameda County 0.9
  • Median California county 0.4

Hail days 2006–2025

  • Alameda County 13
  • Median California county 7

Share 2 in or larger of sized reports

  • Alameda County 0%
  • Median California county 0%

Hail over time

051015 1999: 1 reports, largest 0.75 in 2000 2005 2010 2015 2017: 2 reports, largest 0.25 in 2018: 11 reports, largest 0.25 in 2019: 2 reports, largest 0.25 in 2020: 2 reports, largest 0.25 in 2020 2021: 1 reports, largest 0.25 in 2024: 1 reports, largest 0.25 in 2025
Reports per year, 1999–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
0369 January: 5 reports (25%) Jan February: 1 reports (5%) Feb March: 9 reports (45%) Mar April: 4 reports (20%) Apr May Jun Jul Aug Sep Oct November: 1 reports (5%) Nov Dec
All 20 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 0
2024 1 1
2023 0
2022 0
2021 1 1
2020 11 2
2019 11 2
2018 164 11
2017 2 2

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Mar 30, 2024 1 0.25 in —

Largest hail on record

Largest hail reports in Alameda County
Date Size Location Damage Time · source
Feb 9, 1999 0.75 inpenny Oakland — 14:00 local · NCEI
Mar 30, 2024 0.25 inpea 10.53 ENE Piedmont $10 17:47 local · NCEI
Mar 15, 2021 0.25 inpea Pleasanton — 15:00 local · NCEI
Mar 17, 2020 0.25 inpea Pleasanton — 14:30 local · NCEI
Nov 26, 2019 0.25 inpea 1 WSW Oakland — 23:00 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Alameda County
Date Size Location Damage Time · source
Mar 30, 2024 0.25 inpea 10.53 ENE Piedmont $10 17:47 local · NCEI
Mar 15, 2021 0.25 inpea Pleasanton — 15:00 local · NCEI
Mar 17, 2020 0.25 inpea Pleasanton — 14:30 local · NCEI
Jan 16, 2020 0.13 inpea 2 N Piedmont — 13:48 local · NCEI
Nov 26, 2019 0.25 inpea 1 WSW Oakland — 23:00 local · NCEI
Jan 20, 2019 0.25 inpea 2 E Pleasanton — 18:05 local · NCEI
Apr 16, 2018 0.25 inpea Oakland — 08:00 local · NCEI
Apr 16, 2018 0.25 inpea Berkeley — 07:35 local · NCEI
Apr 16, 2018 0.25 inpea 2 E Oakland — 06:35 local · NCEI
Apr 16, 2018 0.25 inpea Oakland — 06:20 local · NCEI
Mar 17, 2018 0.25 inpea 5 SE Dublin — 13:11 local · NCEI
Mar 17, 2018 0.25 inpea Dublin — 13:03 local · NCEI

Smaller places with fewer than 10 reports

These places have too few reports for a page of their own, so their record lives here.

PlaceReportsHail daysLatest
Oakland97Jan 16, 2020
Pleasanton55Mar 15, 2021
Berkeley22Apr 16, 2018
Dublin22Mar 17, 2018
Orinda22Apr 16, 2018

Questions about hail in Alameda County

How often does it hail in Alameda County, California?

20 hail reports have been logged in Alameda County since 1999. Over the 20 years 2006–2025 that averages 0.9 reports a year. That ranks #21 of 47 California counties by number of reports.

When is hail season in Alameda County?

Most reports come in March, January, April. March alone accounts for 45% of all reports.

What is the largest hail recorded in Alameda County?

0.75 in (penny size) on February 9, 1999 near Oakland. 0% of reports here were 2 inches or larger.

When did it last hail in Alameda County?

The most recent report in this data is from March 30, 2024 (0.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Alameda County had in the last five years?

1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was March 30, 2024.

Where does this hail data come from?

Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.