10 days with hail of 1 inch or larger have been logged in 80503 (Longmont) since 1996, 1.8 times the Boulder County ZIP average of 5.5.
Area name is an approximation from Census ZCTA data. Method and limits.
Largest storm: June 19, 2018
1.5-inch (ping pong ball) hail near Niwot. Hail to 3 inches battered the north Denver metro, with some roofs reported collapsed. RMIIA put property damage near $276 million. Also the largest report in 80012, 80015, 80111, 80120. (NOAA NCEI event 752347, episode 125436)
80503 vs. the Boulder County average
| Since 1996 | 80503 | Boulder Co. ZIP avg. (17) |
|---|---|---|
| Days with 1 in.+ hail | 10 | 5.5 |
| Reports 1 in.+ | 15 | 9.4 |
| Reports 1.75 in.+ | 0 | |
| All reports | 19 | |
| Last report | May 30, 2024 |
Hail days here run 1.8 times the county ZIP average.
Homes in 80503
| Housing (2020-2024) | 80503 | Boulder Co. |
|---|---|---|
| Median year built | 1994 | 1980 |
| Built before 1980 | 26.6% | 37.3% |
| Built before 2000 | 65.1% | |
| Owner-occupied | 66.1% | 64.8% |
| Housing units | 15,737 |
Source: Census ACS 5-year, 2020-2024.
Every one of the 15 reports here was at least the 1-inch size that an IIBEC table ties to damage on 3-tab shingles; 0 reached 1.75 inches. With a median build year of 1994 and 65.1% of homes built before 2000, an original roof on a typical house here has been through most of the storms listed above. (IIBEC)
Reports by decade
| Decade | All | 1 in.+ | 1.75 in.+ |
|---|---|---|---|
| 1996-99 | 2 | 2 | 0 |
| 2000s | 1 | 1 | 0 |
| 2010s | 10 | 7 | 0 |
| 2020s | 6 | 5 | 0 |
Every 1 in.+ hail day in 80503
1996: July 12 (1.25); 1997: June 25 (1); 2008: May 22 (1); 2011: July 13 (1); 2018: June 19 (1.5); 2019: July 5 (1.25), Sept. 11 (1); 2020: July 31 (1); 2023: May 9 (1); 2024: May 30 (1).
10 largest reports
| Date | Hail | NCEI |
|---|---|---|
| June 19, 2018 | 1.5 in. (ping pong ball) | 752347 |
| July 5, 2019 | 1.25 in. (half dollar) | 824824 |
| June 19, 2018 | 1.25 in. (half dollar) | 752353 |
| July 12, 1996 | 1.25 in. (half dollar) | 5558271 |
| May 30, 2024 | 1 in. (quarter) | 1176546 |
| May 30, 2024 | 1 in. (quarter) | 1176547 |
| May 9, 2023 | 1 in. (quarter) | 1086700 |
| May 9, 2023 | 1 in. (quarter) | 1099424 |
| July 31, 2020 | 1 in. (quarter) | 902820 |
| Sept. 11, 2019 | 1 in. (quarter) | 844822 |
Neighboring ZIP pages: 80501 (Longmont) · 80601 (Brighton)
Denver metro hail history · Denver hail damage repair · Free roof inspection · Boulder County ZIPs
