Preliminary NWS reports for Houston on March 21, 2024 via the Storm Prediction Center. NCEI check for Houston on Mar 21, 2024: NCEI final record: confirmed (StormEvents_details-ftp_v1.0_d2024_c20260728.csv.gz, compiled July 28, 2026). The Houston record that holds Mar 21, 2024 last changed October 10, 2026.
The Day In Numbers
| Reports of 1 inch or larger | 9 |
|---|---|
| Counties reporting | 2: Harris, Liberty |
| Largest stone (inches) | 1.75 |
| Reports 1.75 inches or larger | 1 |
For Houston, the Storm Prediction Center date runs from 12:00 UTC on March 21, 2024 to 12:00 UTC the next day, soHouston reports timed 00:00 to 11:59 UTC happened on the evening of March 21, 2024 in Texas. For Houston on Mar 21, 2024, stone size is the diameter in inches as reported to the National Weather Service.
Every Report
| Time (UTC) | Size (inches) | Location | County |
|---|---|---|---|
| 00:00 | 1 | 5 ESE Aldine | Harris |
| 02:29 | 1.75 | 2 N Plum Grove | Liberty |
| 23:05 | 1.25 | 4 S Cypress | Harris |
| 23:19 | 1 | 5 W Jersey Village | Harris |
| 23:25 | 1 | 1 NNW Jersey Village | Harris |
| 23:30 | 1.25 | 1 SSE Jersey Village | Harris |
| 23:34 | 1 | 4 ENE Jersey Village | Harris |
| 23:38 | 1.25 | 5 SW Aldine | Harris |
| 23:54 | 1 | 3 SE Aldine | Harris |
Largest Report On March 21, 2024
The largest stone reported on March 21, 2024 was 1.75 inches at 2 N Plum Grove, Liberty County, timed 02:29 UTC.No other Houston report on Mar 21, 2024 matched 1.75 inches. The note the Houston area forecast office attached to it on March 21, 2024 reads: “Golf ball sized hail was reported in Plum Grove; (HGX)”
Reports By County On Mar 21, 2024
| County | Reports | Largest (inches) | Sizes in report order (inches) |
|---|---|---|---|
| Liberty | 1 | 1.75 | 1.75 |
| Harris | 8 | 1.25 | 1, 1.25, 1, 1, 1.25, 1, 1.25, 1 |
The 9 reports on March 21, 2024 were spread over 2 counties, and Liberty County held the largest stone at 1.75 inches. Liberty County logged 1 report with a largest stone of 1.75 inches on March 21, 2024. Harris County logged 8 reports with a largest stone of 1.25 inches on March 21, 2024.
What The Reporters Wrote
- 00:00 UTC, 5 ESE Aldine, Harris County, 1 inch: Quarter sized hail was reported via mPing; (HGX)
- 02:29 UTC, 2 N Plum Grove, Liberty County, 1.75 inches: Golf ball sized hail was reported in Plum Grove; (HGX)
- 23:05 UTC, 4 S Cypress, Harris County, 1.25 inches: Quarter to just under half dollar sized hail was observed; (HGX)
- 23:19 UTC, 5 W Jersey Village, Harris County, 1 inch: Quarter sized hail was observed; (HGX)
- 23:25 UTC, 1 NNW Jersey Village, Harris County, 1 inch: Nickel to quarter size hail was observed; (HGX)
- 23:30 UTC, 1 SSE Jersey Village, Harris County, 1.25 inches: Half dollar sized hail was observed; (HGX)
- 23:34 UTC, 4 ENE Jersey Village, Harris County, 1 inch: Quarter sized hail was observed; (HGX)
- 23:38 UTC, 5 SW Aldine, Harris County, 1.25 inches: Half dollar sized hail was observed; (HGX)
- 23:54 UTC, 3 SE Aldine, Harris County, 1 inch: Quarter sized hail was observed; (HGX)
Other Hail Days Within 30 Days Of Mar 21, 2024
2 other days in the Houston record had hail of 1 inch or larger within 30 days of March 21, 2024. A Houston roof hit on March 21, 2024 and again on one of these dates can carry damage from both, which matters when a claim is filed for only one date.
- Houston, 5 days before Mar 21, 2024: March 16, 2024, 2 reports, largest 1.25 inches.
- Houston, 6 days before Mar 21, 2024: March 15, 2024, 17 reports, largest 2.75 inches.
Reading A Preliminary Record Against The Final One
The reports above come from the Storm Prediction Center file for Houston on March 21, 2024, pulled October 10, 2026. The Houston file for Mar 21, 2024 is preliminary: forecast offices logged its 9 reports as they arrived, and a spotter, a broadcaster or a social media post can each be the source. The NCEI Storm Events record is the reviewed version, and for Houston on Mar 21, 2024 it is checked against a file that reaches June 2, 2026, 803 days later. For March 21, 2024 in Houston the NCEI record does list hail, so a reviewed entry exists for this date. Sizes and counts for Houston on Mar 21, 2024 can still differ between the two records, so use the NCEI entry when the two disagree.
If Your Roof Was Under This
Compare the Houston report locations for March 21, 2024 with your address, then get a documented inspection before you file anything. See the Houston hail history for how Mar 21, 2024 compares. For a Houston roof after March 21, 2024, the hail claim calculator shows whether a claim nets anything after your deductible. Before you sign anything in Houston after Mar 21, 2024, use the check-a-roofer guide. For a Houston roof hit on March 21, 2024, chapter 707 bars a Texas contractor from negotiating the claim for you. After Mar 21, 2024, see the Houston roofing company ranking and the company directory.
Previous storm day: March 15, 2024 | Next storm day: May 12, 2024 | All Houston storm days | Latest storm day: June 2, 2026
Get matched with a vetted Houston roofer
Want to talk to a specific ranked company instead? Every listed company’s own phone number is on their profile.
Sources
- NOAA Storm Prediction Center, preliminary local storm reports for Houston on March 21, 2024, pulled October 10, 2026, preliminary and subject to review. https://www.spc.noaa.gov/climo/reports/240321_rpts.html.
- NOAA National Centers for Environmental Information, Storm Events Database bulk files, the record the Houston March 21, 2024 status line above checks (record reaches June 2, 2026, pulled October 10, 2026, reviewed record). https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/.