Hail in Birmingham on Friday, April 9, 2021
The Storm Prediction Center logged 12 hail reports in Birmingham on Friday, April 9, 2021, between 12:52 pm and 3:06 pm CDT, in 3 of the metro's 5 counties. The largest was 1.75 inches at 1 WNW Sumiton (Walker County) at 1:25 pm. NOAA radar flagged 808 hail signatures inside the metro that day: 171 rated a 100% chance of hail and 202 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 9 places in Blount, Jefferson and Walker counties, named as the National Weather Service described them.
- Dora 2 reports, up to 1.00 in
- Lupton 2 reports, up to 1.00 in
- Sumiton 2 reports, up to 1.75 in
- Arkadelphia 1 report, up to 1.00 in
- Holly Grove 1 report, up to 1.00 in
- Kimberly 1 report, up to 1.00 in
- Manchester 1 report, up to 1.00 in
- Morris 1 report, up to 1.00 in
- Palmerdale 1 report, up to 1.00 in
Every hail report logged that day
Times are Central Daylight Time. Sizes are in inches, as reported. The comment is the National Weather Service's text as published in the Storm Prediction Center's daily log.
| Time | Size | Place | County | NWS comment |
|---|---|---|---|---|
| 12:52 pm | 1.00 | 2 N Holly Grove | Walker | AT LEAST QUARTER SIZE HAIL ON I-22 IN WALKER COUNTY. VIA VIDEO ON SOCIAL MEDIA. (BMX) |
| 1:05 pm | 1.00 | 1 SW Lupton | Walker | HAIL REPORTED AT LUPTON SCHOOL... AT LEAST QUARTER SIZE PICTURES VIA SOCIAL MEDIA. (BMX) |
| 1:18 pm | 1.00 | Dora | Walker | PICTURE OF QUARTER SIZE HAIL RECEIVED THROUGH SOCIAL MEDIA NEAR DORA. (BMX) |
| 1:18 pm | 1.00 | 1 WSW Lupton | Walker | QUARTER SIZE HAIL REPORTED AT LUPTON SCHOOL. (BMX) |
| 1:22 pm | 1.00 | Dora | Walker | QUARTER SIZE HAIL REPORTED ON SHARON BLVD IN DORA. VIA SOCIAL MEDIA. (BMX) |
| 1:25 pm | 1.75 | 1 WNW Sumiton | Walker | REPORT RELAYED FROM AMATEUR RADIO OPERATOR. (BMX) |
| 1:28 pm | 1.00 | Sumiton | Walker | SEVERAL REPORTS OF QUARTER SIZE HAIL IN SUMITON. SOME OF THE HAIL TOTALLY COVERED DECKS. VIA SOCIAL MEDIA. (BMX) |
| 1:40 pm | 1.00 | 1 NW Kimberly | Jefferson | QUARTER SIZE HAIL RECEIVED THROUGH SOCIAL MEDIA. (BMX) |
| 1:51 pm | 1.00 | 1 E Morris | Jefferson | REPORT FROM MPING: QUARTER (1.00 IN.). (BMX) |
| 2:02 pm | 1.00 | Palmerdale | Jefferson | HAIL... SOME UP TO THE SIZE OF QUARTERS... COVERED SOME DECKS NEAR PALMERDALE. (BMX) |
| 2:18 pm | 1.00 | 3 NNW Manchester | Walker | QUARTER SIZE HAIL REPORTED BETWEEN CURRY AND MANCHESTER. SOME HAIL MAY HAVE BEEN LARGER. (BMX) |
| 3:06 pm | 1.00 | 1 S Arkadelphia | Blount | REPORTS OF QUARTER SIZE HAIL NEAR ARKADELPHIA. (BMX) |
What NEXRAD radar recorded inside the metro
808 signatures from 6 radars fell inside the metro's counties on this local date, counting every cell the algorithm rated from a 10% to a 100% chance of hail; 171 were rated 100% and 32 had a maximum expected size of 2 inches or more.
| Radar | Signatures | Rated 100% | 1 in or more | 2 in or more | Largest expected | First | Last |
|---|---|---|---|---|---|---|---|
| KGWX | 200 | 42 | 49 | 15 | 2.50 in | 11:18 am | 11:31 pm |
| KBMX | 187 | 49 | 59 | 9 | 2.25 in | 11:17 am | 11:53 pm |
| KHTX | 165 | 38 | 47 | 4 | 2.25 in | 11:23 am | 11:59 pm |
| KMXX | 164 | 39 | 41 | 4 | 2.00 in | 11:20 am | 4:42 pm |
| KFFC | 72 | 3 | 6 | 0 | 1.25 in | 11:20 am | 4:41 pm |
| KEOX | 20 | 0 | 0 | 0 | 0.75 in | 11:26 am | 1:12 pm |
Each radar that scans a storm writes its own signature about every 4 to 6 minutes, so one storm produces many rows and overlapping radars count it more than once. The raw rows for this day are in NOAA's Severe Weather Data Inventory.
Check an address for April 9, 2021
See, free, how many hail signatures NOAA recorded within 1, 3 and 5 miles of one address that day and the nearest spotter report. The full report is $19.
Spotter reports come from the Storm Prediction Center's preliminary daily logs, grouped here by local calendar date (Central Daylight Time) and by county: a report counts for Birmingham when its coordinates fall inside one of the metro's 5 counties (Jefferson, Shelby, St. Clair, Blount and Walker counties). Radar signatures are estimates from the Hail Detection Algorithm, not measured stones; they include every cell it rated, from a 10% to a 100% probability of hail. How these pages are built.