Hail in St. Louis on Friday, March 31, 2023
The Storm Prediction Center logged 26 hail reports in St. Louis on Friday, March 31, 2023, between 5:15 pm and 6:54 pm CDT, in 5 of the metro's 12 counties. The largest was 1.75 inches at 3 WNW Belleville (St. Clair, IL) at 6:37 pm. NOAA radar flagged 872 hail signatures inside the metro that day: 133 rated a 100% chance of hail and 183 with a maximum expected size of 1 inch or more.
Where hail was reported
Reports came from 12 places in Franklin, MO, Jefferson, MO, Lincoln, MO, Monroe, IL and St. Clair, IL, named as the National Weather Service described them.
- Belleville 7 reports, up to 1.75 in
- O'fallon 3 reports, up to 1.50 in
- Swansea 3 reports, up to 1.25 in
- Crystal City 2 reports, up to 1.50 in
- De Soto 2 reports, up to 1.00 in
- Sullivan 2 reports, up to 1.75 in
- Valmeyer 2 reports, up to 1.50 in
- Festus 1 report, up to 1.75 in
- Hematite 1 report, up to 1.00 in
- Millstadt 1 report, up to 1.00 in
- Shiloh 1 report, up to 1.00 in
- Troy 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 |
|---|---|---|---|---|
| 5:15 pm | 1.25 | Sullivan | Franklin, MO | SPOTTER CALLED BACK WITH AN UPDATE OUT OF SULLIVAN. LARGEST HAIL THE SPOTTER OBSERVED WAS SLIGHTLY LARGER THAN A QUARTER. TIME ESTIMATED BY RADAR. (LSX) |
| 5:16 pm | 1.75 | Sullivan | Franklin, MO | ALSO REPORTED ROTATING WALL CLOUD. (LSX) |
| 5:25 pm | 1.00 | Troy | Lincoln, MO | (LSX) |
| 6:10 pm | 1.00 | 1 ESE De Soto | Jefferson, MO | DELAYED REPORT... TIME ESTIMATED FROM RADAR. (LSX) |
| 6:18 pm | 1.75 | 1 NNW Festus | Jefferson, MO | REPORT FROM MPING: GOLF BALL (1.75 IN.). (LSX) |
| 6:19 pm | 1.50 | 1 N Crystal City | Jefferson, MO | DELAYED REPORT... TIME ESTIMATED FROM RADAR. (LSX) |
| 6:20 pm | 1.00 | 2 ESE De Soto | Jefferson, MO | (LSX) |
| 6:31 pm | 1.00 | 2 ESE Hematite | Jefferson, MO | (LSX) |
| 6:32 pm | 1.50 | Crystal City | Jefferson, MO | DELAYED REPORT. (LSX) |
| 6:36 pm | 1.00 | 4 N Millstadt | St. Clair, IL | DELAYED REPORT. REPORT FROM MPING: QUARTER (1.00 IN.). (LSX) |
| 6:37 pm | 1.00 | 1 ENE Valmeyer | Monroe, IL | (LSX) |
| 6:37 pm | 1.75 | 3 WNW Belleville | St. Clair, IL | (LSX) |
| 6:38 pm | 1.00 | 2 SSW Belleville | St. Clair, IL | DELAYED REPORT. REPORT FROM MPING: QUARTER (1.00 IN.). (LSX) |
| 6:38 pm | 1.00 | 1 ESE Belleville | St. Clair, IL | (LSX) |
| 6:39 pm | 1.50 | Valmeyer | Monroe, IL | (LSX) |
| 6:39 pm | 1.00 | 1 NNW Belleville | St. Clair, IL | DELAYED REPORT. (LSX) |
| 6:39 pm | 1.50 | 3 WNW Belleville | St. Clair, IL | REPORT FROM MPING: PING PONG BALL (1.50 IN.). (LSX) |
| 6:40 pm | 1.25 | 1 WNW Swansea | St. Clair, IL | REPORT VIA FACEBOOK WITH PICTURE. (LSX) |
| 6:41 pm | 1.00 | 1 W Shiloh | St. Clair, IL | DELAYED REPORT... TIME ESTIMATED FROM RADAR. REPORT FROM MPING: QUARTER (1.00 IN.). (LSX) |
| 6:42 pm | 1.50 | Belleville | St. Clair, IL | (LSX) |
| 6:42 pm | 1.00 | 1 WNW Swansea | St. Clair, IL | CORRECTS PREVIOUS HAIL REPORT FROM 1 WNW SWANSEA. (LSX) |
| 6:42 pm | 1.25 | O'fallon | St. Clair, IL | DELAYED REPORT... TIME ESTIMATED FROM RADAR. REPORT FROM MPING: HALF DOLLAR (1.25 IN.). (LSX) |
| 6:44 pm | 1.25 | 2 NW Swansea | St. Clair, IL | DELAYED REPORT... TIME ESTIMATED FROM RADAR. (LSX) |
| 6:53 pm | 1.50 | 3 WNW Belleville | St. Clair, IL | REPORTED VIA FACEBOOK WITH PICTURE. (LSX) |
| 6:54 pm | 1.50 | 1 SSE O'fallon | St. Clair, IL | SPOTTER OBSERVED QUARTER SIZE HAIL WITH A FEW STONE SLIGHTLY SMALLER THAN GOLF BALLS. (LSX) |
| 6:54 pm | 1.00 | 1 N O'fallon | St. Clair, IL | SPOTTER OBSERVED ONE INCH HAIL AND MEASURED 65 MPH GUST WITH A HANDHELD ANEMOMETER. (LSX) |
What NEXRAD radar recorded inside the metro
872 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; 133 were rated 100% and 6 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 |
|---|---|---|---|---|---|---|---|
| KSTL | 446 | 65 | 104 | 1 | 2.00 in | 2:29 am | 8:57 pm |
| KLSX | 131 | 20 | 30 | 2 | 2.00 in | 3:45 am | 9:12 pm |
| KILX | 112 | 21 | 16 | 0 | 1.75 in | 3:10 am | 9:08 pm |
| KPAH | 98 | 16 | 19 | 2 | 2.25 in | 5:36 pm | 9:08 pm |
| KVWX | 82 | 11 | 14 | 1 | 2.25 in | 1:22 pm | 9:07 pm |
| KSGF | 3 | 0 | 0 | 0 | 0.50 in | 4:45 pm | 4:54 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 March 31, 2023
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 St. Louis when its coordinates fall inside one of the metro's 12 counties (the counties of St. Louis, MO, St. Louis City, MO, St. Charles, MO, Jefferson, MO, Franklin, MO, Lincoln, MO, Warren, MO, Madison, IL, St. Clair, IL, Monroe, IL, Jersey, IL and Clinton, IL). 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.