St. Lawrence County Hail Map & Storm Reports
Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 14, 2026
St. Lawrence County, New York has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 1 tornado report among 43 severe weather events here in the last 12 months, alongside 9 hail reports with hail up to 2.75" and 33 high-wind reports with gusts up to 55 mph. The most recent recorded storm activity was in September 2026. This page updates daily: every event comes straight from official NOAA data — no estimates, no modeling, just the record.
St. Lawrence County hail map
Where hail and high-wind reports clustered across St. Lawrence County over the last 12 months. Heat shows report density and significance, not radar.
What the radar showed
Last 30 days in St. Lawrence County
Recent storms — full detail available in the app
Storm activity from the last 30 days is summarized at the county level on this page. Exact locations, radar snapshots, and official warning boundaries for recent events are available with a free account.
See the specifics — free →Storm log — the official record, day by day
Events older than 30 days, as recorded by the National Weather Service and Storm Prediction Center. Excerpts are quoted directly from official warnings and verified reports.
Friday, August 14, 2026
2 SPC verified storm reports
“Tree reported down on Hailesboro Street in the village of Gouverneur. (BTV)”
- Wind Unknown Gouverneur SPC verified report
- Wind Unknown 3 WNW Edwardsville SPC verified report
Wednesday, August 12, 2026
2 NWS warnings — hail up to 0.5"
“At 234 PM EDT, Doppler radar was tracking a strong thunderstorm over Dickinson, moving southeast at 25 mph. Hazard: Wind gusts up to 40 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
“At 137 PM EDT, Doppler radar was tracking a strong thunderstorm over Louisville, moving east at 30 mph. Hazard: Wind gusts up to 40 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.5" St. Lawrence County NWS severe weather mention
- Hail 0.5" St. Lawrence County NWS severe weather mention
Monday, August 10, 2026
1 NWS warning — hail up to 0.5"
“At 943 PM EDT, Doppler radar was tracking a strong thunderstorm over Stockholm, moving east at 35 mph. Hazard: Wind gusts up to 50 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.5" St. Lawrence County NWS severe weather mention
Sunday, August 9, 2026
1 SPC verified storm report
“Tree reported across CR-47. Time estimated by radar. (BTV)”
- Wind Unknown 2 NNW Converse SPC verified report
Saturday, August 8, 2026
1 NWS warning — hail up to 0.5"
“At 358 PM EDT, Doppler radar was tracking a strong thunderstorm over Waddington, moving east at 10 mph. Hazard: Wind gusts up to 50 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
- Hail 0.5" St. Lawrence County NWS severe weather mention
Tuesday, July 14, 2026
7 SPC verified storm reports — hail up to 2.75"
“Social media image of hail ranging from 2 to 2.75 inches in diameter. (BTV)”
“Social media image of large hailstones ranging from 1.5 to 2 inches in diameter. (BTV)”
- Hail 2.75" Hermon SPC verified report
- Hail 2" De Peyster SPC verified report
- Hail 1.25" Horseshoe Lake SPC verified report
- Wind Unknown 4 E Horseshoe Lake SPC verified report
- Wind Unknown East De Kalb SPC verified report
- Wind Unknown Stark SPC verified report
- Wind Unknown 1 SW Ogdensburg SPC verified report
Thursday, July 2, 2026
2 SPC verified storm reports · 1 NWS warning — hail up to 0.5"
“At 359 PM EDT, Doppler radar was tracking a strong thunderstorm near Louisville, moving east at 30 mph. Hazard: Wind gusts up to 40 mph and half inch hail. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include...”
“Tree Reported down in the town of Hermon. Time estimated from Radar. (BTV)”
- Hail 0.5" St. Lawrence County NWS severe weather mention
- Wind Unknown Hermon SPC verified report
- Wind Unknown 2 NE Morristown SPC verified report
Wednesday, July 1, 2026
1 SPC verified storm report
“Trees and lines down in the Norfolk area. (BTV)”
- Wind Unknown Norfolk SPC verified report
Tuesday, June 30, 2026
5 SPC verified storm reports
“Many trees down on a property on County Road 21 in Hermon. (BTV)”
“Corrects previous tstm wnd dmg report from Gouverneur. Multiple trees down throughout the town. (BTV)”
- Wind Unknown 1 S Hermon SPC verified report
- Wind Unknown Gouverneur SPC verified report
- Wind Unknown Hammond SPC verified report
- Wind Unknown Colton SPC verified report
- Wind Unknown Pierrepont SPC verified report
Monday, June 29, 2026
3 SPC verified storm reports
“Report of trees down in Potsdam. Time estimated by radar. (BTV)”
“Tree down across State Highway 812. Time estimated by radar. (BTV)”
- Wind Unknown Potsdam SPC verified report
- Wind Unknown 1 NW Heuvelton SPC verified report
- Wind Unknown 2 W Chipman SPC verified report
Friday, May 29, 2026
1 SPC verified storm report · 2 NWS warnings — wind gusts up to 50 mph, 1 tornado report
“Public reported a tornado between North Hammond and Brier Hill... New York. Video indicates the EF-0 tornado touched down in the nearby corn field and toppled an apple (BTV)”
“At 556 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Clinton to near Bellmont to near Stockholm. Movement was southeast at 40 mph. Hazard: Wind gusts up to 50 mph. well as cloud to ground lightning. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”
- Tornado Tornado 1 NE North Hammond SPC verified report
- Wind 50 mph St. Lawrence County NWS severe weather mention
- Wind 50 mph St. Lawrence County NWS severe weather mention
Tuesday, May 5, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...Southwest winds 15 to 30 mph with gusts up to 50 mph expected. WHERE...Eastern Clinton, Northern Franklin, Northern St. Lawrence, Southern Franklin, Southwestern St. Lawrence, Western Clinton, and Western Essex Counties. WHEN...Until 8 PM EDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...Southwest winds 15 to 30 mph with gusts up to 50 mph expected. WHERE...Clinton, Franklin, Northern St. Lawrence, Southwestern St. Lawrence, and Western Essex Counties. WHEN...From 11 AM this morning to 8 PM EDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph St. Lawrence County NWS severe weather mention
- Wind 50 mph St. Lawrence County NWS severe weather mention
Thursday, April 16, 2026
1 SPC verified storm report
“Trees down along Mill Road near Silver Lake. (BTV)”
- Wind Unknown Cranberry Lake SPC verified report
Monday, April 13, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph expected. WHERE...Franklin, Northern St. Lawrence, Western Clinton, and Western Essex Counties. WHEN...From 6 AM this morning to 2 PM EDT this afternoon. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph St. Lawrence County NWS severe weather mention
Sunday, April 5, 2026
1 NWS warning — wind gusts up to 55 mph
“WHAT...South winds 20 to 30 mph with gusts up to 55 mph. WHERE...Portions of northern New York and northern Vermont. WHEN...Until 8 AM EDT this morning. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down resulting in isolated to scattered power outages.”
- Wind 55 mph St. Lawrence County NWS severe weather mention
Saturday, April 4, 2026
2 NWS warnings — wind gusts up to 55 mph
“WHAT...South winds 15 to 25 mph with gusts up to 50 mph expected, localized higher gusts up to 55 mph possible from Malone to Altona. WHERE...Portions of northern New York and northwest Vermont. WHEN...From 8 PM this evening to 8 AM EDT Sunday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down with isolated to scattered power outages possible.”
“WHAT...South winds 15 to 25 mph with gusts up to 50 mph expected. WHERE...Portions of northern New York and northwest Vermont. WHEN...From 8 PM this evening to 8 AM EDT Sunday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. ADDITIONAL DETAILS...Strongest winds are expected between 11 PM and 6 AM.”
- Wind 55 mph St. Lawrence County NWS severe weather mention
- Wind 50 mph St. Lawrence County NWS severe weather mention
Friday, April 3, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...South winds 20 to 25 mph with gusts up to 50 mph expected. WHERE...Northern New York and Northwestern Vermont WHEN...From 8 PM Saturday to 8 AM EDT Sunday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph St. Lawrence County NWS severe weather mention
Tuesday, March 17, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Southwest to west winds 15 to 30 mph with gusts up to 50 mph. WHERE...Portions of northern New York and central, northeast, northwest, and southern Vermont. WHEN...Until 11 AM EDT this morning. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and isolated power outages could occur.”
- Wind 50 mph St. Lawrence County NWS severe weather mention
Monday, March 16, 2026
2 NWS warnings — wind gusts up to 55 mph
“WHAT...South winds 15 to 25 mph with gusts up to 45 to 55 mph. WHERE...Portions of northern New York and Vermont. WHEN...Until 11 AM EDT Tuesday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and isolated power outages could occur.”
“WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph. WHERE...Portions of northern New York and Vermont. WHEN...Until 11 AM EDT Tuesday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph St. Lawrence County NWS severe weather mention
- Wind 50 mph St. Lawrence County NWS severe weather mention
Monday, March 9, 2026
1 NWS warning — wind gusts up to 50 mph
“WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph expected. WHERE...St. Lawrence Valley. WHEN...From 10 AM this morning to 6 PM EDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph St. Lawrence County NWS severe weather mention
Friday, January 9, 2026
1 NWS warning — wind gusts up to 50 mph
“At 516 PM EST, Doppler radar was tracking gusty showers along a line extending from 19 miles northwest of Ogdensburg to near Morristown Village to 10 miles northwest of Stony Point. Movement was northeast at 70 mph. Hazard: Wind gusts up to 50 mph. Impact: Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...”
- Wind 50 mph St. Lawrence County NWS severe weather mention
Today's severe weather outlook
Common questions
When was the last severe storm in St. Lawrence County, NY?
The most recent recorded event was in September 2026. Official NWS and SPC records show 43 severe weather events in St. Lawrence County over the last 12 months. Exact dates and locations for recent storms are available in the app with a free account.
Did it hail in St. Lawrence County recently?
Yes — 9 hail reports in the last 12 months, with hail up to 2.75" recorded. The hail map above shows where reports clustered; the storm log lists each day.
How do I see hail history for a specific address in St. Lawrence County?
Create a free IDOLCheck account and run an address check. It shows verified storm reports and official NWS warning boundaries around any specific property, including the most recent 30 days — county-level pages like this one only tell part of the story.