On the map: every storm report logged this day.
On the map
Storm reports for August 20, 2015
On August 20, 2015, 3 hail, 12 damaging-wind and 1 tornado reports were logged across 8 states.
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On August 20, 2015, 3 hail, 12 damaging-wind and 1 tornado reports were logged across 8 states. The largest hail reported was 1.00″ (quarter size) in Osceola County, FL.
Storm day runs 7 a.m. to 7 a.m. Eastern (12:00–12:00 UTC), the convention the Storm Prediction Center uses. Radar hail estimates start October 2019.
Storm reports by state
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| FL | 2 | 2 | 0 | 1.00″ |
| AZ | 1 | 2 | 0 | 0.75″ |
| PA | 0 | 2 | 1 | – |
| GA | 0 | 2 | 0 | – |
| TX | 0 | 1 | 0 | – |
| NJ | 0 | 1 | 0 | – |
| SC | 0 | 1 | 0 | – |
| VA | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| St. Cloud, FL | 71,036 | 1.00″ |
| Altamonte Springs, FL | 47,261 | 0.88″ |
| Casselberry, FL | 31,650 | 0.88″ |
| Maitland, FL | 19,776 | 0.88″ |
| Longwood, FL | 17,089 | 0.88″ |
Hail reports (3)
| Time (UTC) | Size | Location |
|---|---|---|
| 22:44 | 1.00″ | Osceola County, FL |
| 23:14 | 0.88″ | Seminole County, FL |
| 22:00 | 0.75″ | Santa Cruz County, AZ |
Damage, injuries and deaths
National Weather Service offices recorded about $82,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (16 events in 8 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Union County, PA | 1 | 0 | 0 | $40,000 |
| Pima County, AZ | 1 | 0 | 0 | $35,000 |
| York County, PA | 1 | 0 | 0 | $3,000 |
| Duval County, FL | 1 | 0 | 0 | $1,000 |
| Perry County, PA | 1 | 0 | 0 | $1,000 |
| Prince William County, VA | 1 | 0 | 0 | $1,000 |
| Marion County, FL | 1 | 0 | 0 | $1,000 |
| Mercer County, NJ | 1 | 0 | 0 | $1,000 |
What the National Weather Service wrote
- Union County, PA (near Dice) · Tornado EF1 · $40,000
“An EF1 tornado was confirmed by an NWS survey team just south of Mifflinburg in Union County. A large shed was destroyed and a roof was partially torn off of a barn. Peak winds were estimated at 90 mph, classifying this as an EF1.” - Pima County, AZ (near Naviska) · Thunderstorm wind 63 mph · $35,000
“Thunderstorm winds downed 20 power poles down along Marana Trico Road and Luckett Road. A chicken coop in Marana sustained some damage as well.” - York County, PA (near Strinestown) · Thunderstorm wind 58 mph · $3,000
“A thunderstorm producing winds near 60 mph knocked down trees and wires in Conewago Twp.” - Perry County, PA (near Millerstown) · Thunderstorm wind 58 mph · $1,000
“A thunderstorm producing winds near 60 mph knocked down limbs near Millerstown.” - Duval County, FL (near Jacksonville Hgts) · Thunderstorm wind 52 mph · $1,000
“Wilson Blvd was closed at Old Middleburg Road due to power lines down. The cost of damage was estimated.” - Prince William County, VA (near Canova) · Thunderstorm wind 49 mph · $1,000
“A tree was reported down on Sinclair Rd just west of Dumfries Rd as a result of outflow from a dying thunderstorm.”
Event narratives from NWS Storm Data, shortened. Up to six per day, chosen by deaths, injuries, damage and size.
Source: NOAA National Centers for Environmental Information (NCEI), Storm Events Database, as entered by National Weather Service offices; data through July 31, 2026. Damage is in dollars of the year, not adjusted for inflation.
NWS Tornado Damage Surveys for August 20, 2015
National Weather Service survey teams mapped 1 tornado path from this storm day (1 EF1), 0 miles in all. The map above draws each surveyed path as the NWS mapped it, colored by the EF rating of each stretch, in place of the straight start-to-end line.
| Rating | Peak wind | Path length | Max width | Deaths / injuries | On the ground | Surveyed by |
|---|---|---|---|---|---|---|
| EF1 | – | 0.2 mi | 75 yd | 0 / 0 | 18:05–18:15 UTC | NWS State College |
Source: NOAA National Weather Service Damage Assessment Toolkit (DAT): the tornado paths and EF-rating zones NWS survey teams mapped after each storm. Survey data are preliminary and can be revised; NOAA's official record is Storm Data (NCEI). Paths are simplified to about 30 m. Times are when the tornado was on the ground, in UTC.
Guides: What radar-estimated hail (MESH) is and isn't · Storm reports: preliminary vs final
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