Storm reports for July 20, 2017

On July 20, 2017, 27 hail, 165 damaging-wind and 4 tornado reports were logged across 19 states.

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27hail reports

165damaging-wind reports

4tornado reports

1.75″largest hail reported

IndependentNot affiliated with NOAA or the National Weather Service. Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology

← Jul 19, 2017 All 2017 storm days · July 2017 Jul 21, 2017 →

Other storms on July 20 →

On July 20, 2017, 27 hail, 165 damaging-wind and 4 tornado reports were logged across 19 states. The largest hail reported was 1.75″ (golf ball size) in Rio Blanco County, CO.

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
IA	5	27	0	1.25″
NY	0	28	4	–
PA	0	27	0	–
FL	3	22	0	1.00″
ND	9	12	0	1.75″
OH	0	12	0	–
SD	2	9	0	1.00″
NJ	0	7	0	–
SC	1	5	0	0.88″
ME	1	4	0	1.00″
WY	1	3	0	0.88″
NH	0	3	0	–
CO	2	0	0	1.75″
ID	2	0	0	1.00″
AZ	0	2	0	–
GA	0	2	0	–
MT	1	0	0	1.00″
UT	0	1	0	–
IL	0	1	0	–

Cities with hail reported within 5 miles

City	Population	Largest report
Dickinson, ND	25,695	1.75″
Deltona, FL	100,513	1.00″
DeBary, FL	23,468	1.00″
Orange City, FL	15,257	1.00″
Mount Pleasant, IA	8,509	1.00″
Belle Isle, FL	7,741	1.00″
Sidney, MT	6,031	1.00″
Edgewood, FL	2,867	1.00″
Bluffton, SC	36,146	0.88″
Davie, FL	112,052	0.75″
Plantation, FL	100,694	0.75″
Sunrise, FL	100,128	0.75″
Lauderhill, FL	76,627	0.75″
Tamarac, FL	75,147	0.75″
Lauderdale Lakes, FL	37,333	0.75″

Hail reports (27)

Time (UTC)	Size	Location
20:17	1.75″	Rio Blanco County, CO
22:42	1.75″	Stark County, ND
21:19	1.50″	McKenzie County, ND
21:24	1.25″	McKenzie County, ND
02:40	1.25″	Muscatine County, IA
20:20	1.00″	Richland County, MT
20:50	1.00″	Volusia County, FL
20:50	1.00″	McKenzie County, ND
20:54	1.00″	McKenzie County, ND
21:19	1.00″	Orange County, FL
21:30	1.00″	Slope County, ND
22:05	1.00″	Slope County, ND
22:26	1.00″	Stark County, ND
22:34	1.00″	Dunn County, ND
22:48	1.00″	Elbert County, CO
23:30	1.00″	Piscataquis County, ME
00:09	1.00″	Henry County, IA
00:30	1.00″	Guthrie County, IA
02:25	1.00″	Bear Lake County, ID
02:25	1.00″	Bear Lake County, ID
11:00	1.00″	Kingsbury County, SD
11:30	1.00″	Jerauld County, SD
18:56	0.88″	Beaufort County, SC
20:30	0.88″	Teton County, WY
00:20	0.88″	Guthrie County, IA
00:40	0.88″	Henry County, IA
20:23	0.75″	Broward County, FL

Damage, injuries and deaths

National Weather Service offices recorded about $2.1 million in property damage and 2 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (196 events in 19 states). Injuries and deaths are those the events caused directly.

County	Events	Injuries	Property damage
Middlesex County, NJ	1	2	–
Slope County, ND	4	0	$645,000
Allegany County, NY	8	0	$354,000
Bowman County, ND	3	0	$352,000
Dunn County, ND	1	0	$275,000
Erie County, NY	3	0	$119,000
Grant County, ND	1	0	$75,000
Steuben County, NY	8	0	$51,000
Maricopa County, AZ	1	0	$50,000
Tioga County, PA	5	0	$30,000
Cattaraugus County, NY	2	0	$27,000
Bradford County, PA	5	0	$27,000

What the National Weather Service wrote

Middlesex County, NJ (near Morgan) · Thunderstorm wind 49 mph · 2 injuries
“A tree was downed on US 35 near Lawrence parkway from thunderstorm winds. Nearby, a tent was blown over in New Brunswick which injured two people.”
Slope County, ND (near Amidon) · Thunderstorm wind 92 mph · $400,000
“A hopper style grain bin was destroyed at a ranch. Electrical poles in the area were snapped.”
Dunn County, ND (near Halliday) · Thunderstorm wind 92 mph · $275,000
“Multiple power poles were snapped in and around the community of Halliday.”
Allegany County, NY (near Angelica) · Tornado EF1 · $250,000
“A NWS storm survey confirmed an EF1 tornado touched down in Angelica.”
Bowman County, ND (near Rhame) · Thunderstorm wind 90 mph · $100,000
“A barn was destroyed with the debris completely removed from the original site.”
Erie County, NY (near South Wales) · Tornado EF0 · $100,000
“A NWS storm survey confirmed an EF1 tornado touched down in Holland.”

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 July 20, 2017

National Weather Service survey teams mapped 4 tornado paths from this storm day (1 EF2, 2 EF1, 1 EF0), 13 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
EF2	115 mph	6.2 mi	700 yd	0 / 0	16:30–16:40 UTC	NWS Buffalo
EF1	95 mph	4.4 mi	740 yd	0 / 0	17:45–17:52 UTC	NWS Buffalo
EF1	95 mph	1.2 mi	450 yd	0 / 0	16:55–16:56 UTC	NWS Buffalo
EF0	85 mph	1.1 mi	150 yd	0 / 0	17:29–17:30 UTC	NWS Buffalo

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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