Rockies and Plains Hail Storms

Losses, 2024 dollars

$1.3 billion

Losses at the time

$1.0 billion

Deaths

0

The losses and deaths are NCEI’s, counting everything the disaster did. The episodes below are only what the Weather Service filed in its Storm Events record, which counts damage differently and often not at all, so the two never add up and are shown apart.

• Hail in South Dakota, August 4, 20181 in hail · 1 eventA thunderstorm briefly became severe in the Sturgis area, producing hail to quarter size.
• Hail in North Dakota, August 4, 20181 in hail · 4 eventsIsolated severe thunderstorms formed on the evening of the 4th along a cold front. The longest duration storm tracked from just southeast of Devils Lake, through the McVille and Sharon areas, before dissipating over northwest Traill County.
• Hail and Damaging Winds in South Dakota, August 4, 20181 in hail · 3 eventsQuarter size hail and severe winds occurred in central South Dakota in the late evening hours.
• Hail and Damaging Winds in Iowa, August 4 to 6, 2018$117,000 · 1 in hail · 50 eventsMultiple waves of thunderstorms rolled through the state on the 5th and into the beginning of the 6th, providing the state with widespread rainfall and strong to severe thunderstorms.
• Tornado and Hail in South Dakota, August 4 to 5, 2018EF0 · 21 eventsAs an upper-level jet streak moved into southeast South Dakota during the late evening of August 4, a cluster of storms developed in south central South Dakota along and in advance of a surface trough axis where elevated instability was over 2000 J/kg.
• Tornado and Hail in Iowa, August 5, 2018EF0 · 11 eventsAs an upper-level jet streak moved into southeast South Dakota during the late evening of August 4, a cluster of storms developed in south central South Dakota along and in advance of a surface trough axis where elevated instability was over 2000 J/kg.
• Damaging Wind in Minnesota, August 5, 201855 kt wind · 1 eventAs an upper-level jet streak moved into southeast South Dakota during the late evening of August 4, a cluster of storms developed in south central South Dakota along and in advance of a surface trough axis where elevated instability was over 2000 J/kg.
• Damaging Winds in Wyoming, August 5, 201868 kt wind · 6 eventsThunderstorms produced very strong winds in Carbon and Laramie counties of southeast Wyoming.
• Flash Flood and Hail in Pennsylvania, August 5, 2018$3,000 · 1 in hail · 6 eventsIsolated thunderstorms managed to form in a hot and humid pattern. Weak steering flow led to some localized flash flooding in Allegheny County, and steep lapse rates/high instability combined with dry air aloft to produce hail and wind damage in a few instances.
• Flash Flood in West Virginia, August 5, 20181 eventIsolated thunderstorms managed to form in a hot and humid pattern. Weak steering flow led to some localized flash flooding in Marshall County.
• Damaging Wind in Virginia, August 5, 2018$5,000 · 55 kt wind · 1 eventOne severe thunderstorm developed during the afternoon and blew several trees down in Rockbridge County.
• Hail and Damaging Wind in Wisconsin, August 5, 20181 in hail · 4 eventsA few storms developed ahead of a cold front in a warm and moist airmass. One of the storms took on supercellular characteristics over northern Price County.
• Hail and Damaging Winds in Colorado, August 5, 20182.75 in hail · 7 eventsSevere thunderstorms developed in Logan County and produced large hail up to baseball size and wind gusts to 70 mph.
• Hail and Damaging Wind in Michigan, August 5, 2018$20,000 · 1 in hail · 4 eventsAn upper disturbance moving over a moist and unstable air mass produced isolated severe thunderstorms over west half portions of Upper Michigan during the evening of the 5th.
• Hail in Nebraska, August 5, 20181.75 in hail · 1 eventAn isolated supercell moved southeast across the panhandle and western Sandhills, producing up to golf ball size hail.
• Damaging Wind and Lightning Strike in Florida, August 5, 2018$70,000 · 2 eventsEasterly flow led to scattered thunderstorms developing over the Florida Peninsula and pushing into the eastern Gulf of Mexico, producing gusty winds. A lightning strike from one of these storms also caused a house fire.
• Hail and Damaging Winds in Iowa, August 5, 201870 kt wind · 4 eventsA complex of showers and thunderstorms moved across northeast Iowa ahead of a warm front on the evening of August 5th. Strong winds were reported with damage to trees in Independence, Monticello, and Dubuque.
• Hail in Wyoming, August 5, 20180.88 in hail · 1 eventA thunderstorm developed and became strong as headed south of the city of Casper. At the Bear Trap Music Festival on Casper Mountain, the Emergency Manager reported up to nickel size hail.
• Hail and Damaging Winds in Wisconsin, August 5, 20181 in hail · 4 eventsThunderstorms accompanied an upper level disturbance that moved across north-central Wisconsin during the afternoon and early evening of August 5th. The storms weakened a bit as they moved into the area but still managed to produce strong wind gusts and some quarter size hail.
• Damaging Winds in Kansas, August 5, 2018$17,000 · 78 kt wind · 3 eventsDuring the late afternoon on August 5th, 2018, a severe thunderstorm hit Quinter, KS leading to thunderstorm wind damage. Thunderstorm wind gust speeds were estimated at 90 MPH. An hour later, a line of severe thunderstorms moved east across northwest Kansas.
• Hail in Nebraska, August 5, 20181.25 in hail · 2 eventsA thunderstorm produced large hail in Cheyenne County.
• Damaging Winds and Lightning Strike in Illinois, August 5, 2018$10,000 · 60 kt wind · 6 eventsA complex of showers and thunderstorms moved from northeast Iowa into northwest Illinois ahead of a warm front on the evening of August 5th. Strong winds were reported with damage to trees in Elizabeth and Freeport.
• Hail and Damaging Winds in Mississippi, August 5 to 7, 2018$155,000 · 1 in hail · 8 eventsShowers and thunderstorms developed each afternoon and evening in a warm and humid air mass. Some of these storms produced damaging wind gusts and hail.
• Damaging Wind in Arizona, August 5, 201853 kt wind · 1 eventScattered thunderstorms affected areas east of Tucson during the afternoon and evening. The strongest storms moved northward near the Arizona/New Mexico border and produced a wind gust of 61 mph near San Simon.
• Damaging Wind in New Mexico, August 5, 201852 kt wind · 1 eventThe center of upper level high pressure focused over southern New Mexico on the 5th and allowed steering flow to become more northwesterly across the northern half of the state.
• Hail in South Dakota, August 5, 20181 in hail · 1 eventA left-moving supercell thunderstorm developed over southern Oglala Lakota County, producing large hail south of Oglala.
• Hail in Nebraska, August 5, 20181 in hail · 2 eventsA severe storm developed on August 5th.
• Damaging Wind in Kansas, August 5, 201859 kt wind · 1 eventOne isolated severe thunderstorm produced high wind in Hays.
• Damaging Winds in Michigan, August 6, 2018$25,000 · 52 kt wind · 2 eventsIsolated severe thunderstorm wind gusts brought down several trees and power lines across portions of Calhoun and Jackson counties.
• Damaging Winds in South Carolina, August 6, 2018$60,000 · 55 kt wind · 2 eventsDaytime heating and convergence along a surface trough contributed to scattered thunderstorm development, an isolated cell reached severe limits.
• Damaging Wind in Virginia, August 6, 2018$2,000 · 50 kt wind · 1 eventIsolated severe thunderstorm associated with a weak trough of low pressure produced damaging winds across portions of southeast Virginia.
• Hail and Damaging Winds in Alabama, August 6, 201861 kt wind · 12 eventsAfternoon thunderstorms produced isolated wind damage. The heaviest damage occurred in Decatur with one storm which knocked down several trees damaging homes.
• Hail and Damaging Winds in Arkansas, August 6, 2018$33,000 · 1 in hail · 3 eventsSurface instability allowed for unstable conditions to produce a few thunderstorms that reached severe limits across portions of northeast Arkansas during the afternoon of August 6th.
• Tornado and Damaging Winds in Michigan, August 6, 2018EF0 · 4 eventsA brief weak tornado developed near Croswell in Sanilac County, with trees reported down across far eastern Wayne County.
• Hail and Damaging Winds in New York, August 6, 2018$29,000 · 52 kt wind · 7 eventsA benign surface map featured a diffuse high pressure system across the mid-Atlantic states. Southwesterly flow ahead of a shortwave moving across southern Ontario advected moist and unstable air into the area.
• Flash Flooding and Damaging Winds in Arkansas, August 6 to 9, 201861 kt wind · 17 eventsMore to come later.
• Hail in Colorado, August 6, 20188 injured · $173 million · 4 in hail · 34 eventsAnother severe hail event(with hail up to the size of softballs or 4 inches in diameter) battered El Paso county and sections of northern Pueblo county during the afternoon hours of Monday, August 6th, 2018.
• Damaging Wind in North Carolina, August 6, 2018$10,000 · 50 kt wind · 1 eventScattered thunderstorms developed across the North Carolina foothills during the afternoon and moved southeast. One storm produced brief damaging winds in the Conover area.
• Hail in Wyoming, August 6, 20182 in hail · 12 eventsThunderstorms produced large hail in Laramie County.
• Hail and Damaging Winds in South Carolina, August 6, 20181 in hail · 5 eventsScattered thunderstorms developed across Upstate South Carolina during the afternoon and moved southeast. A few of the storms produced brief damaging winds in the foothills.
• Damaging Winds in North Carolina, August 6, 2018$4,000 · 50 kt wind · 4 eventsShowers and thunderstorms developed along a lee side surface trough across central North Carolina. The storms intensified as a weak mid level shortwave disturbance approached the area from the west in the late afternoon and early evening hours.
• Hail in Virginia, August 6, 20181 in hail · 1 eventOne severe thunderstorm developed over Floyd County and produced hail up to the size of quarters.
• Damaging Winds and Lightning Strike in South Carolina, August 6, 2018$69,000 · 50 kt wind · 13 eventsWarm and moist conditions between high pressure extending from the Atlantic and a Lee trough positioned inland led to thunderstorms developing upstream of the area before activity shifted over Southeast South Carolina during mid to late afternoon hours.
• Hail and Damaging Winds in Ohio, August 6, 20181 in hail · 8 eventsA MCV from overnight convection in Michigan as well as a upper level wave all caused favorable conditions for thunderstorms to develop. MLCAPE of 2000 to 3000 J/KG was observed with a 40 knot speed max passing through all resulting in pockets of damaging winds.
• Damaging Winds in Georgia, August 6 to 7, 2018$55,000 · 50 kt wind · 9 eventsDespite a persistent ridge of high pressure over the region, ample moisture and strong daytime heating resulted in isolated to scattered strong to severe thunderstorms each afternoon, into the early evening.
• Damaging Winds in Ohio, August 6 to 7, 2018$264,000 · 52 kt wind · 12 eventsA couple of strong thunderstorms developed in Northeast Ohio early in the evening of August 6th. A couple reports of damage were received in the Cleveland area. Late in the evening a line of thunderstorms developed in advance of an approaching cold front.
• Damaging Wind in Florida, August 6, 201850 kt wind · 1 eventScattered to numerous showers and thunderstorms occurred across the area. As is typical with summer storms in this part of the country, some of the storms were marginally severe with impacts to trees and power lines.
• Damaging Winds in New York, August 6, 2018$15,000 · 50 kt wind · 2 eventsScattered severe thunderstorms developed over central New York during the afternoon of the 6th. Warm humid air combined with an upper level disturbance to form the storms.
• Damaging Winds in Ohio, August 6, 2018$12,000 · 3 eventsIsolated strong thunderstorms developed ahead of weak upper level disturbance.
• Hail in Colorado, August 6, 20182.75 in hail · 13 eventsSevere thunderstorms rumbled across Adams, Arapahoe, Douglas, Elbert. Larimer, Lincoln, and Morgan counties. The storms produced large hail which ranged in size from quarter to baseball size.
• Damaging Wind in South Dakota, August 6, 201852 kt wind · 1 eventA thunderstorm briefly became severe over far eastern Custer County, producing strong wind gusts east of Fairburn.
• Damaging Wind in Georgia, August 6, 201850 kt wind · 1 eventHigh pressure north of the region brought a dominant east coast sea breeze regime to the area which triggered a few strong storms.
• Hail in Nebraska, August 6, 20183 in hail · 7 eventsThunderstorms produced very large hail across portions of the western Nebraska Panhandle.
• Damaging Winds in Michigan, August 6, 201855 kt wind · 2 eventsA MCV from overnight convection in Michigan as well as a upper level wave all caused favorable conditions for thunderstorms to develop. MLCAPE of 2000 to 3000 J/KG was observed with a 40 knot speed max passing through all resulting in pockets of damaging winds.
• Damaging Winds in Georgia, August 6, 2018$8,000 · 50 kt wind · 6 eventsScattered to numerous showers and thunderstorms occurred across the area. As is typical with summer storms in this part of the country, some of the storms were marginally severe with impacts to trees and power lines.
• Hail and Damaging Winds in South Dakota, August 6, 20181.75 in hail · 3 eventsA couple thunderstorms brought severe winds gusting up to near 80 mph and golf ball size hail to parts of central South Dakota.
• Hail and Damaging Winds in Nebraska, August 6, 20184.25 in hail · 17 eventsA long-lived supercell tracked from near Alliance to Imperial with several reports of baseball to softball size hail. Strong winds downed trees and crops.
• Hail in South Dakota, August 6, 20181 in hail · 1 eventA severe thunderstorm produced large hail over portions of southwestern Oglala Lakota County before moving south into Nebraska.
• Damaging Wind in Minnesota, August 6, 201852 kt wind · 1 eventA cluster of storms that developed across northeast South Dakota Monday afternoon, August 6th, moved east-southeast across western Minnesota. Most of the storms were not severe, but one storm that moved near Paynesville, Minnesota produced wind damage.
• Hail and Damaging Winds in Kansas, August 6, 20181.5 in hail · 5 eventsA few severe storms produced wind and hail reports late afternoon and evening of August 6 and 7th.
• Hail and Damaging Winds in Missouri, August 6, 20181.75 in hail · 14 eventsOn the evening of August 6 a cluster of severe thunderstorms moved into northwest Missouri, and caused some scattered wind damage. The predominant wind gusts from this complex were around 60 to 70 mph winds, along with some tree and power line damage.
• Tornado and Hail in Nebraska, August 6, 2018$31 million · EF1 · 15 eventsThis Monday evening got somewhat more active than anticipated, as a pair of supercell storms affected mainly the northeast quadrant of South Central Nebraska, resulting in several reports of large hail (up to 2 diameter), damaging winds (up to around 75 MPH), and even one EF-1…
• Damaging Wind in Iowa, August 6, 201852 kt wind · 1 eventA severe storm produced wind damage on August 6th.
• Tornado and Damaging Winds in Indiana, August 6, 2018EF1 · 6 eventsA MCV from overnight convection in Michigan as well as a upper level wave all caused favorable conditions for thunderstorms to develop. MLCAPE of 2000 to 3000 J/KG was observed with a 40 knot speed max passing through all resulting in pockets of damaging winds.
• Damaging Winds in Louisiana, August 6, 201856 kt wind · 2 eventsThe afternoon seabreeze spread north into Northcentral Louisiana from the Louisiana coast during the afternoon hours of August 6th, and interacted with a weak upper trough which lingered over the Lower Mississippi Valley.
• Damaging Wind in Florida, August 6, 201851 kt wind · 1 eventA severe thunderstorm produced a high wind gust near Eglin AFB.
• Damaging Wind in Vermont, August 6, 2018$5,000 · 55 kt wind · 1 eventA weak surface trough moved along the International border with Canada during the evening of August 6th. Most of the thunderstorms remained north of the border, but one storm just passed south of the border bringing some damaging winds that downed trees in Norton, VT.
• Hail and Damaging Winds in Illinois, August 6 to 7, 2018$81,000 · 1 in hail · 8 eventsSeveral waves of thunderstorms developed along a stationary frontal boundary draped across central Illinois from the evening of August 6th into the early morning of August 7th.
• Hail and Damaging Winds in South Dakota, August 6, 201856 kt wind · 3 eventsA mid-level trough sliding southeast across the Northern Plains generated numerous thunderstorms during the later afternoon and evening hours across central South Dakota.
• Damaging Winds in Missouri, August 6 to 7, 201856 kt wind · 8 eventsStrong to severe storms developed along an old outflow boundary over portions of central Missouri. Some of the storms produced damaging winds.
• Hail in Nebraska, August 6, 20181.5 in hail · 3 eventsA severe storm developed on August 6.
• Damaging Wind in Alabama, August 6, 2018$40,000 · 50 kt wind · 1 eventScattered to numerous showers and thunderstorms occurred across the area. As is typical with summer storms in this part of the country, some of the storms were marginally severe with impacts to trees and power lines.
• Damaging Winds in Indiana, August 6 to 7, 2018$12,000 · 61 kt wind · 4 eventsA line of scattered showers and thunderstorms moved southeast across the northern half of central Indiana during the late evening of August 6th and early morning of August the 7th. A few of the stronger storms produced damaging thunderstorm wind gusts.
• Damaging Wind in Kansas, August 6, 201874 kt wind · 1 eventFor the second day in a row an isolated severe thunderstorm producing high wind occurred in Ellis county.
• Damaging Wind and Lightning Strike in Indiana, August 7, 20182 injured · 50 kt wind · 2 eventsA stalled frontal boundary provided the focus for thunderstorm development with upper level support aiding in 30 to 40 knots of shear. Both supercells and bowing segments developed.
• Damaging Wind in New York, August 7, 2018$1,000 · 52 kt wind · 1 eventA pre-frontal trough moved across southern Ontario during the overnight and pre-dawn hours with weak forcing brushing areas close to the Canadian border.
• Damaging Winds in Maine, August 7, 201861 kt wind · 12 eventsA cold front crossed the region during the afternoon and evening of the 7th producing severe thunderstorms across central and Downeast portions of the region.
• Flash Flood and Flood in Missouri, August 7 to 11, 2018$127,000 · 1.75 in hail · 55 eventsSevere pulse storms occurred across the area on an afternoon basis from August 7-11. The most impactful afternoon/evening occurred on August 10 when severe pulse storms affected the Springfield metropolitan area.
• Tornado in Texas, August 7, 2018EF0 · 1 eventAn isolated thunderstorm along the shore of Sabine Lake produced a landspout that touched down in Port Arthur.
• Hail in Colorado, August 7, 20182 in hail · 16 eventsSevere thunderstorms produced hail the size of quarters near Colorado City, Boncarbo and Rosita, while hail the size of half dollars impacted portions of Colorado Springs.
• Damaging Wind in Pennsylvania, August 7, 2018$1,000 · 50 kt wind · 1 eventA crossing shortwave provided support in an unstable air mass to produce a line of thunderstorms across southern Pennsylvania during the afternoon. The strongest storm in Fayette County caused damage due to downburst winds.
• Tornado in Wisconsin, August 7, 2018EF0 · 1 eventA landspout tornado developed from a shower (the cell did not have thunder) southwest of Grantsburg, WI.
• Damaging Winds in Pennsylvania, August 7, 2018$29,000 · 52 kt wind · 7 eventsA broken line of storms developed across central Pennsylvania during the afternoon hours of August 7, 2018 in a high CAPE environment as a weak shortwave crossed New England. Several reports of wind damage were received, primarily across the middle and lower Susquehanna Valley.
• Flash Flooding and Hail in New York, August 7, 2018$1,000 · 1.5 in hail · 21 eventsScattered showers and thunderstorms developed within a humid, warm airmass across eastern New York. Some of these storms became severe, resulting in numerous trees and wires down along with hail.
• Damaging Winds in Pennsylvania, August 7, 2018$32,000 · 50 kt wind · 3 eventsA cold front crossed northeast Pennsylvania the afternoon of the 7th. This front triggered a few severe thunderstorms.
• Damaging Wind in Vermont, August 7, 2018$10,000 · 50 kt wind · 1 eventA cold front moved across the region in the morning hours of August 7th, with scattered showers and thunderstorms accompanied the front. One thunderstorm briefly pulsed up in intensity to deliver a brief wind gust that knocked down some trees.
• Damaging Wind in Indiana, August 7, 2018$1,000 · 52 kt wind · 1 eventAn upper trough moving east of the Mississippi combined with high surface dew points in place over the Ohio Valley to generate a few severe thunderstorms in southern Indiana and central Kentucky.
• Damaging Winds in Maine, August 7, 201850 kt wind · 7 eventsA very hot and humid air mass was in place over the region on the afternoon of August 7th with temperatures in the 90s and dew points in the lower 70s producing CAPE values up to 3000 J/KG.
• Flash Flood and Flooding in Illinois, August 7, 2018$100,000 · 10 eventsHeavy rain produced flash flooding across portions of northern Illinois during the afternoon of August 7th.
• Flash Flood and Damaging Wind in West Virginia, August 7, 2018$11,000 · 2 eventsA cold front in conjunction with an upper-level shortwave trough kicked off showers and thunderstorms on the 7th. One of these storms produced heavy rainfall and flash flooding in Braxton County. Another storm caused minor wind damage in Putnam County.
• Damaging Winds in District of Columbia, August 7, 201850 kt wind · 4 eventsAn upper level low near the region combined with high instability and increasing winds aloft to produce thunderstorms, some of which became severe.
• Tornado in Louisiana, August 7, 2018EF0 · 1 eventAfternoon thunderstorms in South Louisiana produced a landspout near Lake Arthur.
• Damaging Winds and Lightning Strikes in Maryland, August 7, 20187 injured · 50 kt wind · 8 eventsAn upper level low near the region combined with high instability and increasing winds aloft to produce thunderstorms, some of which became severe.
• Damaging Winds in Virginia, August 7, 2018$12,000 · 50 kt wind · 5 eventsScattered severe thunderstorms developed during the afternoon from a hot and humid air mass. These storms blew down several trees and a telephone line.
• Damaging Wind in Iowa, August 7, 201855 kt wind · 2 eventsA broad upper level trough was situated over the upper Midwest, with accompanying shortwaves moving through the flow. No major/discernible surface system was present, though weak boundaries were in the area.
• Damaging Winds in New Hampshire, August 7, 20181 injured · 55 kt wind · 6 eventsA very hot and humid air mass was in place over the region on the afternoon of August 7th with temperatures in the 90s and dew points in the lower 70s producing CAPE values up to 3000 J/KG.
• Damaging Winds in North Carolina, August 7, 2018$12,000 · 55 kt wind · 5 eventsScattered severe thunderstorms developed in the afternoon from a hot and humid air mass. These storms blew several trees down in the North Carolina Piedmont.
• Flash Flooding and Damaging Winds in Oklahoma, August 7, 2018$26,000 · 61 kt wind · 15 eventsStrong to severe thunderstorms developed during the afternoon of the 7th along a stationary frontal boundary that extended across northeastern and central Oklahoma. These storms moved southeast across northeastern Oklahoma during the afternoon and early evening hours.
• Damaging Wind in Oklahoma, August 7, 201856 kt wind · 1 eventStorms formed along a stationary front on the afternoon of the 7th and moved southward, producing a severe wind gust along the way.
• Damaging Winds in Alabama, August 7, 2018$500 · 52 kt wind · 2 eventsAfternoon thunderstorms produced isolated wind damage.
• Damaging Winds and Lightning Strike in Massachusetts, August 7, 2018$1,000 · 50 kt wind · 5 eventsScattered showers and thunderstorms developed within a humid, warm airmass across western Massachusetts. Some of these storms became severe, resulting in numerous trees and wires down.
• Damaging Wind in Ohio, August 7, 2018$1,000 · 1 eventIsolated strong thunderstorms developed in association with a weak upper level disturbance.
• Hail and Damaging Wind in South Carolina, August 7, 2018$20,000 · 50 kt wind · 2 eventsIsolated thunderstorms developed near the Blue Ridge escarpment during the afternoon and moved southeast. One storm produced brief hail and damaging winds in Oconee County.
• Damaging Wind in Florida, August 7, 2018$5,000 · 1 eventScattered afternoon thunderstorms developing along the sea breeze produced brief gusty winds near the Charlotte Harbor.
• Damaging Wind in Virginia, August 7, 201850 kt wind · 1 eventAn upper level low near the region combined with high instability and increasing winds aloft to produce thunderstorms, some of which became severe.
• Flash Flooding in Pennsylvania, August 7 to 8, 2018$613,000 · 6 eventsA cold front moved across New York and became stationary over northeast Pennsylvania during the late afternoon. Torrential rain producing thunderstorms formed within the tropical-like environment and moved slowly over the same areas.
• Damaging Wind in Alabama, August 7, 201850 kt wind · 1 eventIsolated strong to severe thunderstorms developed over north Alabama during the afternoon hours. Surface based CAPE values reached near 4000 J/kg across this area, and a severe storm developed over Jefferson County which produced wind damage.
• Flash Flood and Hail in Wyoming, August 7, 20182.5 in hail · 10 eventsThunderstorms produced very large hail, strong winds, and torrential rainfall across portions of southeast Wyoming.
• Hail in Colorado, August 7, 20181.75 in hail · 8 eventsSevere thunderstorms brought another round of large hail across Arapahoe, Douglas, Larimer, and Weld counties. The hail ranged in size from quarter to golf ball size.
• Damaging Wind and Lightning Strikes in New York, August 7, 20183 injured · $8,000 · 52 kt wind · 4 eventsA hot and humid airmass with a weak surface trough, in association with an upper level trough triggered thunderstorms across the region.
• Damaging Winds in Arkansas, August 7, 2018$8,000 · 61 kt wind · 2 eventsStrong to severe thunderstorms developed during the afternoon of the 7th along a stationary frontal boundary that extended across northeastern and central Oklahoma. These storms moved southeast into portions of northwestern Arkansas during the early evening hours.
• Flash Flooding in Maryland, August 7, 20183 eventsA weak boundary triggered some showers and thunderstorms. Locally heavy rain caused a few incidents of flooding.
• Damaging Winds in New Jersey, August 7, 2018$4,000 · 52 kt wind · 2 eventsA hot and humid airmass with a weak surface trough, in association with an upper level trough triggered thunderstorms across the region.
• Damaging Winds in North Carolina, August 7, 2018$16,000 · 50 kt wind · 12 eventsThunderstorms developed along a lee trough axis and were further enhanced by a sea breeze moving inland. Some of these storms became strong to severe producing wind damage.
• Flash Flooding in New York, August 7, 20182 eventsA surface trough developing in a hot and humid airmass ahead of an approaching cold front resulted in the development of widely scattered showers and thunderstorms on the afternoon of August 7th.
• Hail and Damaging Winds in Nebraska, August 7 to 8, 20181.75 in hail · 5 eventsA group of supercells moved through the Sandhills late the night of Aug. 7 and into the early morning hours of Aug. 8, creating winds up to 60 mph and golf ball size hail.
• Hail and Damaging Winds in New Mexico, August 7 to 8, 2018$5,000 · 2.25 in hail · 9 eventsThe center of upper level high pressure drifted westward into Arizona on the 7th and allowed stronger northwest flow to develop aloft over northeastern New Mexico.
• Flash Flood in Pennsylvania, August 7, 20181 eventSlow moving thunderstorms produced flash flooding in Sullivan County.
• Hail in Colorado, August 7, 20182 in hail · 6 eventsDuring the evening scattered thunderstorms developed across East Central Colorado, moving east or south. The largest hail size reported was hen egg at two different locations from the same thunderstorm in northwest Kit Carson County.
• Flash Flood and Damaging Wind in Arizona, August 7, 2018$1,000 · 52 kt wind · 2 eventsNumerous thunderstorms formed and moved westward across southeast Arizona. The strongest storms caused flooding and wind damage near Sahuarita.
• Flash Flood and Heavy Rain in Arizona, August 7, 2018$5,000 · 2 eventsThunderstorms with locally heavy rain developed across the higher terrain of southern Gila County during the evening hours on August 7th.
• Flash Flood in New Jersey, August 7, 20181 eventRainfall totals of 2 to 4 inches fell in northeastern Monmouth County in a short amount of time on the evening of August 7, 2018.
• Flash Flooding in Connecticut, August 7, 20183 eventsA cold front moved into New England the evening of August 7th and stalled just north of Massachusetts. The airmass over the state was very humid and unstable. This generated strong thunderstorms and downpours over Connecticut.
• Damaging Wind in North Carolina, August 7, 201850 kt wind · 1 eventAn isolated thunderstorm developed over the Charlotte area during the evening and moved southeast, producing brief wind damage in southeast Mecklenburg County.
• Lightning Strike in Arizona, August 7, 2018$150,000 · 1 eventMonsoon thunderstorms developed during the evening hours on August 7th, and a few of the stronger storms produced very dangerous cloud to ground lightning.
• Flash Flooding and Flooding in Oklahoma, August 8, 2018$40,000 · 61 kt wind · 10 eventsA mass of training storms formed overnight into the morning of the 8th over northern Oklahoma and moved southward. These storms produced flash flooding especially across central Oklahoma. A few severe reports were noted as well.
• Damaging Wind in Kentucky, August 8, 2018$5,000 · 52 kt wind · 1 eventThunderstorms along the leading edge of a fairly disorganized mesoscale convective system produced gusty winds and isolated tree damage. The storms occurred well ahead of a cold front that extended from the Great Lakes to the southern Plains.
• Hail in Nebraska, August 8, 20182.5 in hail · 4 eventsA thunderstorm produced large hail in western Kimball County.
• Hail and Lightning Strike in Nebraska, August 8, 2018$50,000 · 0.75 in hail · 2 eventsAlthough this Wednesday morning technically featured no severe-criteria hail/wind reports, a southward-drifting cluster of strong storms still managed to create a bit of commotion. Most notably, around 7:45 a.m.
• Tornado and Hail in Colorado, August 8, 2018EF0 · 3 eventsA severe thunderstorm produced hail from nickel to half dollar size. In short-lived tornado also touched down but no damage was observed.
• Damaging Winds and Heavy Rain in New York, August 8, 2018$2,000 · 52 kt wind · 3 eventsThe region was in a moist southwest flow with a weak ridge across the southeastern states and an shortwave digging into eastern Michigan. The 12z BUF sounding had a precipitable water value of 1.78 inches but very limited wind shear with 15 kts at 850mb and 20 kts at 700 mb.
• Damaging Winds and Lightning Strike in Tennessee, August 8, 2018$145,000 · 52 kt wind · 13 eventsA small mesoscale convective system (MCS) moved eastward across Middle Tennessee during the late morning and early afternoon hours on August 8, producing several reports of wind damage.
• Hail in Colorado, August 8, 20181.25 in hail · 1 eventA severe thunderstorm generated half dollar sized hail near Calhan during the morning of the 8th.
• Damaging Winds and Lightning Strike in North Carolina, August 8, 2018$54,000 · 60 kt wind · 14 eventsA hot and humid air mass sparked numerous severe thunderstorms during the afternoon. These storms downed a copious amount of trees and power lines across the North Carolina Piedmont. Surry County suffered the most notable damage.
• Hail in Kansas, August 8, 20180.75 in hail · 1 eventOne report of hail just a little under severe criteria was observed during the early afternoon.
• Damaging Wind in Georgia, August 8, 201850 kt wind · 1 eventIsolated to widely scattered thunderstorms developed across the Georgia Blue Ridge during the afternoon. One storm produced brief damaging winds near Tallulah Gorge.
• Damaging Winds in Virginia, August 8, 2018$70,000 · 60 kt wind · 9 eventsA hot and humid air mass sparked scattered severe thunderstorms during the afternoon. These storms blew down multiple trees and power lines in southwest Virginia. Two homes suffered damage in the city of Danville due to a tree falling on each of them.
• Flash Flood and Damaging Winds in Kentucky, August 8, 201852 kt wind · 5 eventsNumerous thunderstorms developed during the early to mid afternoon hours ahead of a weak cool front approaching eastern Kentucky. A few of these storms briefly reached severe limits, resulting in damaging wind gusts across portions of south central to southeast Kentucky.
• Damaging Winds in Indiana, August 8, 201860 kt wind · 2 eventsStalled frontal boundary remained the focus for thunderstorms into the 8th with marginal shear profiles and sufficient instability allowing for a few strong to severe storms.
• Damaging Winds in Tennessee, August 8, 201850 kt wind · 10 eventsConvection developed along an outflow boundary during the afternoon across Tennessee and Southwest North Carolina generating damaging winds.
• Flash Flood and Hail in Georgia, August 8 to 9, 2018$168,000 · 1 in hail · 29 eventsA series of weak short waves moving through a generally zonal upper-level pattern, combined with strong daytime heating each day to produce scattered strong to severe thunderstorms across north and central Georgia.
• Damaging Winds in Florida, August 8, 2018$16,000 · 50 kt wind · 4 eventsSea breeze storms and boundary mergers produced scattered severe storms over an unstable airmass.
• Hail and Damaging Winds in South Carolina, August 8, 2018$5,000 · 1.25 in hail · 5 eventsScattered thunderstorms developed during the afternoon near the South Carolina Blue Ridge, with storms gradually spreading south and east along outflow boundaries throughout the afternoon and into the evening. A few of the storms produced brief damaging winds.
• Flash Flooding and Hail in New Mexico, August 8, 2018$55,000 · 2 in hail · 6 eventsNorthwest flow aloft over eastern New Mexico combined with abundant moisture and strong instability to generate a second day of scattered to numerous showers and thunderstorms.
• Hail and Damaging Winds in North Carolina, August 8, 2018$20,000 · 1.5 in hail · 16 eventsScattered thunderstorms developed across the North Carolina Blue Ridge during the afternoon, with storms developing gradually along outflows into the Piedmont throughout the afternoon and into the evening. A few of the storms produced brief damaging winds.
• Damaging Winds in Ohio, August 8, 201855 kt wind · 2 eventsStalled frontal boundary remained the focus for thunderstorms into the 8th with marginal shear profiles and sufficient instability allowing for a few strong to severe storms.
• Damaging Wind in Massachusetts, August 8, 201850 kt wind · 1 eventScattered thunderstorms developed during the afternoon and evening of August 8th. One of these storms resulted in downed power lines.
• Flash Flood in Colorado, August 8, 20181 eventThunderstorm development created heavy precipitation over the Dog Springs Arroyo, South Oak Creek, Chavez Arroyo, and Yellowstone Creek. The Huerfano County Emergency Manager provided a delayed report of evidence for flash flooding over County Road 531 near South Oak Creek.
• Damaging Winds in Georgia, August 8, 2018$1,000 · 50 kt wind · 5 eventsScattered to numerous showers and thunderstorms occurred across the area. As is typical with summer storms in this part of the country, some of the storms were marginally severe with impacts to trees and power lines.
• Damaging Winds in North Carolina, August 8, 2018$378,000 · 50 kt wind · 32 eventsA remnant MCV helped to initiate a broken band of thunderstorms that moved east across central North Carolina during the afternoon and late evening hours.
• Damaging Winds in Virginia, August 8, 201850 kt wind · 11 eventsAn upper level low near the region combined with high instability and increasing winds aloft to produce thunderstorms, some of which became severe.
• Hail and Damaging Winds in South Carolina, August 8, 2018$500 · 60 kt wind · 6 eventsAn upper level disturbance and surface trough contributed to a band of scattered thunderstorms developing and moving through the region in the evening, some of which reached severe limits.
• Damaging Winds in Alabama, August 8, 2018$100 · 52 kt wind · 2 eventsThunderstorms produced isolated wind damage during the afternoon into the early evening hours. A measured wind gust of 49 mph occurred as early as 1230 pm CDT at the Huntsville International Airport.
• Damaging Winds and Lightning Strike in Connecticut, August 8, 2018$9,000 · 52 kt wind · 3 eventsA surface trough in a very warm and humid airmass triggered thunderstorms across the region.
• Damaging Winds in Virginia, August 8, 2018$4,000 · 52 kt wind · 2 eventsScattered severe thunderstorms along a trough of low pressure produced damaging winds across portions of central and south central Virginia.
• Hail in Minnesota, August 8, 20182.5 in hail · 7 eventsStorms developed ahead of a cold front that moved across the region.
• Damaging Winds in Georgia, August 8, 201850 kt wind · 4 eventsSea breeze storms and boundary mergers produced scattered severe storms over an unstable airmass.
• Flash Flooding in New Hampshire, August 8, 20182 eventsAn area of thunderstorms produced 2 to 4 inches of rain in less than 2 hours in portions of southern New Hampshire. This caused flooding on several streets in Concord including Hall Street, Old Suncook Road and Manchester Street where cars were flooded up to the roofs.
• Flash Flooding and Flood in New York, August 8, 2018$430,000 · 5 eventsPersistent tropical-like moisture remained across the northeastern United States. An upper level disturbance moved through the region, triggering heavy rain producing thunderstorms during the late afternoon and evening hours.
• Damaging Winds in Wisconsin, August 8, 201850 kt wind · 2 eventsStorms developed ahead of a cold front moving across the region. A few of the stronger storms produced hail and damaging wind gusts.

Every billion-dollar disasterEvery storm of 2018Tornadoes in 2018

NOAA NCEI, U.S. Billion-Dollar Weather and Climate Disasters (2025), https://doi.org/10.25921/stkw-7w73, and the Storm Events Database for the episodes.