NATIONAL STORM SUMMARY

JUNE 2020

1-6: Widespread but generally light precipitation fell in many parts of the country, maintaining mostly favorable growing conditions from the northern Plains into the Midwest and across much of the South.

Beneficial precipitation fell in the Northwest, with late-week showers and locally severe thunderstorms expanding across the northern Plains. Some of the week’s heaviest rain fell along and near the Gulf Coast, from southern Texas to Florida. Rain from
Louisiana to Florida was in part associated with the approach of Tropical Storm Cristobal, which after soaking parts of Central America and southeastern Mexico— and spending more than 2 days (June 3- 5) inland—moved northward across the Gulf of
Mexico. Cristobal’s final landfall occurred on June 7 near the mouth of the Mississippi River. Coming off the wettest May on record in Florida locations such as Miami (18.89 inches) and Marathon (15.66 inches), rain continued into early June. Miami
received 3.41 inches of rain from June 2-4. Key West, FL, collected a daily-record sum of 2.99 inches on June 3. Meanwhile, heavy showers also dotted southern Texas, where McAllen measured a daily-record amount (1.25 inches) on June 1. During the early-
to mid-week period, locally severe thunderstorms dotted the Plains, Midwest, and mid-Atlantic. On June 3, wind gusts in Pennsylvania were clocked to 82 mph in Reading and 68 mph in Philadelphia. On the same date, a thunderstorm-related gust to 79 mph was
recorded in York, NE. By June 4, thunderstorms from the mid-South to the mid-Atlantic produced daily-record totals in Baltimore, MD (2.18 inches), and Louisville, KY (2.14 inches). With a 2.91-inch total on the 4th, Parkersburg, WV, weathered its wettest
June day on record (previously, 2.87 inches on June 25, 1977). Late in the week, severe thunderstorms developed over the Intermountain West and returned across the northern Plains. In Colorado, peak winds gusts on June 5 were measured to 70 mph in Meeker
and 66 mph in Cortez. Thunderstorms also struck portions of the Four Corners States, igniting several wildfires and producing gusty winds but little rain. A wind gust to 68 mph was reported on June 6 in Springerville, AZ.

7-13: Tropical Storm Cristobal made landfall on the afternoon of June 7 near the mouth of the Mississippi River and moved generally northward, crossing the upper Great Lakes region on June 10. The band of rainfall directly associated with Cristobal was
relatively narrow, but the former tropical storm’s interaction with a cold front led to a broader area of precipitation across the northern Plains and upper Midwest. Most of the rainfall across the upper Midwest. Wet conditions also extended eastward
along the Gulf Coast, from Louisiana to Florida.
Winnemucca, NV, reported snowfall totaling 0.2 inch, a record for June 7. Precipitation also fell in the Northwest, where record-setting totals for June 7 included 1.13 inches in McCall, ID, and 1.18 inches in Fort Benton, MT. Meanwhile, Tropical Storm
Cristobal arrived along the central Gulf Coast, contributing to daily record amounts for June 7 in Mobile, AL (5.56 inches), and Pensacola, FL (2.78 inches). On June 8, Cristobal-related, daily-record totals topped the 2-inch mark at a broad array of
stations, including Monroe, LA (3.26 inches); Batesville, AR (3.11 inches); Jackson, MS (2.74 inches); and West Plains, MO (2.25 inches). As Cristobal passed through Arkansas on the 8th, a June barometric low-pressure record of 29.36 inches was set in
Pine Bluff (previously, 29.51 inches on June 14, 1998). Similarly, a June barometric record was broken early on the 10th in Green Bay, WI (29.12 inches; previously, 29.22 inches in 1917). On June 9, daily-record rainfall amounts reached 2.75 inches in
Columbia, MO, and 2.31 inches in Waterloo, IA. Elsewhere in Iowa, Fayette received 4.50 inches in a 24-hour period on June 9-10. Sault Sainte Marie, MI, notched a daily-record sum of 1.53 inches on June 10. Farther west, locally significant rainfall
continued from the Pacific Northwest to the northern Plains. Daily-record amounts for June 9 totaled 1.53 inches in Valentine, NE, and 0.80 inch in Olympia, WA. Several days later, on June 13, another round of Northwestern showers produced 1.21 inches in
Boise, ID, and 0.74 inch in Ontario, OR— both records for the date. Elsewhere, heavy showers developed in the southern Atlantic States, where daily-record amounts included 3.59 inches (on June 12) in Wilmington, NC, and 3.19 inches (on June 13) in
Naples, FL.

14-20: Rain was especially heavy (locally in excess of 4 inches) in parts of Virginia and North Carolina, while late-season snow blanketed higher elevations in the northern Rockies.

A non-tropical, low-pressure system moved inland across North Carolina, generating heavy showers across a multiday period. In Fayetteville, NC, more than half (3.46 inches) of the 6.62-inch weekly total fell on June 15. Elsewhere in North Carolina, Cape
Hatteras received 8.03 inches of rain from June 12-17, aided by a daily-record total of 3.49 inches on the 16th. In Virginia, Roanoke measured a daily-record rainfall (2.78 inches) on June 17. Meanwhile in southwestern Montana, approximately 17 inches of
snow blanketed the Darkhorse Lake observation site, at an elevation of 8,945 feet, on June 16-17. Since that site was established in 1977, the highest 2-day June snowfall had been 11 inches on June 18-19, 2013. Northwestern daily-record rainfall amounts
for June 17 reached 0.91 inch in Idaho Falls, ID, and 0.83 inch in Butte, MT. Late in the week, showers and thunderstorms across the nation’s mid-section resulted in daily-record totals in locations such as Lawton, OK (3.28 inches on June 19); Wausau,
WI (3.04 inches on June 20); and Amarillo, TX (1.74 inches on June 19). In the preceding 91 days (March 20 – June 18), precipitation in Amarillo had totaled just 1.05 inches.

21-27: Scattered to widespread showers in most areas from the Plains to the East Coast contrasted with mostly dry weather in the West. Midwestern showers were heaviest across the central and eastern Corn Belt, benefiting summer crops that had begun to
experience stress due to declining soil moisture. Showers also dotted the nation’s mid-section, but drought-affected rangeland, pastures, and rain-fed summer crops across the central and southern High Plains experienced only limited and localized
improvement due to uneven rainfall coverage, building heat, and high evaporation rates.

Locally heavy showers and thunderstorms lingered early in the week across the southern Plains, where Wichita Falls, TX, measured 4.13 inches from June 19-23. More than half (2.31 inches) of Wichita Falls’ rain occurred on June 21. Farther east,
rainfall was heaviest across the western and central Gulf Coast regions. Dallas-Fort Worth, TX, collected a record-setting sum (2.49 inches) for June 23. The following day, record-setting totals reached 3.34 inches in Baton Rouge, LA, and 2.29 inches in
Victoria, TX. Meanwhile, a slow-moving storm system delivered heavy rain in parts of the Great Lakes region. In Michigan, daily-record totals for June 23 included 2.28 inches in Sault Sainte Marie and 1.49 inches in Houghton Lake. Late in the week, a
cold front arriving in the Midwest produced locally heavy showers, mainly in the central and eastern Corn Belt. Chicago, IL, netted a daily-record sum (1.55 inches) for June 26. The next day, June 27 featured a record-setting total of 2.26 inches in
Evansville, IN. Elsewhere, thunderstorms resulted in local wind damage in various parts of the country.

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