Thunderstorms with heavy rainfall produced flooding across a broad swath of Lyman, Buffalo and Hand counties. In Lyman county, 7.46 inches was observed at a weather station 6 miles south southwest of Oacoma, while the South Dakota State University mesonet station near Oacoma…
Read the full account →Rapid melting of much above normal snowpack caused widespread, and at times, extensive flooding over portions of west and central Upper Michigan from the 12th into the 25th.
Read the full account →A strong mid-level trough and an associated frontal zone crossed through the|Mid-South and took aim on the OH Valley. Strong forcing associated the energy aloft coupled with a gradually destabilizing boundary layer out ahead it set the stage for areas of locally heavy showers…
Read the full account →A near-record snowfall season across Minnesota and Wisconsin led to a snowpack with snow-water-equivilent (SWE) values of 4 to 6 inches across much of the region by mid-March.
Read the full account →Thunderstorms developed during the evening of July 14th and continued into the early morning of July 15th, as they moved across all of northern and central Illinois. Nine tornadoes occurred, along with widespread wind damage.
Read the full account →A deep, negatively tilted upper level trough and associated occluded front passed from the central Mississippi River Valley on January 9th toward the lower New England region by the morning of the 10th.
Read the full account →A weak cold front slowly moved across northern NY and VT during the afternoon and evening hours of July 10th. Several rounds of tropical showers and thunderstorms traversed the area with a few storms pulsing to severe limits and localized excessive rainfall (4-5+ inches) in NE…
Read the full account →A moist and unstable air mass was in place from July 14 through July 15. This allowed for widespread, slow-moving storms to move across portions of central, southern, and southeastern Virginia. These storms produced heavy rain and widespread flash flooding in two rounds.
Read the full account →A nearby trough, coupled with a very moist airmass, led to the development of a line of showers and thunderstorms in New Mexico during the morning of the 13th.
Read the full account →A slow-moving low pressure system brought several rounds of showers and thunderstorms over multiple days through much of the region. Activity on the 25th was mostly concentrated across higher terrain areas of eastern AZ, fueled by MLCAPE values approaching 2000 J/kg.
Read the full account →A mesoscale convective system (MCS) dropped southward across Central NY from eastern Ontario, moving into an environment with plenty of moisture and instability during the early morning hours.
Read the full account →Heavy rain fell over portions of northern Iowa, especially northwestern Iowa and bordering states later on June 20 through early on June 21. This rainfall caused flash flooding in portions of northwest Iowa and also aided in saturating the soil.
Read the full account →Post Tropical Cyclone Ida brought heavy rain to eastern Pennsylvania on September 1. Rainfall totals were as high as 5 to 10 inches. The heavy rain caused significant flash flooding, mainly in the southeastern part of the state. It resulted in widespread property damage.
Read the full account →Post Tropical Cyclone Ida brought heavy rain to eastern Pennsylvania on September 1. Rainfall totals were as high as 5 to 10 inches. The heavy rain caused significant flash flooding, mainly in the southeastern part of the state. It resulted in widespread property damage.
Read the full account →Post Tropical Cyclone Ida brought heavy rain to eastern Pennsylvania on September 1. Rainfall totals were as high as 5 to 10 inches. The heavy rain caused significant flash flooding, mainly in the southeastern part of the state. It resulted in widespread property damage.
Read the full account →A mesoscale convective vortex moved across the Mid-South during the late afternoon and early evening on June 5, 2024. This feature interacted with a moist and unstable airmass to produce scattered thunderstorms across northeast Mississippi.
Read the full account →A deep plume of tropical moisture had spread over Central New York ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A broad area of low pressure across the Great Lakes region stalled out well to the west of the region early on Sunday, April 30th. A secondary area of low pressure developed and moved up the Eastern Seaboard and tracked across interior New England from Sunday, April 30th…
Read the full account →A near-record snowfall season across Minnesota and Wisconsin led to a snowpack with snow-water-equivilent (SWE) values of 4 to 6 inches across much of the region by mid-March.
Read the full account →Spring time mountain snow melt of heavy snow pack in the Canadian Rockies and the north Cascades brought major flooding to the Okanogan River from Oroville to it's mouth at the Columbia River.
Read the full account →A deepening area of consolidated low pressure tracked from the north shoreline of Lake Erie to Toronto, and then along the northern shoreline of Lake Ontario Thursday evening, October 31st.
Read the full account →A deepening area of consolidated low pressure tracked from the north shoreline of Lake Erie to Toronto, and then along the northern shoreline of Lake Ontario Thursday evening, October 31st.
Read the full account →A deepening area of consolidated low pressure tracked from the north shoreline of Lake Erie to Toronto, and then along the northern shoreline of Lake Ontario Thursday evening, October 31st.
Read the full account →An upper level cutoff low was located over central TN with precipitable water values around 2 inches with deep southerly flow. A warm front lifted through the area and stalled across the western Midlands of SC with elevated thunderstorms training along the front by evening.
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