A slow release of a snow pack, containing one to over two inches of water, occurred in the days leading to the event which started the process of river rises in many areas.
Read the full account →A ridge of high pressure over eastern North America stalled Florence's forward motion a few miles off the southeast North Carolina coast on September 13th.
Read the full account →A series of weather systems brought impactful winter weather to the area with light snow developing across north central Montana, becoming more widespread across the region. Dangerously cold wind chills persisted along the Hi-Line.
Read the full account →Monetary losses do not include insured losses. Fatalities are preliminary until the Florida Medical Examiner releases the official information. This document will be updated once released.
Read the full account →After moisture from Tropical Storm Norbert impacted Utah earlier in the month, more moisture associated with Tropical Storm Odile moved into Utah on September 26 and 27, causing widespread flooding in central and southern Utah, as well as strong gusty thunderstorms in northern…
Read the full account →The moisture and remnants of Tropical Storm Fred moved across parts of the mid-Atlantic and northeast United States between August 18 to 20. As this feature moved over the central parts of New York and northeast Pennsylvania it produced locally heavy rainfall and severe flash…
Read the full account →A ridge of high pressure over eastern North America stalled Florence's forward motion a few miles off the southeast North Carolina coast on September 13th.
Read the full account →Thunderstorms developed near and ahead of a surface low over southeast Montana, and moved into North Dakota where strong deep layer shear and instability were noted. Some of the storms became severe, with strong wind gusts as the main threat.
Read the full account →Multiple rounds of thunderstorms, first from a decaying morning mesoscale convective system and later forming on outflow from earlier activity, produced heavy rainfall on July 1st.
Read the full account →A frontal boundary swung into the Central Appalachians on July 12th and interrupted quiet weather provided by high pressure the day prior. Initially, showers and storms evolved along the front across Ohio and then spread eastward into West Virginia that afternoon and evening.
Read the full account →A strong short-wave trough moved into the Northern Plains as a slow moving warm front lifted through North Dakota. Very strong instability developed by afternoon, along with increased deep layer shear. The initial storms occurred over west-central and northwest North Dakota.
Read the full account →On the 4th, deep moisture was in place with near record level PWAT values of 1.8-2.0 inches observed by regional soundings. Instability was marginal with MLCAPE around 1000 J/kg, but it was sufficient for thunderstorms to develop across Gila county in the afternoon.
Read the full account →Torrential rain from an atmospheric river with locally heavy convective showers brought flash flooding to portions of the northern Sierra and Motherlode foothills.
Read the full account →An above average snow pack in the mountains drained by the Pend Oreille and Clark Fork River basins melted at an accelerated rate during the month of May.
Read the full account →The final round of rain in a stretch of 4 days brought rain amounts of 2-4.5 inches of rain to central Indiana in addition to the 3-5 inches that had fallen.
Read the full account →Although Isaac was a hurricane in the Gulf of Mexico, it had weakened to a tropical depression by the time it reached Arkansas. Isaac passed through western Arkansas on the evening of the 30th and during the day on the 31st.
Read the full account →Anomalously deep moisture was present across southeast Utah and southwest Colorado on the afternoon of June 4th. Enough sunshine had gotten through during the morning hours to create afternoon instability of 500-1000 J/Kg, more than enough to produce some strong storms.
Read the full account →An upper disturbance moving through a warm, moist and unstable environment set the stage for the development of isolated severe thunderstorms, heavy rainfall and flooding over portions of west and central Upper Michigan during the afternoon and evening of the 12th.
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 →On Sunday evening June 2 and into Monday June 3, a round of strong storms developed across eastern SD and southwestern MN along a stationary boundary. These storms produced a brief tornado in Renville County, wind damage in Morrison County, and small hail in Stevens County.
Read the full account →A ridge of high pressure over eastern North America stalled Florence's forward motion a few miles off the southeast North Carolina coast on September 13th.
Read the full account →A weak frontal system moving through a warm and excessively moist environment triggered thunderstorms with torrential rainfall. These storms were slow moving and produced copious amounts of rain which led to localized flash flooding of roads, small streams and a few residences…
Read the full account →Training heavy rainfall developed in portions of Southern Illinois during the evening hours on the 28th, with flash flooding developing in Wayne and Saline Counties. Eldorado was hit hard for a second time with rainfall totals around 5 inches, prompting water rescues.
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