A cold front dropped from north to south across the area. Unstable conditions were evident ahead of this, with about 2000 J/kg CAPE developing by late afternoon. Moderate mid-level shear was present with a shortwave just ahead of the front.
Read the full account →A slow-moving low pressure system drew in ample amounts of Gulf moisture on July 6th, allowing for very heavy rainfall to occur across portions of the Lower Rio Grande Valley.
Read the full account →An area of high pressure remained centered over the Four Corners while a slow-moving low pressure system tracked westward across southern New Mexico on July 22, 2021.
Read the full account →July 26, 2021 was yet another active monsoon day across northern and central New Mexico. With an area of high pressure over northern Colorado, moist southeasterly flow continued across much of New Mexico which resulted in another round of numerous afternoon thunderstorms.
Read the full account →A frontal boundary, coupled with an extremely warm and humid environment, produced another day of slow moving, torrential downpour producing thunderstorms over Northeast Pennsylvania. Stripes of 1 to 3 inch rainfall occurred over several parts of the area.
Read the full account →After moving across the Greater Antilles and weakening, the remnants of Tropical Storm Fred strengthened into a tropical storm once again in the Gulf of Mexico and made landfall near Cape San Blas with maximum sustained winds near 65 mph on August 16th.
Read the full account →Two rounds of thunderstorms impacted Southeastern Michigan on August 11: the first during the afternoon and the second during the late evening into the following morning.
Read the full account →Despite high pressure being in general control at the surface, a shortwave was moving into western KY during the morning hours, and would provide the energy needed, in an already very moist atmosphere, to trigger showers and thunderstorms throughout the day.
Read the full account →A backdoor cold front tracked south and west through New Mexico early on May 28, 2021, which reinforced low-level moisture across much of eastern and central portions of the state.
Read the full account →On Sept. 1, Tropical Depression Ida tracked northeasward from the central Appalachians and arrived in southern New England late in the day as a remnant low.
Read the full account →A slow moving area of upper level low pressure over the Mid-Mississippi Valley pumped semi-tropical weather into the western Carolinas for a couple of days, resulting in occasional rounds of moderate to heavy in the day leading up to the 7th.
Read the full account →The remnant low pressure center of Hurricane Ida passed across West Virginia and the Central Appalachian Mountains from late August 31st through September 1st.
Read the full account →A cold front moved southeastward from Lower Michigan to Lake Erie during the evening and overnight of the 15th and then stalled in vicinity of the southern lakeshore by daybreak.
Read the full account →A stationary boundary was situated from west to east across northern OH on July 12th, 2021, and would lift north to Lake Erie by late afternoon.
Read the full account →A surface low moved from northern Lake Huron to near Toronto during the late morning through early afternoon of the 29th. Simultaneously, the trailing cold front swept southeast from southern Lower MI to northwestern OH and central Lake Erie.
Read the full account →A broad ridge of high pressure was present over the eastern CONUS, with a warm, humid airmass in place over northern OH. PWAT values were near 1.9 and MLCAPE values ranged from 1000-2000 j/kg. Steering flow was minimal, which allowed for slow moving thunderstorms.
Read the full account →A number of rounds of thunderstorms were triggered by a westward moving upper level weather system across southeast Arizona from the afternoon of July 22 into the early morning of July 23.
Read the full account →Strong to severe thunderstorms developed in an unstable atmosphere in the afternoon of the 22nd. Storms initially developed over the high terrain of northern and eastern Arizona as well as near the Table Top mesa area south of Phoenix.
Read the full account →Upper-level troughing was noted over the northern Rockies via upper-air analysis the morning of the 30th. This disturbance slowly tracked east across the northern Plains.
Read the full account →Upper-level troughing was noted over the northern Rockies via upper-air analysis the morning of the 30th. This disturbance slowly tracked east across the northern Plains.
Read the full account →A frontal system over the area on August 18th and into the early morning hours of August 19th allowed for the development of multiple rounds of slow moving heavy thunderstorms which resulted in widespread significant to catastrophic flash flooding for portions of Southeast New…
Read the full account →A large area of stratiform rain spread across the southeast South Carolina in the predawn hours ahead of a warm front lifting northward. Immediately along the warm front, embedded thunderstorms developed and brought a period of strong wind gusts and intense rainfall to the…
Read the full account →An upper level trough passed across the central Appalachians during the afternoon and evening of May 18th, triggering widely scattered showers and thunderstorms to the north of a stationary front stretching across northern North Carolina.
Read the full account →An upper level trough passed across the central Appalachians during the afternoon and evening of May 18th, triggering widely scattered showers and thunderstorms to the north of a stationary front stretching across northern North Carolina.
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