4th-10th…Wet weather continued to fall across the West on Monday as a strong cold front trekked through the western third of the nation. Moisture from the Pacific and energy associated with this front continued to spark rain showers, periodic heavy rainfall, snow, and a few rumbles of thunder from the Pacific Northwest through southern California. Rain showers changed into snow as the front lifted across the colder terrain of the inland mountains of California and the Northern Intermountain West. Additional precipitation spread across the Great Basin and was accompanied by gusty winds. This wintry weather combo created hazardous travel conditions with slick roads and lowered visibilities. Winter Storm Warnings and Advisories remained in effect for most of the Intermountain West, while the Central Great Basin and the Southwest remained under Wind Advisories and High Wind Watches. To the east, another patch of active weather developed across the nation's mid-section as a warm front stretched across the Central Plains into the Mid-Mississippi Valley. Moisture from the Gulf of Mexico spread northward and interacted with this front to produce scattered rain showers and thunderstorms across areas of the Midwest. The strongest concentration of stormy weather occurred from northeastern Kansas to southern Iowa and across the central region of western Illinois. Areas of northeastern Kansas, southeastern Nebraska, northwestern Missouri, and southern Iowa experienced severe thunderstorm activity through the afternoon with damaging winds and quarter to golf ball sized hail (1.00 to 1.75 inches). Meanwhile, the leading edge of the aforementioned frontal boundary extended through the Ohio Valley into Lower Great Lakes and triggered areas of light rain showers across the southern Ohio Valley and the Northeast. Elsewhere, high pressure produced fair weather activity with warm temperatures from the Southern Plains through the Southeast and across the Mid-Atlantic.
Friday was a transition day throughout the country as only one major active weather system was noticed. This feature was a cold front that raced through the eastern seaboard in the morning and out into the Atlantic Ocean. This front contained a significant amount of moisture that produced areas of heavy rain and thunderstorms along the eastern seaboard. The associated thunderstorms were severe in nature but did produced areas of very heavy rain in the early morning in the Carolinas.
By the afternoon, the associated rain was contained to northern New England as the southern edge of the cold front had moved into the Atlantic Ocean. This precipitation represented the only notable precipitation throughout the country by the afternoon. A high pressure system along the Gulf Coast stretched northward and provided dry conditions from Texas through the Upper Midwest and Plains. A weak cold front continued moving through the Rockies, but was lacking any moisture needed to produce precipitation. The West remained dry and mild.
The Northeast rose into the 40s and 50s, while the Southeast saw temperatures in the 60s and 70s. The Upper Midwest rose into the 40s and 50s, while the Northern Plains saw temperatures in the 50s and 60s. The Northwest rose into the 40s and 50s.
11th-17th…The West Coast had wet weather on Monday, as another Pacific storm pushed ample moisture onshore. A strong low pressure system created a cold front which kicked up periods of heavy rain over northern California and the Pacific Northwest. As the front pasted, the low pressure system moved onshore and triggered widespread scattered showers over most of the West Coast, with light snow at higher elevations of the Sierra Nevadas and the Cascades. Snowfall totals ranged between 1-3 inches, while most lower elevations saw between a quarter and a half of an inch of rain. San Francisco, California reported 0.53 inches of rain, while Los Angeles, California reported 0.66 inches. Meanwhile in the Plains, the system in the West created a warm front that stretched over the Dakotas and into the Upper Midwest. This triggered scattered showers and thunderstorms, some of which turned severe. Quarter size hail was reported in Frederick, South Dakota, but hail in Artas, South Dakota started as pea size and increased t golf ball size. Strong winds were also associated with this system. Bismark, North Dakota reported 31 mph sustained winds with gusts up to 37 mph. Just to the east in the Upper Midwest, heavy rain and thunderstorms developed Monday morning. In Harris, Iowa, 0.32 inches of rain was reported with strong wind gusts up to 30 mph. Hail was reported in Quimby, Iowa. In the South, a minor low pressure system developed over northern Mexico and spun over the Texas and Mexico border. Flow around this system picked up moisture from the Gulf of Mexico, and spread moderate to heavy showers and thunderstorms onshore. Severe weather has not yet been reported, but 0.65 inches of rain fell over Sarita, Texas. Further east, a ridge of high pressure hovered over the East Coast and brought another sunny and mild weather day. However, these clear skies overnight allowed for overnight lows to dip to near-freezing in the Northeast. Daytime highs remained in the 50s and 60s in the North, while the Southeast reached into the 80s. Dry conditions in the South allowed for fire threats to increase over Georgia, Alabama, and Florida.
Drier weather activity returned to most of the Northwest and the Northern Plains on Wednesday as a low pressure system formerly over the Northern High Plains lifted into southern Saskatchewan, Canada. Lingering moisture and energy from this system continued to spark a few patches of light rain and snow showers in portions of Montana through the afternoon. Strong southwesterly winds associated with the system ushered dryer and milder air into the Northern Plains. Low relative humidity levels and windy conditions raised grassland fire danger concerns across the Dakotas. Meanwhile, a frontal boundary associated with the aforementioned storm became stretched across the Upper Mississippi Valley and extended through the Central Plains into eastern New Mexico by the afternoon. Moisture from the Gulf of Mexico interacted with energy along this front to produce areas of scattered rain showers just east of the boundary, primarily across Minnesota. The most unsettling weather activity developed across western Texas with scattered rainfall and isolated thunderstorms. Persistent rainfall and periods of heavy rainfall across southwestern Texas created increased risks of local flooding. To the East, clearer skies and mild to warm temperatures remained over most of the eastern half of the nation on Wednesday due to a dominant high pressure system. A combination of warm and dry conditions with breezy winds raise fire danger concerns across northern Alabama and western Florida. Near the coast, onshore flow associated with the system triggered increased cloud coverage and cooler temperatures across portions of North Carolina and Virginia. Finally, out West, cloudy skies with embedded showers moved into the northern tier of California as an offshore wave of low pressure prepared to lift into Oregon. The rest of the West experienced fairer weather activity with slightly milder temperatures than yesterday.
The main weather producer in the country on Friday was a long cold front that initially stretched from the Central Plains through the Upper Midwest before gradually moving east and southeastward. The tail end of the front provided heavy rain to northern Texas and Oklahoma. The precipitation along the northern edge of the front was more scattered in nature as deep moisture produced thunderstorms in the Ohio Valley and into New England. Some of these thunderstorms were possibly severe in nature as there were some reports of wind damage in eastern Ohio and western Pennsylvania. In the afternoon, rain moved into the colder air over New England. A high pressure system sank southward into the Northern Plains and kept conditions dry in the Northern Rockies and Northern Plains. The West remained dry as well in advance of a major pattern change that will move into the area late in the weekend. The warmest weather was in the Southeast as the region warmed into the 80s and 90s. The Northwest saw a range of temperatures from the 40s to the 70s, while the Northern Plains saw temperatures in the 50s and 60s. The Northwest rose into the 60s and 70s.
18th-24th…The East Coast saw a end to wet weather on Monday, but the Southern and Northwest saw scattered showers. A large low pressure system that hovered over the Northeastern US finally shoved offshore and into the Atlantic Ocean early on Monday. This allowed for diminishing showers over New England, while a few scattered showers persisted in the extreme Northeast. In South Lagrange, Maine, only 0.03 inches of rain have been reported. To the south, a small trough of low pressure moved eastward from Texas into the Lower Mississippi River Valley. Flow around this system picked up moisture from the Gulf of Mexico, and brought warm and humid air onshore. These conditions kicked up scattered showers and thunderstorms, none of which have turned severe. A front extended eastward from this system and stretched over Florida, which allowed for cloudy skies with a few scattered showers. In the West, a strong low pressure system in the Pacific Ocean approached the West Coast and pushed a cold front onshore. Because this system had obtained ample moisture before it moved onshore, it has spread scattered showers over the Pacific Northwest and northern California. Highs remained in the 50s and 60s across most of the coast with increasingly cloudy skies. In the center of the nation, mild weather on Monday as high pressure built over the Plains and Great Lakes. The North saw plenty of sunshine with highs in the 60s. The Southwest however, saw a few scattered showers as an upper level trough moved through Arizona and New Mexico. No Significant rainfall has been reported.
The quiet severe weather season was abruptly interrupted on Friday as a strong storm moved out of the Rockies and brought the threat of severe weather to parts of the country. The same cold front that provided severe weather, including thunderstorms and tornadoes, to the western plains on Thursday raced through the Plains toward the Mississippi Valley on Friday. It pulled a tremendous amount of moisture into the Lower Mississippi Valley and instigated heavy rain and thunderstorms in Arkansas, Louisiana, and Mississippi in the afternoon. These thunderstorms were capable of becoming severe, thus Tornado Watches were posted for this area. Farther to the north, the warm front associated with the storm produced widespread rain in the Upper Mississippi Valley and into the Northern Plains, while a mixture of rain and snow continued to fall in the Central Rockies. Thunderstorms in Nebraska also instigated Tornado Watches. The threat for tornadoes will persist into the evening, with the biggest threat in the Lower Mississippi Valley. Residents should monitor local weather conditions and be prepared for severe weather.
The Northeast rose into the 50s and 60s, while the Southeast saw temperatures in the 70s and 80s. The Northern Plains rose into the 60s and 70s. The Northwest rose into the 50s and 60s.
The severe weather season continued in a big way on Saturday. A major storm moved through the Plains and into the Mississippi Valley, providing active weather for many areas of the country. The cold front associated with the storm swept into the Mississippi Valley and pulled a tremendous amount of moisture northward from the Gulf of Mexico. This moisture provided widespread rain, strong thunderstorms, and numerous tornadoes throughout the Southeast and into the Middle Mississippi Valley. Reported tornadoes throughout Mississippi and northeast Louisiana caused downed trees and structural damage to buildings. Strong thunderstorms also produced damaging wind in a wider area. One tornado was also reported in northern Missouri as deep moisture produced widespread thunderstorms in that state as well. Severe weather is likely to continue for much of the rest of the day as the storm moves east. Strong thunderstorms rolled through the Tennessee Valley and Tornado Watches were posted from the central Gulf Coast through southern Illinois and southern Indiana.
The West was a stark contrast to this active weather as dry conditions were reported west of the Rockies. The Northeast rose into the 60s and 70s, while the Southeast saw temperatures in the 70s and 80s. The Northern Plains rose into the 60s, while the Northwest saw temperatures in the 40s and 50s.
25th-30th…Active weather continued in the East on Monday as a potent storm system from this past weekend trekked toward the Atlantic Ocean. Strong winds wrapped around the system, while numerous showers and thunderstorms persisted from the eastern Ohio Valley to the northern Mid-Atlantic and southern New England. Meanwhile, stronger weather activity developed ahead of the tail of an associated cold front that stretched through the Carolinas and across the Florida Peninsula. Rainy and stormy weather over southern Florida began to dry out during the afternoon as storms moved into the nearby Atlantic waters. Behind active weather in the East, a frontal boundary draped across the Plains and the Upper and Mid-Mississippi Valleys sparked areas of scattered showers across the Dakotas, Iowa, and northern Oklahoma. In the West, clouds began to push into the Pacific Northwest as a Pacific cold front approached the Coast. Cooler temperatures accompanied increasing clouds through the afternoon and put an end to the warming trend across the Pacific Northwest and California. The rest of the West remained under the influence of high pressure with mostly sunny skies and warm temperatures.
Wet and snowy weather persisted over the Western half of the country on Wednesday. A low pressure system continued to move over the West Coast and into the Rocky Mountains. This system created a cold front that swept over the Central and Southern Rockies and produced some strong winds. Redvale, Colorado reported 35 mph sustained winds with gusts up to 46 mph. Fire threats increased over the Southwest due to hot and dry conditions. Meanwhile, the low pressure system brought some late-season snow to high elevations of the Northern Rockies, Intermountain West, and Great Basin. Parts of Utah reported 2-4 inches of new snow, while the Cascades and Sierra Nevadas saw 1-2 inches. The Northern Rockies also saw some strong winds at high mountain passes. Great Falls, Montana reported gusts up to 43 mph and only an inch of new snow. Lower elevations of the West Coast saw light and scattered rainfall throughout the day. Five Cent, California reported 0.19 inches of rain. Most of the Western US remained in the 40s and 50s on Wednesday. In the East, a slow moving low pressure system pushed offshore and into the Atlantic Ocean. This system allowed for some light and scattered showers to persist over the extreme Northeast. A few light flurries fell at higher elevations of Vermont and New Hampshire. As high pressure built in from the Plains and Mississippi Valley, cool air was pushed in from Canada and the Great Lakes. This allowed for overnight lows to dip to near freezing temperatures over most of the Midwest, Ohio River Valley, and New England. However, this ridge of high pressure brought plenty of sunshine and allowed for daytime highs to reach into the 60s and 70s.
Another strong cold front moved through the Plains toward the Mississippi Valley Friday, renewing severe weather in the area. A tremendous amount of moisture streamed ahead of the front, producing widespread heavy rain and intense thunderstorms. Some of these thunderstorms had the possibility of becoming severe as large hail and damaging winds were produced from eastern Kansas through southern Minnesota. Tornado Watches were posted for a large swath of the country from northeast Texas through southern Wisconsin in anticipation of tornadic development. The front and associated thunderstorms also produced strong winds in the Middle Mississippi Valley, while the downpour of rains instigated flooding concerns in the same area. The threat of severe weather was expected to continue into the evening as the storm moves eastward. Meanwhile, scattered showers and thunderstorms developed over Florida, and scattered late season snow showers were reported in the Rockies. The West Coast remained dry and mild as a high pressure system continued to build over the region. The Northeast rose into the 70s and 80s, while the Southeast saw temperatures in the 80s. The Southern Plains rose into the 80s and 90s, while the Rockies saw temperatures in the 30s and 40s. The Southwest rose into the 60s and 70s.
Jim G. Munley, jr.
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