Karissa is the Director of On-Air Operations at WeatherNation. Karissa grew up loving math and science, but really fell in love with Meteorology while attending the College of DuPage in Glen Ellyn, Illinois. After two summers of storm chasing in the central plains, she knew that it was the career path for her. Standing in front of a thunderstorm and feeling the cool outflow knock her over was an experience she will never forget. After two years at COD, she transferred to Metropolitan State University of Denver. Karissa graduated Magna Cum Laude with a Bachelors of Science in Meteorology. Her high school and college speech and meteorology professors were extremely supportive and pushed her to succeed. Before joining the WeatherNation team, she previously worked as the Morning Meteorologist at KCAU-TV in Sioux City, Iowa and at WMBD-TV in Peoria, IL. She recently was part of a National Edward R. Murrow award winning team for breaking news for their coverage of the EF-4 tornado in Washington, Illinois. In her free time, Karissa enjoys cooking and trying new foods. She is a self proclaimed 'TV Junkie' who can get into just about any show. She is a die hard Chicago sports fan who loves attending professional sporting events.

Karissa Klos

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Winter alerts have already been issued for the Sierra Nevada as a large digging trough disrupts the <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.weathernationtv.com/news/warm-weather-sticks-around-the-west">warm ridge that's been residing in the west</a>. The west can expect widespread rain chances, mountain snow and cooler temperatures for the rest of the work week.<h1>SET-UP</h1>A digging mid to upper level trough will bring in widespread vertical lift to the western U.S. As the trough helps draw in tropical moisture, it will meet a cool low pressure system at the surface. As a cold front crashes east and south, precipitation chances will spread from border to border, into the Cascades, Rockies, and eventually across the country.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 073335-1762871622394.png">Onshore flow will begin Wednesday allowing for a few pre-frontal showers. As the cold front moves inland Wednesday night, storms will become more wide spread, especially through Oregon and northern California. Dropping overnight temperatures will ensure snowfall in the mountainous regions, that will carry into Thursday. As the front pushes south, southern California will see a good chance at rain by Thursday evening. We may even see some snow at the highest elevation peaks in SoCal. As the surface low wraps up within itself, scattered showers and mountain snow will continue across the Pacific northwest Thursday.The first wave will move into the Rockies and Four Corners states on Friday, as another trough comes ashore. This will mean another round of precipitation from Northern California to the Canadian border, moving into the northern Rockies for the weekend. <video src="https://media.weathernationtv.com/app/uploads/2025/11/Wide west Bams-1762872266764.mp4" controls="true" width="100%"></video><h1>CALIFORNIA IMPACTS</h1>Winter alerts have already been issued for the Sierra Nevada, beginning Wednesday evening and lasting through the end of the day on Thursday. One to two feet of snow is expected at and above pass level, and 4-12" possible above 5000 feet. <img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 072919-1762871768828.png"><img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 073736-1762871871090.png"><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.weather.gov/rev">NWS Reno</a> is also highlighting the danger of the winds. Gusts will easily reach 40 mph, but could exceed 100 mph along ridge tops. With snow falling, whiteout conditions will make driving impossible. <img src="https://media.weathernationtv.com/app/uploads/2025/11/WeatherStory3-1762872780059.png">Rainfall totals will be heaviest along the northern California coastline where the brunt of the moisture is focused from the atmospheric river. We will have to watch out for totals in southern California to reach 1-2" at lower elevations and 2-4" in the mountains and hills. <h1><img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 075429-1762872879293.png">NORTHWEST IMPACTS</h1>Coastal areas will see the highest rain totals, especially in southwest Oregon. <img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 075821-1762873129219.png">No winter alerts have been issued for the Cascades yet, but they will likely be needed as totals reach the 1-2 foot range. <img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 080034-1762873243169.png">

Administrator

Western Waves Bring Soggy, Snowy Pattern

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Kevin Schneider

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Arctic air is set to take a deep dive into the Southern United States. Millions of Americans will be impacted by these cooler temperatures. This cold outbreak is being driven by a strong upper-level low dipping southward from Canada, allowing frigid polar air to surge into the central and eastern portions of the country. This low will also help to drive multiple cold fronts across the country. There will be widespread subfreezing temperatures overnight, with many regions experiencing daytime highs that will struggle to climb above the freezing mark.&nbsp;Monday morning, areas from Kentucky to Florida saw record lows fall by the wayside. Even more will roll in early Tuesday morning. <img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 072556-1762871169290.jpg">In some areas, temperatures could run 20 to 30 degrees below average, especially across the Plains, Midwest, and Great Lakes region. Tuesday's lows will plummet into the 20s, 30s, and 40s all the way to the Central Gulf Coast States and Florida. Numerous frost and freeze alerts will be issued ahead of the coldest air - protect sensitive plants. Farther south, the cold air will bring the season’s first frost and freeze to areas that typically remain mild into late fall. The combination of Arctic high pressure and strong cold advection will make the air feel even colder, with wind chill values dipping into the single digits in northern states.&nbsp;<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 072704-1762871232406.jpg">This early blast of winter is a reminder that the transition from autumn to winter can happen abruptly when large-scale atmospheric patterns align. People should prepare by checking heating systems, protecting exposed pipes, and dressing in multiple insulating layers to guard against hypothermia and frostbite. The cold pattern may linger for several days before a gradual moderation occurs as the upper-level flow begins to flatten and the jet stream retreats northward.&nbsp;<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-10 172620-1762820787420.png">Get forecast details for your section of the country with our regional forecasts, which air at :10, :30, and :50 past the hour from east to west. You can also watch the latest forecast anytime with the WeatherNation app!

Arctic Blast Sends Temperatures Plummeting for Millions

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Tracey Anthony

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The lake effect snow season has arrived, with heavy snow expected now through Tuesday. Places in the Upper Peninsula of Michigan have already received a foot of snow! <img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-10 054716-1762778844004.jpg"> Winter weather alerts remain in place all across the shores of the Great Lakes through Tuesday. An additional 6-12" in some locations, with heavy snowfall rates likely reducing visibility at times, will make travel very difficult.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 073236-1762871565435.jpg"><img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-10 173144-1762821126773.png"><h1>How Lake Effect Works</h1>Water has a much higher heat capacity than air, meaning it takes more time to warm up and cool down. This leads to "mild" water temperatures in the Great Lakes while the air overhead can be much cooler. As the cold, dry air moves over these areas, it's able to evaporate moisture from the lakes until it condenses into clouds and precipitation before falling out over land. Typically, we need at least a 13° F difference between the lake water and the air aloft (around 1500 m, or 4500-5000 ft) for lake effect snow to form.<h1>Forecast</h1>With winds coming over the Great Lakes overnight, we can still anticipate lake effect snowfall to continue. Next, a quick-moving clipper will move through to bring a few wintry bands to the snowbelt.<video src="https://media.weathernationtv.com/app/uploads/2025/11/11-10_rne-1762821068070.mp4" controls="true" width="100%"></video>Travel impacts are expected, especially along the I-90 corridor, where major impacts are possible in NW Indiana. Make sure your vehicle is ready for winter travel with some good tread on your tires and a winter driving kit. You can catch the latest forecast for the Great Lakes anytime by using the WeatherNation app to view the Central Regional Forecast. You can also tune in to WeatherNationTV at :30 past the hour!

Lake Effect Snow Wraps Up Today

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If it hasn't been wet, it's been warm out West. This week looks no different as our good friend, an Upper Level Ridge, will keep hold for the next day. That will keep the quiet weather around, but will start to push temperatures into historic levels into midweek. Plenty of records fell over the weekend and on Monday, from California to Arizona.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-10 201032-1762830639778.png">Temperatures look to run above average through Wednesday for a lot of our southwestern cities.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-11 072530-1762871137794.png"><img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-10 172824-1762820909165.png">There is some good news in all of this: it's a short-lived snap of hot weather. By Tuesday and Wednesday, the breezy winds will back off, and that should help temperatures settle closer to normal for this time of year. Click over to your <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.weathernationtv.com/video-on-demand">West Regional Forecast</a> to find out how long it'll last in the Four Corners

Warm Weather for the Western U.S.

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<div class="twitter-tweet" style="display: flex; justify-content: center" data-twitt-post-id="1987357561679745278" src="https://x.com/WeatherNation/status/1987357561679745278"></div><img src="https://media.weathernationtv.com/app/uploads/2025/11/Web 3-1762697557299.png">The much-anticipated cold front that will slash temperatures has been moving through the Southeast. Ahead of the front, warm temperatures and plenty of moisture has kept the severe threat going overnight.The Storm Prediction Center has kept a severe weather threat at a MARGINAL (level 1 out of 5) risk for Florida into the overnight and dies down into Monday morning to be met with cold cold air behind.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-09 175721-1762736328951.png">

Alana Cameron

Severe Threat Ending With Florida

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Rob grew up in South Florida, where daily afternoon storms and hurricanes piqued his interest in meteorology early on. That interest was fostered by his teachers and his father, who one time brought him onto the roof of their home to watch a funnel cloud move through the Everglades several miles away. Years of filmmaking and tv production in high school gradually pushed him toward broadcast meteorology at Florida State University, where he joined and eventually led the student run daily weather show. After graduating with a Bachelors of Science in Meteorology, he began his career at KESQ in Palm Springs, California before heading to KFSN in Fresno and WLOS in Asheville, North Carolina. He has covered a diverse array of extreme weather events, including haboobs and flash flooding in the desert, extreme snow in the Sierra, hurricanes, and Appalachian ice storms. He also enjoys telling stories and reporting about weather issues.

Connect with Rob on <a href="https://twitter.com/WxRobBradley">Twitter</a>

Rob Bradley

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A system has been bringing snow across the Plains and Midwest on Saturday. This same system will continue to push through the Great Lakes into Sunday morning. Some areas have already seen some snow accumulation in the last 24 hours.<img src="https://media.weathernationtv.com/app/uploads/2025/11/pic6-1762642526724.png">Moderate rainfall and lighter snow will continue to drift east with the low-pressure system into Saturday night and Sunday morning. <video src="https://media.weathernationtv.com/app/uploads/2025/11/FORECAST-1762633208979.mp4" controls="true" width="100%"></video><h1>Winds &amp; Temperatures</h1>Afternoon highs will struggle to warm out of the 30s for most areas impacted by the precipitation. Keep in mind, another feature of quick systems like these is gusty winds. With wind gusts 20-30mph, it's going to feel even cooler. <img src="https://media.weathernationtv.com/app/uploads/2025/11/pic6-1762642809204.png">Much colder air is expected Sunday into next week as an <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.weathernationtv.com/news/record-warmth-possible-from-nevada-to-texas">arctic blast brings the coldest air of the season to many parts of the south central and southeastern U.S.</a> For more information, be sure to join us on WeatherNation at :30 past the hour for your Central Regional Forecast.

Patrick Crawford

Midwest Clipper Brings Light Snow, Gusty Winds

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Secondary severe weather season is underway across the U.S. - so called because it typically pales in comparison to the primary severe weather season in the spring. However, the fall can provide high-end severe weather threats of its own, including the December 2021 tornado outbreak. Thankfully, the severe weather setup for now through Sunday doesn't look to be on the high-end, but a few scattered severe storms will be possible.<hr><h1>Severe Storm Outlooks/Hazards</h1>Early morning severe storms will be possible along the cold front driving south. Large hail and damaging winds will be possible with any severe storms and the severe risk should diminish by sunrise.<img src="https://media.weathernationtv.com/app/uploads/2025/11/PIC 2-1762564233131.jpg">The threat for isolated severe storms will continue Saturday into Sunday as the cold front is dragged through the south. Check back in with us online or on air for an updated forecast.<img src="https://media.weathernationtv.com/app/uploads/2025/11/Screenshot 2025-11-07 044714-1762516046220.png">Overnight storms are possible, but the severe threat goes down Saturday before it returns to the Southeast on Sunday. Areas along the Atlantic Coast should be weather aware for Sunday.<video src="https://media.weathernationtv.com/app/uploads/2025/11/FORECAST-1762564282904.mp4" controls="true" width="100%"></video><h2></h2>

Jesse Kelley

Severe Storms Possible from Ohio to the Gulf Coast Friday and Saturday

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Significant flash flooding greatly impacted NYC and the tri-state area Friday, September 29. There were delays, cancellations and closures at major airports, on highways and city streets as well as the subway system. Governor Hochul issued a state of emergency for New York City, Long Island and the Hudson River Valley Friday in anticipation of major impacts from the flooding.<div class="twitter-tweet" style="display: flex; justify-content: center" data-twitt-post-id="1707787329195348049" src="https://twitter.com/WeatherNation/status/1707787329195348049"></div>Heavy rain began late Thursday around the Tri-State and in southern New England, with rain totals already surpassing 3" in some areas by sunrise. Additional rain totals of 3-5" then fell across the soaked region, presenting a significant threat of urban flooding and flash flooding. JFK Airport ended up with 8.64" of rain Friday, making it the rainiest day since 1948. Additionally, that broke a daily rainfall record and the September rainfall record.<img src="https://media.weathernationtv.com/app/uploads/2023/09/Screenshot 2023-09-29 161615-1696025844016.jpg">Although rain has moved out of the area for the last 24 hours or so, some parts of the city still have areas of standing water that have been slow to drain and recede. While dry conditions will continue across the Northeast this week, coastal flooding is possible as the full moon and moon near perigee will lead to king tides through Monday. Stay with WeatherNation for the latest in the aftermath of the flooding in the NYC metro.

Wettest Day in 75 Years for Parts of New York City

Western Waves Bring Soggy, Snowy Pattern

Winter alerts have already been issued for th

Arctic Blast Sends Temperatures Plummeting for Millions

Arctic air is set to take a deep dive into th

Lake Effect Snow Wraps Up Today

The lake effect snow season has arrived, with

Warm Weather for the Western U.S.

If it hasn't been wet, it's been warm out Wes

Severe Threat Ending With Florida

The much-anticipated cold front that will sla

Midwest Clipper Brings Light Snow, Gusty Winds

A system has been bringing snow across the Pl

Severe Storms Possible from Ohio to the Gulf Coast Friday and Saturday

Secondary severe weather season is underway a