Latest news with #highpressure
Yahoo
3 days ago
- Climate
- Yahoo
100-degree heat dome to set up shop over southern US
The heart of summer is here and a major pattern change unfolding in the coming days will yield searing heat for millions over the southern United States, centered over the Plains and Mississippi Valley, Accuweather meteorologists advise. The same pattern, caused by a massive area of high pressure, will limit heat and high humidity to a handful of days in the Northeast. Many locations that have avoided 100-degree heat thus far will rack up a string of triple digits in the days ahead. A northward bulge in the jet stream will develop while high pressure builds. This setup-a heat dome-can be very persistent. While the core of the heat dome may meander east-to-west and back in the weeks ahead, it may linger through a good chunk of August. Dallas, which as of July 21 had not hit triple digits, but could do so on any of the days over the next two to three weeks. The pattern will erase the below historical average temperature condition thus far in July (1.2 degrees below average) and is likely to finish the month near to above the historical average. "Kansas City, Missouri, has not hit 100 degrees since Aug. 25, 2023, but is positioned to do so on multiple days during the upcoming heat dome," AccuWeather Senior Meteorologist Chad Merrill said. The heat will make it difficult for manual labor jobs ranging from construction to agriculture, as well as the start of athletic training camps for the upcoming start of the school year. Caution is advised to take breaks and stay hydrated. It will take a while for the ground to dry out in some areas and, as that moisture is drawn into the air, it will make for very steamy conditions for a time, Merrill said. "Many cities from Nebraska and Missouri to Texas and Louisiana won't get relief at night with low temperatures to range from the mid-70s to the low 80s." "The zone from central Texas into the Ozarks in Arkansas and Missouri still has wet soil from recent rain," Merrill added. "The humidity levels will end up highest in this area, leading to extremely humid conditions this week. AccuWeather RealFeel® Temperatures will peak around 110 degrees this week in this zone." With the core of the heat dome centered over the southern Plains, it will be difficult for thunderstorms to occur. "The bottom line is that this has the look of a long-lasting heat wave with limited rainfall," Merrill said. "Drought will expand through the central Plains by mid-August and worsen in Kansas and Nebraska, where there are already pockets of moderate to extreme drought." As the ground dries out, temperatures will trend upward. Multiple days will have highs ranging from the mid-90s to the low 100s. In some areas, actual temperatures could even push 110 F as average soil moisture transitions to abnormally dry to drought conditions. Some tropical moisture can push westward from the Gulf and into parts of central and southern Texas and spill northward from Mexico and into the Deserts, Rockies and High Plains in the form of periodic thunderstorms. Pattern to bring rounds of cooler, less humid air to Northeast As the heat dome builds and meanders over the Southern states, a large southward dip in the jet stream will develop and persist from the Upper Midwest to the Northeast. This pattern will result in frequent fronts that bring extended bouts of cool and less humid air. Heat and humidity will surge ahead of the fronts, but likely only for a day or so here and there. In other words, the relentless sauna bath feel and torrential downpours leading to flash flooding should go away as the pattern evolves. However, there can still be quick-moving severe thunderstorms with brief downpours and strong wind gusts. The pattern will be a guard against tropical storms from making a northward run along the Atlantic coast of the U.S., as any storm that forms would be shunted out to sea or directed westward across the Gulf. A dose of cool air will visit the Northeast early this week. Heat will briefly surge back in later in the week in the Northeast. However, that heat is not expected to be of long duration and will likely be followed by an even more impressive surge of cooler and less humid air for the upcoming weekend. Areas from the central and northern Plains to the Ohio Valley and Southeast will need to be on guard for long-traveling complexes of damaging thunderstorms, known as derechos, in the pattern. Want next-level safety, ad-free? Unlock advanced, hyperlocal severe weather alerts when you subscribe to Premium+ on the AccuWeather app. AccuWeather Alerts™ are prompted by our expert meteorologists who monitor and analyze dangerous weather risks 24/7 to keep you and your family safer. Solve the daily Crossword
CBS News
3 days ago
- Climate
- CBS News
Summer's best stretch of weather yet arriving across Maryland
After a exhausting stretch of intense heat, miserable humidity, and powerful storms this summer, we're about to enjoy the nicest weather of the season so far. The combination of low humidity, plenty of sunshine, and comfortably warm temperatures will lead to spectacular outdoor weather now through Wednesday. We will remain storm-free, so rain will not dampen any outdoor activities or work through Thursday. Dangerous levels of heat and humidity followed by more powerful storms will return to the area Friday into the upcoming weekend. A well deserved break from the sweltering heat and humidity of this summer is here. Humidity levels continue to fall on this Monday morning as a cold front dips to our south. High pressure will have a firm grip of our weather now through Thursday. This keeps our forecast rain-free, so you can get in any outdoor activities or work without the threat of storms. The weather will be most comfortable today and tomorrow with humidity levels dropping to their lowest levels since the 4th of July. Highs this afternoon with a partly to mostly sunny sky will top out in the middle to upper 80s with a northerly breeze at 10 mph. This evening's weather will be stunning with a mainly clear sky, low humidity, and comfortable temperatures in the 70s. Overnight with a mostly clear sky, temperatures will dip into the lower to middle 60s providing refreshing sleeping weather. Tuesday will be the best weather day of this entire stretch. Expect a mostly sunny sky, low humidity, comfortably warm temperatures, and a light breeze. The weather will be nearly perfect by July standards. Make sure you wear plenty of sun protection as the UV index will be a very high 9. Wednesday will feature more abundant sunshine, warm temperatures, but humidity levels will be on the rise. Highs will top out in the middle to upper 80s. While it will be more muggy, the day still looks very nice to be out and about. Summer heat and humidity will make a return starting Thursday and will continue into the upcoming weekend. Highs Thursday will top out in the lower 90s with moderate levels of humidity. Friday the heat will become more extreme as temperatures soar into the middle to upper 90s with feels like temperatures reach the triple digits. The extreme heat will continue into the weekend. Tropical heat and humidity Saturday and Sunday with heat index values in the triple digits will give way to scattered strong to severe thunderstorms during the afternoon and evening. Any storm this weekend could deliver damaging winds, intense cloud to ground lightning, drenching downpours, and localized flooding. The WJZ First Alert Weather Team has tagged Saturday and Sunday as possible ALERT DAYS due to this one two punch of sweltering heat and humidity and the chance for severe storms.
CBS News
4 days ago
- Climate
- CBS News
Another beautiful, hot, humid day in South Florida as temperatures soar
The NEXT Weather Team is tracking a hot and humid Sunday across South Florida. While the National Weather Service has not issued a heat advisory, many people across the region will experience "feels-like" temperatures of 100-105 degrees. Cities across Broward County will experience the triple-digit "feels-like" temperatures from Weston to Hallandale Beach and up to Deerfield Beach. Miami-Dade County cities and neighborhoods will experience similar conditions starting around 11 a.m. and lasting through the early evening. A high-pressure center located over Central Florida is trapping the heat and blocking the formation of rain storms which would temporarily help cool down the area. Despite the lack of an official heat advisory, it is important to practice the regular safety precautions: stay hydrated, reduce outdoor afternoon activities, wear light-color clothing and stay in the air conditioning as long as possible. The scorching heat remains with us as we start the work week. By mid-week the high pressure move to the west and the rains return by Wednesday.
CBS News
6 days ago
- Climate
- CBS News
Lower humidity across Maryland Friday
A break from the oppressive heat and humidity is on the way for Maryland, with a cold front set to bring some overnight relief and usher in a period of more comfortable conditions. Temperatures will dip into the mid-70s overnight as the front moves through. On Friday, skies will be partly to mostly cloudy with noticeably lower humidity. The best chance for showers or storms will remain south and west of the Baltimore area, primarily across Northern Virginia, Southern Maryland, and western parts of the state near the frontal boundary. Highs will reach the mid-80s in the Baltimore metro, while areas south of the front may climb into the upper 80s. Humidity begins to return late Friday night into Saturday as skies remain mostly cloudy. Scattered showers and a few thunderstorms are possible, with highs in the low to mid-80s. The unsettled pattern continues into Saturday night and Sunday, with additional chances for rain and storms. Sunday will turn very humid again, with highs rebounding into the upper 80s. Rain chances linger into Sunday night and early Monday before tapering off as the front shifts south and high pressure builds in. A stretch of beautiful weather is expected Monday through Wednesday, with highs in the mid-80s and more comfortable humidity levels. Overnight lows will fall into the 60s to near 70 degrees. Humidity will gradually increase again by Wednesday and Thursday. By late next week, temperatures are forecast to rise back into the low 90s, with scattered storm chances returning by Thursday and Friday.
CBS News
7 days ago
- Climate
- CBS News
Cool, comfy #Top10WxDay Thursday in Twin Cities
High pressure moves in to help whip up a pleasant Thursday in the Twin Cities, with highs in the mid 70s, low humidity and smoke free skies. Storm chances return on Friday night into early Saturday. Temperatures gradually build back to summer over the weekend. Highs return to the mid 80s by next week with heat and storm chances on the rise.
