Latest news with #meteorologists
Yahoo
an hour ago
- Climate
- Yahoo
Summer sizzle: NYC, Boston among cities eyeing record highs this week
Summer sizzle: NYC, Boston among cities eyeing record highs this week Intense heat is set to surge into the Northeast late this week, with temperatures climbing high enough in some areas to challenge daily records, according to AccuWeather meteorologists. The brief burst of heat will be fueled by a piece of a larger heat dome anchored over the Great Plains, which is expected to break off and push eastward heading into the weekend. While average temperatures in late July are typically the highest temperatures of the year, driven by intense sunshine, warmer Atlantic and lake waters and long days-this upcoming event may push the upper bounds of historical norms. But, even with routine temperatures typically very high this time of the year, some locations may set daily record highs from Friday to Saturday in parts of the Northeast. Temperatures began to climb on Thursday with widespread highs well into the 80s to mid-90s for the Northeast. Friday will bring the crest of the heat in New England and in the zone from Upstate and eastern New York to portions of New Jersey and northern and eastern Pennsylvania. "In Hartford, Connecticut, the current record of 98 set in 2001 on Friday may be topped," AccuWeather Senior Meteorologist Chad Merrill said. "The record of 99 set in 2016 in Newark, New Jersey, may be swapped by a triple-digit reading." The high temperature in New York City on Friday is projected to approach the record high of 97 from 1999. Meanwhile, in Boston, the high temperature on Friday could come near the record of 96 set way back in 1882, but is forecast to fall a few degrees short with thunderstorms approaching in the late afternoon. "Showers and heavy thunderstorms follow late in the day on Friday and bring a significant cooldown to the upper 70s on Saturday," Merrill said. "This will be a very similar pattern to last month when Boston hit 102 degrees on June 24 and cooled to the upper 70s for highs two days later," Merrill added. Lower humidity will accompany the cooler air in New England and the upper part of the mid-Atlantic on Saturday and may push southward a bit more on Sunday along the Atlantic coast for a time. The temperature boundary will be a focusing point for at least spotty thunderstorm activity this weekend. The storms will extend from parts of the Ohio Valley and Great Lakes states to the mid-Atlantic coast. With more cloud cover around and the likelihood of some local cooling breezes from thunderstorm activity, temperatures may inch downward just a bit over the mid-Atlantic during the weekend but far from the extent enjoyed by millions from this past Monday to Tuesday. Highs in Washington, D.C., will trend downward from near the century mark on Friday to the mid-90s on Saturday and the low 90s on Sunday to put the mid-Atlantic region's cooling trend in perspective. The core of the heat dome will settle southward in the Eastern states over the weekend and will take up residence in the Southeast from Saturday to Wednesday. During this weekend alone, 175 million people will experience RealFeel Temperatures of 100 degrees or higher in the East. The cooling trend in the mid-Atlantic will likely briefly reverse early next week with highs well into the 90s from Monday to the app? Unlock AccuWeather Alerts™ with Premium+ "Much more sweeping changes will come through the Northeast from Tuesday to Wednesday, depending on location, "Merrill said. "A touch of autumn is expected for a few days during the middle to latter part of next week with lower-than-historical average highs that will linger into the first few days in August." The transition could be marked by drenching downpours and gusty thunderstorms. Those with travel plans are encouraged to keep abreast of the forecast for timing and locations of the most severe activity that could lead to disruptions. "In the wake of the storms next week, nighttime temperatures will drop into the 30s and 40s in the Adirondacks and Green and White Mountains with comfortable 60s for much of the Interstate 95 corridor by the end of next week," Merrill said. 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
Yahoo
a day ago
- Climate
- Yahoo
Tornado, damaging wind risk in Ontario and Quebec; prepare in case of outages
Heat and humidity return to Central Canada, elevating the thunderstorm risk in both Ontario and Quebec Thursday. DON'T MISS: Several lines of severe thunderstorms are expected to develop as humidity and instability peak during the afternoon and evening hours. Key factors driving this weather include moisture, instability, wind shear, and a low pressure system acting as a trigger. While the main risks are hail, heavy downpours and potent, potentially damaging wind gusts, there is a chance of rotation and one or two tornadoes for parts of northeastern Ontario, Lake Huron-Georgian Bay shores and Quebec. Make sure you keep an eye on the radar––especially if you have outdoor plans––and stay aware of any severe weather watches or warnings issued in your area. Thursday: Severe storm threat bubbles up with the rising humidity and instability Southern and eastern Ontario will experience humidex values near 40°C during the afternoon, with dry conditions likely until storms develop in the evening hours. SEE ALSO: Timing: 4-5 p.m. Thunderstorm activity is expected to begin as early as 4–5 p.m. in northeastern Ontario and parts of Quebec, where severe weather has the highest confidence. Early-stage storm development may lead to isolated, rotating cells capable of producing tornadoes, particularly in Quebec. Heavy rainfall is also a significant risk, with totals exceeding 50 mm locally due to multiple storm cells passing over the same areas. Localized flooding is a concern. RELATED: 7-8 p.m. As storms mature, a transition to a more linear pattern is expected, increasing the likelihood of damaging wind gusts between 90–100+ km/h, particularly along Georgian Bay and Lake Huron Shores from 7–8 p.m. onwards. Late evening and overnight: Thunderstorms may reach the northern Greater Toronto Area (GTA) during the late evening or overnight hours, but will weaken as energy diminishes. DON'T MISS: Rainy periods could persist into Friday morning for parts of the GTA. WATCH: In a tornado warning? Here's what you should do Click here to view the video Signs of cooler weather for the August long weekend Early next week, conditions will stay mostly sunny, hot, and humid, accompanied by a chance of passing thunderstorms. A strong cold front is expected to sweep south through the region midweek, bringing a heightened risk of thunderstorms. By late next week, cooler air will settle in, with temperatures expected to remain below seasonal averages through the August long weekend and into the first week of the month. However, a return to significantly warmer weather is anticipated for the second week of August. Stay with The Weather Network for more information and updates on your weather across Ontario and Quebec.
Washington Post
a day ago
- Climate
- Washington Post
CWG Live updates: Hot today and sweltering Friday; weekend storm chances rise
Welcome to updated around-the-clock by Capital Weather Gang meteorologists. Happening now: The morning is pleasant with temperatures climbing through the 70s. Afternoon highs in the mid-80s to low 90s work up a sweat. What's next? The heat plaguing the South reaches our area Friday with highs well into the 90s for most. Weekend highs are only incrementally less hot with scattered storms possible each afternoon and evening. Today's daily digit — 5/10: Heat and humidity are on the rise under sunny skies. | 🤚 Your call? The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale. Forecast in detail Today (Thursday): Temperatures rise steadily under sunny skies. The pop-up clouds are not rain producers but offer occasional shade as highs creep up to the mid-80s to lower 90s. Moderately high humidity (dew points in the upper 60s) is more noticeable than previous days but could be worse. The light breeze from the south is welcome. Confidence: High Tonight: The evening is still warm with 80s not giving way until dark. Skies remain mostly clear with lows in the upper 60s to mid-70s. Confidence: High Tomorrow (Friday): Heat peaks under sunny skies with highs mainly in the mid- to upper 90s with a possible 100-degree reading or two in hot spots. A lack of breeze and dew points creeping into the lower 70s add to the misery, with peak heat indexes of 100 to 105. A dying cool front to the north only offers a slight chance of an isolated late-day storm. Confidence: Medium-High Tomorrow night: The heat hangs on through the evening, but lows do eventually range through the 70s. Any storms should remain isolated. Confidence: Medium-High A look ahead Saturday and Sunday hold more potential to set off afternoon and evening storms with locally heavy downpours possible. Highs in the upper 80s to mid-90s feel about 4 to 8 degrees warmer given the return of high humidity. Overnight readings slip into the 70s. Confidence: Medium Sunshine is a bit more abundant on Monday and Tuesday, and showers and storms are generally isolated in nature. This allows highs to creep back into the low to mid-90s with upper 90s in the hotter spots. Enough humidity lingers to make it feel like the upper 90s to lower 100s. Confidence: Medium Not to get hopes up too much, but the latter half of next week has fairly good model support for a more notable cooldown. Fingers crossed! Confidence: Medium Today's daily digit — 5/10: Heat and humidity are on the rise under sunny skies. | 🤚 Your call? The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale. Forecast in detail Today (Thursday): Temperatures rise steadily under sunny skies. The pop-up clouds are not rain producers but offer occasional shade as highs creep up to the mid-80s to lower 90s. Moderately high humidity (dew points in the upper 60s) is more noticeable than previous days but could be worse. The light breeze from the south is welcome. Confidence: High Tonight: The evening is still warm with 80s not giving way until dark. Skies remain mostly clear with lows in the upper 60s to mid-70s. Confidence: High Tomorrow (Friday): Heat peaks under sunny skies with highs mainly in the mid- to upper 90s with a possible 100-degree reading or two in hot spots. A lack of breeze and dew points creeping into the lower 70s add to the misery, with peak heat indexes of 100 to 105. A dying cool front to the north only offers a slight chance of an isolated late-day storm. Confidence: Medium-High Tomorrow night: The heat hangs on through the evening, but lows do eventually range through the 70s. Any storms should remain isolated. Confidence: Medium-High A look ahead Saturday and Sunday hold more potential to set off afternoon and evening storms with locally heavy downpours possible. Highs in the upper 80s to mid-90s feel about 4 to 8 degrees warmer given the return of high humidity. Overnight readings slip into the 70s. Confidence: Medium Sunshine is a bit more abundant on Monday and Tuesday, and showers and storms are generally isolated in nature. This allows highs to creep back into the low to mid-90s with upper 90s in the hotter spots. Enough humidity lingers to make it feel like the upper 90s to lower 100s. Confidence: Medium Not to get hopes up too much, but the latter half of next week has fairly good model support for a more notable cooldown. Fingers crossed! Confidence: Medium
CBS News
2 days ago
- Climate
- CBS News
Hot & humid weather return to Maryland to close out the week
The string of comfortable, low-humidity days is coming to an end across the region, as a surge of July heat and humidity takes hold for the remainder of the week. Humidity has been steadily increasing Wednesday, setting the stage for a warmer night ahead. Overnight lows will only drop into the low 70s for most, with a few isolated spots dipping into the upper 60s under partly cloudy skies. Thursday will feel more like midsummer, with highs reaching the upper 80s to lower 90s. Combined with the rising humidity, heat index values will climb into the upper 90s by the afternoon. The peak of the heat arrives Friday. Highs are expected to soar into the mid to upper 90s, with oppressive humidity pushing the heat index above 105 degrees in some locations. In addition to the dangerous heat, there's a marginal risk for severe weather Friday afternoon. Damaging wind gusts, frequent lightning, and heavy rainfall capable of causing isolated flash flooding will all be possible. Saturday continues the trend of intense summer weather, with highs in the low to mid 90s and heat index values again exceeding 100. Thunderstorm chances return by the afternoon, and the threat for an isolated severe storm and flash flooding persists. More of the same is expected Sunday, though temperatures may moderate slightly, with highs near 90. However, high humidity and the potential for strong storms will continue. Relief from the heat may arrive briefly early next week. Monday and Tuesday will remain dry but hot, with highs in the 90s. A cold front is expected to move through Wednesday, bringing another round of storms and, potentially, a refreshing drop in humidity to close out the week. Residents are advised to stay hydrated, limit outdoor activities during peak heat hours, and remain alert for changing weather conditions through the weekend.
CBS News
2 days ago
- Health
- CBS News
How is the heat index calculated? Why it's more important than air temperature during some heat waves
During the hot, humid summer months, meteorologists often discuss the heat index instead of the actual air temperature. But how is the heat index calculated, and why is it more important than the air temperature during some heat waves? Spending time outdoors or exercising outside can feel very different depending on humidity levels — from crisp mornings when it seems you do not even sweat, to muggy summer afternoons when the air feels like a steam sauna. Humidity is a measure of how much moisture is in the air, which originates from the water cycle. When the sun hits the Earth's lakes and oceans, a fraction of that water evaporates into a gaseous form called water vapor. That water vapor, or humidity, then blows from place to place as air moves around the planet. The heat index is a complicated calculation that factors humidity into the air temperature, giving us a more representative number of how it feels outside when the humidity is high. It looks like this: HI = -42.379 + 2.04901523*T + 10.14333127*RH - .22475541*T*RH - .00683783*T*T - .05481717*RH*RH + .00122874*T*T*RH + .00085282*T*RH*RH - .00000199*T*T*RH*RH Ultimately, it's all about how easily sweat evaporates off of your skin. Sweat is the body's natural air conditioning system. Evaporation is a cooling process, so when sweat evaporates off of your face, is pulls heat out of your skin and dissipates it into the surrounding air, leaving your skin slightly cooler. But the amount of humidity in the air has a big impact on how much of your sweat evaporates, and how easily your body can cool itself. On a crisp, low humidity day, sweat evaporates so easily off of your skin that you may not realize you are sweating at all. In extremely dry climates like Phoenix or Palm Springs, you may even feel cold after getting out of the swimming pool on a 100-degree day. That is because water is evaporating off of your skin so rapidly in the low humidity environment, it cools your skin well below the air temperature. In a high humidity environment, like a tropical beach, the air surrounding your body is too moist for sweat to evaporate off of your skin. Your body continues to sweat in an effort to cool itself, but heat keeps building up since the sweat is not evaporating. The heat index is a measure of how hot the temperature and humidity feel to the human body in the shade. Heat index values can be 15 degrees hotter in direct sun.
