Aikyam-Lab/Synoptic-Bench huggingface dataset:
- Cooler temperatures and thunderstorms will follow, midweek. Upper ridge continues to gradually build over the area from the south with temperatures climbing into the upper 90s to lower 100s today. The heat is rapidly returning as the "Bug Bubble" begins to slide back to the west, influencing the High Plains even more. Overnight, we expect temperatures to cool into low 60s in the northwest to the low 70s in the southeast.
Lower clouds are occurring behind a boundary that moved south from AB with cooler temps and elevated dewpoints, which should spread south as far as around Great Falls by 6am. The overall setup changes little on Monday, though a somewhat better defined wave ejecting out of the west coast trough will track across the Northern Rockies late Monday, bringing additional lift.
238 AM PDT Sun Jul 27 2025 A trough across the West Coast will continue cooler than normal weather through the weekend.
Building high pressure yields a stretch of hotter weather with temps peaking in the low 90s during the first half of the coming week.
635 AM EDT Sun Jul 27 2025 -Hot and humid weather continues today with apparent temperatures expected to reach the low 90s.
Showers and thunderstorms this morning will decrease in coverage this afternoon as a warm front lifts northeastward.
We'll continue with the thunderstorm theme yet again this afternoon as a deep trough just off shore over helps destabilize the atmosphere. the level of free convection(LFC) pushes up to about 10000 feet east of the Cascades, which is on the higher side.
521 AM MDT Sun Jul 27 2025 - Hot and dry through Monday, with locally high fire danger in the high country.
655 AM EDT Sun Jul 27 2025 - Strong ridge of high pressure over the Southeast US will keep rain chances much below normal through Monday with unusually high temperatures and heat indices.
/EC/ Hi-res guidance continues to show a hot dome of high pressure over the southeast CONUS. This combined with daytime highs peaking the upper 90s, and dewpoints in the mid/upper 70s (with a few areas seeing dewpoints in the low 80s) will allow for heat indices across our CWA to be in the 110-120 degree range.
630 AM EDT Sun Jul 27 2025 Hot high pressure will continue this heat wave through much of this week.
1212 PM CDT Sun Jul 27 2025 An expansive upper ridge will begin to retrograde towards the region today. A few afternoon/showers are still possible over the NW half of the state as upper level energy rotates clockwise around the periphery of high pressure. Rain chances will diminish early week through mid-week as the aforementioned upper ridge moves overtop of the region providing large scale forcing for subsidence. At the surface, high pressure will slide into the region from the SE CONUS.
(Today and tonight) The high pressure ridge that was previously sitting across the southeastern U. Highs will mostly be in the lower to middle 90s for most locations. Lows will be in the lower to middle 70s. (Monday night through next Sunday) Temperatures will continue to increase over the next few days, as the upper high shifts over our area and strengthens.
- Cooler temperatures and thunderstorms will follow, midweek.
143 PM EDT Sun Jul 27 2025 Hot high pressure will continue this heat wave through much of this week.
Current surface flow is fairly diffluent and the upper high over the southeastern CONUS is expected to expand westward today and be centered over the ARKLATEX region by late Monday afternoon.
339 PM EDT Sun Jul 27 2025 A weak cold front will cross from north to south through early this evening.
Pattern Synopsis and Forecast: High pressure aloft remains centered across the southeast with above normal heights across a good chunk of the nation really. Subtle mid level perturbation on the northern periphery of this ridge axis will move eastward across Ontario, with an associated weak low pressure system. One limiting factor will be the warmer temps and subsidence aloft, but northeast lower looks to have the best juxtaposition of slightly cooler temps aloft and timing of the frontal boundary during the afternoon hours. Heat on Monday: Temperatures on Monday will rise into the low 90s with low level dewpoints remaining around 70 degrees, or in the lower 70s.
Rain chances are back in the forecast as the Saharan Air Layer (SAL) trudges west along with the previously mentioned ridge. Expect seasonably warm conditions with highs near 90 and lows in the lower 80s. The Atlantic ridge will finally begin workings its way across South and Central Florida heading into mid week. The ridge will not be very strong.
High pressure over the southeast U. By midweek deeper moisture will return allowing for higher rain chances, but then the low level ridge axis will have sunk to across south Florida with a southwesterly flow (Regime 4) setting up. Therefore, the highest rain chances during the second half of the week will shift to the interior.
303 PM EDT Sun Jul 27 2025 Scattered rain showers through this early evening ahead of a warm front.
1252 PM EDT Sun Jul 27 2025 -Hot and humid weather continues today with apparent temperatures expected to reach the low 90s.
Temperatures are quickly climbing into the low and mid 90's across the region as a field of cumulus bubbles under the influence of peak heating. As referenced in recent days, upper ridging will continue to build across the region into Monday, and with it will come a decrease in PoPs through mid-week, and a noticeable increase in both afternoon temperatures and heat indices.
Rain chances are back in the forecast as the Saharan Air Layer (SAL) trudges west along with the previously mentioned ridge. From synopsis, a high pressure cell centered over the southeastern United States will shift westward towards the Texas Coast as lower pressure sets up along the Atlantic Coast. This will result in a split ridge pattern across Florida. The Atlantic ridge will make its way back across Florida beginning mid week.
1137 AM MDT Sun Jul 27 2025 - Hot and dry through Monday, with locally high fire danger in the high country.
Discussion: It will continue to be hot and humid with an strong upper-level ridge retrograding over the Lower Mississippi Valley.
Chances for afternoon and evening mountain thunderstorms this week, with the highest chances today and around mid-week.
WEATHER PATTERN OVERVIEW: Upper ridging over the Northern High Plains will begin to flatten out, leading to seasonable or near average temperatures for much of this week. Ensembles point to a strengthening ridge late in the week or during the weekend, which eventually could lead to a return to some hotter temperatures. Confidence is on the higher side that average temperatures and active thunderstorm chances will continue this week but more moderate on the exact placement and timing.
Temperatures were in the lower 90s for the most part, with heat index values in the 100 to 110 range.
Surface analysis shows a weak lee trough and dryline across eastern Wyoming as evident by low 30 dewpoints across south western Campbell county and 50 dewpoints across eastern Campbell county.
High-pressure system moves westward into the region this evening into early Monday, bringing more stable conditions.
There is a slight chance (5-20%) for showers and thunderstorms to develop across the Sierra Nevada Crest through this evening, with the greatest chances in the high country of Yosemite National Park. The upper-level trough that passed over northern portions of our forecast area will leave with us with a southwest flow aloft for at least the next few days. For today, expect slightly below average temperatures along with a slight chance of Sierra thunderstorms, but today's highs will be a tad warmer.
* A significant pattern shift will deliver a prolonged stretch of comfortably cooler and refreshing conditions to start the month of August. Max heat index values are fcst to run just shy of the century mark in the lower elevation to the east of the Allegheny Front. Shower activity should wane after 00Z as upper ridging continues to build over the region. Lows on Monday morning range from near 60s in the northwest mountains to the low 70s in the Lower Susquehanna Valley. An expansive 590+dm upper ridge/heat dome will dominate our weather for the first half of this week with limited rainfall and persistent heat/humidity.
249 PM MDT Sun Jul 27 2025 - Hot and dry through Monday, with locally high fire danger in the high country.
High pressure will build in, which will allow for generally clear skies outside of diurnal cumulus clouds and a gradual increase in temperatures as subsidence increases.
It has kicked off some showers over the lower Snake Plain and Boise mtns.
152 PM EDT Sun Jul 27 2025 - Strong ridge of high pressure over the Southeast US will keep rain chances much below normal through Monday with unusually high temperatures and heat indices.
613 PM CDT Sun Jul 27 2025 An expansive upper ridge will begin to retrograde towards the region today. A few afternoon/showers are still possible over the NW half of the state as upper level energy rotates clockwise around the periphery of high pressure. Rain chances will diminish early week through mid-week as the aforementioned upper ridge moves overtop of the region providing large scale forcing for subsidence. At the surface, high pressure will slide into the region from the SE CONUS.
The strong U/L ridge will hold over the forecast area tomorrow with another day of record heat and extremely high apparent temperatures. High pressure over the southeast U. By midweek deeper moisture will return allowing for higher rain chances, but then the low level ridge axis will have sunk to across south Florida with a southwesterly flow (Regime 4) setting up. Therefore, the highest rain chances during the second half of the week will shift to the interior.
* A significant pattern shift will deliver a prolonged stretch of comfortably cooler and refreshing conditions to start the month of August. An expansive 590+dm upper ridge/heat dome will dominate our weather for the first half of this week with limited rainfall and persistent heat/humidity.
Heat indices are still in the lower 90s with a few island communities seeing values in the mid 90s. A high pressure cell centered over the southeastern United States will shift westward towards the Texas Coast as lower pressure sets up along the Atlantic Coast. This will result in a split ridge pattern across Florida. The Atlantic ridge will make its way back across Florida beginning mid week.
729 PM EDT Sun Jul 27 2025 A weak cold front will cross from north to south through early this evening.
With that, expect strong gusty winds of 45 mph with localized areas experiencing severe level winds from any thunderstorm coming off the high terrain.
518 PM MDT Sun Jul 27 2025 - Hot and dry through Monday, with locally high fire danger in the high country.
Scattered rain showers through this early evening ahead of a warm front.
In addition to southwest breezes between 15 and 25 mph, the trough across the western CONUS has allowed heights aloft to drop, resulting in below-normal temperatures for a final day today. This trough will remain situated across the western CONUS, but a ridge of high pressure across the southern CONUS will begin to retrograde westward through the work week. The ridge's westward progression will allow heights to rise over the Desert Southwest, resulting in at-or-above normal temperatures returning to the region as soon as Monday.
743 PM EDT Sun Jul 27 2025 Showers and thunderstorms continue into the early evening with a crossing trough. Showers and thunderstorms return with a mid week cold front, with cooler and less humid weather to end the week. Dry weather is expected for much of the area during the day as a low- level high pressure builds in from the northwest.
729 PM EDT Sun Jul 27 2025 Hot high pressure will continue this heat wave through much of this week.
Active weather continues today with a slightly cooler and quieter pattern expected through the end of the week.
An upper-level trough anchored along the West Coast will keep a persistent onshore flow pattern in place through Tuesday. A slow warming trend will take shape through mid week as high pressure aloft over the southeastern United States meanders west. ***UPDATE*** An upper level trough will remain over the West Coast through the next few days, as high pressure gradually builds into the Four Corners region and into southern California.
155 AM EDT Mon Jul 28 2025 Hot and humid weather is expected through Tuesday under high pressure.
Very warm temperatures will continue with highs today and Tuesday in the lower 90s across the east coast metro and mid and upper 90s over inland South FL and SW FL. Max heat indices both days will be near advisory criteria, but dewpoints dropping a bit into the low/mid 70s during the afternoon hours should prevent the need for headlines, but it will be monitored closely.
Through Tuesday: The center of the subtropical high over the southeast CONUS will move west across the forecast area over the next few days resulting in dangerous heat stress once again, especially as low level trajectories shift more to a westerly, hotter direction and help to enhance the low level thermal ridge (e.
An anomalously strong and sprawling 591-597 dam sub-tropical heat ridge (some +2 to +4 STDEVs) stretching from the Southeast U. Global forecast models and ensembles are signaling some weakening of this heat ridge early to mid week. Despite some slight weakening, the heat ridge overall will remain stronger than normal. Of more importance, the heat ridge will begin to focus over the Desert Southwest and Southern Rockies Region.
Precipitation chances remain fairly low on Monday, with about a 20-30% chance of showers and storms across inland areas in the afternoon as high pressure slowly drifts away.
This in combination with high dewpoints in the lower to middle 70's each afternoon will make for high heat indices in the 105 to 112 range for most locations, perhaps even nearing Extreme Heat Warning criteria across coastal zones this afternoon and Tuesday afternoon with heat indices approaching 113 degrees. Heat risk values remain in the high to locally extreme territory for Monday into Tuesday as well.
1123 PM MDT Sun Jul 27 2025 - Hot and dry through Monday, with locally high fire danger in the high country.
- Increased rain chances and cooler temperatures may return towards the end of the week. (Today and tonight) The 598 dam mid-level ridge across the southeast U. Oklahoma and north Texas will be on the eastern edge of a low- level thermal ridge with southeast to northwest 850 mb temperature gradient ranging from 22 deg C across southeast Oklahoma to 26 deg C across northwest Oklahoma. With the ridge centered across Oklahoma and north Texas, no showers and thunderstorms are expected this afternoon.
(Today and tonight) Benign weather will continue today through tonight as mid/upper level heights increase in response to a westward shift in the ridging aloft over the SE CONUS. Temperatures today will be similar to or a bit warmer than yesterday with highs in the low to mid 90s on the Caprock and mid to upper 90s east of the escarpment, and lows tonight will again range from the mid 60s to mid 70s, both near average for this time of year.
307 AM EDT Mon Jul 28 2025 - Hot/humid today, chance of storms late tonight - Cooler/less humid late week - Hot/humid today, chance of storms late tonight The airmass that we've been in the past couple of days won't change much through Tuesday. However, the combination of highs in the lower 90s and dewpoints around 70 still results in apparent temperatures around 100; a heat advisory was issued for the entire cwa from noon to 9 pm. In classic ridge-rider fashion, a weak impulse aloft will traverse from southeast Montana across the northern Plains and collide with increasing low level jet, resulting in rapid development of a nocturnal MCS.
- Increasing rain chances will gradually return areawide by late week with the upper ridge shifting farther west as we close out the month of July. The strongest upper-level ridge of the summer season so far will become firmly entrenched across our region through the first half of this week.
This will lead to MLCAPE values in excess of 4000 J/kg, along and south of a west-to-east oriented warm front that is forecast to set up across the region. Southeast surface winds along the warm front, coupled with increasing westerly winds aloft will create a favorable deep layer shear profile for organized storms.
- Highs in the lower 90s Tuesday with heat indices from around 100 to locally 110 degrees.
157 AM EDT Mon Jul 28 2025 Hot high pressure will continue the heat wave through much of this week.
- Cooler conditions and low shower and thunderstorm chances late this week into the weekend. High level cloudiness will thin out some during the afternoon, and dew points will continue to slightly lower, which will lead to slightly warmer afternoon high temperatures.
150 AM EDT Mon Jul 28 2025 High pressure will build over the area today.
- Cooler temperatures and drier conditions mid week will provide relief from the hot and muggy weekend. The cap also is expected to weaken enough as the MCS moves across our south from a cold front moving south across the Northland. A brief period of smoke at the surface is possible behind the cold front today, which could lead to milky skies and hazy conditions. Once the cold front moves through, cooler and drier conditions will arrive for the mid week, and a high pressure will settle over the Upper Midwest.
However, there was still quite a bit of dry air through the lower and mid levels and low level CAPE was limited. The position of the lower level high will result in an east northeasterly steering flow. Expect temperatures to remain seasonal with highs near 90, lows in the lower 80s, and dew points holding in the mid 70s. The lower level high will migrate westward into the Texas and weaken over the next couple of days. At the same time, the troughing near the Atlantic Coast will swing out to sea, leaving weak ridging across our area. The Atlantic ridge will be able to build weakly westward across South and Central Florida heading into mid week, allowing east to southeasterlies to strengthen slightly.
High temperatures reach the lower 90s with peak heat index near 100 each day.
449 AM EDT Mon Jul 28 2025 Hot and humid weather is expected through Tuesday under high pressure.
Another upper low could bring increase chances for thunderstorms by mid week. High pressure is expected to generally remain east of the area. Coastal stratus is expected to form each night during this time with the potential for some clearing into the afternoons with highs in the low to mid 60s along the coast.
Highs today will remain around seasonable values ranging from the low to mid 90s east of the Divide and mid to upper 80s west of the Divide. A weak cold front is expected to start drifting into the far northern portions of the CWA by the late evening. This will create some isolated chances (~20%) for showers and thunderstorms mainly across the higher elevations of northern WY. A shift in the weather pattern looks to begin Tuesday as a deep trough begins moving towards the West Coast. This trough will shift upper level flow to a more southwesterly one, which will usher in monsoonal moisture from the Desert Southwest. Tuesday will also see the cold front mentioned earlier gradually trek south over portions of central WY.
Today, the heat continues as a strong upper ridge remains across our area. With the high to our southwest, we will be under northwest flow today.
630 AM EDT Mon Jul 28 2025 Hot high pressure will continue the heat wave through much of this week.
- Tuesday will be a few degrees cooler area-wide, with storms likely in the mtns and sctd storms I-25 corridor and pushing onto the plains late in the day.
Chattanooga Airport, TN 95 76 98 76 / 40 30 50 20 Knoxville McGhee Tyson Airport, TN 94 75 96 76 / 40 30 40 20 Oak Ridge, TN 94 74 96 75 / 40 30 40 20 Tri Cities Airport, TN 90 70 93 71 / 50 40 40 20 TN.
Cooler temperatures continue through the mid to late week with highs in the 70s.
- A cold front moves into the area on Tuesday, with heat index values over 100 degrees possible south of the front. - Scattered-widespread thunderstorm chances (30-70%) return to the area Tuesday evening-night along the cold front.
- A cold front pushes into the area tonight, bringing much needed relief from the heat. This will combine with dewpoints in the lower to middle 70s along and east of HWY 183, and lead to heat index values in excess of 105. Further west, dewpoints will be slightly lower, but this will be offset by warmer temperatures and push heat index values above 100. The outflow/effective cold front will continue to push southwards through the late evening, clearing the area off to the south by Tuesday morning. Scattered to more widespread convection will be possible as post-frontal upslope flow promotes thunderstorms along the higher terrain. Instability will be the biggest question mark with eastward extent, as both cooler temperatures (highs in 70s to 80s) and much less rich boundary layer moisture will be in place.
823 AM EDT Mon Jul 28 2025 Hot and humid weather is expected through Tuesday under high pressure.
The story won't change significantly for Monday as the upper level ridge strengthens a bit. Temperatures should end up near or a couple of degrees warmer than today, with some 100F highs likely across the lower elevations.
1059 AM EDT Mon Jul 28 2025 - Hot/humid today, chance of storms late tonight - Cooler/less humid late week Based on satellite trends over Lake Michigan this morning, have added 20-40% POPs areawide to cover a somewhat building shower/thunderstorm threat. However, the combination of highs in the lower 90s and dewpoints around 70 still results in apparent temperatures around 100; a heat advisory was issued for the entire cwa from noon to 9 pm. In classic ridge-rider fashion, a weak impulse aloft will traverse from southeast Montana across the northern Plains and collide with increasing low level jet, resulting in rapid development of a nocturnal MCS.
502 AM EDT Mon Jul 28 2025 Hot and humid weather is expected through Tuesday under high pressure.
Ensembles point to a strengthening ridge late in the week or during the weekend, which eventually could lead to a return to some hotter temperatures. Confidence is on the higher side that average temperatures and active thunderstorm chances will continue this week but low to moderate on the exact placement and timing.
628 AM EDT Mon Jul 28 2025 - Hot/humid today, chance of storms late tonight - Cooler/less humid late week - Hot/humid today, chance of storms late tonight The airmass that we've been in the past couple of days won't change much through Tuesday. However, the combination of highs in the lower 90s and dewpoints around 70 still results in apparent temperatures around 100; a heat advisory was issued for the entire cwa from noon to 9 pm. In classic ridge-rider fashion, a weak impulse aloft will traverse from southeast Montana across the northern Plains and collide with increasing low level jet, resulting in rapid development of a nocturnal MCS.
- Cooler conditions and low shower and thunderstorm chances late this week into the weekend. Heat and humidity remain the story today, with afternoon temperatures expected to be warmer than the last several days. Given current observations, portions of the Arkansas River Valley and areas east of Highway 75 in northeast Oklahoma will be most susceptible to hanging on to the highest dew points this afternoon, leading to heat index values near to just above 110. High level cloudiness will thin out some during the afternoon, and dew points will continue to slightly lower, which will lead to slightly warmer afternoon high temperatures.
The overall pattern changes little through rest of the week and into the weekend with additional energy moving through the area and perhaps a stronger wave ejecting out of the west coast trough across the region by Fri/Sat.
1006 AM EDT Mon Jul 28 2025 High pressure will remain draped across our region through Tuesday.