Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper level ridge building into the area from the south today with showers ending in the morning. Ridge shifting east tonight.
Tonight's lows won't be nearly as cold and tomorrow's highs will be even warmer than today's, despite additional cloud cover and the expectation of active weather.
The system does lack moisture - limiting the span of the precipitation shield as the lower levels continue to develop and deepen.
/NEW/ /Through Thursday Afternoon/ A warm and pleasant spring afternoon can be expected today thanks to ridging aloft and generally sunny skies. Highs will climb into the low to upper 80s for much of North and Central Texas, with a couple of locations out west approaching the 90 degree mark. This warming will be further enforced by compressional warming ahead of a cold front that is moving toward the region.
826 AM PDT Wed Apr 9 2025 A ridge of high pressure across the west coast will result in mostly sunny skies, above normal temperatures and light winds for the second half of the work week, with minor HeatRisk concerns in the afternoon. Sarment (Today and tonight) Upper level ridging will continue to gradually amplify today, steering high cirrus clouds to our north. As the ridge axis shifts farther inland tonight, a return of weak onshore flow and a weak marine layer will bring a return to some stratus development along the coast tonight into Thursday morning.
1258 PM CDT Wed Apr 9 2025 (Today through Thursday Night) Mid/upper ridging to our west will maintain a dry nw flow aloft.
235 PM EDT Wed Apr 9 2025 - High pressure dominates the forecast through much of this week and into the weekend, though a system passing south of the region will introduce a low chance (10-30%) for rain/snow showers today through tonight.
302 PM EDT Wed Apr 9 2025 High pressure sliding by to our south will provide mainly fair dry weather across the region this evening. Weak low pressure will then spread mixed precipitation across the region for the upcoming night that will change to just rain for Thursday. A longwave trough will move into the Great Lakes region through the end of the work week. While most of the night will be dry for most locations, a surge of moisture and isentropic lift ahead of the trough will move into southwest NY by daybreak. Thermal profiles suggest rain across the lower elevations and snow across the higher elevations through daybreak Thursday.
Looking at a warmer day with highs temperatures 6-10 degrees up from yesterday.
(This evening through Thursday) The region will feel the maximum effects of the longwave ridge today as the axis is overhead. Being under an area of high pressure and thus subsidence, this promotes a compressed/shallow marine layer which will result in both lower ceilings and visibilities, but it also means that it won't be deep enough to penetrate too far inland. - For those at risk, actions that can be taken: increase hydration, reduce time spent outdoors or stay in the shade when the sun is strongest, and open windows at night and use fans to bring cooler air inside buildings.
350 PM Update: High pressure continues to bring mostly sunny skies to the majority of the area, although a weak west-northwesterly flow continues to bring some occasional flurries and light snow showers for parts of Oneida County. Enough cold air may be present for some snow to mix in at some of the higher elevations, but temperatures will quickly warm up enough to transition to all rain area-wide by the afternoon. Scattered rain showers continue Thursday night, but will mix with snow at some of the higher elevations (especially the Catskills-Poconos) as temperatures will be just cold enough. Lows are expected to be in the lower to mid 30s. 340 PM Update Active unsettled weather expected for this time period as a slow moving upper level low moves through the area.
Overnight lows fall to the low to mid 40s and this first round of rainfall moves east by late Thursday morning.
119 PM EDT Wed Apr 9 2025 (Today and tonight) High pressure will dominate the weather today with light winds and abundant sunshine.
115 PM MDT Wed Apr 9 2025 KEY MESSAGES: - A ridge of high pressure builds over the region on Thursday causing warm and dry conditions. Meanwhile, high pressure remains on track to build into the Northern Rockies tonight, which will bring an end to the ongoing showers. Warm temperatures, ranging 15 to 20 degrees above normal, are expected on Thursday under the influence of a ridge of high pressure.
301 PM EDT Wed Apr 9 2025 Low pressure over the middle Mississippi River Valley will slowly move across the Ohio Valley tonight and Thursday. This will bring warmer temperatures and increased chances of precipitation. Cooler temperatures will follow to close the work week before a ridge of high pressure offers a warm up heading into the weekend. This will combine with a warm front draped across the Ohio Valley to bring rain through the early morning hours. Southwesterly flow ahead of the low will lift temperatures into the upper 50s to middle 60s by afternoon. Late in the day, a sagging cold front will bring colder air into the CWA from north to south. Deep mid level trough over the region at the beginning of the period will develop into a closed low over the Appalachians.
A high pressure ridge at the surface will shift slowly southeast into the eastern half of TN through AL, keeping winds light and variable. Mid level clouds will develop ahead of this feature tonight, with showers and thunderstorms developing in KY through west TN along a pre- frontal trough axis. Forecast soundings indicate steepening low and mid level lapse rates and deep bulk layer shear of 55-65kt as the upper jet and cold front arrive during the afternoon. Dew points will advect into the lower to middle 50s rather quickly on Thursday, but will be sufficient given the lapse rates to support SBCAPE values of 1000-1500 j/kg.
Given colder air aloft moving in behind this evening's cold front, conditions should destabilize enough to achieve several hundred to perhaps over 1000 J/kg SBCAPE by early afternoon. The highest values look to be south of I-70, where an overlap with strong deep layer shear of 30-40 kts is also forecast for the early afternoon, and has prompted a Marginal Risk for severe thunderstorms in portions.
A ridge of high pressure across the west coast will result in mostly sunny skies, above normal temperatures and light winds for the second half of the work week, with minor HeatRisk concerns in the afternoon. Sarment (Today and tonight) Upper level ridging will continue to gradually amplify today, steering high cirrus clouds to our north. As the ridge axis shifts farther inland tonight, a return of weak onshore flow and a weak marine layer will bring a return to some stratus development along the coast tonight into Thursday morning.
- A cooler and wetter weekend from a spring storm. High pressure and a ridge will keep Thursday dry and warm across the region.
A positively tilted trough axis is propagating across the Florida peninsula. As this clears out, high pressure is building back in at the surface. In response, a northerly wind continues to advect cooler and drier air back across the region. As the high slides farther east, the flow will start to veer to more of a NE direction and temps will start to climb in response.
1130 AM CDT Wed Apr 9 2025 - Gusty southwest winds of 25 to 35 mph today, with a return of warmer temperatures into the upper 60s to lower 70s.
1159 AM CDT Wed Apr 9 2025 (Today through Thursday) Upper trough now well to the east, from New England to the eastern Gulf, with upper ridging over the Intermountain West. At the surface, high pressure extended from the eastern Great Lakes to the western Gulf. Clear skies across the area, with temperatures mainly ranging from the upper 40s to mid 50s, although the warmer waters of Lake Pontchartrain adjacent to Lakefront Airport are holding temperatures there in the mid 60s. Forecast soundings would indicate high temperatures tomorrow should be about 3-5F warmer, which would put a few locations in the lower 80s.
238 PM EDT Wed Apr 9 2025 High pressure over the Mid-Atlantic region will move off the coast tonight.
pdf The local pressure gradient tightens as an inverted coastal trough develops over the area due to being in between an area of low pressure over the Bahamas and high pressure off the mid-Atlantic coast. Due to the the NNE flow, highs today will range from the low 70s along the coast to the upper 70s along the I-75 corridor. Lows tonight will be around seasonable in the upper 40s/low 50s inland to the low 60s along the coast. Otherwise, a warm and partly cloudy day prevail with highs in the mid 70s along the coast to the low 80s along the I-75 corridor.
1157 AM CDT Wed Apr 9 2025 - A pair of weak, dry cold front will pass through southwest KS Wednesday and Thursday morning, briefly halting the warming trend.
259 PM EDT Wed Apr 9 2025 - High pressure dominates the forecast through much of this week and into the weekend, though a system passing south of the region will introduce a low chance (10-30%) for rain/snow showers today through tonight.
- Breezy southerly winds this morning and afternoon ahead of a weak cold front. - Reinforcing frontal boundary moves through the region Thursday morning/ afternoon bringing cooler temperatures to end the week. Breezy southerly winds will switch to northwest later today as a dry cold front moves in from the northwest.
The position of a large upper level ridge over the western CONUS will steer northwest flow into the ArkLaTex. Aside from a few scattered clouds, mostly clear skies will prevail tonight, while sustained southerly surface flow will help keep overnight lows milder than in recent days, dropping only into the 50s areawide, followed by highs soaring back into the low to mid 80s tomorrow afternoon.
Cloud cover will increase, insulating us a little more and keeping overnight low temperatures in the low to mid 40s. Forecast soundings indicate steepening low and mid level lapse rates and deep bulk layer shear of 55-65kt as the upper jet and cold front arrive during the afternoon. Dew points will advect into the lower to middle 50s rather quickly on Thursday, but will be sufficient given the lapse rates to support SBCAPE values of 1000-1500 j/kg.
944 PM EDT Wed Apr 9 2025 Dry weather is expected today and Thursday as a ridge of high pressure covers the Carolinas.
High pressure will build into western Washington through Thursday morning, allowing for drying and warming.
753 PM EDT Wed Apr 9 2025 Low pressure over the middle Mississippi River Valley will slowly move across the Ohio Valley tonight and Thursday. This will bring warmer temperatures and increased chances of precipitation. Cooler temperatures will follow to close the work week before a ridge of high pressure offers a warm up heading into the weekend. This will combine with a warm front draped across the Ohio Valley to bring rain through the early morning hours. Southwesterly flow ahead of the low will lift temperatures into the upper 50s to middle 60s by afternoon. Late in the day, a sagging cold front will bring colder air into the CWA from north to south. Deep mid level trough over the region at the beginning of the period will develop into a closed low over the Appalachians.
Aloft, the trough will swing through the area during the afternoon. Tonight's lows won't be nearly as cold and tomorrow's highs will be even warmer than today's, despite additional cloud cover and the expectation of active weather.
Tonight, temperatures will settle into the low/mid 50s region-wide as wind speeds become light. Despite the anticipated FROPA, highs on Thursday will remain well above normal for this time of the year (around +10 to +15 degrees) ranging from the lower 80s in the vicinity of the Red River to near 90 degrees in the Hill Country.
400 PM MST Wed Apr 9 2025 Updated Aviation Unseasonably hot temperatures will impact the Desert Southwest through the rest of the week as strong high pressure builds over the region.
Warm and dry conditions will continue through Thursday under the influence of an upper-level ridge. Temperatures reached the upper 60s today in the Treasure Valley, and continued warming may push several locations across the Snake River Plain to near- record highs in the low 80s on Thursday.
High pressure will continue to hold over the region tonight and tomorrow with clear skies tonight, with a few strato-cu developing mainly over the interior Thursday afternoon. Seasonable temperatures on Thursday with highs in the lower to mid 80s, but continued comfortable conditions with low afternoon relative humidity values. A positively tilted trough axis is propagating across the Florida peninsula. As this clears out, high pressure is building back in at the surface. In response, a northerly wind continues to advect cooler and drier air back across the region. As the high slides farther east, the flow will start to veer to more of a NE direction and temps will start to climb in response.
733 PM EDT Wed Apr 9 2025 Dry weather is expected today and Thursday as a ridge of high pressure covers the Carolinas.
254 PM MST Wed Apr 9 2025 Unseasonably hot temperatures will impact the Desert Southwest through the rest of the week as strong high pressure builds over the region.
The better lift is also in this are with 850 mb warm air advection, frontogenesis, and some influence from the low level jet.
921 PM EDT Wed Apr 9 2025 Low pressure over the middle Mississippi River Valley will slowly move across the Ohio Valley tonight and Thursday. This will bring warmer temperatures and increased chances of precipitation. Cooler temperatures will follow to close the work week before a ridge of high pressure offers a warm up heading into the weekend. Warm front gradually lifts northward overnight through our fa. Eventually, saturation is lost in the lowest part of the DGZ, removing chances for any frozen pcpn. Southwesterly flow ahead of the low will lift temperatures into the upper 50s to middle 60s by afternoon. Late in the day, a sagging cold front will bring colder air into the CWA from north to south. Deep mid level trough over the region at the beginning of the period will develop into a closed low over the Appalachians.
The flow across the Keys remain northwest to north in wake of a relatively recent cold front passage. This is due to the combined effect of mainland day time heating, a high over the Gulf, and troughing over Florida and the Bahamas. The combination of earlier day time heating with ridging over the Gulf and troughing over Florida and the Bahamas has generated quite the spectrum of northwest to northerly breezes this evening.
1049 AM EDT Mon Sep 30 2024 Scattered shower activity will be present today associated with a low pressure system. For the day on Tuesday, cannot rule out some precipitation chances across the lower Scioto valley during the morning and into the afternoon hours. Cold front will be moving through the region at the start of the period.
A cold front will be moving SE towards the state on Tue. temps will be on the warmer side. but cooler for Tue night as drier/cooler air filters in behind the front as it moves into the state.
Between these two areas, it will generally be a rain-free day ahead with highs reaching the low to mid 90s this afternoon. Upper level ridging over the SW Atlantic. Temperatures today and tomorrow will likely be the highest for the week in the low to mid 90s.
1041 AM EDT Mon Sep 30 2024 Low pressure passes to the south as it tracks along a stalled boundary over the Mid Atlantic through Tuesday.
below normal temperatures and overall lighter winds are expected across Southwest through North Central Montana today in wake of a cold front; however, breezy and gusty winds will still be experienced through the afternoon hours across eastern portions of Central and North Central Montana (generally east of a Havre to Stanford line). By tonight, increasing cross barrier flow and a strengthening surface pressure gradient along the Rocky Mountain Front and Central Montana mountains will lead to increasing southwest to west surface winds at these locations, with breezy and gusty winds then overspreading all of Southwest through North Central Montana on Tuesday as a warm front lifts northeast and over the region.
- A cold front moves through the region tonight, bringing much cooler and drier air into the area for tomorrow.
- Well above average high temperatures today, sharply cooler with nearly normal Tuesday, and then above normal for the remainder of the forecast.
927 AM EDT Mon Sep 30 2024 High pressure over eastern Canada extending into New England will continue dry weather through mid week. Temperatures will run above normal today followed by cooler onshore flow Tuesday.
201 AM MST Mon Sep 30 2024 High pressure entrenched across much of the western United States will continue to promote dry and unseasonably hot conditions, with record heat likely persisting into the end of the week. Early morning atmospheric analysis reveals stubborn high pressure encompassing much of the Four Corners, while two areas of troughing flank the region. With ridging overhead, mostly dry and unseasonably hot temperatures will be the norm over the next several day and potentially into the upcoming weekend.
619 AM CDT Mon Sep 30 2024 - Critical fire weather conditions expected this afternoon in western and central MN as gusty winds and dry air will arrive following a cold front. - Cooler Tuesday with seasonable temperatures in the mid 60s. Lows are mainly in the 50s but warmer air is present in western MN where lows have only reached the low 60s. Area winds are expected to increase throughout today, turning more southerly this morning, as a trough arrives from the west. Along the Buffalo Ridge, gusts this morning could reach 35 mph as a strong southwesterly LLJ quickly passes overhead. Temperatures will rise quickly into the low to mid 80s this afternoon before a strong cold passes through from west to east. Highs are forecast to be much cooler in the low to mid 60s.
Yet another weaker trough axis trails southwest from this feature into central Tennessee and north central Mississippi. However, later in the day as that trough axis moves east, RH levels go up and would expect to see cloudy conditions filling in. Elsewhere, expect highs to be tempered by cloud cover a bit more, only reaching the lower to mid 70s.
- A cold front will surge through tonight, bringing notably cooler weather through Tuesday night.
405 AM MST Mon Sep 30 2024 Updated Aviation High pressure entrenched across much of the western United States will continue to promote dry and unseasonably hot conditions with record heat likely persisting into the end of the week. Early morning atmospheric analysis reveals stubborn high pressure encompassing much of the Four Corners, while two areas of troughing flank the region. With ridging overhead, mostly dry and unseasonably hot temperatures will be the norm over the next several day and potentially into the upcoming weekend.
Gusty offshore flow over the interior ridges will last through Tuesday. Ridging builds into the area as pressure heights indicate a warming trend through Tuesday with a warm deep- layer air-mass developing across the WRN CONUS.
629 AM CDT Mon Sep 30 2024 (Today through Tuesday) Upper trough this morning extended from Pennsylvania southwestward to Arkansas and east Texas, with a center of circulation in eastern Kentucky. Ridging was noted from the Four Corners region into Wisconsin. At the surface, high pressure extended from Bermuda into the northern Gulf of Mexico. Temperatures at 3 AM CDT generally ranged from the mid 60s to mid 70s, except at Lakefront Airport in New Orleans, where the warmer waters of Lake Pontchartrain were holding temperatures around 80. The upper low center over Kentucky will gradually open up and lift northeastward to off the New England coast by Tuesday evening, with the trough axis shifting eastward. With the lower levels remaining pretty dry (precipitable water 1.
Scattered shower activity will be present today associated with the low pressure system. For the day on Tuesday, cannot rule out some precipitation chances across the lower Scioto valley during the morning and into the afternoon hours. Cold front will be moving through the region at the start of the period.
1046 AM EDT Mon Sep 30 2024 High pressure across southeast Canada will bring fair weather with slightly above normal temperatures this afternoon through Tuesday.
739 AM EDT Mon Sep 30 2024 Upper level low pressure will drift slowly east from the Ohio Valley, pushing east of the area late Tuesday.
A weak high pressure ridge axis extends from the Atlc across the Treasure coast so expect a sea breeze to form first there and zipper up the coast. Max temps will again be above normal in the lower 90s and near record highs for many areas and peak heat indices of 102-107. Ridge axis over the west Atlantic begins to build back northward into the waters today.
633 AM CDT Mon Sep 30 2024 (Today through Tuesday) North to northwesterly flow aloft located in the upstream portion of an upper trough today, will become westerly Tuesday as the trough moves eastward and a broad ridge builds in over the Great Plains. Highs today and Tuesday from the low to upper 90s and tonight's lows will range from the mid 60s inland to the mid 70s along the coast.
638 AM CDT Mon Sep 30 2024 - A cold front will cross reach the tri-cities around midday.
A stronger cold front could arrive this weekend. Local forecast area continues to remain between remnant low of Helene and ridge in the vicinity of the Bahamas, but the upper low and its associated trough will become more positively tilted with a greater west to east component to the flow as it gradually weakens and shifts east dragging a weak front closer to the area today. Weakening low pressure from the surface through 500 mb centered across Tennessee is the remnant swirl of former Hurricane Helene. This feature should shift eastward and move off the North Carolina coast Tuesday afternoon, pushing a cold front southward across the area.
508 AM EDT Mon Sep 30 2024 An upper level low will drift northeastward from Kentucky to the Atlantic coast through Tuesday, keeping unsettled weather and near to just above normal temperatures.
630 AM CDT Mon Sep 30 2024 (Today through Tuesday) An elongated mid to upper-level trough extending from the Ohio River Valley into Southern Texas will gradually shift further east through the period. Weak 500mb ridging looks to build into the region by this afternoon. High temperatures today and Tuesday will be slightly above normal, in the low to mid 90s.
619 AM CDT Mon Sep 30 2024 (Today through Tuesday afternoon) Latest water vapor imagery indicates ridging maintaining its control just to the west of the region early this morning, with the trough over the eastern CONUS developing an increasingly negative tilt. The trough is progged to weaken somewhat over the next 24 to 48 hours, with the aforementioned ridge building eastward across the southern Plains in its wake. The only item of interest in the short term is a weak cold front that looks to move into the region beneath northerly flow aloft early Tuesday morning. However, emphasis is on the word "weak", with the only evidence of this front being a northeasterly to easterly wind shift, a few hours of breezy conditions, and slightly cooler afternoon temperatures.
625 AM EDT Mon Sep 30 2024 High pressure over eastern Canada extending into New England will continue dry weather through mid week. Temperatures will run above normal today followed by cooler onshore flow Tuesday.
653 AM EDT Mon Sep 30 2024 High pressure will remain over the area into early this week.
649 AM EDT Mon Sep 30 2024 Upper level low pressure will drift slowly east from the Ohio Valley, pushing east of the area late Tuesday.