Aikyam-Lab/Synoptic-Bench huggingface dataset:
Overnight lows will range from the L-M50s, with some normally cooler reaches of the interior possibly realizing U40s, and the immediate St. High pressure will continue to rule the local weather during this period. High pressure will continue to build over the state of Florida and the western Atlantic which will help usher in abnormally dry air with minimum relative humidity (RH) values dropping into the upper 20s to mid 30s this afternoon across the interior west of I-95. VFR conds continue with high pressure in firm control associated with a very dry airmass.
Upper ridging continues to move slowly into the area today while flattening out somewhat as the low level thermal ridge intensifies.
Though the low levels remain somewhat dry and this may be bolstered by mixing during the daytime, humidity will not fall as far as it did over the weekend.
613 AM EST Mon Feb 26 2024 (Today through Tuesday) Models depict deep and broad mid level high pressure/sfc ridging dominating across the E GOMEX and the Florida peninsula to start the work week. Meanwhile, a trough/low complex develops over the Great Lakes, but its associated sfc front will remain blocked and kept well to our by the aforementioned high. Robust subsidence associated with the high will ensure continuing dry conditions through the short term. By Tuesday, afternoon temps should reach the low-mid 80s in Several areas across SoFlo, with plenty of sunshine and no significant rain expected.
521 AM CST Mon Feb 26 2024 (Today and tonight) Water vapor imagery at 2 AM showed a semi-dirty upper ridge just east of the Four Corners ahead of a healthy plume of subtropical high clouds. At the surface, a weak trough axis had pushed to our east overnight but will redevelop west this afternoon in response to pressure falls from strong westerly flow eroding the upper ridge. This process will also result in a robust thermal ridge bisecting the CWA from SW-NE complete with record highs for Lubbock and Childress. NBM continues to lag the old school MOS with high temps, so highs today were shifted closer to the warmer MET numbers which depict Lubbock's first 90 degree day of the year.
High pressure centered over Florida is keeping a light and variable wind flow over the area this morning. High pressure will hold over the waters through the middle of the week with pleasant weather expected.
311 AM CST Mon Feb 26 2024 - There is a 40 percent chance for minor travel impacts early this morning near the international border from light snow and near the Highway 2 corridor from a light glaze of ice. Given this, will expand the SPS a bit further south to include portions of the Highway 2 corridor, but at this point think further headlines are not needed.
400 AM PST Mon Feb 26 2024 A trough of low pressure moving across region will bring a chance for showers over and west of the mountains today and Tuesday.
A couple of weather systems will move across Arizona through midweek delivering cooler temperatures, strong winds, and chances for precipitation. Warmer and drier conditions return for the second half of the week but are short lived as another system arrives over the weekend. The primary impact of the first trough and associated cold front will be wind. Otherwise, as the cold front sweeps across the area, additional moisture will be drawn northward.
- Slight chance for storms tonight with chances increasing for Tue night as a cold front surges through. At the surface, low pressure is situated over the Northern Plains with a broad area of return flow from the Great Lakes down into the Gulf Coast States. Feel the best chance for more widespread convection will be tied to the strong cold front set to move through Tue evening/overnight. Highs for both Wed and Thu will be around 20 degrees cooler than today and Tue. As we head into the weekend, another upper trough is expected to dig across the Western Conus which will bring another round of warm advection to the region for both Sat and Sun with highs in the 60s and low 70s.
907 AM PST Mon Feb 26 2024 A weakening low pressure system will produce periods of light showers this afternoon into Tuesday, as well as strong onshore winds across the mountains and desert slopes.
These warmer low temperatures will break previous records by several degrees.
1148 AM CST Mon Feb 26 2024 (Today and tonight) Water vapor imagery at 2 AM showed a semi-dirty upper ridge just east of the Four Corners ahead of a healthy plume of subtropical high clouds. At the surface, a weak trough axis had pushed to our east overnight but will redevelop west this afternoon in response to pressure falls from strong westerly flow eroding the upper ridge. This process will also result in a robust thermal ridge bisecting the CWA from SW-NE complete with record highs for Lubbock and Childress. NBM continues to lag the old school MOS with high temps, so highs today were shifted closer to the warmer MET numbers which depict Lubbock's first 90 degree day of the year.
Temperatures along the Island Chain are in the lower to mid 70s with dew points in the mid to upper 50s. Temperatures tonight are expected to remain warmer than last night as winds become more easterly. High pressure is expected to settle over the western North Atlantic tonight through mid week. The western periphery of this high will remain over the Keys for much of the week causing peaking and lulling east to southeasterly winds.
Winter weather will continue into the evening/overnight hours with breezy winds and dissipate overnight with cooler temperatures.
Temps will remain a bit cooler near the coast given the lower SSTs and a southerly component to the surface winds. High pressure to our east today will help low level dew points to begin to climb and a slight warming trend (overnight) is anticipated to develop with lows only dropping to near 60F areawide tonight.
For Tuesday, expect a repeat with hot temperatures due to a low level thermal ridge and downslope flow. However, more high clouds may keep highs a few degrees cooler.
Robust subsidence associated with the high will inhibit convection while also resulting in below average RHs through the period. In response to this synoptic scenario, the airmass over the state will begin to modify and allow for temps in the low-mid 80s across the region with plenty of sunshine and no significant rain expected.
Cold front is beginning to shift quickly south across MT and will enter the FA this evening as associated impulse lift brings increasing chances for snow. Splitting impulse will shift the main areas of lift northeast and southwest of the FA with the highest snow amounts in the FA expected to be in far NW SD and western Campbell county. Temps will surge into the 60s Thur and Fri, before a cold front settles into the region. A strong cold front will enter northeast WY/far northwest SD early this evening, then quickly through the rest of western SD overnight. A strong cold front will pass through the area this evening, with much colder air and increasing chances for snow.
Both of these remain correlated to a very tight pressure gradient across the region, as a deep trough and cold front begin to eject into the Midwest.
For Tuesday, expect a repeat with hot temperatures due to a low level thermal ridge and downslope flow. However, more high clouds may keep highs a few degrees cooler. The mid-level ridge that has been the dominant feature producing warm conditions in recent days should break down as a trough quickly sweeps into the country's mid-section.
Temperatures along the Island Chain are in the upper 60s to lower 70s with dew points in the lower to mid 50s. From synopsis, elongated high pressure off the Southeast coastline continues to slowly moves further east into the western North Atlantic this afternoon and tonight.
Locations with the best chance of reaching the lower 80s will be across the far southern and southeast counties as gradient winds really start to ramp up by Tuesday afternoon.
For Tuesday, any lingering fog is expected to dissipate by the mid- morning hours with partly cloudy skies and afternoon highs ranging from the low 70s along the coast to the upper 70s inland.
A return of more direct sun in formerly cloudy areas has helped to boost 2 PM temperatures into the lower 70s; warmer than normal highs this time of year of near 60 degrees.
With the southern jet stream producing strong zonal flow over the Southern Rocky Mountains, resulting leeside troughing and southerly flow has quickly warmed the Southern High Plains and central Gulf Coast regions. Where clouds break out fastest in the morning, temps could reach into the lower 80s by the afternoon.
With the axis of surface ridging pivoting further east into the western Atlantic waters, prevailing wind flow remains out of a light southeasterly direction across the region. Robust subsidence associated with the high will inhibit convection while also resulting in below average RHs through the period. In response to this synoptic scenario, the airmass over the state will begin to modify and allow for temps in the low-mid 80s across the region with plenty of sunshine and no significant rain expected.
Therefore, a winter weather advisory has been issued for the Lower Clark Fork region as snow showers will continue to bring periodic impacts to travel, particularly across Lookout Pass. The cold front has pushed through the Northern Rockie today leaving behind breezy conditions and widespread snow showers.
511 PM CST Mon Feb 26 2024 - A strong cold front will pass across southwest Kansas Tuesday, with high winds in its wake.
505 PM CST Mon Feb 26 2024 Latest WV imagery and UA analysis shows northwesterly flow and dry air in the midlevels aloft, downstream of modest ridging over northern Mexico and the southern Rockies. At the surface, high pressure was centered east of the area, with light south winds in place. As of 4 AM, temperatures were in the upper 50s to lower 60s with dewpoints ranging from the lower 50s to near 60.
(Tonight) Clouds continue to filter into the region ahead of an upper-trough that will pivot from the Central Plains into the Mid-Mississippi Valley and Ohio Valley overnight.
(Now through Tuesday) Warm and dry through the period as short wave upper level ridging dominates the area. Lows tonight will be much warmer as southerly flow continues to transport Gulf moisture northward across the area. Coastal locations will remain in the low 70s.
High pressure will remain over the area through the next several days, with no headlines expected.
No changes made to broader ongoing warnings and advisories, and we should be able to trim them back progressively into this eve as scheduled as everything settles down from NW to SE behind the cold front.
214 PM MST Mon Feb 26 2024 The robust cold front is pushing through the region right now. Rainfall is quickly changing to snowfall this afternoon as the cold front marches south. Actually the low temperature forecast for tonight was nudged down a bit more for central Valley and western Roosevelt Counties enough to warrant the expansion of the Wind Chill Advisory down into these areas.
Today, a mid-level trough begins to push into the the High Plains while at the sfc, low pressure digs into Texas. The low pressure interacting with high pressure over the eastern Gulf will continue to lead to a tightening pressure gradient bringing breezy conditions, especially in the Valley and along the coast. Additionally, tonight into tomorrow as the low continues to deepen, a low level jet will develop between 850 and 925 mb which will increase winds further later tonight into Tuesday morning, especially across the lower Valley.
The cold front has pushed through the Northern Rockie today leaving behind breezy conditions and widespread snow showers.
324 PM CST Mon Feb 26 2024 - A strong cold front will pass across southwest Kansas Tuesday, with high winds in its wake.
118 PM PST Mon Feb 26 2024 A weakening low pressure system will produce periods of light showers this afternoon into Tuesday, as well as strong onshore winds across the mountains and desert slopes.
Low-level southerly flow is currently moistening the low-level air mass.
Winds will remain elevated overnight with the pressure gradient increasing tomorrow as the low pushes east.
While the cold front has passed through our forecast area, some light snow showers persist.
Mostly cloudy skies but generally dry conditions will prevail across southeast Arizona along with cooler temperatures today.
Today, southwesterly flow will strengthen as a low pressure system intensifies near the Great Lakes.
It has been another quiet night across the Keys, albeit warmer than the past few nights with temperatures in the mid to upper 60s. A few interior locations on the larger islands have dropped into the lower 60s due to radiational cooling caused by the mostly clear skies and decoupled winds. A beautiful week of weather is on tap for the Florida Keys! High pressure in the western North Atlantic will slowly edge eastward, maintaining generally east to southeast breezes across the forecast area. Through the week, a low pressure system will slide eastward across the Great Lakes region, dragging a cold front across the Central and Southeastern U.
The high wind warnings for Humboldt county along with the northern portions of Lander and Eureka counties expired at 7PM. Winter weather will continue into the evening/overnight hours with breezy winds and dissipate overnight with cooler temperatures.
921 PM PST Mon Feb 26 2024 A weakening low pressure system will produce scattered light showers through Tuesday afternoon, as well as strong onshore winds across the mountains and desert slopes.
1136 PM CST Mon Feb 26 2024 - A strong cold front will pass across southwest Kansas Tuesday, with high winds in its wake.
1022 PM CST Mon Feb 26 2024 As of 9:15 PM CST tonight, temperatures are falling into the lower 70s under partly cloudy skies and southerly winds at 10-15 mph. Both of these remain correlated to a very tight pressure gradient across the region, as a deep trough and cold front begin to eject into the Midwest.
1105 PM CST Mon Feb 26 2024 (Tonight) Clouds continue to filter into the region ahead of an upper-trough that will pivot from the Central Plains into the Mid-Mississippi Valley and Ohio Valley overnight.
A broad trough across the region today combined with an increasing solar angle during the day will cause more showers. The trough is associated with colder temperatures aloft, and the increasing solar angle means we'll have more heating today, setting up unstable conditions. Throughout the day, a ridge will start to build over the region, causing a shallower unstable layer. The ridge building into the region is the result of a deep trough forming upstream over the eastern Pacific Ocean.
951 PM CST Mon Feb 26 2024 As of 9:15 PM CST tonight, temperatures are falling into the lower 70s under partly cloudy skies and southerly winds at 10-15 mph. Both of these remain correlated to a very tight pressure gradient across the region, as a deep trough and cold front begin to eject into the Midwest.
- Strong winds and much cooler temperatures to follow the cold frontal passage tonight. Location Today's Forecast Feb All-Time Record Springfield 80 78 (1930) Lincoln 78 76 (set yesterday) Peoria 77 77 (set yesterday) There is a cold front expected to move through overnight tonight that will bring severe thunderstorms, strong winds, a dramatic drop in temperatures, and potentially some snow showers. The storm mode for the evening/night-time hours looks to be linear as the cold front pushes through mainly focused over the southeastern counties of the CWA. After several nice/warm days, highs tomorrow only reach the low to mid 30s.
Cold front is beginning to shift quickly south across MT and will enter the FA this evening as associated impulse lift brings increasing chances for snow. Splitting impulse will shift the main areas of lift northeast and southwest of the FA with the highest snow amounts in the FA expected to be in far NW SD and western Campbell county. Temps will surge into the 60s Thur and Fri, before a cold front settles into the region. A strong cold front will quickly continue pushing through the area. A strong cold front will pass through the area this evening, with much colder air and increasing chances for snow.
Currently - Deep layered ridging is holding on to control of our area with the upper descending branch dipping southeastward into the Greater Antilles. A surface through lower level ridge extends from well east of the southeast coast, across Florida, and into the Gulf of Mexico. Winds may be weaker and a bit more variable over the modestly cooler gulf and bay side waters. This easterly flow will all but ensure a warmer and more humid night. A pressure ridge extending across Florida will maintain light to gentle northeast to easterly breezes on Keys waters through the overnight period. Winds may be a bit weaker and backed on the slightly cooler gulf and bay side waters.
This effect will be felt the least over the Coastal Prairies where clouds will hang around longer and hold maxes into the low to mid 80s.
A couple of weather systems will move across Arizona through midweek delivering cooler temperatures, strong winds, and chances for precipitation. Warmer and drier conditions return for the second half of the week, but are short-lived, as another storm arrives over the weekend. A trough in the northern stream will interact with what is left of the eastern Pacific moisture that moved into the region in the last 24 hours or so. This will continue overnight, with what remains of a cold front arriving in the early morning hours of Tuesday and moving eastward.
Models bring a cold front through the CWA during the day on Wednesday. The high res guidance is bringing a very narrow band of showers through with the front.
347 AM CST Tue Feb 27 2024 - A cold front moving across the area today will bring strong northerly winds gusting to 40 to 50 mph. - Today's cold front will also bring a small chance (20-30%) for snow with most locations expected to see only a dusting (a trace to a couple tenths of an inch) of snowfall accumulation this afternoon and evening. With a cold front beginning to move across the forecast area this morning, winds are expected to become northerly and increase in speed by daybreak today. High pressure will quickly move back in over the region so temperatures will rebound quickly, starting with Wednesday when highs recover to the 40s.
315 AM CST Tue Feb 27 2024 - Falling temperatures expected throughout the day behind a strong cold front. A strong cold front continues advancing southeast across the Dakotas and is expected to arrive in our far northern counties around 12z.
Northwest flow aloft today becomes zonal Wednesday as a potent upper trough passes north of the forecast area. A surface cold front will progress across the forecast area Wednesday afternoon into Wednesday evening. A broken band of showers and isolated thunderstorms can be expected along the cold front. Outside of rain/storm chances, gusty winds remain expected across the forecast area today into tonight owing to a strong pressure gradient developing between the high pressure system to our east and the developing low pressure area to our northwest. Overnight lows will bottom out in the lower to middle 60's, what would we typically expect for afternoon highs this time of year.
The pressure gradient will increase this afternoon as the next system begins to approach from the west, while high pressure remains to our east.
The cold front will begin reach the upper Delta area early Wednesday morning with a narrow band of gusty rain showers, but at this stage, thunder appears too unlikely to include in the forecast.
A strong cold front will cross the region Wednesday afternoon bringing with it more showers and storms, strong wind gusts, and much colder air. A strong cold front will cross Wednesday afternoon, increasing the risk for storms and strong wind gusts.
538 AM CST Tue Feb 27 2024 - A cold front moving across the area today will bring strong northerly winds gusting to 40 to 50 mph. - Today's cold front will also bring a small chance (20-30%) for snow with most locations expected to see only a dusting (a trace to a couple tenths of an inch) of snowfall accumulation this afternoon and evening. With a cold front beginning to move across the forecast area this morning, winds are expected to become northerly and increase in speed by daybreak today. High pressure will quickly move back in over the region so temperatures will rebound quickly, starting with Wednesday when highs recover to the 40s.
533 AM CST Tue Feb 27 2024 - Falling temperatures expected throughout the day behind a strong cold front. A strong cold front continues advancing southeast across the Dakotas and is expected to arrive in our far northern counties around 12z.
- Much cooler conditions expected tonight into Wednesday, before warmer conditions return. Highly changeable sensible weather is expected today as an intense cold front sweeps through the region. As of 09Z, surface cold front has moved south extending from central Minnesota through central Nebraska. This front is expected to surge south today as area of low pressure deepens along the front across southern Minnesota. Critical fire weather conditions may expand even farther north of this region today, but should be fairly short lived as strong cold front barrels south across the region this afternoon. Precipitation type will likely quickly transition from rain to snow as the lower portion of the troposphere rapidly cools.
438 AM MST Tue Feb 27 2024 Cold front has pushed through northeast Montana, with skies beginning to clear across the north, and winds slowly subsiding. Temperatures remain cold today as high pressure and upper trof moves across the region. Cold air will quickly be replaced on Wednesday with upper ridge moving across the western states.
This will result in surface winds turning more southerly across South FL, bringing in a warmer airmass, with high temps reaching the low to mid 80s under mostly sunny skies.
Cooler air settled in this morning behind a front tonight.
(Today and tonight) An even windier day is in the cards today ahead of an upper trough currently digging into the Four Corners. Immediately south of this trough is an already healthy subtropical jet with copious high clouds. As the base of the trough slides east today, an impressive kissing jet structure will unfold with 160 knots or more of flow at 300 mb and a 90-95 knot jet at 500 mb forecast to shift over the northern half of our forecast area by midday. Wind maxima of 70 knots at 700 mb and 35-45 knots at 850 mb still justify the High Wind Warning. Model soundings indicate high clouds won't be particularly thick/opaque today, so this along with above normal temperatures and a dry boundary layer should have little trouble tapping into the low level wind cores.
Short range models are rather split on the speed and extent to which we will lose this cloud cover into the afternoon, resulting in a disparate temperature spread from the low to upper 80s, depending on the solution in question. MVFR cigs are expected to redevelop late this evening across portions of Deep E TX and spread NNE across portions of extreme Ern TX into N LA/SCntrl AR overnight, ahead of a strong cold front that will quickly shift SE through the region after 06Z Wednesday.
- Cooler day on Wednesday with temperatures warming back up toward the weekend.
Drastic weather changes are on the way as a sharp cold front has begun to move into northwestern Missouri. This cold front will sweep through the forecast area this afternoon. High pressure will build into the area during the day tomorrow allowing winds to relax however, temperatures will remain cool with highs only in the mid 30s to lower 40s.
Temperatures along the Island Chain are in the lower to mid 70s with dew points in the upper 50s to lower 60s. Strong high pressure over the western North Atlantic extends west through Florida and into the Gulf of Mexico. From synopsis, high pressure over the western North Atlantic extends westward into Florida and the Gulf of Mexico. As this high settles further across the western North Atlantic tonight through Wednesday, breezes will freshen.