Aikyam-Lab/Synoptic-Bench huggingface dataset:
- Above normal temperatures may return to portions of South Florida towards the middle and the end of the week as mid level ridging strengthens over the region. High temperatures today expected in the low to mid 80s. As this weak boundary continues to dissipate over the area, surface flow will increase out of the northeast this afternoon while an upper level ridge becomes established over the Gulf through mid-week. Overall, high pressure and dry air dominate the weather regime making way for many sunny days this week, leaving me with not much to discuss. High temperatures will reach the low to mid 80s today and tomorrow.
1050 AM CST Tue Nov 18 2025 - Still a slight chance for a shower or thunderstorm in our far north with the warm front lifting away from our area. Moisture trapped beneath the overnight diurnal inversion will allow for patchy morning fog and low ceilings followed by near record high temperatures in the low to mid 80s. As heights begin to fall areawide ahead of the low, precipitation is forecast to increase in coverage beginning on Wednesday evening and continuing into the overnight hours.
-A potential for a wetting rain and cooler temperatures will arrive with a low pressure system set to impact the Panhandles starting Wed night into Thu. (This evening through Wednesday night) An upper level closed low can be seen on GOES water vapor imagery currently. The FA is currently under an area of flow that is transitioning from the southwest to quasi-zonal under and upper level ridge.
At the same time, the surface stationary front will slide slowly eastward into far western South Dakota as a warm front. By Wednesday morning, areas of fog look to be concentrated mainly over northwestern South Dakota, behind a weak cold front. The lingering morning fog and the cooler air behind the front will have an impact on temperatures, with warmer readings across southwestern and south central South Dakota.
259 PM EST Tue Nov 18 2025 Widespread precipitation continues over the region this evening, with the highest rainfall totals expected near and south of the Ohio River. An unsettled pattern continues for the remainder of the week, with several chances for rain with temperatures slowly trending warmer. Deep southwesterly flow continues to provide above normal moisture to the region through the first portion of the night before the trough finally moves through into Wednesday morning. Otherwise, throughout the rest of the night, the low pressure drops to the south of the region. Drier conditions are anticipated for Wednesday and Wednesday night as mid-level ridging builds in over the region. Cloud cover continues into the overnight so low temperatures are not able to drop too far despite the cooler air mass provided by the high pressure.
The upper low is centered near southern California this afternoon, with plentiful moisture continuing to push northward into Arizona.
Moisture trapped beneath the overnight diurnal inversion will allow for patchy morning fog and low ceilings followed by near record high temperatures in the low to mid 80s. As heights begin to fall areawide ahead of the low, precipitation is forecast to increase in coverage beginning on Wednesday evening and continuing into the overnight hours.
- Cooler temperatures but still above climatic normals for the time of year through the period. With less cloud cover overhead tonight, overnight lows will run several degrees cooler tonight with widespread 20s and 30s areawide. Temperatures will remain on the warmer side of normal by around 5 degrees. Two areas of low pressure, one to our north and one to our south, will bring weak troughing through Eastern Idaho and some isolated showery activity, but any rain chance remains low enough to keep out of the TAFs for now.
This system stems from a positively tilted barotropic upper level low moving along the southern Great Lakes. Expect a mix of snow/rain/drizzle/sleet as temperatures continue to drop behind the low this evening. The above mentioned wave will shift through the Mid Atlantic as high pressure with drier air moves over the Great Lakes Region late tonight, into Wednesday. Wednesday morning temps will range from the upper teens along US 10 to the low 30s along the I 94 corridor.
This will bring rain to the area as warmer air moves in with a warm front tonight.
115 PM EST Tue Nov 18 2025 Widespread precipitation continues over the region this evening, with the highest rainfall totals expected near and south of the Ohio River. An unsettled pattern continues for the remainder of the week, with several chances for rain with temperatures slowly trending warmer. Deep southwesterly flow continues to provide above normal moisture to the region through the first portion of the night before the trough finally moves through into Wednesday morning. Otherwise, throughout the rest of the night, the low pressure drops to the south of the region. Drier conditions are anticipated for Wednesday and Wednesday night as mid-level ridging builds in over the region. Cloud cover continues into the overnight so low temperatures are not able to drop too far despite the cooler air mass provided by the high pressure.
Snow showers have tapered off as high pressure begins to move into the region.
Weak flow aloft with water vapor imagery revealing a weakening cut off low over the Midwest, broad upper ridging over the Northern Plains into central Canada, as well as a well established cut off low off of the California coast.
- Mild temperatures in the low to mid 60s returns for Wednesday.
121 PM EST Tue Nov 18 2025 Departing high pressure will lead to warming temperatures through the remainder of the week. A weak cold front will pass through the area Wednesday but will bring little other than clouds to the area. H5 ridging across the Deep South with zonal flow to the north will keep things dry in the short term for this part of the Carolinas.
Today-Tuesday: Near Normal or Slightly Above Normal Temperatures, Mostly Dry with Some Low Precipitation Chances (15 to 20%) This Week: The main band of rain/snow continues to dwindle as an upper level low continues to make its way across southern Wisconsin. With the low clouds hanging around through Wednesday though, light rain or drizzle will be possible as there will be deep enough saturation and enough lift for this to occur.
1227 PM EST Tue Nov 18 2025 An area of low pressure moves through PA into the Mid Atlantic tonight bringing some light snow to NEPA with up to an inch of accumulation at higher elevations.
Water vapor imagery early this morning shows the upper low we've been tracking beginning to shear out, becoming increasingly east-west elongated. Guidance continues to suggest this upper low will devolve into an open wave and gradually weaken as it moves across northern IL this afternoon.
With high pressure building in and plenty of low-level moisture, we expect areas of fog and low clouds to redevelop this evening and fill in again overnight into Wednesday morning. The extensive clouds for the interior westside valleys also has resulted in relatively warmer temperatures compared to the higher elevations where overnight lows were colder due to no cloud cover. This will be enough to keep temperatures from dropping near or below freezing as the cloud layer and fog will slow down the amount of cooling tonight.
There was some light snow and sleet this morning but with above freezing temperatures during the day impacts were minimal. Short wave trough over IL will accelerate east tonight in confluent upper flow and gradually weaken as it reaches the forecast area toward midnight. KEY MESSAGES: - Dry and quieter weather - Temperatures to moderate back towards normal ---------------------------------------------------------------- High pressure builds at the surface over the Great Lakes as 500 mb heights build about 80 meters.
1125 AM CST Tue Nov 18 2025 Updated at 1124 AM CST Tue Nov 18 2025 - An upper-level storm system brings increasing rain chances and much cooler temperatures by the middle of the week. - A few storms could be severe Wednesday night, from the Western Low Rolling Plains to the lower Trans Pecos.
1247 PM EST Tue Nov 18 2025 Dry high pressure is expected to prevail across the area through the week. A cold front is expected to move through this weekend. At the surface, weak coastal trough axis remains off the coast this afternoon, pushing inland quickly this evening in response to high pressure sliding off the Mid-Atlantic coast. At the surface, high pressure will be present across the Southeast with deep layer subsidence ushering us into a period of well above normal temps.
Warm and dry conditions prevail through much of the week as a upper level ridge builds over the region. At the sfc, high pressure will remain in control with southeasterly to southerly flow bringing increased moisture to the area. Temperatures will remain above normal through the period, likely flirting with a few record highs by midweek as an upper ridge builds across the area.
An extensive area of fog/stratus extends across SE Oregon and the lower Snake Plain of SW Idaho this morning. Expect fog stratus to reform tonight across portions of SE Oregon and through most of the lower Snake Plain (Twin to Ontario).
- Temperatures continue to nudge above normal as high pressure stays in control.
The extensive clouds for the interior westside valleys also has resulted in relatively warmer temperatures compared to the higher elevations where overnight lows were colder due to no cloud cover. This will be enough to keep temperatures from dropping near or below freezing as the cloud layer and fog will slow down the amount of cooling tonight.
950 PM EST Tue Nov 18 2025 An area of low pressure moves through PA into the Mid Atlantic tonight bringing some light snow to NE PA with up to an inch of accumulation at higher elevations.
Some scattered low level clouds are streaming towards the coast and just onshore at times thanks to the coastal trough, but otherwise a mostly sunny and mild rest of the day will be expected with highs in the upper 70s to low 80s inland. The more onshore flow will keep conditions a bit cooler near the coast as highs stay in the low to mid 70s range.
436 PM MST Tue Nov 18 2025 - Isolated light snow for the southwest mountains through the short term, while the eastern mountains and plains remain dry and warmer than normal.
Fog and freezing fog may form overnight in valley locations.
636 PM EST Tue Nov 18 2025 Departing high pressure will lead to warming temperatures through the remainder of the week. A weak cold front will pass through the area Wednesday but will bring little other than clouds to the area. H5 ridging across the Deep South with zonal flow to the north will keep things dry in the short term for this part of the Carolinas.
506 PM CST Tue Nov 18 2025 -A potential for a wetting rain and cooler temperatures will arrive with a low pressure system set to impact the Panhandles starting Wed night into Thu. (This evening through Wednesday night) An upper level closed low can be seen on GOES water vapor imagery currently. The FA is currently under an area of flow that is transitioning from the southwest to quasi-zonal under and upper level ridge.
316 PM MST Tue Nov 18 2025 A low pressure system will cross the region over the next several days and bring cooler temperatures, chances for precipitation including snowfall above 7000 feet, and breezy conditions.
Low stratus has hung around longer than anticipated in the northern Nebraska panhandle and as a result, temperatures are cooler than originally forecast. Any accumulations will be light as synoptic forcing remains weak under the upper-level ridge. Ridging will still be in place during the day Wednesday, leading to another mild day across the forecast area. Temperatures will be a bit warmer on Wednesday, with highs about 10 degrees above average for most locations. A few weak disturbances moving through the ridge aloft could spark some showers during the day for locations out west as well. Southwest flow is still expected so orographically induced snow showers will be possible in the high terrain. With help from forcing from a potent trough just to the west of the CWA, showers could move into the high plains per the HRRR.
637 PM EST Tue Nov 18 2025 Widespread precipitation will continue across the region this evening, with the highest rainfall totals expected near and south of the Ohio River. An unsettled pattern continues for the remainder of the week, with several chances for rain with temperatures slowly trending warmer. Deep southwesterly flow continues to provide above normal moisture to the region through the first portion of the night before the trough finally moves through into Wednesday morning. Otherwise, throughout the rest of the night, the low pressure drops to the south of the region. Drier conditions are anticipated for Wednesday and Wednesday night as mid-level ridging builds in over the region. Cloud cover continues into the overnight so low temperatures are not able to drop too far despite the cooler air mass provided by the high pressure.
202 PM MST Tue Nov 18 2025 - Isolated light snow for the southwest mountains through the short term, while the eastern mountains and plains remain dry and warmer than normal.
754 PM EST Tue Nov 18 2025 Departing high pressure will lead to warming temperatures through the remainder of the week. A weak cold front will pass through the area Wednesday but will bring little other than clouds to the area. H5 ridging across the Deep South with zonal flow to the north will keep things dry in the short term for this part of the Carolinas.
Cold overnight temperatures with patchy fog/freezing fog 3.
704 PM EST Tue Nov 18 2025 Dry high pressure is expected to prevail across the area through the week. A cold front is expected to move through this weekend. At the surface, a weak coastal should push inland quickly this evening in response to high pressure sliding off the Mid-Atlantic coast. There is a 30-40% chance along much of the Highway 17 corridor near and south of Charleston for at least patchy dense fog overnight, and a Dense Fog Advisory or Special Weather Statement could eventually be needed, including for locations around the Savannah Metro around daybreak Wednesday. At the surface, high pressure will be present across the Southeast with deep layer subsidence ushering us into a period of well above normal temps.
Temperatures will be cooler, but still be above normal through the week. Tuesday night through Wednesday: The Inland Northwest is under the influence of a weak upper-level trough this afternoon. This has primarily resulted in an increase in extensive clouds, but as the cold pool associated with the upper-level trough moves east of the Cascades, there is a 10-15% chance for light rain across the lowlands and a 20-30% chance for light snow in the mountains. On Wednesday, models are in good agreement for a transient upper- level ridge to move into the Inland Northwest as upper- level trough associated with a low in the Gulf of Alaska approaches the western US. Mid level drying and subsidence associated with the ridge will decrease cloud cover Wednesday morning. Despite the ridging, mixing will be limited, keeping winds light and preventing significant warming.
616 PM EST Tue Nov 18 2025 An area of low pressure moves through PA into the Mid Atlantic tonight bringing some light snow to NEPA with up to an inch of accumulation at higher elevations.
- Potentially wetting rains and cooler temperatures will arrive to the Panhandles starting Wed night through Thu.
205 AM EST Wed Nov 19 2025 - An area of low pressure and its trailing cold front will track through the Ohio Valley and bring widespread rain chances to the region early this morning. Increasing mid-level geopotential heights this morning through tonight with near-surface weak cold advection and a moist air mass behind a weak cold front will mean widespread low stratus with fog development this morning, with widespread stratus that is expected to persist through much if not all of the daytime hours and into the nighttime hours tonight.
134 AM EST Wed Nov 19 2025 High pressure builds into the region, bringing a brief period of dry weather on Wednesday.
1256 AM EST Wed Nov 19 2025 Dry high pressure is expected to prevail across the area through the week. A cold front is expected to move through this weekend. Today and Tonight: The mid-levels will consist of weak ridging building over the Southern MS Valley. At the surface, High pressure will prevail across our area, while a front is located to our north. The High will bring our area dry conditions with passing clouds. Highs will peak in the upper 70s to lower 80s, except cooler at the beaches.
- Expect patchy fog over the Prairie Coteau, the higher elevated of northeastern SD, through mid morning. The lowest visibility will be near sunrise.
-Thick cloud cover from a weak low pressure system south of Cuba will linger through the overnight and dissipate on Wednesday. From synopsis, high pressure located over the eastern CONUS will slowly move into the western Atlantic tonight. The high will then slowly build and support freshening northeast to east breezes during the work week. Although the high will wax and wane at times, expect generally gentle to moderate breezes with occasional moderate to fresh breezes south of the island chain.
An upper ridge stretching north over the eastern Conus will build as an upper trough digs over the western Conus through mid week. Energy from the western upper trough ejects, flowing through the flow over the eastern upper ridge, helping to deamplify the ridge. The ridge keeps the bulk of the energy north of the forecast area into the coming weekend, though.
1023 PM MST Tue Nov 18 2025 - Isolated light snow for the southwest mountains through the short term, while the eastern mountains and plains remain dry and warmer than normal.
A slow-moving trough is steering a band of mid- to-high clouds over E-Central OR and into the area, with patchy fog and areas of stratus ahead of it, and expected to continue over SW ID and SE OR through Wednesday morning and early afternoon.
331 AM EST Wed Nov 19 2025 Low pressure to our south this morning gives way to high pressure building in from the west for the rest of the day.
1244 AM EST Wed Nov 19 2025 An area of low pressure moves through PA into the Mid Atlantic tonight bringing some light snow to NE PA with up to an inch of accumulation at higher elevations.
118 AM EST Wed Nov 19 2025 Low pressure to our south this morning gives way to high pressure building in from the west for the rest of the day.
110 AM CST Wed Nov 19 2025 - Areas of dense fog this morning in Western Wisconsin, with below freezing temperatures this freezing fog could lead to slick spots on untreated roads and surfaces. With the cool temperatures this is a freezing fog which could lead to slick spots on untreated roads and surfaces this morning. Farther to the west over Minnesota cloud cover is keeping temperatures warmer and dense fog is not expected. With temperatures above freezing during the day, when drizzle is most likely to occur, no impacts are expected.
128 AM CST Wed Nov 19 2025 - Areas of dense fog this morning in Western Wisconsin, with below freezing temperatures this freezing fog could lead to slick spots on untreated roads and surfaces. With the cool temperatures this is a freezing fog which could lead to slick spots on untreated roads and surfaces this morning. Farther to the west over Minnesota cloud cover is keeping temperatures warmer and dense fog is not expected. With temperatures staying above freezing tonight no impacts are expected.
These clouds will continue moving east with clearing behind as high pressure moves into the region. Cold overnight temperatures with patchy fog/freezing fog 3.
In the upper levels, a broad ridge axis will slowly shift east across the Gulf waters through the rest of the week and into the weekend, while at the surface, the sub-tropical ridge axis extends from the open Atlantic across northern Florida and into the northeastern Gulf. With ridging both at the surface and aloft, high temperatures will run about 5-10 degrees above normal for November, topping out in the low to mid 80s each day.
- Warmer than normal temperatures continue. By Wednesday afternoon, the upper low begins shifting east across the Desert Southwest and northern Mexico, providing enough large-scale ascent to support isolated to scattered showers across portions of the region.
514 AM CST Wed Nov 19 2025 - Potentially wetting rains and cooler temperatures will arrive to the Panhandles starting Wed night through Thu. (Tonight through Thursday night) Moisture is (knock knock) knocking on the Panhandles' door today, gradually streaming in ahead of the approaching closed low currently passing over southern California. The first wave of energy ahead of the low should get to the Panhandles later this morning and afternoon, and may be enough to generate some scattered light showers, with perhaps a few weak storms over eastern counties based on recent CAM runs (15-30% POPs).
Most models and recent model runs favor a more northern track that would keep the highest impacts in Canada, though a more southern track that could produce winter weather impacts over the state definitely remains plausible as well.
Skies are clearing across much of the forecast area early this morning as a ridge of high pressure accompanied by cold and dry air slides into the PacNW. Could see patchy fog develop across some of our usual fog-prone areas along river valleys, but given the lack of a temperature inversion present across obs, thinking is that this morning will just be cold, with much of the forecast area seeing below-freezing temps. The trajectory of this system is not favorable for widespread precip, so as of now, the forecast for late Wednesday into Thursday looks to be that of light mountain snow generally less than an inch above primarily 4500-5000 ft, with perhaps a stray shower impacting the Basin (15-30%) via wraparound moisture from the low as it digs to our south.
529 AM EST Wed Nov 19 2025 High pressure builds into the region, bringing a brief period of dry weather on Wednesday. Temperatures trend warmer and remain slight above average through the remainder of the week. Clouds may lift slightly during the afternoon hours, but high pressure in control resulting in very weak flow and the low-level inversion lingering will keep a thick blanket of low level clouds across the region Wednesday. Temperatures trend slightly cooler than the blended guidance and only rise to the upper 40s/ low 50s.
Temperatures remain at or slightly above normal today with highs in the low to mid 40s west of the Divide and low to mid 50s east of the Divide. The highest elevation mountain ranges of western WY may see a light coating or at most an inch or two of fresh snowfall by this time. This is due to two upper level lows managing to navigate their way around the area, which seems to be the theme of November so far.
624 AM EST Wed Nov 19 2025 Dry high pressure is expected to prevail across the area through the week. A cold front is expected to move through this weekend. The mid-levels will consist of weak ridging building over the Southern MS Valley. At the surface, High pressure will prevail across our area, while a front is located to our north. The High will bring our area dry conditions with passing clouds. Highs will peak in the upper 70s to lower 80s, except cooler at the beaches.
551 AM CST Wed Nov 19 2025 - Areas of dense fog this morning in Western Wisconsin, with below freezing temperatures this freezing fog could lead to slick spots on untreated roads and surfaces. With the cool temperatures this is a freezing fog which could lead to slick spots on untreated roads and surfaces this morning. Farther to the west over Minnesota cloud cover is keeping temperatures warmer and dense fog is not expected. With temperatures staying above freezing tonight no impacts are expected.
659 AM EST Wed Nov 19 2025 Low pressure to our south this morning gives way to high pressure building in from the west for the rest of the day.