Aikyam-Lab/Synoptic-Bench huggingface dataset:
(Issued 917 AM CST Wed Dec 20 2023) Mostly sunny skies are expected for the majority of the daytime hours today under high pressure. High to mid-level clouds are progged to return overnight and could result in overnight temps ending up a few degrees warmer than the current forecast, but thinking there will be enough clear pockets to still drop temps into the upper 20s to low 30s. The two areas of high pressure will eventually merge with each other over the eastern Great Lakes and then gradually shift eastward on Thursday resulting in similar conditions to today.
325 PM EST Wed Dec 20 2023 High pressure will build into the region tonight and last through the remainder of the week.
1241 PM EST Wed Dec 20 2023 High pressure will dominate through much of the rest of this week, leading to fair weather.
With continuing light south/SSW low level flow tonight and increasing sky coverage overhead, will go a few degrees warmer than last night's lows for min temps tonight, though still on the cool side of the guidance envelope. This results in lows in the upper 20s to around 30 and cooler in the valleys. We can expect another warmer than normal day tomorrow with highs in the lower and middle 50s.
As temperatures fall below freezing, the fog may begin to deposit a light glaze on elevated and exposed surfaces. Temperatures will be impacted in those areas with highs struggling to reach the lower 50s, but further north and west may see some upper 50s.
319 PM EST Wed Dec 20 2023 High pressure will prevail through the rest of the week. Tonight: Overall, the setup will be nearly identical to last night with high pressure centered along the Appalachians. Lows should be similar but just a degree or two warmer.
With southerly winds and sunshine, expect warmer conditions today. The clouds and southerly winds will also make for warmer overnight conditions, as lows will range from the mid 30s in our eastern zones, to mid 40s across East Texas.
For the remainder of the daytime period, the cloud cover will hold on, though some breaks will be possible late this afternoon across southeast Oklahoma as the low clouds lift and the back edge of the high level moisture exits. Winds will remain gusty through the afternoon with a slight drop off as the low level jet weakens some.
The afternoon surface analysis shows high pressure cresting just to our south and east, with southeast flow noted. This high pressure will remain just to the east tonight, and mid-level ridging will remain as well. This could hinder valley temperature drop-offs, but we will still see overnight lows in the low to mid-20s in the deeper sheltered valleys and mid-20s to near 30 on the ridges. Given the mid-level cloud potential showing up the HREF ensemble, would suspect we will see even more muddled ridge/valley temperature splits, with the overall upper 20s in the valleys and lower 30s on the ridges.
1106 AM CST Wed Dec 20 2023 (Today and tonight) A short wave trough was currently over the area early this morning bringing mid and high level cloud cover. As this initial short wave moves northeast of the area later this morning, weak short wave ridging and subsidence will take its place. However, the next short wave trough will approach from the same region this evening. Overnight temperatures tonight will be warmer with the increase in low level moisture.
249 PM EST Wed Dec 20 2023 Cool high pressure will maintain below normal temperatures through Thursday night.
(Tonight through Thursday night) The upper level ridge will continue to be a major player in the weather for Deep South Texas and the Rio Grande Valley. As for the temperatures, starting off with the low temperatures first. Tonight, expecting mostly upper 50s for the region, however, there are some areas such as the Lower Rio Grande Valley, McAllen, and Rio Grande City that could be in the lower 60s. Then on Thursday night, the low temperatures are expected to be in the lower 60s with the Lower Rio Grande being in the mid 60s. Wrapping up on the highs for tomorrow.
Depending on the outcome of the next pair of potential weather systems, cooler temperatures could make a come back after their departure.
(Rest of today through Thursday) A ridge of high pressure is gradually settling over the southeastern US, which will shift the winds northeasterly today and initiate a slight warming trend through the short term period. The afternoon highs will be in the low to mid 70s across South Florida, with overnight lows trending warmer into the upper 50s to mid-60s.
Upper ridge axis across the Mississippi Valley. A strong Canadian high pressure area will remain across the area. Although there will be high clouds spilling over the ridge and approaching from the Deep South, these clouds will probably be thin. So, expect strong radiational cooling conditions with the ridge across the area. Went with the 10th percentile NBM guidance for overnight low temperatures in line with local radiation guidance, perhaps a couple degrees warmer than last night. So, mainly lows in the mid 20s although sheltered locations could be in the low 20s.
Upper ridge axis across the Mississippi Valley. A strong Canadian high pressure area will remain across the area. Although there will be high clouds spilling over the ridge and approaching from the Deep South, these clouds will probably be thin. So, expect strong radiational cooling conditions with the ridge across the area. Went with the 10th percentile NBM guidance for overnight low temperatures in line with local radiation guidance, perhaps a couple degrees warmer than last night. So, mainly lows in the mid 20s although sheltered locations could be in the low 20s. Weak ridging will allow daytime temperatures to warm to near normal levels.
1213 PM EST Wed Dec 20 2023 Dry high pressure lingers over the region into the weekend and provides slightly above normal temperatures.
1219 PM EST Wed Dec 20 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds into and over the local area.
Temperatures are slowly warming above freezing and should continue to climb into the 40s and lower 50s with still a dry airmass across the east Tennessee Valley. Winds are light and should stay light through the day as high pressure stays in control. Model soundings show a pretty stark low level inversion, so the mid slope regions will definitely be warmer than the valley.
1126 AM CST Wed Dec 20 2023 Key Messages: * No impactful weather is expected during the short-term period Discussion: Early-morning GOES-17 water vapor imagery depicts a wound-up and seemingly cut-off low pressure system off the northern coast of California between the Polar jet racing into British Colombia and the subtropical jet arcing toward the southwestern United States. With temperatures running some 10 degrees warmer this morning compared to yesterday morning, high temperatures today will be similarly 10 degrees warmer and in the low to mid 40s. Tomorrow will be decidedly cloudy and marked by temperatures in the low to mid 40s. As a subtle upper-level low-amplitude short- wavelength trough currently located near the Four Corners region approaches the Great Lakes Thursday afternoon, cloud depths will grow and become sufficiently deep to support a few spits of sprinkles, particularly by sunset.
Given this wind shift, temperatures were able to climb to the lower 70s at most island communities today.
1110 AM EST Wed Dec 20 2023 High pressure building into our area will allow for dry conditions that will last through the rest of the week.
Areas west of I-55 likely remain in the lower and mid 30s F as those areas remain a bit further from the core of the colder air to the east while areas east of I-55 likely fall into the upper 20s F. Tomorrow, temperatures will be similar to what we are seeing today, near 60 F north of I-20 to the lower/middle 60s F south. For the longer term outlook, a northern stream upper wave currently over the Gulf of Alaska will interact with an upper low currently off the coast of Northwest California.
We continue to monitor temperature trends with some risk for highs coming in a bit cooler than forecast due to persistent high clouds. We should still see enough sun today to help send temperatures well into the 50s to lower 60s, and most guidance show a window of clearer skies tonight that will allow temperatures to fall below freezing for much of the area east of the Delta region.
Highs tomorrow will be slightly warmer, in the mid 50s, with more cloud cover.
Thus NBM still shows light accumulations going over the higher elevations through the day, amounting to still less than 2" even at the peaks of the Divide. The rest of the area trends drier under the influence of weak ridging between the two features.
Easterly low level flow related to that high will become established in the wake of a southward moving cold front/wind shift tonight into Thursday. Can't totally rule out some flurries or light drizzle/freezing drizzle falling from that shallow cloud deck in the ne corner of the CWFA but confidence in that happening is low and not expecting any impacts at this time.
233 PM EST Wed Dec 20 2023 High pressure will remain in control through the end of the week. A dry cold front dissipates over the area on Thursday before high pressure returns into the holiday weekend. A weak cold front quickly decays as it crosses the area tomorrow, with the only notice of its passage being a brief increase in northerly winds gusting up to 15 mph. Otherwise, high pressure expected to dominate the weather across the region, keeping conditions seasonal and dry.
(Today and tonight) An mid/upper level low pressure system is position approximately 350 miles west of San Francisco early this morning. Rain will tapper off from north to south as we head into tonight as the mid/upper level low slides southward down the coast.
Low level flow will be out the northeast Wednesday, and as the high moves slowly east, flow will transition to out of the east by Wednesday night, and then out of the southeast by Thursday afternoon.
318 PM EST Wed Dec 20 2023 High pressure will build into the region tonight and last through the remainder of the week.
355 PM EST Wed Dec 20 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds into and over the local area.
(Tonight) With high pressure centering over the southern Appalachians, a return to southeasterly flow has resulted in a slight warm up from what we saw yesterday, with afternoon temps reaching the low to mid 50s. With light winds and clearing skies, will be a good night for radiational cooling, with lows falling near or just below freezing.
307 PM EST Wed Dec 20 2023 High pressure will be in control through Thursday night.
220 PM EST Wed Dec 20 2023 (This afternoon through Thursday) High pressure will continue over the area through the short term with scattered to broken high clouds. The main forecast challenge will be the effect of the high cloudiness on nighttime low temperatures the next 2 nights. Regardless, almost all locations are expected to dip back below freezing, with pockets of mid 20s (perhaps a bit lower).
From synopsis, high pressure will continue to slide towards the Eastern Seaboard this afternoon. As the area of high pressure weakens slightly and slides northeastward late in the week through the weekend, breezes will modestly slacken and slowly veer to the east to southeast.
- Another dry day Latest surface analysis shows a weak cold front moving south over the UP and will move across the cwa later today.
1114 AM EST Wed Dec 20 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds into and over the local area.
For this evening, the Great Lakes region is wedged between the ridge of high pressure over the Appalachia and high pressure over Ontario, which will strengthen this evening given support from the confluent flow aloft. An elevated warm front will sneak into portions of southern Michigan this evening while a backdoor weak cold front fills in over the Thumb and Tri-Cities overnight, both which will support the chance for overcast stratus cover. The cold front will have a very low (10%) chance for drizzle, along the weak convergence zone, but limited moisture depths is an inhibiting factor. The southwest periphery of the Canadian high pressure system will extend into the Great Lakes on Thursday, supporting another round of dry weather highs pushing into the upper 30s to lower 40s.
1155 AM CST Wed Dec 20 2023 (Today through Thursday) An upper level ridge over eastern Texas will continue to strengthen today. At the surface, a broad high pressure system over the southeastern US will continue to support light southeasterly winds over Deep South Texas. High temperatures are expected to be slightly warmer, in the mid to upper 70s today and Thursday, thanks to a combination of warm air advecting on the southeasterly winds and and a slight reduction in cloud cover today.
1113 AM CST Wed Dec 20 2023 Seasonally cool and dry conditions will prevail for the next several days as high pressure dominates much of the eastern U. By the end of the week, a slow moving cold front will approach, marking the start of a wet and unsettled holiday weekend.
1223 PM EST Wed Dec 20 2023 High pressure building into our area will allow for dry conditions that will last through the rest of the week.
This will result in a slight warmup today despite the increase in clouds, with afternoon highs making it into the low to mid 50s.
Think this may affect lows again tonight with variable high clouds moving through the upper ridge. Have brought lows up a couple degrees above the MET/MAV guidance with most areas in the lower to mid 20s. slightly warmer at Chattanooga. Again tonight midslope temperatures will be warmer than the valleys with a low level inversion. Lows in the midslope areas are expected to be in the lower to mid 30s. Highs a little warmer in the lower to mid 50s.
A weak cold front will push to the Ohio Michigan state line before beginning to lift back northward on Thursday as a warm front. Already light winds further weak through the day as this high is loses cohesion as a result of interaction with a stronger anticyclone rapidly building across northern Ontario/Quebec. A weak backdoor cold front will drop across SE MI late this evening into tonight as a result of the this secondary high building over the Great Lakes.
Latest hi-res and 12Z model guidance do have a range of rainfall coverage for tomorrow, thanks in part to the H700 trough axis advecting the better moisture profiles.
238 PM EST Wed Dec 20 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds into and over the local area.
912 PM EST Wed Dec 20 2023 Cool high pressure will maintain below normal temperatures through Thursday night.
117 PM PST Wed Dec 20 2023 A low pressure system will be responsible for periods of rain, as well as high elevation snow in the Sierra Nevada into the end of the week.
Thereafter, upper-level ridging returns, resulting in a rebound of warmer and drier conditions through the remainder of December.
High pressure remains in place over the area with some thin high clouds over the CSRA.
631 PM EST Wed Dec 20 2023 High pressure will be in place across the region today into tomorrow, with mild temperatures expected through the weekend.
650 PM EST Wed Dec 20 2023 High pressure will be in control through Thursday night.
(Tonight) With high pressure at the sfc anchored over the Appalachians this evening, light ESE flow continues across the CWFA. Current temps range from the lower 30s in sheltered valley locations in NE AL/Srn Middle TN, while elsewhere, temps have just dipped into the upper 30s in Srn portions of the CWFA.
A moist atmosphere along with a low pressure system off the coast for California will keep much of Nevada under cloud cover along with a few light valley rain and mountain snow showers mainly across central Nevada through the next couple of days.
940 PM EST Wed Dec 20 2023 High pressure will be in control through Thursday night.
A dry cold front brings cooler temperatures and slight chances for snow to areas near the OR border. The closed low rotating off the coast of central California this morning will continue tracking southward today. Current satellite and radar imagery depicts precipitation bands wrapping around the low center into the Central Valley, with some light showers approaching the southern Sierra crest.
838 PM EST Wed Dec 20 2023 The forecast looks on track this evening with high pressure over the region providing quiet weather. With continuing light south/SSW low level flow tonight and increasing sky coverage overhead, will go a few degrees warmer than last night's lows for min temps tonight, though still on the cool side of the guidance envelope. This results in lows in the upper 20s to around 30 and cooler in the valleys. We can expect another warmer than normal day tomorrow with highs in the lower and middle 50s.
923 PM EST Wed Dec 20 2023 High pressure will remain in control through the end of the week. A dry cold front dissipates over the area on Thursday before high pressure returns into the holiday weekend. High pressure remains overnight tonight, with mostly clear skies expected and light winds. A weak cold front quickly decays as it crosses the area tomorrow, with the only notice of its passage being a brief increase in northerly winds gusting up to 15 mph. Otherwise, high pressure expected to dominate the weather across the region, keeping conditions seasonal and dry.
Some frost covered bridges possible north later tonight. Cloud cover has begun to move into the state this afternoon as depicted by GOES-16 satellite imagery, with temperatures having reached the low 40s north to upper 40s across the south. Expect cloud cover to continue filtering in as the upper level ridge inches closer to the area.
(This afternoon through Thursday) High pressure will continue over the area through the short term with scattered to broken high clouds. The main forecast challenge will be the effect of the high cloudiness on nighttime low temperatures the next 2 nights. Regardless, almost all locations are expected to dip back below freezing, with pockets of mid 20s (perhaps a bit lower).
There will be a weak trof that moves in on tomorrow, however it will generally stay to the south and do not expect it to have much impact on temperatures for north central and western Nebraska, thus trended to the warmer models.
941 PM EST Wed Dec 20 2023 High pressure will be in place across the region today into Thursday, with mild temperatures expected through the weekend.
642 PM EST Wed Dec 20 2023 High pressure will build into the region tonight and last through the remainder of the week.
558 PM EST Wed Dec 20 2023 High pressure will prevail through the rest of the week. Tonight: Overall, the setup will be nearly identical to last night with high pressure centered along the Appalachians. Lows should be similar but just a degree or two warmer.
521 PM CST Wed Dec 20 2023 (Tonight) With high pressure centering over the southern Appalachians, a return to southeasterly flow has resulted in a slight warm up from what we saw yesterday, with afternoon temps reaching the low to mid 50s. With light winds and clearing skies, will be a good night for radiational cooling, with lows falling near or just below freezing.
456 PM PST Wed Dec 20 2023 A low pressure system will be responsible for periods of rain, as well as high elevation snow in the Sierra Nevada into the end of the week.
Dew points are still low across Middle TN in the low to mid 20s. This will help keep overnight lows from falling to the dew point temp and will keep us warmer than last night, right now we are 5-10 degrees warmer than last night this time. A ridging pattern is taking hold upstairs at 500mb, so temps will steadily increase from now into the weekend with highs reaching into the low 60s by the weekend.
919 PM EST Wed Dec 20 2023 High pressure will prevail through the rest of the week. High clouds are slowly thinning as high pressure holds firm. Lows will range from the upper 20s well inland (with a few mid 20s in select locations) to the lower 40s at the beaches and Downtown Charleston.
620 PM EST Wed Dec 20 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds into and over the local area.
620 PM EST Wed Dec 20 2023 Dry high pressure lingers over the region into the weekend and provides above normal temperatures.
623 PM EST Wed Dec 20 2023 Cool high pressure will maintain below normal temperatures through Thursday night.
246 AM EST Thu Dec 21 2023 High pressure maintains dry conditions into Friday as temperatures moderate.
1240 AM EST Thu Dec 21 2023 High pressure to our north will keep conditions cold and dry for the next couple of days. The Saint Lawrence Valley and the Champlain Valley are forecast to have lows in the low teens, while eastern Vermont will see lows in the upper single digits.
ridging southward across Florida. This high will gradually be pressed eastward over the next couple of days by a developing trof moving northeast into the Great Plains tomorrow. While most of this energy will miss the region to the north, a deep slug of moisture will be pushed into the region and subsequently left behind by the departing trof.
Have shown some low PoPs throughout the day Thursday but this may be more light showers/ sprinkles or just drizzle as the moisture advects northward into the warm front across northern MO/ southern IA.
High pressure will remain over the southern Appalachians through the period. We'll be warmer today than yesterday and there will be some high clouds around.
The forecast looks on track this evening with high pressure over the region providing quiet weather. With continuing light south/SSW low level flow tonight and increasing sky coverage overhead, will go a few degrees warmer than last night's lows for min temps tonight, though still on the cool side of the guidance envelope. This results in lows in the upper 20s to around 30 and cooler in the valleys. We can expect another warmer than normal day tomorrow with highs in the lower and middle 50s.
The only exception is across the Florida Bay where the cooler waters have stabilized the air right above the water. High pressure will remain parked over the Eastern Seaboard overnight, with fresh to occasionally strong northeast breezes over the Florida Keys coastal waters expected. As the area of high pressure weakens slightly and slides northeastward late in the week through the weekend, breezes will modestly slacken.
Otherwise, weak high pressure aloft will support dry conditions, light winds, and above normal temperatures on Thursday. Late Friday a cold front and associated upper trough from the Gulf of Alaska will come onshore in WA and into our CWA Friday night with rain and snow.
Large scale ridging will continue to dominate through Friday giving us continued above average temperatures in the 30s and 40s.
1219 AM EST Thu Dec 21 2023 Cool high pressure will maintain below normal temperatures through tonight.
With warm air advection throughout the day, highs should stay in the low 60s and lows will only get down into the low 50s.
1241 AM EST Thu Dec 21 2023 Dry high pressure lingers over the region into the weekend and provides above normal temperatures.
331 AM EST Thu Dec 21 2023 (Today through Friday) High pressure and dry conditions will continue through the short term period.
corrected credits at bottom High pressure maintains dry conditions into Friday as temperatures moderate.
1253 AM PST Thu Dec 21 2023 A low pressure system will be responsible for heavy rainfall in the Kern County mountains today.
1044 PM EST Wed Dec 20 2023 Dry high pressure lingers over the region into the weekend and provides above normal temperatures.
(Today) High pressure has moved over the Southeast resulting in light winds and mostly clear skies this morning. With a very dry airmass in place, indicated by dewpoints in the upper teens to lower 20s, no fog/freezing fog is expected this morning.