Aikyam-Lab/Synoptic-Bench huggingface dataset:
145 PM PST Wed Dec 6 2023 A fading upper level ridge and an approaching cold front will contribute to warmer temperatures Wednesday with morning fog possible this morning. There is a chance for precipitation in the northern portions of the San Joaquin Valley later today as the cold front moves through.
After a day of some record warmth across the area, cooler and more active weather will push into the area overnight tonight.
618 PM EST Wed Dec 6 2023 (This evening through Thursday) Key Message: Cool temperatures today and tonight before warmer weather arrives on Thursday. After the sun rises temperatures should warm up quickly with abundant sunshine and mid ridging building helping to warm temperatures back up into the 50's.
This is in response to a cool Pacific trough which will destabilize the atmosphere.
531 PM CST Wed Dec 6 2023 (Tonight through Thursday night) The mid-level synoptic pattern flattens out across South-Central Texas in the short term as an upper level trough establishes and digs across the Intermountain West. At the surface, high pressure will continue to move eastward and this will allow for surface winds to become more southeasterly into tonight and southerly on Thursday.
Winds should continue to shift towards an onshore orientation overnight and into tomorrow, bringing about the return of some additional cloud cover while setting in motion an increase in moisture availability ahead of the approach of a cold front this weekend.
546 PM CST Wed Dec 6 2023 Multiple hi-res models are showing an area of reduced visibilities developing across portions of the southern Edwards Plateau beginning early tomorrow morning associated with the low-level moisture return. -Gale (Tonight through Thursday night) The mid-level synoptic pattern flattens out across South-Central Texas in the short term as an upper level trough establishes and digs across the Intermountain West. At the surface, high pressure will continue to move eastward and this will allow for surface winds to become more southeasterly into tonight and southerly on Thursday.
300 AM EST Thu Dec 7 2023 Warmer and mostly sunny conditions are expected today with highs around 50.
Tonight, we will have increasing high clouds as the ridge axis aloft shifts east of our area.
948 PM CST Wed Dec 6 2023 (The rest of tonight) South winds will stay up tonight in most places, which will help keep overnight temperatures warmer than the past several nights. These conditions combined with warmer temperatures and min afternoon relative humidity values generally in the 35 to 45 percent range will elevate fire weather concerns across the CWA Thursday afternoon.
1054 PM CST Wed Dec 6 2023 Multiple hi-res models are showing an area of reduced visibilities developing across portions of the southern Edwards Plateau beginning early tomorrow morning associated with the low-level moisture return. -Gale (Tonight through Thursday night) The mid-level synoptic pattern flattens out across South-Central Texas in the short term as an upper level trough establishes and digs across the Intermountain West. At the surface, high pressure will continue to move eastward and this will allow for surface winds to become more southeasterly into tonight and southerly on Thursday.
1100 PM CST Wed Dec 6 2023 Evening surface analysis depicted ridging stretched from the lower Mississippi Valley northeast into the upper Ohio Valley.
250 AM EST Thu Dec 7 2023 A drying and cooling trend continues today as high pressure builds across New England. Temperatures moderate late week and into the weekend as the high moves offshore.
(The rest of tonight) South winds will stay up tonight in most places, which will help keep overnight temperatures warmer than the past several nights. These conditions combined with warmer temperatures and min afternoon relative humidity values generally in the 35 to 45 percent range will elevate fire weather concerns across the CWA Thursday afternoon.
Temperatures were generally slightly warmer than previously forecast due to sky cover and winds, so they were raised slightly. (This evening through Thursday) Key Message: Cool temperatures today and tonight before warmer weather arrives on Thursday. After the sun rises temperatures should warm up quickly with abundant sunshine and mid ridging building helping to warm temperatures back up into the 50's.
1100 PM CST Wed Dec 6 2023 (This evening through Thursday) An upper level trough will move through the Rockies and into the central plains tonight into tomorrow, which will cause pressure falls in the southern plains, resulting in an increase in southerly flow, increasing moisture, and warmer temperatures tonight.
1055 PM MST Wed Dec 6 2023 Aviation Section Updated After a day of some record warmth across the area, cooler and more active weather will push into the area overnight tonight.
Early this morning, broad high pressure was centered across Alabama and Mississippi, with ridging extending into the Northeast and the Gulf of Mexico. A warm front extended from the Dakotas into north central Iowa, and was accompanied by plentiful high clouds. This ridging will bring warmer air across the region, with 925-850 hPa temperatures poised to climb to around 10-11 C. The work week will close out with continued dry weather with increasing clouds thanks to increasing moisture and a positively tilted trough approaching from the west. An area of low pressure is progged to develop ahead of the trough as it works its way out of the eastern Rockies.
910 PM PST Wed Dec 6 2023 A trough moving inland tonight will deepen the marine layer, sending low clouds and fog into the valleys through daybreak. This trough will also bring blustery west winds to the mountains and deserts Thursday.
Well-defined upper level trough will move across the forecast area late this evening. However, the downsloping won't last with an approaching cold front from the west. Precipitation will fill in ahead of the front as it moves east allowing for measurable rain in the lower valleys.
A southerly breeze is starting to develop, mainly across the Delta, as the high slides east. Warmer temperatures arrive tomorrow with highs near 60.
Currently - Cool conditions continue in wake of the recent cold front passage. These winds are being driven by high pressure centered over the southeastern United States and allowed to return by a cooling mainland. Expect overnight lows to range broadly in the lower to mid 60s. A robust high pressure centered over the southeastern United States and a cooling mainland will maintain fresh northerly breezes on Keys waters through the overnight.
Lingering cold air will promote frost and freezing temperatures tonight across the interior valleys.
525 AM EST Thu Dec 7 2023 Warmer and mostly sunny conditions are expected today with highs around 50.
The Florida Keys is currently experiencing the coolest morning of the season thus far, with temperatures ranging from the upper 50s in the Upper Keys to the lower 60s in the Middle and Lower Keys. CIMSS MIMIC TPW is highlighting very dry air across the region in the wake of yesterday's cold front. The high currently centered over the Southeast will gradually shift eastward, which will cause our winds to veer to the northeast then the east today and tonight.
Clouds will begin to increase from the west as we head into the afternoon with highs peaking into the low 60s across the forecast area. Expect overnight lows to dip into the low to mid 40s.
Winds will remain light through the next 48 hrs, as high pressure settles directly over GA. With the Gulf moisture, a digging trough over the Great Planes will help to initialize a few showers and maybe a few thunderstorms across West Georgia. Temperatures this morning will be chilly, seeing lows in the mid to upper 20s to low 30s (Much or all of the area will be at or below freezing). Temperatures will be a tad warmer tomorrow night (mid to upper 30s).
A dry trough of low pressure will bring increasing southwest winds across northern Arizona today.
Well above normal temperatures continue Friday, but cooler than today.
Afternoon heating should also allow sufficient vertical mixing into the low-level jet flow at least up to 925 mb, which could result with wind gusts in the 30-40 mph range. The best location for the high end wind gusts up to 40 mph will be across all of central Oklahoma (including westcentral), so will have a Wind Advisory in effect in those areas late this morning until sundown. A long-wave upper trough will be digging further into the southwestern U.
Upper level analysis shows ridging over the central states and a trough over the west coast. Southwesterly winds are starting to become gusty across parts of northeastern WY, but the high winds over the southern Hills/foothills have not yet materialized. Have issued a Wind Advisory mainly for northwestern SD tonight, but included areas to the south as well, because winds there will increase Friday behind a secondary cold front.
Still expect a dry and warmer day today across the region. Tonight, we will have increasing high clouds as the ridge axis aloft shifts east of our area.
458 AM CST Thu Dec 7 2023 Updated aviation portion for 12Z TAF issuance - Warmer temperatures are expected today, and well above normal temps (10-20 degrees), but below records, remain likely on Friday.
As onshore flow persists, more moisture will stream into the area today leading to increased cloud cover and warmer temperatures. Onshore winds will increase on Friday ahead of an approaching cold front.
A cold Pacific trough settles over the Northern Rockies today through late Friday bringing periods of rain/snow. Gusty westerly winds (25-35 mph) will also be present after a cold front passage this morning.
726 AM EST Thu Dec 7 2023 A drying and cooling trend continues today as high pressure builds across New England. Temperatures moderate late week and into the weekend as the high moves offshore.
(Today through Friday) High pressure is centered right over Central Alabama this morning. With temperatures 27-32 degrees, freezing fog is likely occurring. It's possible some bridges over these water bodies could be slick this morning. High pressure will slowly drift off to the east today with ridging aloft moving over Alabama. Highs tomorrow will be in the low to upper 60s, perhaps a few near 70, with a more noticeable southerly breeze.
If patchy fog begins to develop in locations around mid state, and with overnight temperatures, if not already, at or below freezing, this means fog formation would be of the freezing variety. If this occurs, will likely issue a freezing fog advisory for portions if not all of mid state region thru remainder of early morning hours. Dry conditions will prevail through Friday afternoon as ridging influences surface and aloft, although shifting eastward, maintain these dry conditions. Relative humidity values this afternoon will be on the low side.
(Today through Friday) Latest satellite imagery indicates mid to high clouds increasing across Deep South Texas and the Rio Grande Valley early this morning in response to an approaching 500mb trough. At the surface, high pressure moves across the northern Gulf of Mexico with strengthening low pressure across the Southern Plains. Highs on Friday will range from the mid 70s at the beaches to the low to mid 80s inland. Friday will be breezy as the pressure gradient strengthens due to developing low pressure across the Plains.
The upper-level trough poised to bring our weather back to December reality is moving onshore Washington state. At the surface, a cold front passage begins moving through the northwestern zones this morning and continuing through the remainder of the region this afternoon. Precipitation wise, ahead of the cold front, there are some rain showers being picked up by KGGW from the Missouri River Breaks stretching up to northwest Valley County.
There are gusty winds being observed over mountain ridges, up to around 40-45 mph. Dry conditions are expected across the area after midnight as high pressure ridging builds in.
(Today) High pressure is building into the Tennessee Valley early this morning, with mostly clear and calm conditions prevailing across the area. Per the latest Nighttime Microphysics satellite imagery, patchy fog/freezing fog has developed in sheltered valleys and long area lakes/rivers. With a strong area of high pressure becoming established over the Deep South, a sunny/clear day will be on tap for us -- with highs returning to the upper 50s to around 60 degrees in most locations.
Winds will remain light through the next 48 hrs, as high pressure settles directly over GA. With the Gulf moisture, a digging trough over the Great Plains will help to initialize a few showers and maybe a few thunderstorms across West Georgia. Temperatures this morning will be chilly, seeing lows in the mid to upper 20s to low 30s (Much or all of the area will be at or below freezing). Temperatures will be a tad warmer tomorrow night (mid to upper 30s).
533 AM CST Thu Dec 7 2023 (Today) High pressure is building into the Tennessee Valley early this morning, with mostly clear and calm conditions prevailing across the area. Per the latest Nighttime Microphysics satellite imagery, patchy fog/freezing fog has developed in sheltered valleys and long area lakes/rivers. With a strong area of high pressure becoming established over the Deep South, a sunny/clear day will be on tap for us -- with highs returning to the upper 50s to around 60 degrees in most locations.
450 AM CST Thu Dec 7 2023 (Today through Friday) High pressure is centered right over Central Alabama this morning. With temperatures 27-32 degrees, freezing fog is occurring. It's possible some bridges over these water bodies could be slick this morning. High pressure will slowly drift off to the east today with ridging aloft moving over Alabama. Highs tomorrow will be in the low to upper 60s, perhaps a few near 70, with a more noticeable southerly breeze.
Much warmer temperatures will remain in place today as dry conditions prevail. Cooler temperatures with continued dry conditions Friday through the weekend with temperatures down to near normal levels. Zonal flow aloft as the upper ridge that brought near record high temperatures over the past two days has moved on east. Areas of high clouds will push across the area today with high temperatures, although cooler for most places than Mon/Tue, will still be running 8-12 degrees above normal.
(Rest of Today) Any remaining freezing fog or fog over some of the water bodies is dissipating rapidly.
LeFlore County has been added to the existing Wind Advisory this morning, with gusts exceeding 40 mph expected primarily in the higher terrain areas of the county.
A large upper level trough moves across the Rockies tonight and into tomorrow morning. Rounding the bottom of that trough will be a 700mb jet with 40-50kt winds stretching west to east across our region. Will upgrade the High Wind Watches over the mountains to warnings as gusts between 70-75mph will be seen.
358 PM EST Thu Dec 7 2023 Southerly winds between high pressure to the southeast and an approaching system will keep temperatures above normal through the rest of the week with breezy daytime conditions.
With the southern Ontario low pressure expected to dominate the wind field on Friday (continuous WAA), by the time the secondary low approaches Illinois Friday night and precipitation across the CWA begins, precipitation should be rain only.
Current water vapor imagery shows strong upper ridging over the Plains, while over the western CONUS a broad upper trough is in place. Winds weaken after sunset as boundary layer mixing decreases and the approaching trough/frontal boundary pushes the core of the LLJ off to the east. Slight chance (20%) that there could be an isolated heavier shower or weak thunderstorm south of I- 35 if the low can track just enough north to bring some weak instability into the area.
Winds will get gusty from the south through the morning as the warm front clears the area. Sharp ridging aloft will traverse the region through Friday. The broad trough over the western CONUS will compress in wavelength as embedded synoptic-scale features superpose while the strong jet over the Southwest CONUS drives eastward.
(This afternoon through Friday) At the surface, high pressure is centered just east of Central Alabama which has allowed for a light, southerly breeze. The mid to upper level ridge axis will soon shift east of the area, and a deeper presence of southwesterly flow will develop. There will likely be areas of river fog again tomorrow morning, but hopefully not freezing fog since lows will be above freezing in the mid to upper 30s for much of the area except for cooler spots across the northeast where some lower 30s are possible.
Within this dry air, dewpoints have dropped into the single digits in the higher elevations of far northeast Georgia this morning. Winds will remain light through the next 48 hrs, as high pressure settles directly over GA. With the Gulf moisture, a digging trough over the Great Planes will help to initialize a few showers and maybe a few thunderstorms across West Georgia. Temperatures this morning will be chilly, seeing lows in the mid to upper 20s to low 30s (Much or all of the area will be at or below freezing). Temperatures will be a tad warmer tomorrow night (mid to upper 30s).
Cooler temperatures with continued dry conditions Friday through the weekend with temperatures down to near normal levels.
The aforementioned Low pressure will continue to strengthen to the west of the FA over the next 24 hours.
pdf Tranquil weather conditions are expected tonight through Friday as high pressure continues to migrate overhead and then push east into the Atlantic through Friday. Lows tonight will be warmer tonight as an impulse lifts overhead bringing a blanket of mid and high clouds; readings will be in the low/mid 40s inland and in the low 50s closer to the coast, which will not support frost development.
Upper trough in the NW United States begins to to develop/strengthen as it moves southeast into Oklahoma and N Texas this weekend.
This morning a cold front pushed through the Northern Rockies lowering snow levels to around 4500 feet MSL.
1052 AM CST Thu Dec 7 2023 (Rest of Today) Any remaining freezing fog or fog over some of the water bodies is dissipating rapidly.
Rainfall amounts will be light with the North Bay coastal ranges seeing the highest totals, up to 0. Lows are expected to cool into the lower 30s in the wind-sheltered interior.
With dry low-levels, highs should be able to warm nicely near seasonable values in the low 60s. Clouds will begin to increase from the west as we head into the afternoon with highs peaking into the low 60s across the forecast area. Expect overnight lows to dip into the low to mid 40s.
Mid-level Water Vapor imagery paints a pretty clear picture, with a steep ridge axis extending from the Gulf Coast to eastern Canadian Prairies. Quick on it's heels, the large western trough continues to churn eastward ashore of the West Coast, with several short wave impulses ejecting out ahead through the intermountain west and Rockies. As for wintry precipitation, the concern is basically zero now, with surface temps and more importantly surface wet bulb temps, remaining above freezing through the end of precipitation.
High temperatures ranging from around 60 to the low 60s today rise to the mid 60s over northeastern portions of the forecast area to the low 70s over southeast Mississippi and Mobile County. Low temperatures tonight are expected to range from around 40 north of Highway 84 to the low 50s along the coast.
Most recent water vapor and upper air analysis shows the ridge axis just east of our forecast area, with southwest flow aloft, while a mild trough sits over the NW PAC. At the surface, low pressure continues to sit over north central MT, with a cold front running south into WY.
Temperatures bottomed out in the upper 50s in the extreme Upper Keys, with lows generally in the lower 60s elsewhere. Today will be a somewhat transitional day for the Florida Keys, as high pressure over the Southeast continues to slide eastward. Temperatures somewhere in the lower to mid 70s seems appropriate, with the warmer temperature readings in the Lower Keys and the cooler temperatures in the Upper Keys.
1216 PM EST Thu Dec 7 2023 Warmer and mostly sunny conditions are expected today with highs around 50.
With ridge axis amplifying across the Ohio Valley to Great Lakes, strong WAA will help thermo profiles warm a few degrees C into the low teens at 850mb.
and Friday Wisconsin will be located between high pressure over the southeast United States and a developing low pressure which will move into the Dakotas today. As south winds strengthen, a warm front will be lifting northeast across northern Wisconsin. Surface to 800mb dewpoint depressions remain quite large (5 to 10C) so no precip is expected with the warm front. But temps will be quite a bit warmer today under partly cloudy to mostly sunny skies with highs in the low to middle 40s. Forecast soundings indicate that the low stratus will mix out with daytime heating by mid to late Friday morning, which should lead to plenty of sunshine, although mid and high clouds will increase some in the afternoon.
111 PM EST Thu Dec 7 2023 Confidence is increasing that well above average temperatures and significant rainfall will overspread the Ohio River Valley this weekend as a deep and slow moving trough builds to our west. In fact, a lot of the low-lvl clouds are mixing out and dissolving based on METAR ceilings across the region. Warmer temperatures aloft will filter into eastern OH/western PA from the west with a building ridge throughout the rest of the evening. Confidence is high that temperatures will be near or a few degrees above normal this afternoon, ranging in the mid-40s to upper-40s in the lower elevations and upper-30s/low-40s in the higher terrain. Ridge moves overhead later tonight and Friday with 500 mb heights building to near 5700 meters.
This is likely a reflection of the relatively cooler, shallow bayside coastal waters north of the Middle and Upper Keys. This is a vector response to the gradient between the cooler water to the north of the island chain and the warmer water to the south of the chain. Across the Lower Keys, with an observed more easterly component to the surface winds, temperatures were able to reach the mid 70s this afternoon. A surface area of high pressure will continue to slide eastward, reaching the western Atlantic overnight tonight through Friday.
The highest potential for this right now looks to be in north central OK. Highs in the upper 60s to upper 70s are expected across parts of central and southern OK, and north TX whereas areas NW of the sfc features are expected to reach the low 60s.
1032 AM EST Thu Dec 7 2023 Confidence is increasing that well above average temperatures and significant rainfall will overspread the Ohio River Valley this weekend as a deep and slow moving trough builds to our west. In fact, a lot of the low-lvl clouds are mixing out and dissolving based on METAR ceilings across the region. Warmer temperatures aloft will filter into eastern OH/western PA from the west with a building ridge throughout the rest of the evening. Confidence is high that temperatures will be near or a few degrees above normal this afternoon, ranging in the mid-40s to upper-40s in the lower elevations and upper-30s/low-40s in the higher terrain. Ridge moves overhead later tonight and Friday with 500 mb heights building to near 5700 meters.
After a couple of days of below average cooler weather, a warm up will start today and continue into the weekend. This is due to upper level ridging and strong high pressure setting up over the southeast U.
721 PM EST Thu Dec 7 2023 After a couple of days of below average cooler weather, a warm up will start today and continue into the weekend. This is due to upper level ridging and strong high pressure setting up over the southeast U.
Temperatures will be cooler on Friday behind this system. Highs will be about 10 to 15 degrees cooler on Friday compared to today.