Aikyam-Lab/Synoptic-Bench huggingface dataset:
539 AM CST Tue Dec 12 2023 - High pressure will provide tranquil weather through the end of the week with near to slightly above normal temperatures. A quiet weather pattern is forecast to continue through the week as high pressure dominates the weather pattern. Winds will shift to the north/northeast late this afternoon and tonight as a weak cold front passes through. As the week progresses, an upper level ridge will build into the Mississippi Valley as an upper low digs into the Southwest and slowly migrates east into the southern Plains by week's end.
Forecast soundings indicate the high clouds should be fairly dense with a large depth (~15,000 ft) of saturation with respect to ice. These clouds will result in warmer conditions tonight by radiating infrared radiation back to the surface, offsetting some of the loss of heat.
938 AM EST Tue Dec 12 2023 High pressure builds into the area today then weakens slightly with the passage of a cold front tonight.
257 AM MST Tue Dec 12 2023 - Cloudy and cooler today across mountains and plains.
Upper ridge moves through the area on Wednesday with warmer temperatures which will be in the 40s in most areas.
A 1032 mb high settles over the region today bringing dry but cooler weather. By peak heating Wednesday, H85 temps will be between +2 and +4C, effectively pushing highs about 10 to 20 degrees above normal as upper ridging builds in. Much of the forecast period maintains upper level ridging over the western CONUS with troughing over the eastern CONUS, placing this CWA under northwest flow aloft.
As the high pressure moves east winds will shift to become more easterly. This morning will be a chilly one as temperatures will be at or below freezing dipping into the low 30s with some places dropping into the mid 20s. Afterwards mostly sunny skies should dominate as high temperatures will warm into the high 50s to low 60s.
515 AM CST Tue Dec 12 2023 Key Message: * Dry with seasonable temps Cold front will move across the area this morning with no impact on weather besides a wind shift to northwest.
Highs today and tomorrow look to top out in the lower-50s to near 60, with lows in the mid-20s to lower-30s.
334 AM CST Tue Dec 12 2023 09z/3am surface analysis shows a weak cold front extending from Lake Superior southwestward to near Kansas City. High temperatures will range from the upper 30s far northwest around Galesburg and Lacon to the lower 50s south of I-70. After a cloudy start to the day, increasing amounts of sunshine will be observed during the day Wednesday with highs climbing into the lower to middle 40s.
353 AM MST Tue Dec 12 2023 This morning a cold front is moving across the Tri-State area bringing a shift in wind direction to the northeast with virga showers moving across the northeast corner of the area. The Tri- State area will be under a weak upper ridge today while a cut-off trough moved over the Western CONUS. Near the surface, the Southern to Central High Plains will be under split flow with high pressure over the Southeast CONUS and an area of low pressure over SW Arizona. Throughout the day, the cut-off trough is expected to develop into a closed low system while moving over the Four Corners. Rain is expected to be the main p-type for those generally east of KS-25 with better potential for snow west of the highway, especially over East-Central Colorado.
721 AM EST Tue Dec 12 2023 High pressure builds into the area today then weakens slightly with the passage of a cold front tonight.
631 AM EST Tue Dec 12 2023 A cold frontal boundary will move through tonight with some light lake effect tonight and Wednesday. High pressure then builds into the region later this week and weekend. A moisture starved cold front will move through the region tonight. Ahead of the front, southwesterly flow will bring in a slightly warmer airmass and break up the morning clouds. Highs should get to around 40 or into the low 40's today.
618 AM EST Tue Dec 12 2023 Dry and cool through the rest of the week with high pressure prevailing. A dry cold front crosses the area on Wednesday.
530 AM EST Tue Dec 12 2023 A cold front tracking through southeast Michigan this morning into the early afternoon hours is expected to produce an MVFR deck of clouds spreading northwest to southeast. This system will drive a sfc cold front across Se Mi late this morning. Post frontal cold air advection will be offset to a degree by a steepening of the low level lapse rates which will sustain afternoon temps in the 30s (with a few low 40s across the far south). Low level thermal troughing will hold into Wednesday. Expansive high pressure will strengthen across the eastern US Wednesday through the end of the week as broad mid level anticyclonic flow takes hold across the region.
641 AM EST Tue Dec 12 2023 High pressure will control weather in the Ohio Valley for the remainder of the week. After a dry cold front crosses the region early tonight, strengthening high pressure will allow the airmass over the region to warm a little each passing day. A weak cold front will approach the Ohio Valley from the northwest this afternoon. This high will offer dry weather and chilly temperatures with lows Wednesday night generally in the lower and middle 20s.
Dry conditions, light winds and seasonable temperatures are expected for the rest of the week as high pressure builds over the region. Today through Wednesday night A deepening upper-level trough moving over the Great Basin region today will promote a few isolated snow showers across the area today mainly across northeastern Nevada. Most roadways will see less than two tenths of an inch through today with little to no accumulation expected during the day as air temperatures rise above freezing. Freezing fog is a possibility for some valleys in northern and northeastern Nevada tonight into Wednesday morning. Temperatures will be a bit cooler Wednesday under northeast flow with highs reaching into the upper 30s to lower 40s for most valleys.
Gusty easterly ridge top winds are expected along the Sierra crest today into Wednesday morning.
554 AM EST Tue Dec 12 2023 High pressure builds into the area today then weakens slightly with the passage of a cold front tonight.
944 AM EST Tue Dec 12 2023 High pressure will control weather in the Ohio Valley for the remainder of the week. After a dry cold front crosses the region early tonight, strengthening high pressure will allow the airmass over the region to warm a little each passing day. Dry cold front continues to move southeast toward the area, currently stretching from Michigan down through northwest Indiana into Illinois. Previous discussion-> A weak cold front will approach the Ohio Valley from the northwest this afternoon. This high will offer dry weather and chilly temperatures with lows Wednesday night generally in the lower and middle 20s.
354 PM EST Tue Dec 12 2023 A cold front will cross the region Wednesday morning.
201 PM EST Tue Dec 12 2023 High pressure will keep dry conditions and seasonable temperatures in the forecast into the weekend. A weak cold frontal boundary will cross the region this evening. Clearing skies Wednesday night should aid efficient radiational cooling, dipping overnight lows into the lower 20s and possibly upper teens in some locations.
1120 AM CST Tue Dec 12 2023 Skies are sunny across the Mid-South this morning with temperatures ranging from the lower 40s to lower 50s. A nice afternoon is in store for the region as temperatures warm into the lower 50s to around 60 degrees.
With light winds in the Milk and Missouri river valleys, temps will be cooler than surrounding areas where a light SW wind will keep temps a bit higher, especially in the SW zones and up around Fort Peck Lake. TFJ Upper ridge moves through the area on Wednesday with warmer temperatures which will be in the 40s in most areas.
Afternoon satellite imagery shows some lingering stratus in place across the lower Snake Plain, Magic Valley and into the South Hills. Thu through next Tue night The ensembles continue the strong upper level ridge scenario until Mon night, with stratus and fog the main forecast problem. The temperatures for the Snake River plain/eastern Magic Valley and the Bear Lake basin are the lowest confidence, depending entirely on how much stratus develops. As usual with an upper level ridge, little to no wind, never mind wind of significance. The return of troughing and precipitation appears to be trending even less likely than yesterday.
Comfortable and cooler conditions are being experienced across the Florida Keys forecast area this morning. An expansive area of high pressure across the eastern United States is maintaining fresh to occasionally strong breezes across the Florida Keys coastal waters and island chain.
Some thin cirrus is moving over the region today, but high pressure at the surface and low-amplitude ridging aloft will be sufficient to keep conditions warmer and drier today and tonight. Adjusted dew points toward the dry end of guidance through this afternoon and nudged Min Temps tonight a little cooler to follow recent trend of radiational cooling overachieving. As the high pressure moves east winds will shift to become more easterly. This morning will be a chilly one as temperatures will be at or below freezing dipping into the low 30s with some places dropping into the mid 20s. Afterwards mostly sunny skies should dominate as high temperatures will warm into the high 50s to low 60s.
This high will continue to traverse southeastward, roughly following the Missouri River.
Tidal levels are running higher than predictions with minor coastal flooding possible, mainly in the lowest lying areas (lots, parks, and roads with only isolated road closures expected). Clearing later this morning, high temperatures recovering to the lower to mid 60s today.
Temperatures across the region range in the mid 50s to near 60, expecting to reach the lower to mid 60s by mid afternoon.
214 PM EST Tue Dec 12 2023 A weak cold front will push southeast across the region tonight, then a slow moving area of high pressure will build into the Mid Atlantic region late this week.
1132 AM EST Tue Dec 12 2023 A cold front will bring gusty winds today and cooler temperatures tonight through Wednesday night.
At the upper-levels, a trough was digging southward over the western US. The trough should continue southeastward into the Four Corners region tonight, before settling in across the Desert Southwest as a nearly closed low by tomorrow afternoon. Ahead of this system, low-level moisture will continue to stream in from the southeast and advect warmer air into the region.
1142 AM CST Tue Dec 12 2023 (Today through Wednesday afternoon) An upper trough over ID this morning will drop south into NV today developing into a closed low that will continue to sink south into Srn NV overnight. Wednesday this low will wobble into AZ. Readings should be a few degrees cooler Wednesday east of the mountains.
1055 AM CST Tue Dec 12 2023 Some thin cirrus is moving over the region today, but high pressure at the surface and low-amplitude ridging aloft will be sufficient to keep conditions warmer and drier today and tonight. Adjusted dew points toward the dry end of guidance through this afternoon and nudged Min Temps tonight a little cooler to follow recent trend of radiational cooling overachieving. As the high pressure moves east winds will shift to become more easterly. This morning will be a chilly one as temperatures will be at or below freezing dipping into the low 30s with some places dropping into the mid 20s. Afterwards mostly sunny skies should dominate as high temperatures will warm into the high 50s to low 60s.
1101 AM EST Tue Dec 12 2023 A weak cold front will push southeast across the region tonight, then a slow moving area of high pressure will build into the Mid Atlantic region late this week.
1226 PM EST Tue Dec 12 2023 High pressure will control weather in the Ohio Valley for the remainder of the week. After a dry cold front crosses the region early tonight, strengthening high pressure will allow the airmass over the region to warm a little each passing day. Dry cold front continues to move southeast toward the area, currently stretching from Michigan down through northwest Indiana into Illinois. Previous discussion-> A weak cold front will approach the Ohio Valley from the northwest this afternoon. This high will offer dry weather and chilly temperatures with lows Wednesday night generally in the lower and middle 20s.
357 PM EST Tue Dec 12 2023 A cold front will move through tonight, which will result in lake effect snow showers tonight and Wednesday. High pressure then builds into the region later this week and weekend, resulting in a more prolonged period of dry weather. 355 PM Update: A moisture-starved cold front will move through the area tonight, which will bring some light rain and snow showers to parts of Central NY (mainly the Finger Lakes Region).
At the same time, a weak cold front will slide through the region overnight, shifting winds from the southwest to the north. The higher level clouds will stick around through a good portion of the day tomorrow, and with weak cold air advection, highs will be about 3-5 degrees cooler tomorrow vs today in most spots.
(Rest of Today) Tranquil weather across the Tennessee Valley this afternoon with high pressure in control of things. For this reason, low temperatures will run 5-7 degrees higher than last night as most locations will bottom out in the low to mid 30s.
These clouds will continue to increase over the forecast area through the afternoon and evening as high pressure slowly propagates eastward. While getting some flurries isn't an unrealistic possibility, the shear magnitude of the dry air in the boundary layer (dewpoints as low as -50 to -40C in the low levels) will make it difficult to see anything other than a brief shot of light snow in an environment that has been locally augmented by higher precipitation rates. The overall pattern shifts to become more southerly as an H500 trough digs in and churns over the western portions of the CONUS. In Iowa, this will translate to H500 ridging and warmer than normal high temperatures in the upper 40s to low 50s to finish out the work week.
A quick moving weather system will move across Arizona Wednesday and Wednesday night bringing some breezes and cooler, closer to normal temperatures.
1226 PM EST Tue Dec 12 2023 West flow in the wake of a cold front will continue to usher Lake Michigan moisture inland. Tonight, a warm front will release one last push of lake moisture inland, which may help maintain some low-end vfr and possibly mvfr cloud coverage. This system will drive a sfc cold front across Se Mi late this morning. Post frontal cold air advection will be offset to a degree by a steepening of the low level lapse rates which will sustain afternoon temps in the 30s (with a few low 40s across the far south). Low level thermal troughing will hold into Wednesday. Expansive high pressure will strengthen across the eastern US Wednesday through the end of the week as broad mid level anticyclonic flow takes hold across the region.
1216 PM EST Tue Dec 12 2023 High pressure will keep dry conditions and seasonable temperatures in the forecast into the weekend. A weak cold frontal boundary will cross the region this evening.
244 PM CST Tue Dec 12 2023 Key Message: * Dry and seasonable conditions High pressure will continue to be the dominant weather feature through Wednesday night (and beyond) which will promote dry and seasonable conditions. While this cloud cover will aid in limiting radiational cooling, the continued cold advection should still allow temperatures to dip into the low to mid-20s tonight before rebounding back into the upper 30s Wednesday afternoon.
- Mild temperatures Wed/Thu, but cooler over snow pack.
Across the intermountain west, an upper level low will become cutoff from the northern stream on Wednesday, helping to slow down the overall pattern across the central and eastern CONUS for the second half of this week.
The lows will be in the low to mid 40s along the Piney Woods region, the mid to upper 40s for areas north of I-10, the low 50s for areas south of I-10, and the mid 50s along the coasts. On Wednesday, skies will remain mostly cloudy for much of the region and keep us slightly cooler than today. The highs are expected to range in the low 60s for areas north of I-10 and the low to mid 60s for areas south of I-10. The lows Tuesday night into Wednesday morning will be in the low to mid 40s for areas north of I-10, the upper 40s to low 50s for areas south of I-10, and the mid 50s along the coasts.
APX and surrounding radars as well as surface observations indicate that lake banding has set up off of Lake Superior with sufficiently cold air moving across the relatively warmer waters of the Great Lakes. Pattern Forecast: By early Wednesday morning, longwave trough axis is expected to be draped to our east across the eastern Great Lakes. Upstream ridging over the western tier of the continent.
314 PM EST Tue Dec 12 2023 Period of modest height falls emanating from a closed mid level low rotating across northern Ontario directing a cold front across southeast Michigan this afternoon. Given the higher likelihood for a mostly clear sky, this will support lows well into the 20s Wed morning.
219 PM EST Tue Dec 12 2023 Dry high pressure will dominate through late this week with below average temps each day. Moisture returns over the weekend as a coastal low pressure system will likely develop. High pressure remains over the forecast area today with cooler conditions continuing through day along with generally light northeast winds.
1231 PM EST Tue Dec 12 2023 A weak cold front will push southeast across the region tonight, then a slow moving area of high pressure will build into the Mid Atlantic region late this week.
Have leaned towards MOS guidance for afternoon highs each day given the dry airmass and building high pressure. High temperatures top out in the lower 60's today and Wednesday, while overnight lows tonight bottom out in the lower to middle 30's inland and upper 30's to near 40 along the coast.
346 PM EST Tue Dec 12 2023 A cold front sweeps eastward across the area late this afternoon through evening. Behind the front, high pressure builds into the region through the rest of this week and into the weekend. A cold front moves southeast across this evening, bringing temperatures back down to below average with lows in the mid to upper 20s tonight. Otherwise, strong high pressure of around 1040mb builds in from the west, becoming centered over the Ohio Valley by Wednesday night.
1029 AM CST Tue Dec 12 2023 The forecast remains on track this morning, with the cold front near I-70 at this point - seen by both the wind shift and pronounced dip in dew points and temperatures behind it. Bumgardner 09z/3am surface analysis shows a weak cold front extending from Lake Superior southwestward to near Kansas City. High temperatures will range from the upper 30s far northwest around Galesburg and Lacon to the lower 50s south of I-70. After a cloudy start to the day, increasing amounts of sunshine will be observed during the day Wednesday with highs climbing into the lower to middle 40s.
At 20Z, the large scale mid and upper level pattern over the CONUS consisted of northwest flow over much of the Midwest as part of broad cyclonic flow around low pressure centered near Hudson Bay. Cutoff from the main jetstream to the north is an area of low pressure centered over the Great Basin.
1008 AM EST Tue Dec 12 2023 Dry and cool through the rest of the week with high pressure prevailing. A dry cold front crosses the area on Wednesday.
244 PM EST Tue Dec 12 2023 Upslope snow showers return tonight through Wednesday night before high pressure brings warmer temperatures for the end of the week.
Temperatures were slowly warming into the lower to mid 30s at 10 AM EST after lows in the 20s with 15 to 20 in some colder valleys of northeast Tennessee and southwest Virginia. Dry and clear today with high pressure in control. Discussion: Zonal flow aloft and low-level ridging will result in a warming trend today with temperatures closer to seasonal normals.
950 AM MST Tue Dec 12 2023 This morning a cold front is moving across the Tri-State area bringing a shift in wind direction to the northeast with virga showers moving across the northeast corner of the area. The Tri- State area will be under a weak upper ridge today while a cut-off trough moved over the Western CONUS. Near the surface, the Southern to Central High Plains will be under split flow with high pressure over the Southeast CONUS and an area of low pressure over SW Arizona. Throughout the day, the cut-off trough is expected to develop into a closed low system while moving over the Four Corners. Rain is expected to be the main p-type for those generally east of KS-25 with better potential for snow west of the highway, especially over East-Central Colorado.
1016 AM CST Tue Dec 12 2023 Skies are sunny across the Mid-South this morning with temperatures ranging from the lower 40s to lower 50s. A nice afternoon is in store for the region as temperatures warm into the lower 50s to around 60 degrees.
1256 PM EST Tue Dec 12 2023 A cold front will move through tonight, which will result in lake effect snow showers tonight and Wednesday. High pressure then builds into the region later this week and weekend, resulting in a more prolonged period of dry weather. Previous Discussion: A moisture starved cold front will move through the region tonight. Ahead of the front, southwesterly flow will bring in a slightly warmer airmass and break up the morning clouds. Highs should get to around 40 or into the low 40s today.
(This evening through Wednesday) Quasi-zonal flow will be in place aloft through the short term period as ridging builds over the Plains upstream of troughing over the northeast CONUS. Weak southern stream troughing over the southern Gulf will result in occasional cirrus at times emanating from convection near the Yucatan and from a subtropical jet nosing into southern Texas.
956 AM MST Tue Dec 12 2023 - Cloudy and cooler today across mountains and plains.
Breezy northeast flow will continue through Wednesday then increase more late in the week as low pressure begins to develop in the southern Gulf of Mexico.
1155 AM EST Tue Dec 12 2023 A cold front will move through tonight, which will result in lake effect snow showers tonight and Wednesday. High pressure then builds into the region later this week and weekend, resulting in a more prolonged period of dry weather. Previous Discussion: A moisture starved cold front will move through the region tonight. Ahead of the front, southwesterly flow will bring in a slightly warmer airmass and break up the morning clouds. Highs should get to around 40 or into the low 40s today.
1111 AM CST Tue Dec 12 2023 Key Message: * Dry with seasonable temps Cold front will move across the area this morning with no impact on weather besides a wind shift to northwest.
The upper trough that was across the Pacific Northwest has transitioned to a closed low over Nevada and Utah. Dewpoints across our southern zones have already improved from the mid teens this morning with dewpoints currently in the low to mid 40s. The influx of moisture will continue into tomorrow afternoon as the upper low moves into Arizona. Temps will be greatly influenced by the cloud cover and rain with overnight temps in the low to upper 40s with highs only reaching into the mid/upper 40s and low 50s at best.
1239 PM EST Tue Dec 12 2023 High pressure builds into the area today then weakens slightly with the passage of a cold front tonight.
229 PM CST Tue Dec 12 2023 - High pressure remains in control through the end of the week with slightly above normal temperatures.
1032 AM CST Tue Dec 12 2023 (Rest of Today) High pressure continues to promote tranquil conditions across the Tennessee Valley this morning.
And, given the presence of dry air in the lowest 2-3 km above ground, this forecast update will maintain the 20% PoPs from northeast NE into southwest IA with little to no accumulation expected.