Aikyam-Lab/Synoptic-Bench huggingface dataset:
Cyclogenesis will continue to occur throughout the day, resulting in a vertically stacked mature low pressure system over the Plains. The main feature that will impact our area will be a strong cold front that undergoes frontogenesis Tuesday evening over central KS. Soundings do indicate that there will be a period of instability in the lower levels as the cold front passes through, which may cause a line of rain showers to pass through Wednesday morning ahead of the cold front.
403 AM CST Tue Dec 22 2020 Deep layer ridging in place will set the stage for another mild and sunny day across much of the region. Not enough of a prolonged northerly wind shift to advect much, if any, cooler temps into the region. A strong attendant cold front will sweep through the central US and approach the MS River Valley late Wed.
332 AM PST Tue Dec 22 2020 A cold front that moved into the area overnight will bring colder temperatures through Christmas Eve. Fast moving cold front is pushing through the region this morning with a few light rain and snow showers along the leading edge. However, in most valleys breezy winds are keeping temperatures well above freezing.
However, we will see a cold front approach the Big Country by the end of tonight.
533 AM CST Tue Dec 22 2020 Winds decreased overnight as high pressure began to build across the mid-Mississippi River Valley. Winds remain light through today, but High pressure shifts out of the region quickly tonight.
627 AM EST Tue Dec 22 2020 High pressure will be building into the region today. Slightly above normal temperatures into Wednesday with high pressure and mostly clear skies.
The high will move east today allowing for winds to stay southerly. However, showers will begin to break out early in the day across portions of Eastern Arkansas and North Mississippi ahead of an approaching cold front. Arctic high pressure will settle over the region for Christmas Eve and Christmas Day.
405 AM CST Tue Dec 22 2020 (Issued 405 AM CST Tue Dec 22 2020) Early Morning Hours: Forecast details remain on track from the previous discussion Today through Wednesday: High pressure will build in from the south today contributing to dry conditions. Skies should clear during the morning, but we will likely have to contend with a swipe of mid-level clouds during the afternoon as some upper lvl moisture skirts the high pressure system to our south. We will then cloud over quickly as a cold front approaches from west. The cold front should pass late Wednesday afternoon into the early evening with little to no changeover to snow, owing to a pretty aggressive dry slot in association with the occluding low pressure system to our north.
744 AM EST Tue Dec 22 2020 Snow showers will diminish later today, with light, additional accumulation in the higher terrain and along I-80 corridor. Dry and mild conditions are expected Wednesday before the return of rain/snow with a passing cold front on Christmas Eve. Further ridging should diminish precipitation chances by tonight, but trapped llvl moisture should maintain extensive cloud cover and above average temperature overnight. High pressure will track across the Central Appalachians and off the Atlantic coast on Wednesday, with dry weather anticipated. As a strengthening upper trough digs into the northern Plains on Wednesday, increasing southwest flow will ramp up warm advection over our region, driving temperatures above seasonal averages.
Deep layer ridging in place will set the stage for another mild and sunny day across much of the region. Not enough of a prolonged northerly wind shift to advect much, if any, cooler temps into the region. A strong attendant cold front will sweep through the central US and approach the MS River Valley late Wed.
Southwest to westerly flow aloft will increase as an upper level low pressure trough crossing the Pacific Northwest this morning passes through the northern and central Rockies later today then the high plains early Wednesday. A surface cold front will pass through the Texas Panhandle late tonight entering the northern Rolling Plains and extreme southern Panhandle near daybreak Wednesday. Today will be a bit warmer most areas.
308 AM CST Tue Dec 22 2020 Upper ridge axis moves over TX today as upper trough over ID and NV swings east reaching the Northern Rockies later in the day. The center of this trough will move onto the plains Wednesday and then into the Great Lakes region as the backside of the trough swings down across NM and TX.
446 AM MST Tue Dec 22 2020 High Wind Warning has replaced the High Wind Watch for this afternoon and overnight. Most of the warm frontal precipitation has lifted into North Dakota or Saskatchewan, with clear skies over much of northeast Montana. Colder air will linger on Wednesday even as upper ridge begins to rebound over the west. A cold front will drop into Montana this morning with the potential for strong winds and light snow behind it's passage.
A strong Pacific cold front is currently passing through western Montana this morning, producing widespread wind gusts to near 40 mph in valley locations and up to 60 mph in the higher terrain.
337 AM CST Tue Dec 22 2020 Latest 09z surface analysis shows ridge axis extending from southern Minnesota to the Central Plains states. This has allowed skies to be mostly clear over the southern half of the forecast area with the northern areas under the influence of the upper level trough skies remained mostly cloudy. temperatures will be well above freezing. not expecting any freezing rain with temperatures 35 to 40 degrees. Focus turns to passage of cold front late Wednesday morning to Wednesday afternoon. Colder air will advect into the region behind cold front.
A cold front approaches our region again tomorrow, and with it high rain chances. Rain ends from west to east overnight tomorrow, and behind the cold front, much colder temperatures. Christmas morning brings low temperatures freezing or below for much of our region.
Colder temperatures are settling in this evening after the passage of a cold front.
553 AM EST Tue Dec 22 2020 High pressure will move overhead later today and Wednesday. A strong cold front will move across later in the week followed by high pressure and temperatures well below normal for the end of the week. Latest sfc analysis shows 1025 mb high pressure centered along the central Gulf coast with a weak front over the OH Valley. The high spreads E into and over the area through tonight, leading to a sunny sky today and decreasing wind late. The high then slides offshore for Wed, with return flow allowing for an upward nudge in temps.
Radar still indicating a few light showers remaining from eastern Butte/western Plumas Counties southeast to near Donner Pass and Echo Summit as a fast moving cold front pushes east.
A cold front will quickly move through the region producing light snow showers mainly in northern Nevada this morning followed by breezy conditions during the afternoon.
545 AM CST Tue Dec 22 2020 Latest 09z surface analysis shows ridge axis extending from southern Minnesota to the Central Plains states. This has allowed skies to be mostly clear over the southern half of the forecast area with the northern areas under the influence of the upper level trough skies remained mostly cloudy. temperatures will be well above freezing. not expecting any freezing rain with temperatures 35 to 40 degrees. Focus turns to passage of cold front late Wednesday morning to Wednesday afternoon. Colder air will advect into the region behind cold front.
456 AM PST Tue Dec 22 2020 High pressure over the region will keep the weather dry and stable through Christmas Day.
Aloft, the majority of the MS Valley lies beneath a ridge of high pressure. To the E of this ridge, a departing storm system will exit the New England region meanwhile a new trough is progged to drop SEwrd through the Intermountain West. This new trough to our NW will quickly eject into the C Plains overnight on its Ewrd track across the CONUS. A new surface cyclone will develop and move across the Nrn Plains. Showers are expected to develop along the and ahead of the approaching cold front, however amounts are expected to be on the lighter side for AR. Behind the cold front, dry and colder air will advect into the region. Cold temperatures will be felt Wednesday night behind the front with lows falling into the low 20s N to the low 30s S.
/issued 308 AM CST Tue Dec 22 2020/ Upper ridge axis moves over TX today as upper trough over ID and NV swings east reaching the Northern Rockies later in the day. The center of this trough will move onto the plains Wednesday and then into the Great Lakes region as the backside of the trough swings down across NM and TX.
An upper trough will push inland today with some lingering showers over the Cascades this morning.
Otherwise, mild high pressure will make for very pleasant outdoor conditions today under mostly sunny skies as temperatures climb well into the 60s to near 70.
1000 AM EST Tue Dec 22 2020 Snow showers will diminish later today, with light, additional accumulation in the higher terrain and along I-80 corridor. Dry and mild conditions are expected Wednesday before the return of rain/snow with a passing cold front on Christmas Eve. Further ridging should diminish precipitation chances by tonight, but trapped llvl moisture should maintain extensive cloud cover and above average temperature overnight. High pressure will track across the Central Appalachians and off the Atlantic coast on Wednesday, with dry weather anticipated. As a strengthening upper trough digs into the northern Plains on Wednesday, increasing southwest flow will ramp up warm advection over our region, driving temperatures above seasonal averages.
Light rain will impact the area first by Wednesday afternoon before an arctic cold front moves through the area Wednesday evening at which point rain is expected to switch over to snow.
RAH (Issued 405 AM CST Tue Dec 22 2020) Early Morning Hours: Forecast details remain on track from the previous discussion Today through Wednesday: High pressure will build in from the south today contributing to dry conditions. Skies should clear during the morning, but we will likely have to contend with a swipe of mid-level clouds during the afternoon as some upper lvl moisture skirts the high pressure system to our south. We will then cloud over quickly as a cold front approaches from west. The cold front should pass late Wednesday afternoon into the early evening with little to no changeover to snow, owing to a pretty aggressive dry slot in association with the occluding low pressure system to our north.
Still have areas with gusty winds from last nights cold frontal passage. 12z models continue to show upper ridge building over the Pacific northwest Wed and Thu. Main impacts will be low level inversion with increasing chances for freezing fog.
Upper-level ridging will become centered across the Tennessee Valley region today, promoting clear and tranquil conditions. A strong attendant cold front will sweep through the central US and approach the MS River Valley late Wed.
SFC winds are generally light from the SE with high pressure centered across the north central Gulf Coast. This high is forecast to gradually shift off to the east with time ahead of an approaching longwave upper trof and associated CDFNT, with deepening/strengthening southerly flow yielding increasing MSTR influx, and consequently, cloud cover. A cold front approaches our region again tomorrow, and with it high rain chances. Rain ends from west to east overnight tomorrow, and behind the cold front, much colder temperatures. Christmas morning brings low temperatures freezing or below for much of our region.
/19/ High pressure at the surface, and ridging aloft, will continue to build east through the region today. This will result in quiet weather and slightly warmer conditions. Otherwise, mild high pressure will make for very pleasant outdoor conditions today under mostly sunny skies as temperatures climb well into the 60s to near 70.
TFJ High Wind Warning has replaced the High Wind Watch for this afternoon and overnight. Most of the warm frontal precipitation has lifted into North Dakota or Saskatchewan, with clear skies over much of northeast Montana. Colder air will linger on Wednesday even as upper ridge begins to rebound over the west. A couple cold fronts will move through today.
Upper and mid-level zonal flow will persist through Tuesday before turning more southwesterly on Wednesday as a strengthening upper/mid level trough approaches from the west. Low- level moisture begins to increase late tonight into Wednesday as southerly flow develops ahead of the approaching upper/mid level trough. At the surface, high pressure shifts off to the northeast with surface flow gradually shifting to more southerly through Wednesday afternoon. Dry conditions are expected to continue through early Wednesday before rain chances begin increasing from the west late in the afternoon on Wednesday with the approaching upper/mid-level system and associated surface cold front. High temperatures today will be in the low to upper 60s across the region. Lows tonight are expected to range from the low to mid 40s inland to low 50s near the coast.
The recent passage of a cold front has resulted in morning low temperatures in the lower to mid 60s with dew points near 60 degrees. From synopsis: A high pressure cell over the Lower Mississippi Valley today will move east to the Delmarva Peninsula on Wednesday, then pass north of Bermuda on Wednesday night.
253 PM CST Tue Dec 22 2020 Low level moisture will be on the increase overnight ahead of a strong cold front which will move across the area Wednesday morning.
This will allow for slightly warmer temperatures tonight, ranging from around 50 west of Lake Okeechobee to the lower/mid 60s for the eastern metro areas.
1005 AM EST Tue Dec 22 2020 High pressure will move overhead later today and Wednesday. A strong cold front will move across later in the week followed by high pressure and temperatures well below normal for the end of the week. Latest sfc analysis shows 1025 mb high pressure centered along the central Gulf coast with a weak front over the OH Valley. The high spreads E into and over the area through tonight, leading to a sunny sky today and decreasing wind late. The high then slides offshore for Wed, with return flow allowing for an upward nudge in temps.
Highs tomorrow will be 20- 25 degrees cooler than today.
1120 AM EST Tue Dec 22 2020 High pressure will move overhead later today and Wednesday. A strong cold front will move across later in the week followed by high pressure and temperatures well below normal for the end of the week. Latest sfc analysis shows 1025 mb high pressure centered along the central Gulf coast with a weak front over the OH Valley. The high spreads E into and over the area through tonight, leading to a sunny sky today and decreasing wind late. The high then slides offshore for Wed, with return flow allowing for an upward nudge in temps.
1053 AM CST Tue Dec 22 2020 Latest 09z surface analysis shows ridge axis extending from southern Minnesota to the Central Plains states. This has allowed skies to be mostly clear over the southern half of the forecast area with the northern areas under the influence of the upper level trough skies remained mostly cloudy. temperatures will be well above freezing. not expecting any freezing rain with temperatures 35 to 40 degrees. Focus turns to passage of cold front late Wednesday morning to Wednesday afternoon. Colder air will advect into the region behind cold front.
Cold front passed through western Idaho around 4 AM MST and the western Magic Valley around 7 AM MST. VFR/MVFR behind a cold front.
1233 PM EST Tue Dec 22 2020 Dry and mild conditions are expected Wednesday before the return of rain/snow with a passing cold front on Christmas Eve. Further ridging should diminish precipitation chances by tonight, but trapped llvl moisture should maintain extensive cloud cover and above average temperature overnight. High pressure trekking eastward across the srn Appalachian Mountains should maintain dry conditions on Wednesday. Increasing sly flow on the wrn flank of crossing high pressure should yield above average temperature on the order of 7 to 10 degrees. The aforementioned high pressure ridge is in response to an evolving high amplitude pattern as a deepening trough digs across the central Plains.
A dry cold front will move across the region tonight through Wednesday, ushering in sharply colder temperatures and gusty northeast winds.
245 PM CST Tue Dec 22 2020 WV imagery shows the next trough approaching the Four Corners, and set to move through West Texas and Southeast New Mexico late Wednesday. Winds in the higher elevations of Guadalupes are going to be borderline for a high wind event over the next 18 hours or so. Unfortunately, this spring-like weather will give way to a strong cold front, set to fropa the northeast zones 15-18Z Wed.
917 AM CST Tue Dec 22 2020 Upper-level ridging will become centered across the Tennessee Valley region today, promoting clear and tranquil conditions. A strong attendant cold front will sweep through the central US and approach the MS River Valley late Wed.
A very fall like day is in store for the Ozarks today as an upper level ridge slides across the region allowing for ample sunshine. The wind gradient will continue into tonight as a cold front approaches the region from the plains. The winds will help to keep warmer temperatures overnight with lows in the 40s.
Still have areas with gusty winds from last nights cold frontal passage. 12z models continue to show upper ridge building over the Pacific northwest Wed and Thu. Main impacts will be low level inversion with increasing chances for freezing fog. With conditions calming and ridge moving overhead, patchy fog may develop at site DLS/PSC/YKM after 09Z with few-sct ceilings 2kft to 3kft AGL.
High pressure at the surface, and ridging aloft, will continue to build east through the region today. This will result in quiet weather and slightly warmer conditions. Otherwise, mild high pressure will make for very pleasant outdoor conditions today under mostly sunny skies as temperatures climb well into the 60s to near 70.
Southerly winds will increase this evening as a low pressure system currently over North and South Dakota tracks east/northeast.
High pressure will hold across the area this afternoon with light southerly flow expected. Some light patchy fog may materialize at KGPT/KHUM in the morning but should dissipate quickly as southerly flow increases ahead of the next cold front expected to arrive Wednesday night.
Highlights of period are increasing WSW winds areawide this afternoon ahead of next trough. Winds will remain elevated overnight at KMAF and eventually at KFST when LLJ strengthens ahead of gradient pattern associated with trough. Pre-frontal wind shift at northern terminals b/w 13-15z with cold front at very end of period. /issued 308 AM CST Tue Dec 22 2020/ Upper ridge axis moves over TX today as upper trough over ID and NV swings east reaching the Northern Rockies later in the day. The center of this trough will move onto the plains Wednesday and then into the Great Lakes region as the backside of the trough swings down across NM and TX.
357 PM EST Tue Dec 22 2020 A mostly sunny afternoon is well underway across the Florida Keys with temperatures comfortably in the lower to mid 70s amid relatively low levels of humidity. Concerning the forecast, there was very little changes made with this package other than to refine the timing and strength of the next anticipated cold front. This next strong cold front looks to blast through the Florida Keys on Christmas Eve night, perhaps ushered in by Santa himself.
151 PM EST Tue Dec 22 2020 High pressure will move overhead later today and Wednesday. A strong cold front will move across later in the week followed by high pressure and temperatures well below normal for the end of the week. Latest sfc analysis shows 1025 mb high pressure centered along the central Gulf coast with a weak front over the OH Valley. The high spreads E into and over the area through tonight, leading to a sunny sky today and decreasing wind late. The high then slides offshore for Wed, with return flow allowing for an upward nudge in temps.
227 PM EST Tue Dec 22 2020 Mild temperatures with rain by afternoon Wednesday will briefly change to snow behind a sharp cold front and plummeting temperatures Wednesday night.
A tight pressure gradient is in place across the area between the departing high and a developing area of low pressure across the Plains. This will drag a strong cold front through Missouri during the day Wednesday. The frontal passage is expected during the afternoon hours over the eastern counties and thus will experience the warmer temperatures longer.
1151 AM EST Tue Dec 22 2020 Dry and mild conditions are expected Wednesday before the return of rain/snow with a passing cold front on Christmas Eve. Further ridging should diminish precipitation chances by tonight, but trapped llvl moisture should maintain extensive cloud cover and above average temperature overnight. High pressure trekking eastward across the srn Appalachian Mountains should maintain dry conditions on Wednesday. Increasing sly flow on the wrn flank of crossing high pressure should yield above average temperature on the order of 7 to 10 degrees. The aforementioned high pressure ridge is in response to an evolving high amplitude pattern as a deepening trough digs across the central Plains.
Another Cold Front. The short-term forecast this forecast cycle includes another dry cold front passage, along with gusty winds. However, another cold front will push south, across West Central Texas, on Wednesday, and bring gusty surface winds, from the northwest, along with colder temperatures. The cold fronts and their associated upper troughs, of the last several weeks, have brought little if any moisture, to produce any meaningful rainfall. As for temperatures, the cold front Wednesday will bring another round of cold air, and that will help hold temperatures, through Christmas Eve, at or below usual late December temperatures.
Temperatures should remain fairly steady tomorrow as the advancement of the cold front cancels out any diurnal heating we might get. Look for a cooler day with highs in the mid 40s (NW OK) to the lower 60s (SE OK).
Showers that do develop ahead of the advancing cold front will be light with little to no aviation impact expected. Cold front pushes through the terminals from early morning through mid afternoon with clearing skies and gusty post frontal winds. /Issued 253 PM CST Tue Dec 22 2020/ Low level moisture will be on the increase overnight ahead of a strong cold front which will move across the area Wednesday morning.
344 PM CST Tue Dec 22 2020 Quiet conditions continue across the area as high pressure moves east setting up strong south to southwesterly flow across the southeast.
However, with the 6z TAF package we highly expect to start adding convection and greater impacts to terminals as our next cold front moves in.
833 PM EST Tue Dec 22 2020 High pressure remains over the southeastern U. High pressure will remain in place through Wednesday, with winds and seas remaining below headlines.
334 PM CST Tue Dec 22 2020 A significant mid level trough, spilling onto the Montana Plains as of this writing, will cut off over Nebraska and Iowa Wednesday. Building in behind that 990MB low is a 1033MB high pressure center. A strong H5 ridge builds in for Christmas Eve and Christmas Day with moderating temperatures and some sunshine.
There may be some snow flurries Wednesday morning but overall moisture is expected to decrease as high pressure returns to the Northern Rockies.