Aikyam-Lab/Synoptic-Bench huggingface dataset:
916 AM EST Mon Mar 2 2020 High pressure has shifted off to our east which has resulted in a return of southeast to south winds across the area and ending our 3-4 day cool down. Sufficient afternoon mixing will take place resulting in a slight suppression of dewpoints (between 50-60 degrees), warmer temperatures, and gusty winds this afternoon.
424 AM MST Mon Mar 2 2020 Current surface map places trof/warm front across eastern Montana/Wyoming. South-southwest winds across the forecast area become westerly as trof moves into the central Dakotas.
319 AM CST Mon Mar 2 2020 Showers will come to an end across east-central Illinois this morning as a cold front passes through the region. 08z/2am surface analysis shows a cold front just east of I-55. A wave of low pressure will track along the departing frontal boundary tonight, temporarily slowing its southward progress and spreading light rain back northward into parts of south-central Illinois. Once the low tracks into the Ohio River Valley, it will pull the front southward and bring an end to the rain chances across the far SE CWA by early Tuesday morning. Skies will become mostly sunny with highs topping out in the lower to middle 50s.
521 AM CST Mon Mar 2 2020 Latest 08z surface analysis shows weak cold front extending from southern Ontario Canada into central Missouri and high pressure over the Northern Plains states.
603 AM EST Mon Mar 2 2020 Warmer temperatures expected as high pressure moves off the coast. Rain chances will increase tonight through midweek as a cold front drops south.
1114 AM CST Mon Mar 2 2020 A weak cold front moved through the area this morning and should exit the state this afternoon. A weak cold front has moved through most of the forecast area by late morning and was located south of I-70 currently. 08z/2am surface analysis shows a cold front just east of I-55. A wave of low pressure will track along the departing frontal boundary tonight, temporarily slowing its southward progress and spreading light rain back northward into parts of south-central Illinois. Once the low tracks into the Ohio River Valley, it will pull the front southward and bring an end to the rain chances across the far SE CWA by early Tuesday morning. Skies will become mostly sunny with highs topping out in the lower to middle 50s.
128 PM EST Mon Mar 2 2020 Rain showers will be possible through Tuesday due to passing low pressure systems. The sfc cold front will stall over northeast OH/northwest PA tonight as it becomes disconnected from the upper trough that will move into the Mid-Atlantic. This sfc enhancement plus better upper support will provide another round of showers Tuesday, with the best chances occurring during the afternoon around/east of Pittsburgh coincident with the passing of the sfc front/trough axis. Warm advection will persist ahead of the trough, keeping area temperature above normal. Showers will dissipate Tuesday night as the upper trough and sfc front move east and high pressure builds to the south. Showers will linger longest in the eastern ridges due to orographic lift squeezing residual moisture as flow becomes WNW flow in the wake of this system.
1117 AM CST Mon Mar 2 2020 A cold front has shifted through the area early this morning ushering in modest CAA.
A cold front and an area of low pressure will keep rain chances in the forecast into Tuesday. Across the south and east, though, made no appreciable adjustments as the previous thoughts of some scattered development ahead of the slow moving cold front during the afternoon still looks reasonable. The cold front will continue to slowly move southeast through the area today. Tonight, another upper trough will approach the area from the northwest. The low will move northeast along the front and bring more chances for rain to the area.
At this time monitoring for the possibility of stronger winds for later this afternoon and tonight over the higher northern mountains along with the Larimer county foothills and locations along the higher terrain of the Cheyenne ridge. Mid and upper subsidence will increase from the north and west as the weakening trough continues to move off to the east. Across the lower elevations, some lingering snow showers along the Palmer Divide should dissipate by 8 am this morning.
Temperatures today will get up into the upper 50s to mid 60s, with cooler temperatures coinciding with shower activity lingering longer across NE Alabama. Aformentioned cold front swings through the area late this evening and will be the focus for heavy rain and thunderstorm, some of which may be strong to severe.
The cold front that pushed through the forecast area this morning has stalled out and is already starting to lose definition in the wind and pressure fields. Winds have gone light and variable across the forecast area with temperatures about 10-15 degrees cooler than yesterday. Aloft, an area of low pressure is spinning off the Baja Peninsula and will start to swing eastward tonight into tomorrow. Forecast model soundings across the area show that elevated instability could increase through the late afternoon as the low approaches the region and temperatures start to cool aloft. Also helping to focus storms across the southern South Plains will be another weak cold front that arrives Tuesday morning and stalls out somewhere across the southern part of the forecast area or northern Permian Basin.
239 PM CST Mon Mar 2 2020 18Z surface data has high pressure from the upper Midwest into the central Plains. However some isolated flurries are possible in the highway 20 corridor.
1145 AM CST Mon Mar 2 2020 (Today and tonight) As lower level ridge builds into the region behind a relatively weak cold front, we will see gusty north winds through this morning with a gradual decrease through the afternoon hours. With the cooler temperatures/higher humidities, fire weather conditions will be low despite the gusty wind. The cooler air coming in today is not all that cold compared to early March standards, with todays forecast highs near or just a few degrees below average.
The upper low was centered southwest of San Diego this morning, and is forecast to move across Baja and northern Sonora through Tuesday. The majority of the shower activity associated with this low is occurring from Mohave County westward. This low is going to dive southeastward today, with the low center tracking through northern Mexico. The low exits the area on Tuesday, but lingering showers are possible in the White Mountains region throughout the day. High pressure is forecast to lead to a period of fair weather and warming temperatures through the work week. Northern Arizona could see a return of cooler temperatures and an unsettled weather pattern by the weekend, but uncertainty is high at this point. Dry and slightly warmer conditions are expected on Tuesday.
1102 AM EST Mon Mar 2 2020 Warmer temperatures expected as high pressure moves off the coast. Rain chances will increase tonight through midweek as a cold front drops south.
238 PM EST Mon Mar 2 2020 A weak cold front will stall out over northwest Pennsylvania tonight. An area of low pressure will then track north across the state on Tuesday. The weak cold front will stall over northwest PA tonight, bringing another mild night for March with min temps in the low to mid 40s most spots and the mid 30s behind the front over Warren/Mckean counties.
1123 AM CST Mon Mar 2 2020 Early this morning, stratus is gradually departing to the east as a longwave trough aloft progresses east from the Northern Plains into the Great Lakes region. Stratus has been slower to depart than previously expected, keeping temperatures warmer over southwest MN and northwest IA. Cooler air and breezy conditions linger in the region today and tonight as another longwave trough aloft transverses through the region. As the aforementioned front progresses through the region this evening, cannot completely rule out sprinkles or flurries, but model soundings indicate this front is unlikely to be able to saturate the lower levels. Strong daytime mixing will yield warmer daytime high temperatures and stronger gusty winds.
130 PM MST Mon Mar 2 2020 Water vapor shows short wave trof moving through the Dakotas with strong west/northwest flow extending all the way into the Gulf of Alaska. Surface trof nearly stacked with the upper level trof, extending through the central Dakotas. Gusty winds across much of the area today both ahead of and behind the surface trof, and near advisory criteria across far northwest SD.
The atmosphere stabilizes rapidly this afternoon across the region as the low pressure system remains across far southern Arizona.
1050 AM EST Mon Mar 2 2020 High pressure centered near Bermuda reaches west across Florida. From synopsis, high pressure off of the southeastern U.
146 PM MST Mon Mar 2 2020 Upper trough axis moving through this afternoon, with surface reflection just entering far northwest part of the forecast area. High temperatures will be in the lower 60s and lows Tuesday night in the mid to upper 20s.
(This evening through Tuesday) The closed upper low near the Baja California coast will drift slowly east toward the Sonora/Chihuahua border by 04/00Z.
A disturbance will impact the West Central Mountains of Idaho and the higher elevations of Baker County, Oregon on Tuesday morning producing some light snowfall.
Chattanooga Airport, TN 55 68 48 60 46 / 90 90 30 40 50 Knoxville McGhee Tyson Airport, TN 51 66 44 60 44 / 90 100 20 20 40 Oak Ridge, TN 51 66 43 61 43 / 100 100 20 20 40 Tri Cities Airport, TN 46 64 40 59 40 / 90 100 30 10 30 TN.
Periods of sun and temperatures mainly at or above freezing is limiting the impacts on roads from these showers. There could be a few isolated locations that receive an inch or two in the higher elevations of the San Juans by this evening. Attention then turns to the whether the skies clear out tonight or not, which will dictate the low temperatures. The central mountains and nearby valleys could drop below zero if the skies can clear out especially near Crested Butte, which has the highest recent snowfall.
A broken line of showers and thunderstorms will develop along and ahead of the cold front as it pushes in overnight.
246 PM EST Mon Mar 2 2020 Water vapor imagery highlights a potent closed low pivoting southeast through the Baja Peninsula. The dominant surface feature, at least for the Keys, is the broad anticyclone centered near Bermuda. Sea level pressure has fallen a few mb as well over the past 12 hours, corroborating the retreat of the anticyclone east into the western North Atlantic. Temperatures are nearing 80 across the island chain, with dewpoints in the lower 60s.
High pressure at the surface will translate eastward away from the area on Tue allowing southerly flow to return from west to east. This will allow for moderating temperatures with highs returning to the lower 60s across the area. Aviation concerns are expected to remain on the low side through the next 24 hours. Currently have a deep upper trough digging over southern CA/Baja with strong zonal flow over the southern Plains.
1241 PM EST Mon Mar 2 2020 Southerly flow will increase moisture across the region through Tuesday ahead of a cold front which will move through late Tuesday.
1126 AM CST Mon Mar 2 2020 Latest 08z surface analysis shows weak cold front extending from southern Ontario Canada into central Missouri and high pressure over the Northern Plains states.
216 PM EST Mon Mar 2 2020 Southerly flow will increase moisture across the region through Tuesday ahead of a cold front which will move through late Tuesday.
As the trough passes this afternoon winds will pick up, At this time we anticipate the winds will remain below advisory criteria. Ahead of this wave, a warm front will move from west to east across the state, leading to warmer temperatures this afternoon with highs in the upper 30s east to the mid 40s across portions of the west. Behind the warm front, winds will shift from the southwest to the west northwest, becoming breezy.
1131 AM EST Mon Mar 2 2020 A dying cold front will approach from the Great Lakes today, then stall out over northwest Pennsylvania tonight. An area of low pressure will then track north across the state on Tuesday. A southerly low level jet and associated plume of anomalous pwats in advance of an approaching cold front will spread rain showers into the region during the afternoon and evening hours. The surface cold front is progged to stall out across northwest Pa tonight, so anticipate very mild conditions for early March with overnight min temps in the low to mid 40s most spots and the mid 30s behind the front over Warren/Mckean counties.
202 PM CST Mon Mar 2 2020 A weak cold front moved through the area this morning and should exit the state this afternoon. Cold front has pushed southeast of forecast area this afternoon. The trough axis should move east of the area by Tuesday afternoon bringing Mostly Sunny skies and rebounding temperatures back into the 50s. Tuesday Night a weak disturbance diving down the backside of the broad east coast trough may be sufficent to produce a flurry or sprinkle from Bloomington through Peoria and Galesburg.
1043 AM CST Mon Mar 2 2020 A weak cold front moved through the area this morning and should exit the state this afternoon. A weak cold front has moved through most of the forecast area by late morning and was located south of I-70 currently. 08z/2am surface analysis shows a cold front just east of I-55. A wave of low pressure will track along the departing frontal boundary tonight, temporarily slowing its southward progress and spreading light rain back northward into parts of south-central Illinois. Once the low tracks into the Ohio River Valley, it will pull the front southward and bring an end to the rain chances across the far SE CWA by early Tuesday morning. Skies will become mostly sunny with highs topping out in the lower to middle 50s.
254 PM EST Mon Mar 2 2020 The current surface analysis features an pseudo stationary boundary along the OH Valley and stretching south into the lower MS Valley. Over the next 36 hours the pattern will feature a couple disturbances ramping up along the southern stream as a deepening trough sets up along the northern stream. Thus will expect some ridge to valley differences. Some of the deeper valleys may drop into the low 30s for lows. A modest cold front will be departing southeast of the region on Tuesday night, with drier air arriving behind it with decreasing clouds.
VFR lowering to MVFR (IFR late at CHA) from the west through the period as moisture advects into the region ahead of midweek cold front. CDG Chattanooga Airport, TN 57 55 68 48 60 / 100 70 80 30 40 Knoxville McGhee Tyson Airport, TN 56 51 66 44 60 / 90 80 90 30 20 Oak Ridge, TN 55 51 66 43 61 / 100 80 80 30 20 Tri Cities Airport, TN 52 46 64 40 59 / 80 90 90 30 10 TN.
125 PM EST Mon Mar 2 2020 Weak cold front clearly deliniated in observations as a wind shift to westerly and as the back edge to IFR/MVFR stratus. Southeast Michigan positioned early this morning within a mild and steadily moistening low level environment, immediately downstream of an inbound weak cold frontal boundary now elongated from near Mt Pleasant to the southern base of Lake Michigan. A drier and slightly cooler post- frontal air mass will then mark conditions for the afternoon period.
1128 AM EST Mon Mar 2 2020 Warmer temperatures expected as high pressure moves off the coast. Rain chances will increase tonight through midweek as a cold front drops south.
/issued 916 AM EST Mon Mar 2 2020/ High pressure has shifted off to our east which has resulted in a return of southeast to south winds across the area and ending our 3-4 day cool down. Sufficient afternoon mixing will take place resulting in a slight suppression of dewpoints (between 50-60 degrees), warmer temperatures, and gusty winds this afternoon.
MVFR/IFR cigs will lift from west to east as a cold front continues to make progress across ERN OK and NW AR. /Issued 1030 AM CST Mon Mar 2 2020/ Cold front making its way through the forecast area this morning, and was roughly located from far NW AR to just southeast of Ardmore.
235 PM EST Mon Mar 2 2020 A weak cold front will stall out over northwest Pennsylvania tonight. An area of low pressure will then track north across the state on Tuesday. The weak cold front will stall over northwest PA tonight, bringing another mild night for March with min temps in the low to mid 40s most spots and the mid 30s behind the front over Warren/Mckean counties.
Coverage of SHRA/TSRA will be only isold today, then coverage will increase after 00Z as a low pressure wave moves along the front.
255 PM CST Mon Mar 2 2020 (Tonight and Tuesday) Afternoon satellite imagery depicts an upper level low pressure system spinning over southern California and the northern Baja. Meanwhile, a cold front is nearly stationary south of I-20, with temperatures in the lower 60s across the Big Country. Otherwise, expect mostly cloudy skies with lows mainly in the lower to mid 50s. During the day on Tuesday the Baja upper low will eject eastward into northern Mexico. closer to the upper low. Will keep the highest PoPs across the far western Concho Valley and Crockett Country where more numerous showers and thunderstorms could develop by the late afternoon and early evening.
1030 AM CST Mon Mar 2 2020 Cold front making its way through the forecast area this morning, and was roughly located from far NW AR to just southeast of Ardmore.
1029 AM MST Mon Mar 2 2020 Current surface map places trof/warm front across eastern Montana/Wyoming. South-southwest winds across the forecast area become westerly as trof moves into the central Dakotas.
318 PM EST Mon Mar 2 2020 The current surface analysis features an pseudo stationary boundary along the OH Valley and stretching south into the lower MS Valley. Over the next 36 hours the pattern will feature a couple disturbances ramping up along the southern stream as a deepening trough sets up along the northern stream. Thus will expect some ridge to valley differences. Some of the deeper valleys may drop into the low 30s for lows. at midweek, with a closed upper low over the Big Bend region of West Texas and a northern stream trough from Hudson Bay into the Ohio Valley.
232 PM EST Mon Mar 2 2020 Southerly flow will increase moisture across the region through Tuesday ahead of a cold front which will move through late Tuesday.
Closed upper low off the California coast translates eastward over the northern Baja tonight continuing eastward over the northern Mexican border Tuesday.
Will keep the High Wind Warning going through tonight. With winds over 70 mph the primary concern into tonight, decided to add blowing snow concerns to the High Wind Warning statement instead of a separate winter weather statement. Expect these concerns to gradually ease later today with the high sun angle this afternoon, although Elk Mountain and portions of I-80 around Walcott Junction may see blowing snow into early Tuesday morning since those locations observed more snowfall yesterday. May need to continue the High Wind Warning through mid Tuesday morning since high res models showing the llvl gradient only slightly weakening through 12z Tuesday. As winds ease across portions of Carbon county tonight, there may be some patchy fog in the lower valleys.
The next shot of precipitation and strong winds will come by the end of this week into this weekend as a low pressure system approaches the West Coast. A high-pressure ridge moves over CA/NV through midweek which will create dry conditions and warming temperatures. A low- pressure trough moving onshore may have a bit more atmospheric moisture than recent systems, but at the same time the upper-jet forcing for lift may not sync up well with the moisture.
529 PM CST Mon Mar 2 2020 The cold front has made it into southeast MO and southern IL this afternoon. Convection should initiate late this afternoon and early this evening ahead of the low across south central MO and move into southeast MO by 00Z. There will likely be a few thunderstorms across parts of southeast MO and southwest IL this evening with a possibility of small hail across Reynolds, Iron and Madison counties in southeast MO where the low level moisture and instability will be maximized with CAPE up to around 1000 J/kg around 00Z Tuesday. Colder low temperatures can be expected tonight over most of our area as lower surface dew points advect into the region behind the cold front, although the lows will still be slightly above normal for most of the region.
Clouds will then increase late this evening ahead of an upper-level trough and weak surface cold front. The clouds and light southwest winds overnight will result in above normal low temperatures in the low to middle 20s. Model guidance suggests a narrow band of precipitation will develop ahead and along the cold front and move from west to east across the forecast area. The light snow associated with the cold front will continue into late Tuesday morning before transitioning to a mix of rain and snow. By midday Tuesday, the upper-level trough will be overhead and the cold front will be exiting the region to the east. High temperatures will be above normal ranging from the upper 30s to the lower 40s.
With the jet stream split like this, leeside trough development will be weak across the Central High Plains, and this will result in fairly light winds through Tuesday Night. The two upper level jet branches will eventually coalesce into one primary polar jet and deep trough in the eastern CONUS by late week.
Out ahead of this is a warm frontal system bringing southerly winds through the Northland and a mid to upper level cloud deck this afternoon. A weak cold front will also trail behind this passing system keeping temperatures in the mid 30s with westerly winds at the surface. Cloud cover and spotty flurries will persist through Tuesday with light rain possible in northern WI due to their warmer temperatures.
448 PM EST Mon Mar 2 2020 A weak cold front will stall out over northwest Pennsylvania tonight. An area of low pressure will then track north across the state on Tuesday. The weak cold front will stall over northwest PA tonight, bringing another mild night for March with min temps in the low to mid 40s most spots and the mid 30s behind the front over Warren/Mckean counties.
642 PM EST Mon Mar 2 2020 A weak cold front will stall out over northwest Pennsylvania tonight. An area of low pressure will then track north across the state on Tuesday. The weak cold front will stall over northwest PA tonight, bringing another mild night for March with min temps in the low to mid 40s most spots and the mid 30s behind the front over Warren/Mckean counties.
/issued 255 PM CST Mon Mar 2 2020/ (Tonight and Tuesday) Afternoon satellite imagery depicts an upper level low pressure system spinning over southern California and the northern Baja. Meanwhile, a cold front is nearly stationary south of I-20, with temperatures in the lower 60s across the Big Country. Otherwise, expect mostly cloudy skies with lows mainly in the lower to mid 50s. During the day on Tuesday the Baja upper low will eject eastward into northern Mexico. closer to the upper low. Will keep the highest PoPs across the far western Concho Valley and Crockett Country where more numerous showers and thunderstorms could develop by the late afternoon and early evening.
The high resolution simulated radar composites suggest a couple small areas of light precipitation over the next few hours, however the overall trend in the areal coverage and strength of reflectivities will be on the decrease through midnight.
544 PM CST Mon Mar 2 2020 A weak cold front moved through the area this morning and should exit the state this afternoon. Cold front has pushed southeast of forecast area this afternoon. The trough axis should move east of the area by Tuesday afternoon bringing Mostly Sunny skies and rebounding temperatures back into the 50s. Tuesday Night a weak disturbance diving down the backside of the broad east coast trough may be sufficent to produce a flurry or sprinkle from Bloomington through Peoria and Galesburg.
Latest CAMS suggest discrete cells are possible south of the warm front across the northern tier of Mid-South counties.