Aikyam-Lab/Synoptic-Bench huggingface dataset:
Low pressure near the northeastern corner of the country had lifted into Quebec with weak high pressure across the central Gulf of Mexico. Sunny and dry conditions are expected with highs in the lower 80s along the coast and into the mid 80s for the interior. High pressure from the southeast states into the central Gulf of Mexico will keep a light pressure gradient across east central FL allowing for inland movement of the east coast sea breeze into the interior in the evening and then light westerly flow overnight.
Weak low pressure moving along a stationary front along the Ohio River is moving eastward through tonight. High pressure will move in tonight clearing skies for the most part. Warm front will approach area Monday afternoon increasing the chance for some light rain showers Monday afternoon/evening.
A cold front being analyzed from north central Montana to northwestern Wyoming, into southern Idaho.
349 AM PDT Sun May 7 2017 Cooler with a chance of mountain showers and thunderstorms today with gusty north winds.
High pressure will quickly build in from the west today at the surface, though the area will remain under NW flow aloft (which will help to reinforce the cooler air mass).
Cold front extending from near Colstrip north to Swift Current bisecting Garfield and Valley counties early this morning. SOuth of that airmass is a closed low over the Baja and southern Arizona. Farther west another closed low sets over the Gulf of Alaska.
418 AM MDT Sun May 7 2017 Currently around 4 am, Water vapor imagery showed upper low over southern California. Models place the upper low pressure system over the California Baja on Mon, providing a constant southerly feed of warm air and moisture for the forecast area. Scattered convection over the higher terrain early in the day is expected to then spread across all of the area through the aftn and eve. Temps will warm into the 60s and 70s for much of the area, while the far eastern plains will climb into the lower to mid 80s.
317 AM MDT Sun May 7 2017 Some mid and high level clouds over mainly the western parts of the CWA this morning moving northward in southerly flow ahead of an upper low currently along the SoCal coast.
244 AM MDT Sun May 7 2017 Latest water vapor imagery shows the upper ridge extending through the western Dakotas is beginning to break down with mid and high level moisture being pushed northward through the Rocky Mountains. At the surface, there is an area of low pressure in southeastern Montana with a lee trough extending through eastern Wyoming and a warm front developing across western South Dakota.
326 AM EDT Sun May 7 2017 High pressure will remain in full control of the weather today and into much of the week across west-central and SW Florida. As an upper low across the northeastern U. continues to move to the NE, upper ridging will build in across the area.
Temperatures have climbed to near 90F near a thermal ridge over eastern Montana and far western ND. Winds will again be gusty east of the trough, similar to slightly lower than today. Sharp upper level ridge axis will continue to slowly nudge east as it is influenced by a closed low over the Desert Southwest and associated energy ejecting out of it. Behind the ridge, south to southwest flow aloft will allow embedded impulses to influence our weather Sunday night into Monday with scattered showers and thunderstorms.
331 AM CDT Sun May 7 2017 Upper ridge over the area will give way to approaching cut off low located over Srn CA this morning.
Large upper low off of southern California will track eastward to position over southern Nevada by 6 pm Sunday. Deep southerly flow aloft continues to be indicated across the region as the old upper low across southern Arizona digs south and east into old Mexico through the day Monday. Models also indicate another embedded short wave rounding the base of the low and translating across the Southern and Central Rockies Monday and Monday night. Although models remain good agreement of synoptic features, they differ with surface features, with the latest NAM faster and further south with a cold front sliding across the Eastern Plains Monday morning, which then stalls south of the Palmer Dvd Monday afternoon.
335 AM MDT Sun May 7 2017 The strong closed low near San Diego will meander over southern CA today and eventually move south to the northern Baja peninsula tonight. A strong ridge will remain over the midwest.
535 AM EDT Sun May 7 2017 Low pressure will maintain precipitation chances early this morning before building high pressure returns mainly dry weather through the first half of the week. A mid/upper trough should maintain rain chances across the area early this morning. Some of the higher elevations could see some light snow with cold advection, though any accumulation is expected to be minor.
321 AM CDT Sun May 7 2017 Upper ridging will keep the region fairly quiet. There is an upper wave rounding the ridge leading to mid-clouds east of the valley, and potentially sprinkles. Anticipate these clouds will slowly diminish through the day as the upper level ridging works into the region. Temperatures the past few days have been able to get warmer than expected, likely due to the 'pre green up' (dry) conditions.
251 AM PDT Sun May 7 2017 Low pressure drops slowly south this afternoon with residual showers and a few thunderstorms possible for the Sierra and western Nevada. Snow showers may impact the higher terrain in Tahoe and the eastern Sierra through midday.
A weak front moving in is currently shifting winds to more north-northeast just north of the Highway 82 corridor and will move in the next hour or so in that area then around 12Z in the I-20 corridor. /12/ Prior discussion below: Today through tonight: The pleasant conditions will continue for the remainder of the afternoon and into this evening as high pressure at the surface sits in place across the forecast area under northwest flow aloft. Lows tonight will remain on the cool side as they fall into the low and middle 50s.
234 AM EDT Sun May 7 2017 Drying out and remaining cool under increasing high pressure influences. A wet and warmer system for mid and late week. Clouds and remaining rain showers/mountain snow showers will exit this morning as upper level low pulls eastward. With a dry airmass in place, insolation will help the max temps along today wile 850mb temps reside in the low single digits. The temperatures tonight are easily there in the low to mid 30s. Models are showing a quasi stationary front south of the area that slowly lift north as a warm front.
SHORT TERM (Now through Monday): A deep upper level low pressure system will continue to move southeastward over southern California with strong ridging affecting the middle portions of the country. At the surface, high pressure remains over the northern Gulf of Mexico, providing moderate southeasterly flow across Deep South Texas. Cloud cover will continue to increase on Monday, which will result in slightly cooler temperatures during the day.
333 AM EDT Sun May 7 2017 Drying out and remaining cool under increasing high pressure influences through Monday. A wet and warmer system for mid and late week. Clouds and remaining rain showers/mountain snow showers will exit this morning as upper level low pulls eastward. With a dry airmass in place, insolation will help the max temps along today wile 850mb temps reside in the low single digits. The temperatures tonight are easily there in the low to mid 30s. The deep upper trough over the eastern third of the nation lifts out Monday.
122 AM EDT Sun May 7 2017 Strong low pressure over northern New York will continue moving away from the region with the upper level trough lingering over the eastern US.
400 AM EDT Sun May 7 2017 An upper level low pressure trough will cross the region this morning. Cool high pressure will build in from the northwest through Monday.
High pressure will build this afternoon into Tonight.
222 PM MST Sun Feb 4 2018 Northwest flow aloft continues as the main axis of the upper trough pushes through the Midwest. Center of arctic high pressure has pushed southeast of the CWA with return flow just setting up. Cooler air will slide back in from the north. Two inches or less of snow is expected with the highest amounts over northwest South Dakota. Models indicating the potential for some very light freezing rain around portions of northeast Wyoming into the Black Hills area late tonight as 850mb temps above freezing push in. Any freezing rain will quickly turn to snow by 12z as the colder air moves back in. Warmer temps will push in toward the second half of the week.
After sunset, northerly winds will increase and as the low-levels cool, low clouds will develop. The cold front moves across our area tonight, however a mixed airmass with winds of 10 to 15 mph and increasing cloud cover will keep lows above normal.
246 PM EST Sun Feb 4 2018 A low pressure system crossing the Midlands will move east of the area by late this afternoon.
1209 PM CST Sun Feb 4 2018 A cold front has moved through the terminal sites this morning. /Issued 535 AM CST Sun Feb 4 2018/ Surface winds will shift to northeast and east as cold front arrives. Large spread in high temperatures today with northeast sections struggling to rise above freezing, while southwest expected to reach the lower 60s. By late Monday afternoon, however, next cold front arrives in northern sections, sweeping through all of forecast area Monday evening.
222 PM CST Sun Feb 4 2018 An area of high pressure at the surface will drift from South Dakota and Nebraska east into Illinois by Monday morning. The position of the high will keep skies mostly clear over central Wisconsin through the night with temperatures dropping into the single digits below zero. The winds will come around to the southwest on the back side of the high with speeds generally in the 5 to 10 mph range. The short wave trough just off the Pacific Northwest coast today will rapidly move southeast in the strong northwest flow aloft.
The highlight in the short term period - frigid temperatures with an ongoing wind chill advisory advertising dangerous wind chills to 40 below zero through the morning. Despite a sunny sky today with high pressure dominating, brisk northwest winds of 15 to 25 mph combined with high temperatures in the single digits above zero, will yield wind chills between 10 below and 25 below zero this afternoon.
Another round of more intense snow can be expected along the cold front as it cross tonight. starting across eastern Ohio mid-evening and east of the ridges a couple hours after midnight. locally 3" in the higher terrain. Temperatures will be 10 to 15 degrees below normal in the wake of the fron on Monday with dry conditions under building high pressure.
Scattered showers stretch from around Brunswick southwestward to around Live Oak this afternoon, and ambient southerly flow is gusting to near 30 mph outside of storms as low pressure deepens across southern Georgia, Cloud tops have warmed across southeast Georgia, and only a few lightning flashes have been observed the last hour. Behind the precip, drizzle and patchy fog may linger into the early morning hours across the area, gradually clearing out from north to south as drier air filters in behind the low. Overnight lows will be fairly similar to last night's - low to mid 40s across southeast Georgia and the low 50s across northeast Florida.
359 PM EST Sun Feb 4 2018 A cold front will approach the region this evening, and cross our area overnight.
203 PM MST Sun Feb 4 2018 High pressure will continue to affect the Southwest with well above normal temperatures this week. Latest runs of the operational GFS continue to suggest a trough will close off across the region, resulting in widespread ascent along with higher precipitation chances and lower temperatures. Broad troughing continues over much of North America with a high amplitude ridge centered just off the West coast. Of note, a region of weak low pressure continues to the south of the mid latitude anticyclone (within the ridge). The models show a series of short waves (some of them very weak) tracking through the Interior West this week as they slide down the eastern side of the ridge.
326 PM CST Sun Feb 4 2018 Earlier thin line of convection has moved out into the Gulf of Mexico and the actual cold front is near a Crestview Florida to Houma line.
258 PM CST Sun Feb 4 2018 Cold front movg into the Red River Valley attm with north winds 10 to 20 mph with fropa. Returning warm front will bring rapidly deepening mstr in sw flow back across area late Monday night.
237 PM CST Sun Feb 4 2018 Temperatures this afternoon were mainly in the low and mid 50s with mostly sunny skies this hour. A cold front had just moved into Randolph and Clay counties with some increased cloud cover. the combination of the passing cold front with a descending jet streak across the Lower Missouri and Ohio Valley will bring light sprinkles and snow showers to the northern half of the CWA starting in a couple hours and into the evening as winds veer northerly and increase to 15 to 25 mph. High pressure crossing the Midwest tomorrow will bring a brief period of dry weather with light northeast winds becoming southerly by sunset.
203 PM CST Sun Feb 4 2018 Upper pattern has a broad trough extending from from Great Lakes down the Mississippi valley with an upper ridge centered off the coast of CA. As this trough slowly moves east look for zonal flow to set up across the country with mild wx expected.
1252 PM EST Sun Feb 4 2018 A low pressure system will cross the area this afternoon.
1148 AM CST Sun Feb 4 2018 /18Z TAFS/ A weak cold front will move across the area this afternoon and evening, with northeast winds prevailing in its wake. Otherwise, a weak cold front will move across the area this afternoon turning winds around to the northeast.
SHORT TERM (Now through Monday night): A cold front across the Texas/Oklahoma border this afternoon will move through central TX this evening and through south TX tonight before moving into the CWA late tonight. The front appears to stall across northeast Mexico and just offshore the lower TX coast Mon afternoon. Will continue to see some isolated showers across the CWA Mon night before the warm front lifts northward. Believe the bulk of the cold air will remain well to the north of the RGV tonight into Monday but will go at least of couple of degrees cooler than the MOS temperatures tonight into Monday.
The warmer temperatures around KMSY, KASD, KGPT and KHUM should assist with CIGS rising closer to VFR while eventually decreasing to a scattered lower cloud deck as the afternoon progresses, but the more northern airports that are currently in the more widespread and lower stratus will likely take a bit longer to scatter out and clear depending on how fast the current clearing line advances south or if erosion from the south occurs.
444 PM EST Sun Feb 4 2018 Low pressure will be moving farther away from the forecast area tonight. The pressure ridge approaching from the west will extend trough the area Monday night.
A weak and shallow cold front is pushing across the northern part of the Hill Country as of this writing. A low level cloud deck along the leading edge of the cold front will affect the northern Hill Country and areas east of Highway 71 later this afternoon and evening. Monday is going to be cooled with highs in the low to mid 50s across the eastern two-thirds of the area and in the lower 60s along the Rio Grande.
1111 AM CST Sun Feb 4 2018 Cloud deck behind a cold front continues to make progress across the TX Panhandle. /issued 335 AM CST Sun Feb 4 2018/ Longwave trough over eastern North America will broaden mid-week and amplify a bit as a wave skirts the back side of western ridge and digs into the south-central U.
Skies will clear this evening with the passage of a cold front. Currently we have the old cold front that was in the gulf move back north last night to around the I-10 corridor before stalling. On top of all of this a cold front in Arkansas will drop down making the coast by this evening this will push the moisture back into the gulf with overnight temperatures dropping into the 40s to start the new work week.
Strong high pressure will remain in place near the West Coast through the remainder of the week, maintaining unseasonably warm daytime temperatures across the region. Another quiet weather day forecast across our region with a ridge of high pressure along the coast and the main storm track well to our north.
155 PM CST Sun Feb 4 2018 A quick hitting upper level system with an upper level trough axis now over eastern KS and northwest MO will move through the region over the next few hours. High res models weaken forcing somewhat as it moves in, but could see a quick 1-2 inches with the higher amounts over the nw quarter of our forecast area. It will clear out quickly tonight as strong high pressure moves in.
SFC Obs also show temperatures above freezing under southerly flow and associated warm air advection. Therefore, expect mainly rain with some freezing rain across extreme southwest VA this morning and over the northeast mountains tonight where temperatures will be freezing or below. A cold front reaches the OH River tonight by 00Z. Any left over snow showers should be just about over across the Mountains by Monday morning, with drier air and high pressure building in. Temperatures will dip well below normal for Monday, but the high slips to our east rather quickly and weak warm air advection should begin Monday night.
Nice slug of low level thermodynamics ahead of the wave (upglide on the 280:295K sfcs, 850 mb warming) with some north- south sloping frontogenetic response north of a sfc warm front. Outside of this snow threat, some indications that an upper level trough will slide across the region late Tue/early Wed. Will then be watching low pressure spread snow into the area from west to east later Monday morning which will likely reduce the visibility into MVFR range at KRST by 15z.
132 PM EST Sun Feb 4 2018 A low pressure system will cross the area this afternoon.
Offshore high pressure and a thermal trough along the coast will both persist into the middle of the week.
254 PM CST Sun Feb 4 2018 (Tonight and Monday) Quiet weather will continue the next 24 hours, with cooler temperatures for Monday. A backdoor cold front currently situated along the Red River to our north will drop south across the area this evening, before washing out early Monday.
303 PM EST Sun Feb 4 2018 Currently - The last vestiges of a ridge remains near the Florida Keys, resulting in light southeast to south breezes. Warmer drier air through the lower levels has squashed the last vestiges of shower activity in the Florida Straits. A new high pressure system spreading into the eastern United States on Monday will bring in an increasing synoptic scale northeast breeze. High pressure over the eastern United States will quickly migrate eastwards into the Atlantic and far out to sea over the next couple of days.
Some of the ridge tops may experience dense fog. The low clouds will likely be with us through most of this afternoon as well with the clearing line will near the MS River. By early Monday, the high pressure system associated with this modified polar airmass will have arrived over the MS/OH/TN Valleys bringing much drier and cooler air. Sunny conditions and diminished winds will allow for further modification to the airmass along with a return to southerly flow as the high pressure system begins shifting east. As a result, daytime highs should be in the low to mid 40s (cooler to the north over southern middle Tennessee). The quick movement of this high to the east is mainly due to the approach of a positively tilted elongated trough stretching from the Intermountain West to the Upper Midwest.
Blocking ridge remains in place just off the West Coast, pushing storm track well to the north.
Another round of snow showers can be expected along the cold front as it cross tonight. starting across eastern Ohio mid-evening and east of the ridges a couple hours after midnight. Temperatures will be 10 to 15 degrees below average on Monday with dry conditions under building high pressure.
Early this morning a cold front was over northeast and east central CO, and working its way south and west. As a result of the frontal passage, temps will be cooler today acrs the southeast plains, but the highs will be a little tricky. At this time, it is looking like highs today could range from the lower 30s along the eastern border, to the lower 50s over the srn I-25 corridor. The rest of the mtns and the high valleys are expected to have dry weather today and mild temps.
1253 PM EST Sun Feb 4 2018 snow showers will occur as a cold front moves through late this afternoon into the evening.
Strong high pressure will remain in place near the West Coast through the remainder through the week, maintaining unseasonably warm daytime temperatures across the region. Another quiet weather day forecast across our region with a ridge of high pressure along the coast and the main storm track well to our north.
Northwest flow aloft dominates throughout the forecast period due to a large, stubborn upper level cyclone over the Hudson Bay/northeastern Canada. The passing trough will allow for breezy northwest winds of 10-20 mph to form during the day Monday making for a chilly day and perhaps some drifting snow in open country.
MVFR ceilings will affect the northern terminals through late afternoon behind a cold front moving through the region. /Issued 1034 AM CST Sun Feb 4 2018/ Surface cold front is making steady progress southeast this morning, with moderate pressure rises behind the front in Kansas and the OK panhandle. Have lowered temperatures across the far southeast, as fog and low clouds are keeping the temps in the low to mid 40s, and little recovery is expected.
Surface winds generally NW 5-15 kts, with gusts 20-30 kts in the Magic Valley, and over ridgetops. Precipitation chances increase late this afternoon into tonight ahead of an upper short wave trough entering the Pac NW.
A 130-kt jet is pushing into the northern plains in northwest flow, between a broad trough to the east and a ridge to the west. Satellite shows cloudy skies over SD and northeastern WY, but a line of clearing is moving down from ND with high pressure. Snow will end from north to south early this morning, as high pressure pushes into SD. Temperatures there will be warmer, in the 20s, while western SD will be in the teens. Most of the precipitation will be snow, but some WAA across northeastern WY/southwestern SD may result in a mix of rain/snow or a little freezing rain. SREF precip type and NAM/GFS soundings support this, so added a mention of some freezing rain for a small area from 06-12Z Monday.
1246 PM EST Sun Feb 4 2018 Rain and snow will return to the area today with crossing low pressure. Warm advection ahead of the low should result in a mix or change over to rain from PIT S. The exception would be the Laurel Highlands and Garrett county MD where the highest terrain should stay mainly snow. Areas N of I 80 and the higher elevations should see 2 to 4 inches of snow through Sunday evening, with locations above 2500ft an inch or so more. Precip will become all snow this evening as the low's associated cold front crosses. Scattered snow showers are expected after FROPA with upper troughing and cold NW flow. Snow showers will taper off late tonight as high pressure builds in.
Sunny skies across western and central ND this Sunday afternoon under exiting Arctic high pressure.
225 PM CST Sun Feb 4 2018 A brief period of clearing is showing up over the mid state between lobes of the upper trough today. Monday will be dry and a bit cooler with highs in the upper 30s to mid 40s before the next trough impacts the region.
Afternoon high temps will remain above normal climbing into the 50s and low 60s especially over the lower columbia basin.