Aikyam-Lab/Synoptic-Bench huggingface dataset:
600 PM CST Thu Mar 9 2017 A surface cold frontal boundary crossed through our cwa overnight/this morning. In the cooler airmass, afternoon temperatures were running nearly 10 degrees cooler than yesterday with readings ranging from the upper 40s in our northern zones to the mid 60s in the south. The low clouds will mix out in the west in the return flow on Friday with mid/high clouds remaining prevalent. Temperatures will trend below seasonal normals with highs averaging in the low 30s to mid 40s (northeast to southwest).
1000 PM EST Thu Mar 9 2017 Under clear to partly cloudy skies with a gentle to moderate easterly breeze, temperatures in the Keys island chain are in the lower 70s. High pressure over the southeastern States will continue to weaken overnight. With high pressure in control, near zero rain chances can be expected with just a FEW clouds AOA 025-030.
522 PM CST Thu Mar 9 2017 Winds will become more light and variable overnight before a cold front pushes through from northeast early morning. Overnight, a cold front currently in Kansas will accelerate south and enter our northeast counties around midnight. Also, weak isentropic upglide could wring out some light drizzle north of the front - although the low-levels dry out quickly behind the front so that potential also looks limited.
A mild westerly flow aloft will remain in place across the region through the upcoming weekend, followed by strong high pressure aloft across the western states for the first half of the week.
This scenario is producing freezing precipitation soundings from near Big Timber to Hysham. We will add a chance of freezing precipitation to the forecast for tomorrow, and mention it in the updated weather advisories/warnings.
High pressure centered off the southern California coast is bringing sunshine, light winds and milder than normal temperatures to the CWA this afternoon. This ridge will dominant the pattern for at least the next 7 days and keep our weather dry with nothing more than cirrus clouds from time to time through the period.
A few showers will be possible acrs the northern zones late tonight as a cold front approaches, with better chcs during the day Friday as the front sags south through the area. Guidance continuing to suggest a cold front dropping south into the area Friday associated with broad troffing aloft advancing across the east CONUS. Boundary advancing through will serve as a focus for some increased shower and thunderstorm activity during the day while allowing for somewhat cooler temperatures going into the weekend.
Changes in our weather pattern are occurring as a middle/upper trough is developing over south central Canada and the Dakotas and will move southeast through the Upper Great Lakes tonight into the Upper Ohio Valley by tomorrow morning. Low pressure develops over southwest Indiana this evening and move eastward allowing high pressure and colder air to move in overnight and Friday. As low pressure moves eastward and high pressure builds in from the northwest ending the precipitation from northwest to southeast going through the early hours of Friday morning.
A storm system then cold front will move through the region, and bring showers and thunderstorms to all Taf sites, especially northern and central locations.
513 PM MST Thu Mar 9 2017 With the front moving southward across the plains and the pressure gradient decreasing across southeast WY, went ahead and cancelled the High Wind Warning.
1001 PM EST Thu Mar 9 2017 Weak high pressure will build over the area overnight.
High pressure located over the eastern seaboard scoots to the southwest Thursday night into Friday, pushing over the Gulf of Mexico. This high pressure system hangs tight through most of the afternoon Friday.
320 PM EST Sun Nov 20 2016 Quiet weather for the next couple of days as deep layer moist cyclonic flow is gradually replaced by prominent upper ridging forced by continued western US height falls. This will in turn support a slight improvement in temps, especially southeast of the ridge, and perhaps a few hours of sunshine at least over the SE half of the CWA.
248 PM CST Sun Nov 20 2016 Rather progressive pattern progged over the next several days with a series of longwave trofs. upper ridge over the cntrl U. begins to break down in response to lead longwave trof pushing ashore over the west coast.
Models show a thicker 1000-850 mb layer tomorrow, suggesting high temps will be a few degress warmer than today - from mid 50s south to mid/upper 40s north. Winds will have settled by Monday night as the pressure gradient relaxes as high pressure builds in from the southwest.
High pressure will continue to dominate through the first half of the week as it translates further east and the next weak system takes shape across the Central Plains.
209 PM CST Sun Nov 20 2016 A large upper level ridge sits over the central portion of the country with an elongated area of high pressure extending along the Mississippi River creating dry conditions with average temperatures around the region. With clear skies temperatures will drop back down below freezing for most areas with the KC metro area staying slightly above freezing tonight.
A 1032 mb ridge of cold high pressure is bringing sunny skies to the Mid-South this morning. Cold high pressure is settling over the region. High pressure will be centered over the region today. Temps will be cool with highs in the lower to mid 50s.
/Tonight through Monday/ High pressure continues to slowly migrate eastward with the sfc pressure gradient tightening as low pressure develops across the western high plains into Monday. Warming limited some by southeasterly flow near the surface off the area of high pressure. This has limited warming today with temps remaining a degree to a few degrees cooler than expected, therefore knocked temps down a degree or so for Monday as well. Southeasterly flow remains in place at the surface and thermal gradient in the lower levels will stay just to the west of the CWA, this expect better warming in those areas.
Winds will be lighter tomorrow as high pressure builds over the region.
346 PM EST Sun Nov 20 2016 Cool high pressure will prevail into the middle of the week.
Current Situation and Analysis -- A cold front moved through the Florida Keys and adjacent coastal waters earlier today, and a cooler, drier air mass is filtering into the area. Currently, air temperatures in most Keys island communities are in the mid 70s, with dewpoint temperatures in the lower 60s. North winds have dropped off significantly since midday thanks to a Florida Peninsula mesoscale thermal trough. Dewpoint temperatures should drop down into the low to mid 50s by Monday morning as well. After one more night in the 60s (Monday night), a gradual air mass modification will ensue as an expansive continental anticyclone moves slowly eastward from the United States to the western North Atlantic.
although moist, southwest flow continues aloft, the region will remain underneath high pressure through the day. A low pressure trof will move over the West Coast today.
Tonight and Monday Weather overall to remain quiet for another 36 hours as high pressure is expected to slowly drift across the region. The 20z MSAS surface analysis showed a ridge of high pressure which extended from western Ontario south-southeast along the MN/WI border to the mid-MS Valley. Ridge axis to slowly move across WI on Monday with winds across central WI gradually veering toward an easterly direction by later Monday afternoon.
Much warmer along Urban Corridor and Palmer Divide. Readings around Denver extending to Limon could reach the lower to mid 60s while areas further to the north and ne stay in the 50s. There is strong southwesterly flow aloft for the CWA on Monday ahead of the next upper trough.
Our surface winds are showing the back edge of the ridge axis with still NE at MLU and S/SW over much of our Western half or so. However, we will will keep some freezing temps in play again overnight East and will dew points returning still in the 20s much of the area will be below average once again. Either way, all of our sites have reached or dipped below the freezing mark verifying last night's warning area wide.
353 PM CST Sun Nov 20 2016 A bit cooler last night than expected for northern areas of the FA. Light onshore winds are ex- pected to develop tonight and then strengthen by tomorrow after- noon as the next upper trof begins to move in from the west.
Am going on the lower side of guidance mainly inland sections since moisture is very limited and winds will be light. Not too much change from the previous forecast, but did go a tad cooler over the southern areas where clouds may come in during the afternoon to curtain optimal daytime heating.
231 PM MST Sun Nov 20 2016 Current surface map shows warm front across eastern Montana/western South Dakota. Warm front pushes slowly west overnight. Upper trof moves from the Rockies in the plains Monday night.
The cold weather looks like it's here to stay, despite a large ridge of high pressure building across much of the central U.
1251 PM EST Sun Nov 20 2016 High pressure builds into the region into Monday.
VFR conditions are expected to prevail today and tonight as high pressure remains in place. All reporting sites dropped to freezing or some were well below freezing. The Freeze Warning was allowed to expire earlier this morning but with another night of widespread freezing temperatures, even colder than last night, another one is in effect for tonight.
High pressure slowly pushing east across the region today will continue this slow trend tonight into Monday. Did lower temps tonight with more locations likely getting into the teens, with ridge overhead and clear skies supportive of colder temps below guidance. Next precip chances still anticipated going into midweek, with the arrival of the large upper trough and surface reflection over the central Plains. Confidence still on the higher side with precip occurring across the CWA during midweek, however, lower confidence with start time.
Upper air analysis this morning showed a ridge over most of the country with it's axis from Texas to Montana. At the surface, high pressure has moved to the east and winds were becoming southeasterly. The upper level ridge will move to the east as a trough moves into the west coast tonight. Monday the trough will move across the southwest approaching Texas Monday night. At the surface, high pressure will continue to drift toward the east and winds will be southeasterly.
Shorelines area along the larger lakes/TN River should stay a few degrees warmer. An upper ridge extending from teh western Gulf of Mexico northward through teh central Plains will shift east into the lower MS Valley by late Monday.
Surface analysis this afternoon places a 1029 mb ridge of cold high pressure over the Lower Mississippi Valley.
Still, most of the area will have lows in the lower-mid 40s, with some upper 30s in normally colder interior spots. High pressure ridge will hang back to the northwest, which will maintain a northerly wind flow. (from previous) High pressure to the north drifts eastward and across the Carolina coast during the mid week.
Tonight Through Monday A Pacific low pressure trough moving inland along the west coast will approach western Wyoming bringing light snow into the west this evening. Monday Night Through Sunday Snow and wind will continue across the western mountains and move east of the Continental divide as a cold front moves south from Montana.
1026 AM MST Sun Nov 20 2016 The upper level ridge over the area will shift eastward today as an upper trof approaches the west coast. Dry weather is expected thru the day across southeast and south central CO, along with highs that are about 10 degrees above average in the high valleys and at least 15 degrees above average over the southeast plains. Tonight the upper trof will move over CA, and moisture ahead of this system will move into CO.
Updated forecast with changes to POP and QPF grids through A weather system is expected to impact the area over the next couple of days with cooler temperatures and precipitation chances. Once the cold front pushes completely through, precipitation may have a better chance of reaching a majority of the district. In addition to the rain and snow, a good area of instability will exist with the cold air behind the cold front. By Monday night, the storm will have pushed east and allowing a weak ridge to move into the area.
1221 PM EST Sun Nov 20 2016 Northwest winds around a large low pressure system in the Maritimes will persist through the day.
301 PM CST Sun Nov 20 2016 At h5 deep trough along the west coast with strong ridge over the Rockies and strong closed low over the northeast CONUS. Dry conditions continue as an upper level ridge continues to build over the central US. Recent snowpack combined with warmer temperatures aloft could allow some patchy fog to develop in this location. Overnight lows remain below guidance as recent snowfall will continue to keep temperatures cooler than anticipated. Lows drop into the low to mid 20s. Despite the increasing clouds, temperatures will still rise into the low 50s. Nam is colder and the availability of cooler air with this system will determine precipitation type.
A weakening and stretching upper level trough over the eastern Pacific will slow shift east during the next 24 hours. Snow levels will run between 4000 and 5800 feet through this evening, then the higher end of this range will lower to near 5000 feet overnight.
A weather system is expected to impact the area over the next couple of days with cooler temperatures and precipitation chances. Once the cold front pushes completely through, precipitation may have a better chance of reaching a majority of the district. In addition to the rain and snow, a good area of instability will exist with the cold air behind the cold front. By Monday night, the storm will have pushed east and allowing a weak ridge to move into the area.
Temperatures will continue to be slightly normal than average with highs in the 40s and overnight lows near freezing. An elongated 500mb trough along the Pacific coast will slowly move inland this afternoon and evening which should provide the upper level support to increase precipitation coverage as the precip band over the Basin reaches the WA/ID border. A slow moving 500mb trough moving inland will be the primary driver for precipitation this afternoon and evening. As the axis of this upper trough crosses the Cascades, a subtle shift in the low level flow is expected.
Look for another cold night tonight with temperatures falling into the low to middle 20s for everyone. Dry conditions will continue for the next couple of days as high pressure takes hold across the eastern CONUS.
Better mixing today has promoted warmer temperatures with a few locations approaching 60 degrees. Monday the upstream energy moves into central Montana in a couple of weak pulses slowly moving a weak upper level trough into the area by evening. Better chance for shower activity in the evening for the lower elevations as downslope weakens for a while and upper level trough is moving through the area. Models show best chances for moisture over the higher terrain but expect any amounts to be light and not expecting more than an inch or 2 of snow above 6000 feet.
As high pressure creeps past the area through tonight, winds will remain light and gradually shift to a more srly direction. Morning lows were around freezing north and in the middle/upper 30s south. Current temperatures are now in the lower 50s, but will warm to highs in the lower to middle 60s this aftn. Obs depicting a fairly significant temperature gradient ranging from the low 30s in the AEX area to the mid 40s at BPT. Surface analysis showing cold high pressure ridging across east Texas and through the mid and upper Mississippi valleys. Aloft, broad ridging envelops the mid-conus behind troffing exiting the eastern seaboard.
348 PM EST Sun Nov 20 2016 Low pressure will intensify as it moves into southern Quebec tonight.
355 PM CST Sun Nov 20 2016 High pres ridges over the lower MS valley today, resulting in light easterly winds acrs the area. As a result, conditions are rather pleasant this aftn with temperatures in the lower to middle 60s. Winds will gradually shift more southeasterly, and this will bring a return of low lvl moisture that will help moderate overnight lows and lead to warmer more humid daytime conditions. Temperatures this morning ended up a few degrees cooler than anticipated, and although lows may be a degree or two warmer tonight than last night, some spots acrs central LA could see a light freeze by Monday morning.
Cold temperatures are expected again tonight, as the core of the high moves into the region. That WAA will be associated with southerly winds ahead of low pressure developing over the central plains.
322 PM CST Sun Nov 20 2016 The upper level ridge responsible for our gorgeous blue skies and warmer temperatures today will begin to break down on Monday, allowing the approach of an upper level trough. Models are in fairly good agreement on the placement and strength of this trough by the end of the forecast period, with the center over central AZ. Lift associated with the upper trough will pass over the area Monday evening.
312 PM EST Sun Nov 20 2016 A large area of low pressure will cross the area tonight and Monday.
300 PM CST Sun Nov 20 2016 A 1030 mb high pressure ridge sprawled across the MS river valley, wil drift slowly eastward across IL and into IN by sunset Monday. Meanwhile an upper level ridge over the High Plains will drift east toward the MS river valley by early Monday evening. The low stratocumulus clouds (bases 3-4k ft) will stay ne of Hoopeston/Vermilion county rest of today, associated with strong 523 dm 500 mb low exiting over New England.
Low temperatures tonight will dip down into the lower 20s. On Monday, high pressure moves into the area providing clearing skies and a gradual moderation in temperature that will bring high temperatures into the lower 40s.
High pressure slowly pushing east across the region today will continue this slow trend tonight into Monday. Did lower temps tonight with more locations likely getting into the teens, with ridge overhead and clear skies supportive of colder temps below guidance.
Accumulating snow is likely through Monday north of Interstate 80 and in the high terrain.
The central part of the state appears to be the favored location for the lower visibilities and have gone with areas of fog in that region.
235 PM EST Sun Nov 20 2016 High pressure builds into the region into Monday.
1225 PM EST Sun Nov 20 2016 A trough of low pressure extending southwest into lake erie will finally weaken by monday night.
SHORT TERM (Tonight through Monday Night):500 mb ridging will prevail over the RGV throughout the short term period and will shift to the east somewhat as a West Coast trough axis pushes into the Desert Southwest. The approach of this trough axis will spin up a surface frontal system over the central Plains states tomorrow which will in turn increase the WAA from the southeast pretty quickly.
127 PM MST Sun Nov 20 2016 Broad upper-level ridging remains intact over much of the western/ central CONUS this afternoon.
345 PM EST Sun Nov 20 2016 High pressure building into the area from the west will continue the cool and dry conditions through mid week. Low pressure progged to track through the Great Lakes Thu, as a cold front passes through the local area between 12-18Z.
Shorelines area along the larger lakes/TN River should stay a few degrees warmer. An upper ridge extending from the western Gulf of Mexico northward through the central Plains will shift east into the lower MS Valley by late Monday.
Snow to spread into the Continental Divide Region Tonight- Upper trof is entering the west coast this evening with southwest flow increasing over CO ahead of the system. This leading wave will start to spread snow into the eastern San Juan mountains after 06z with snow ramping up through tomorrow as southern stream portion of the upper trof swings through southern CA into UT and northern AZ by 00z Tues. Gusty southwest winds could cause some local blowing snow across the higher peaks. the higher peaks of the Sangre De Cristo range may see a round of snow late tonight-Monday morning. Highs tomorrow will be a little cooler given more cloud cover and cooling temperatures aloft associated with the upper system.
Sfc ridging which was directly ovhd last night has shifted east of the region this morning and this is allowing for sse returning flow along the backside of the ridge. The fresh Canadian high pressure remains sprawled over the four state area with last hour obs showing 1033mb at Temple TX and also NE of Little Rock AR.
Overnight lows should be a few degrees warmer than last night across most of the CWA. Mid/high clouds will increase by late afternoon due to the increasing moisture and lift associated with a developing low pressure system over the plains.
Active weather across the Bay Area today as a cold front continues to move SE across Monterey county at this times. In its wake, an upper level trough will sweep through bringing additional showers and possible thunderstorms today. This shower activity is associated with the main upper low and much colder airmass aloft. As the trough moves inland today expect shower activity to increase. If a thunderstorm develops, freezing levels drop to 6-8k feet this afternoon so small hail cannot be ruled out. Shower activity will taper off tonight as the upper trough axis moves off to our east.
1032 AM MST Sun Nov 20 2016 Upper ridge will dominate the weather today and tonight with light winds, scattered cirrus and mild temperatures in the upper 50s to middle 60s this afternoon. The next feature to affect the forecast area is the upper trough currently moving onshore along the West Coast as seen in weather vapor imagery.
Snow levels have risen to 5500-6500 feet this afternoon, and will remain fairly high through this evening before dropping to around 4500 feet behind a cold front passage tonight.
The lighter winds today are compliments of 1032 mb high pressure ridge over the MS river valley, that will drift east over IL this afternoon. Sprawling ridge of high pressure extending from Manitoba southward to Texas will dominate the weather across central Illinois today, providing sunny skies and cool conditions. Despite full sunshine and lighter winds, temps will be a couple degrees cooler thanks to a colder start to the day and limited mixing beneath the subsidence inversion only up to about 925mb. Another cold night is expected tonight as the high shifts eastward across Illinois.
258 PM CST Sun Nov 20 2016 An elevated warm frontal boundary will move east across southern Manitoba into northwest Ontario, bringing broken to overcast mid- level clouds across northern Minnesota into northwest Wisconsin this evening. A mix of sun and clouds to start off Monday, but clouds will gradually be on the increase from west to east associated with a stronger warm frontal zone pushing northeast across the northern plains into the Canadian Prairie associated with a developing low in southern Saskatchewan.
1242 PM MST Sun Nov 20 2016 Upper ridge will dominate the weather today and tonight with light winds, scattered cirrus and mild temperatures in the upper 50s to middle 60s this afternoon. The next feature to affect the forecast area is the upper trough currently moving onshore along the West Coast as seen in weather vapor imagery.