Aikyam-Lab/Synoptic-Bench huggingface dataset:
558 PM EST Sun Dec 4 2016 Upper trough swinging across the Midwest this hour, with an area of rain falling out ahead of it. That trough axis will shift east of the region this evening, with lingering rains/drizzle possible trailing behind it for a few more hours. High pressure will move over our region, being centered near Louisville by daybreak Monday. Cloud cover should keep us from getting too cold in the light winds drifting around this high.
439 PM MST Sun Dec 4 2016 updated aviation discussion A warmer night is in store for eastern Utah and western Colorado with increasing mid and high level moisture bringing mostly cloudy to cloudy conditions back into the area. However, impacts from wind driven snow will be felt, especially over the higher passes with gust potential to 50 mph or better.
/issued 203 PM CST Sun Dec 4 2016/ An upper low over Mexico will provide more precipitation chances over southeastern New Mexico and west Texas tonight and Monday, or at least through Monday morning.
424 PM PST Sun Dec 4 2016 Sunny and warmer today with locally gusty Santa Ana winds diminishing this morning.
The combination of the low and continuing upper support will keep widespread shra with isolated thunder going for much of the night with a gradual tapering from the west late. There may be a brief break in SCA conditions later tonight as the low passes but overall poor marine conds will persist into Monday.
The initial weather maker for eastern Kentucky will be an area of low pressure aloft, that is expected to move across the region this afternoon through the overnight period. The rain should finally begin to taper off after 4Z tonight, as the upper low moves off to our east. After several hours of quiet weather, another area of low pressure is forecast to approach the region from the southwest Monday afternoon and evening.
715 PM EST Sun Dec 4 2016 High pressure will cross the region tonight then move to the east Monday morning. A weak trough of low pressure will move across the area Monday afternoon into Monday evening.
Activity is showery in nature but overall expect a wintry mix of light snow, drizzle, and freezing drizzle to continue at times tonight. Initially expecting virga and a light or scattered mix of rain, snow, and a few spots of freezing rain/drizzle this afternoon. When the even colder air arrives with the more serious low pressure trough later on Monday, the clearing line of lingering snow showers will push through our SE zones through Monday afternoon and evening, making way for the very cold arctic air mass which will dominate the region for most of the week.
Northwest sites may briefly see some freezing rain late tonight, but temperatures should for the most part remain above freezing. /issued 359 AM CST Thu Dec 22 2016/ A cool area of high pressure will continue to drift southeast, placing Oklahoma/north Texas into a return-flow pattern later today. The western/northern parts of the rain area tonight will reach areas that may be at/below freezing. As a result, there is a possibility of freezing rain, although accumulations should be minimal, if any.
1238 PM EST Thu Dec 22 2016 A dry cold front will approach from the northwest today then push through tonight.
1236 PM EST Thu Dec 22 2016 Aviation A large area of high pressure over the Central Plains will track eastward today. A weak area of low pressure will track northeastward out of the Southern Rockies and through the Western Great Lakes Region Friday night. The low pressure system that heads our way is currently moving into the Southern Rockies. Based on the track of this low. Initially the temperature is expected to be several degrees above freezing as the precipitation moves in later Friday. the temperature will likely lower to around freezing. A brief period of tranquil and dry wx will continue through Christmas Eve with a ridge of high pressure still in place.
with a cold front pushing into southern Louisiana this morning. and high temperatures will be around 10 degrees cooler than yesterday for most areas. a warm front will lift across the region on Friday. ahead of an approaching cold front.
Winds will be near 10 kts today behind a departing front, but will become light after sunset as high pressure builds into the area.
1217 PM CST Thu Dec 22 2016 Cold front still edging slowly toward the coastal areas.
Highs will range from the lower 50s northeast to the lower 60s south. /17/ Prior discussion below: Some patchy drizzle in addition to some very light showers was observed across the south half of the region on radar, which was associated with the cold front. /17/ Prior discussion below: Today and Tonight: As of this morning, a low pressure system spinning over the Baja Peninsula was bringing rain to parts of the Desert Southwest. Drier air behind the cold front and weak ridging aloft will allow for skies to clear somewhat and temperatures to climb back into the upper 50s to low 60s today.
Over the west, just about to lose deeper moisture/ice in clouds, so may see flurries or freezing drizzle through daybreak. As the low over Georgian Bay continues east and another low tracks across far northern sections of Saskatchewan and Manitoba, milder westerly pacific flow will surge across the area by this aftn. Pressure gradient remains tighter tonight as low pressure deepens over Manitoba and high pressure slides across Ohio Valley toward East Coast.
moisture advection northward strengthens as a warm front pushes north.
A cold front is over Southern Texas while an upper level trough is over Western Arizona/Sonora state of Mexico.
243 PM CST Thu Dec 22 2016 The northern edge of the lower clouds was just north of I-85 this afternoon, and it will continue to shift southward through the evening hours as drier air advects southward behind a cold front.
1225 PM EST Thu Dec 22 2016 A cold front moves through the region today, followed by high pressure building to the south for Friday.
A cold front is located across portions of East Tennessee back through Northern Alabama and Central Mississippi this morning. A 1034 mb ridge of high pressure is resulting in sunny skies and temperatures as of 10 am CST predominantly in the 40s at most locations. /issued 435 AM CST Thu Dec 22 2016/ A cold front over north Mississippi will continue pushing southward into central Mississippi this morning. The slightly cooler and drier airmass behind the front will provide a mostly sunny day with temperatures lower than yesterday.
1147 AM CST Thu Dec 22 2016 The current surface map has a large high pressure centered over the Central Plains and a ridge into MN and northwestern WI. Much drier air associated with this high has been steadily eroding clouds from west to east. Upper level ridging and warm air advection will already begin in the wake of this system, with H5 heights building throughout the end of the work week.
125 PM EST Thu Dec 22 2016 A weak cold front will cross the region this afternoon and shift off the coast early this evening. High pressure returns tonight through Friday.
1250 PM CST Thu Dec 22 2016 Noon temperatures were already running 2 to 3 degrees warmer than the previous forecast. with a cold front pushing into southern Louisiana this morning. and high temperatures will be around 10 degrees cooler than yesterday for most areas. a warm front will lift across the region on Friday. ahead of an approaching cold front.
251 PM CST Thu Dec 22 2016 Temperatures this afternoon are significantly cooler than yesterday due to last night's cold front, with highs expected to top out in the upper 40s and 50s across most of the area, with 60s possible across far southern zones. The low pressure system that had been off of the Baja Peninsula the past few days has begun to open up and lift northeast, currently moving toward the Four Corners Region. Rain may briefly transition to freezing rain late tonight across northern Lea county where temperatures will drop to just below freezing. On Friday, the low will lift into the Central Plains, and moisture over the area will begin to decrease. Temperatures Friday will rebound back above normal as return flow develops, with highs around 60 degrees north to the lower 70s through the Rio Grande Valley.
The surface front has pushed all the way through Middle Tennessee and cooler air is filtering in. High pressure on the heels of the cold front will slide by to the north through the day and overnight hours. High pressure will slide east behind the cold front that came through this morning. As the high shifts east winds will veer from the north at the beginning of the period to the southeast at the end of the taf period.
233 PM MST Thu Dec 22 2016 Broad upper ridge covers the central CONUS, with a closed low over southern CA. Upper ridging will rebuild over the region Friday.
Shallow morning inversion not expected to mix out completely but stronger winds expected on the ridge tops. Weak ridge in mainly zonal flow aloft will bring dry weather with clear to partly cloudy skies. Upper trough digs south on Friday as it moves inland from the Pacific.
1101 AM CST Thu Dec 22 2016 NRLY flow will be seen this afternoon in wake of the cold front that pushed through overnight. Today Through Friday Night An upper low pressure system is off the coast of southern California. As the upper low moves into the southwest U. The low opens into a trough overnight and moves through New Mexico, then through Texas on Friday. Cloud cover is decreasing across south Arkansas this morning as a cold front works through the state.
1133 AM EST Thu Dec 22 2016 Low pressure will track across the area on Today. High pres is expected to ridge across the area on Friday. Low pressure will approach from the west today. The low center will intensify late today and tonight as it moves eastward through the Gulf of Maine, however the intensification will be too slow to produce significant amounts of snow across the State so only light accumulations are expected. High pressure will build to the southwest late tonight. Ridge axis wl be acrs the area for Friday with sfc bndry to the north. S/wv ridging builds acrs state thru early Sat mrng bfr beginning to break down as upr lvl trof appchs.
A cold front located northwest of the area will move in overnight.
1224 PM EST Thu Dec 22 2016 Warmer temperatures can be expected for the holiday weekend. In addition to cloud expanse, the trend to northwesterly flow in the lower levels is bringing in some amount of lake moisture influx to the northern CWA. This will end the chance of any/all flurry activity and also start to clear out the low clouds from the SW. Warm advection under that ridge will drive Friday temperature a few degrees above the seasonal averages.
351 PM CST Thu Dec 22 2016 Center of upper level low to our west over Arizona, as seen on current WV/IR imagery, is beginning to transition into an open wave as it becomes more elongated. As the upper level low becomes more elongated, the NAM/GFS/ECMWF all favor our northwest counties to see some precip initially during the overnight hours as the first upper level impulse splits and tracks across northern NM and northern TX Panhandle. Low level moisture and clouds will stay in place further helping to keep temps above freezing for most locations, though our Parmer County locations may see pockets of colder air that may lead to brief periods of freezing rain/sleet mixing in with any precip overnight and early Friday morning.
251 PM CST Thu Dec 22 2016 High pressure just to the west this afternoon has kept the westerly winds over the region and mostly sunny skies in the region tonight. Overnight, the winds will start to shift to more southwesterly and lighten as the ridge axis moves through ahead of the next storm. With the significant warming across the region today, short term guidance has come in a few degrees warmer with the overnight lows. Ceilings slowly coming down tomorrow between 12Z and 18Z as the surface trof approaches.
339 PM EST Thu Dec 22 2016 A dry cold front will track southward across the forecast area tonight. High pressure will then build in on Friday before quickly moving offshore Friday night.
443 PM EST Thu Dec 22 2016 A weak and dry cold front will move through the forecast area this evening. High pressure behind the front will build north of the forecast area tonight.
1259 PM EST Thu Dec 22 2016 A low pressure system will result in unsettled weather this Christmas weekend. Latest surface map suggests the cold front has pushed east of the area. Previous forecast indicated that there was a small possibility of some light snow across the higher terrain this evening. High pressure will build in tonight bringing any snow chances to an end. The high will then generally be in control through Friday. Model soundings indicate the low-level airmass will be quite dry on Friday. Latest temperature guidance for tonight was generally cooler than previous forecast numbers. Generally used a blend of MET/MAV numbers while leaning toward the cooler guidance for highs on Friday. High pressure fills in behind a weak front Friday with slightly cooler temperatures.
A high pressure ridge through the low and mid levels will be building across the area tonight. With the low/mid level ridge to our east tomorrow, we will have a S-SW flow regime that will be increasing in strength through the day as the northern Plains low moves east. Broken midlevel cloud cover should temper high temps back compared to today, but went with the warmer NAM MOS for highs, mainly in the mid 50s.
1231 PM EST Thu Dec 22 2016 [Through 18z Friday] A weak cold front will move into the area over the next 24 hours and dissipate. Moisture return ahead of it is weak, and this is expected to be a dry cold front with ceilings remaining mainly at VFR through the period. Weak high pressure across the CWA early this morning will continue to weaken as a low moves across the northeast and pushes a weak, dry front into the southeast. Highs will range from the mid 60s to the lower 70s, with the lower 70s across the Big Bend where clouds are likely to scatter out this afternoon.
340 PM CST Thu Dec 22 2016 Cold front pushing south of TN and is now moving through the deep south.
355 PM CST Thu Dec 22 2016 The weak cold front that moved through earlier today is now well south of the area. temperatures were similar to or only slightly cooler than those of yesterday. starting with a warm front lifting across the region on Friday.
strong high pressure is dominating the Great Plains into the northern Rockies. Temps are expected to reach the mid 30s to mid 40s today, which is a little bit warmer than yesterday.
1201 PM CST Thu Dec 22 2016 Surface ridging will slide eastward today, prompting a return to a southwesterly low level flow. Snow accumulation overnight will be light, generally a couple of tenths, perhaps up to half an inch through the lower Big Sioux and MO river corridors. Temperatures on Friday also likely to get up to or a little above freezing so roads will remain on the warmer side.
1256 PM EST Thu Dec 22 2016 Current satellite imagery show drier air beginning to work across the state as high pressure builds over lower MI. Temperatures finally climbed above the freezing mark at DTW (34 degrees), snapping an 8 day stretch below.
1224 PM EST Thu Dec 22 2016 A weak and dry cold front will move through the forecast area late this afternoon and evening. High pressure behind the front will build north of the forecast area tonight.
112 PM EST Thu Dec 22 2016 A weak and dry cold front will move through the forecast area this evening. High pressure behind the front will build north of the forecast area tonight.
1101 AM MST Thu Dec 22 2016 Late morning water vapor loop showed increasing mid level moisture spreading northeast across the Four Corners into CO and southern WY ahead of southern CA upper low. 5 inch I-80 corridor, to as much as 2 inches over the higher mountain peaks. A strong low pressure system was located over southern CA this morning. Mountains will likely see several inches of accumulation, but this is likely to be a sub-advisory event in the high country. Latest models remain consistent in tracking an area of low pressure thru the intermountain west and into the Dakotas over Christmas weekend.
104 PM EST Thu Dec 22 2016 A mid-level trough will move through the Great Lakes this morning. An area of high pressure will move across the region tonight into Friday. Highs will range from the mid 30s northwest to the lower 40s southeast.
A cold front will move east of the area this evening. High pressure builds into the region Friday.
A weak cold front is just barely reaching the the CWA and will push closer through tonight. The fog should dissipate after sunrise this morning, with the approach and passage of a cold front producing scattered patches of rain and backing winds. Otherwise, a weak cold front currently analyzed across central Texas will slowly pass through Deep South Texas and the Rio Grande Valley today, producing scattered patches of light rain.
What we have lower confidence on is exact precipitation type and where the highest amounts will be located. As mentioned we will continue to include some mention of a mix, but with surface temperatures near or just slightly above freezing the impact of any sleet or light rain will likely be limited.
Signs point to another round of dense fog for the lower valley as a weak front essentially stalls over the area, and the location of the boundary will impact fog development. The HRRR shows persistent dew points in the mid to upper 60s and very light winds for the lower valley tonight, supporting heavier fog formation. Southeast winds should reestablish themselves during the day Friday as high pressure shifts east and pressures fall across the high plains ahead of a short wave trough.
The surface front has pushed all the way through Middle Tennessee and cooler air is filtering in. High pressure on the heels of the cold front will slide by to the north through the day and overnight hours. VFR conditions will prevail through the next 24 hours as dry high pressure moves into the area.
A deep layered anticyclone will slide in from the west and build across the GOMEX and southern Florida, allowing prolonged unseasonably warm temperatures to continue with temps continuing to run 5-10 degrees above normal. This set the low temperature record for December 22 in the city.
Cloud cover will increase through the morning from the west and south, then decrease into the evening as high pressure begins to build in. As high pressure and cold Arctic air move in through the day, cold air advection and cloud cover will prevent temps from rising much, especially in the southern valley where cloud cover will persist. Even as windy conditions diminish and high pressure moves in overnight, radiational cooling will likely continue to aid falling temps.
With llvl gradient and winds aloft on Thursday expected to be similar to this past aftn, went ahead and upgraded the High Wind Watch to a Warning for the wind prone areas. Cooler over the Panhandle Friday with less wind otherwise east of the mtns.
Initially, most of the atmospheric energy will be used to cool the lower atmosphere as a 2000 to 3000ft warm layer will be in place across much of the region. In light of much colder air and NW flow, snow showers will develop and additional snow accumulation is likely, especially over the ridges and I-80 corridor.
We will then transition into a more active weather pattern tonight and Friday as a weak cold front moves through the region. Cooler air will move in behind the front and Friday afternoon temperatures will range from the mid 40s to mid 50s mountains to mid 50s to mid 60s across lower elevations.
A cold front that is approaching the region, will stall over Central Florida.
That being said, we are expecting quite a bit of recovery today, especially from late morning through the afternoon ahead of a cold front.
This will quickly end our persistent, brisk cyclonic flow around the broad Hudson Bay mean trough and replace it with a warm front into the MO Valley. This will push the warm front into MO and IL by midday with deep cool advection and temps continuing to cool day to day.
1228 AM EST Thu Mar 9 2017 High pressure will build behind a departing cold front tonight and prevail much of Friday, before another weak cold front crosses the region later Friday and Friday night.
251 AM CST Thu Mar 9 2017 High pressure that was centered over the lee side of the Canadian Rockies had worked into the forecast area as of 08Z. The high pressure will affect the region today through Friday. It's possible this will change and a better chance for snow returns, but it looks like an area of high pressure over central Saskatchewan Sat/Sun will be strong enough to keep chances for precipitation minimal across the Northland. In addition, temperatures have trended a bit cooler with highs in the teens to 20s over the weekend, which is around ten degrees below normal.
After the snow showers today, a high pressure ridge will move over the area from a strong high (around 1050mb) in central Saskatchewan. The subsidence associated with the ridge should help diminish any lingering low/mid clouds although it does look like there may be some high clouds streaming overhead.
Instability and shear will be modest with 600-1200 j/kg moving over the area during the afternoon as a cold front moves into the area. A ridge will build over the Rockies during this time frame and allow a cold airmass to dive across the Plains and into the Ozarks Friday night.
325 AM EST Thu Mar 9 2017 Low pressure will remain over Quebec through Friday as high pressure approaching from Western Canada pushes colder air across the region.
For Friday, a backdoor cold front will work its way in early Friday morning. Considerablly cooler temperatures are forecast with low 50s northeast to lower 60s southeast.
1214 AM EST Thu Mar 9 2017 Low pressure will remain over Quebec through Friday as high pressure approaching from Western Canada pushes colder air across the region.
340 AM EST Thu Mar 9 2017 High pressure today. Cold front crosses tonight. A high pressure system will provide plenty of sunshine again today. Will go closer to the cooler LAMP MOS. A cold front will push through the area tonight.
Temperatures will fall into the low 60s over much of the region tonight, with patchy fog possible again late.
/issued 827 PM EST Wed Mar 8 2017/ Zonal flow is in place aloft over the region as a rather weak cold front moves southeast across the northern part of the peninsula this evening. A weak cold front will dissipate over the region tonight with high pressure then building into the southeast through the end of the week.
At the surface a cold front will be just south of the region with high pressure over the Southeast. Lows in the low to mid 50s are expected elsewhere. High pressure will build in leading to dry conditions and above average high temperatures with readings in the upper 70s to lower 80s Thursday. A weak disturbance will team up with a southward moving cold front to bring a chance for showers Friday into Friday evening.
Scattered storms likely to develop near or just north of the OK/KS border and spread east and southeast w/ the highest chance of impacts being across far NW AR sites from mid afternoon to early evening. low level moisture with 50+ degree dewpoints and cloud cover were streaming northward within the low level flow. temperatures overnight tonight are forecast to remain warmer compared to last night.
1247 AM EST Thu Mar 9 2017 A ridge of high pressure will track across the region overnight into Thursday providing dry weather. An area of low pressure will develop across the central Plains on Thursday which will allow a stationary front to develop eastward across central Indiana. High temperatures today will range from the lower 40s across southern lower Michigan to the lower to mid 50s for areas south of Route 24. While core of 70-75 knot 8H jet streak has now carving through parent trof into Lower Great Lakes, still 50 to near 60 kt flow still occasionally tapped this afternoon with height of wind event in 19-21 UTC timeframe/coincident with peak sfc-8H lapse rates of 9.