Aikyam-Lab/Synoptic-Bench huggingface dataset:
630 PM EDT Sun May 14 2017 Weak low pressure and a cold front over Lake Erie will drop to the Ohio Valley today and become nearly stationary. High pressure from eastern Canada will build south across the area later today into Monday.
205 PM EDT Sun May 14 2017 High pressure will build over NC tonight.
Expect gusty north winds along portions of the lower Colorado River Valley today. Otherwise, high pressure will bring mostly sunny skies and warming conditions through the week. Winds are right on target this morning along the lower Colorado River, with gusts near 40mph at Bullhead City.
A wave of low pressure moving near the southern state border will bring a band of snow to areas southeast of Grand Rapids tonight.
1113 AM CST Tue Mar 6 2018 A complicated forecast this morning as a strong low pressure system continues to affect the local area. opted to expand in area and time the high wind warning across the local area. it was very difficult deciding where to cut off the high wind warning as several locations outside of the warning have seen gusts into the mid 50s this morning. think the majority of the strongest winds will now lie in the area with the high wind warning. These lighter winds and clearing skies should allow overnight temperatures tonight to drop into the lower 20s or even teens by late tonight.
An upper level closed low will move southeast today from Iowa into Missouri/Illinois. A vort max wrapping around behind this low will sweep through Southwest Kansas through morning and midday. Therefore, moved the High Wind Warning up to start at 7am to cover our northern counties. This will cause surface wind to flow from the northwest at 35-45 mph, with gusts to 60 mph, with the highest winds late this morning and early afternoon. Fire weather will continue to be a major concern thanks to the wind, and to relative humidity dropping this afternoon despite a cooler airmass. This evening, the aforementioned upper low will move west. This will allow the surface pressure gradient to decrease and for high pressure to move in.
1028 AM MST Tue Mar 6 2018 Water vapor loop showed the powerhouse upper low centered over northwest IA, with strong northwest flow aloft dominating the CWA. Temperatures ranged from the lower teens to mid 20s, with wind chills from 0 to -10.
General timing of the forecast increases rain chances from N-S overnight with ends the same after passage of the cold front by Wed Afternoon from N-S. High pressure will steadily build across the Gulf of Mexico behind the front, with the center reaching the Florida peninsula Fri night. Lows will be mainly in the lower-mid 40s, except some upper 30s are possible in the north on Fri. High pressure will shift offshore Sat and provide a southerly wind flow which will allow high temps to get back into the mid 70s. The southerly flow is forecast to increase Sat night as low pressure moves eastward towards the lower Ohio Valley.
An area of weak high pressure off the east coast of Florida this morning, will shift east this afternoon. Winds will turn from the west to north Wednesday afternoon with the passage of a cold front over the Florida Keys.
216 PM MST Tue Mar 6 2018 Flow aloft over Northeast Montana is northwest due to a split trough arrangement, with a closed low over northern Alberta and Saskatchewan, and the large stacked low centered over the Great Lakes tonight. There will be an upper ridge located along the West Coast.
Low pressure at the surface and aloft is over the mid Mississippi Valley, and is well depicted on satellite imagery. As the low moves east tonight, scattered to numerous showers will develop across our area. The forecast challenge is the change over to mixed snow and rain tonight, or in the case of the higher terrain the change over to all snow. At this time accumulating snow should be confined to the highest terrain of far southeast Kentucky. Despite the cold air advection tonight, most areas are forecast to stay above freezing, with the exception being the highest terrain of the far southeast.
249 PM CST Tue Mar 6 2018 Water vapor imagery showing the center of the closed upper low continuing to push slowly southeast through Iowa. Things quiet down tonight with main upper level moving well to our east and ridging beginning to move in from the west. The ridge noted above is progged to build into the western half of the CONUS while troughing sets up in the east. Long range models have been showing a clipper system moving over the ridge and through the central Plains by the weekend, but the timing and intensity have not been very consistent with past few model runs.
As of 3 AM CST, temperatures across the Mid-South are in the lower to middle 50s across Northeast Mississippi and 40s elsewhere. A tight pressure gradient associated with this surface/upper level low is expected to produce gusty northwest winds reaching advisory criteria across portions of Northeast Arkansas, the Missouri Bootheel, and Northwest Tennessee this afternoon. Increasing clouds are expected by tonight with this surface/upper level low. Highs today will be mainly in the lower to middle 60s with lows tonight in the 30s.
A cold front has pushed off the mid and upper-Texas coast and south of Corpus Christi this morning. No freezing temperatures are expected currently but will need to monitor trends if dewpoints fall further. Would not be surprised if a few low-lying spots reached near freezing briefly. More high passing clouds are expected Wednesday afternoon with temperatures only reaching into the low to mid 60s due to the cooler start.
High pressure will provide warmer and tranquil conditions for much of the week. Water Vapor Satellite shows a ridge building from the West Coast into the interrior West. A 1037mb anticyclone is centered over northwest Colorado, creating a 10mb northeasterly pressure gradient over Utah. Last of trapped stratus has eroded across far northeast Utah and southwest Wyoming, leaving the area under sunny skies save for a few cirrus that can break through the ridge axis to our west. Skies have cleared across much of Utah this morning, as high pressure begins to build over the Great Basin. The low level airmass will generally warm and dry through today, though this process will be somewhat slow, so afternoon max temperatures will be below seasonal normals for one more day.
308 PM EST Tue Mar 6 2018 Low pressure crossing Ohio tonight will bring rain changing to snow.
VFR conditions along with north to northeast winds are expected through the period as a cold front moves away from the region. Across se Tx and srn La skies have cleared rapidly behind the front and temps have dropped from the 70s yesterday to the low 60s today with clr skies. As of 4 AM, surface observations indicate that the surface cold front extends through far southeastern Acadiana out into the northwestern Gulf of Mexico. High pressure will then begin to build into the region allowing for skies to clear throughout the day.
306 PM CST Tue Mar 6 2018 A deep occluded low pressure system will advance eastward across northern Illinois this evening. Gusty southwest winds of 20-30 mph will linger into early evening, mainly south of I-72 a little further south of the low pressure track. Winds will weaken near the low track, and become west- northwesterly in the wake of the low. The center of the cold pool is expected to rotate through Illinois with the upper trough axis Wed night, dropping between -12C to -14C range.
Look for a decent temperature drop overnight with caa continuing as high pressure makes its way further south into the region. Mostly sunny, dry but cooler conditions should prevail Wednesday with ridging in control.
Rain showers and isolated thunderstorms will spread across the region early this morning ahead of an approaching cold front. Early morning surface analysis shows a cold front pushing across southeast Louisiana, interior southeast Mississippi and into western and northwestern portions of Alabama. Much cooler tonight with lows in the mid 30s to around 40 inland, and slightly warmer near the beaches.
Expect gusty north winds along portions of the lower Colorado River Valley through the afternoon, decreasing tonight. Otherwise, high pressure will bring mostly sunny skies and warming conditions through the week. The next several days will feature an upper air pattern that is somewhere between a ridge and zonal flow. Confidence increasing for a low-amplitude s/wv to move through the ridge this weekend. We have raised chanced a bit, especially for the higher terrain and southern portions of the CWA. Snow levels will be fairly high with this airmass and most snowfall will be limited to the higher parts of the southern Sierras and Spring Mtns.
Strong upper low centered over Iowa and dropping south southeast at this hour, with a notable lobe of energy wrapping southward into southern Nebraska at this hour. Fire concerns remain, although with higher RH values and cooler temperatures today, will hold fast with the wind advisory and messaging of very high fire danger.
1237 PM EST Tue Mar 6 2018 An occluded front will lift north into the area today as weakening low pressure approaches from the west.
VFR Conditions will prevail through the terminal forecast period as High Pressure settles across the region. The I-30 corridor is seeing a little more gustiness as fresh high pressure is making a move into the area.
The high will also cause winds to die down, although they are still breezy over sites near the North Dakota border. High pressure will bring lighter winds into the forecast area today.
221 PM EST Tue Mar 6 2018 Low pressure passes tonight.
TRI is expected to hold onto the low-level moisture and low cigs through about 20z this afternoon with improving conditions thereafter in the wake of the front.
344 PM CST Tue Mar 6 2018 Impressive gradient winds between high pressure over Texas and a deep low over the Midwest have been observed across the Midsouth today. Temperatures are in the low to middle 60s. A dry cold front will move quickly across the Midsouth tonight. low humidity and relatively light wind will allow temperatures to fall into the low to middle 30s.
411 PM EST Tue Mar 6 2018 A cold front will move through the forecast area tonight.
1259 PM EST Tue Mar 6 2018 Scattered rain showers will become numerous this afternoon and evening as a low pressure system moves over the area.
With surface temperatures above freezing will see precip to fall as a rain/snow mix. Upper low rotates through the area Thu-Fri combining with seasonably cold westerly flow to prolong snow showers downwind of the lakes and over the favored upslope areas along the Allegheny Plateau. This will support additional snow accumulation through the end of the week across the higher elevations in the Laurel Highlands and northwest Alleghenies.
The highest winds will be across the northern terminals with lighter winds but still gusty, at the remainder of the terminals. Moisture wrapping around low pressure will bring some clouds to mainly the north butoverall, VFR conditions will prevail. Winds will subside tonight as a cold front moves in from the north. A reinforcing shot of cool and dry air will arrive late this evening and overnight as high pressure moving south from Canada into the northern Rockies drives another cold front into the state. Winds will remain elevated somewhat though so widespread freezing temperatures are not forecast. Expect to see a roughly 10-12 degree drop in highs tomorrow versus today thanks to the incoming cold front this evening though, and with winds falling nearly calm tomorrow night widespread freezing temperatures do seem likely.
331 PM CST Tue Mar 6 2018 Cold front stretches from central IL southwest through eastern OK. Meanwhile, a strong upper level trough axis will amplify and push across the mid state after midnight. After lows tonight in the lower to mid 30s, the mercury will hold in the 40s for Wed and Thu. Freezing temps are on tap for Wed nt and again on Thu night. Upper low will slide southeast over the forecast period leading to an increase in cloud cover and winds.
Weak high pressure aloft and breezy offshore winds will support well above normal temperatures today. Increasingly moist southwesterly flow will bring increasing clouds, cooler temperatures and rainfall chances later this week, first focused north of Point Conception, then everywhere by this weekend.
153 PM CST Tue Mar 6 2018 Intense wnw winds are occurring over the area today as low pressure along the se IA/ne MO border moves southeast into IL.
With that said, it is entirely possible the models are overestimating the low level moisture, and hence cloud potential. Challenging forecast with the low level stratus.
319 PM CST Tue Mar 6 2018 An upper level low pressure trough was moving southeast into Illinois this afternoon. Tonight high pressure builds southward into the Plains and into Oklahoma on Wednesday. Lows tonight will dip down into the low to mid 20s. Highs on Wednesday are expected to warm into the lower to upper 40s.
MVFR conditions will gradually end overnight as a cold front sweeps through and skies clear. The 06z surface analysis showed a cold front stretching from Louisiana northward into Indiana.
Impressive cyclone in central Iowa at midday, with intense jet core mixing down to the surface in the subsident rear quadrant of the cyclone over SW KS.
1105 AM MST Tue Mar 6 2018 Latest satellite loops showed upper low complex over south central Iowa spinning away from the CWA with resultant decreasing gradient. Upper level analysis shows closed low over northwestern IA/southwestern MN. A broad trough stretches over the northern plains, and a ridge is building over the west coast. Upper low will swing southeast over IL today, as the upper ridge to the west shifts eastward. As the upper ridge works its way into the central states, quiet weather and a warming trend are expected through the end of the week.
309 PM CST Tue Mar 6 2018 Water vapor imagery depicts the exiting upper level low to our southeast.
157 PM MST Tue Mar 6 2018 20z surface analysis had low over northern IL with stacked upper low spinning through IA into IL per water vapour loop.
257 PM EST Tue Mar 6 2018 Low pressure passes tonight.
Across se Tx and srn La skies have cleared rapidly behind the front and temps have dropped from the 70s yesterday to the low 60s today with clr skies. As of 4 AM, surface observations indicate that the surface cold front extends through far southeastern Acadiana out into the northwestern Gulf of Mexico. High pressure will then begin to build into the region allowing for skies to clear throughout the day.
255 PM CST Tue Mar 6 2018 Massive upper level low dropping south with snow and blowing snow coming to an end. Will maintain the low chances across the area as accumulations are not very likely. Mostly clear skies will develop on Wednesday night as cold high pressure settle south.
As this system rolls east and morphs into long wave troffiness acrs the GRT Lks and into the east coast, northwesterly flow aloft and resultant cool regime to extend acrs the region into the late week. As mentioned above, the closed off upper low will look to gyrate southeastward acrs the southern CWA through the afternoon, and exit acrs southern IL by this evening. Again, there could be some localized higher amounts in bands, even south of I80 if the cooler profiles win out even during the afternoon. The vertically stacked upper low will exit the region tonight. On Wednesday, cyclonic flow aloft around the Great Lakes upper low should support some afternoon flurries.
A progressive upper-air pattern will continue across the country tonight through Wednesday with ridging across the west coast followed by broad cyclonic flow to the east. At the surface, low pressure will shift into the northeast tonight through Wednesday, with an associated cold front pushing through the Florida peninsula. The front will clear the forecast area by early Wednesday afternoon, with a cooler and drier air mass starting to spill into the region on breezy northwest winds.
1104 AM CST Tue Mar 6 2018 Much quieter TAFs on its way for the 18Z package as the cold front (and its associated precipitation) continues to move off the coast. A reinforcing cold front (and a surge of colder air) is still fore- cast to sweep down this evening/tonight but no precipitation is ex- pected with its passage.
238 PM CST Tue Mar 6 2018 (Tonight and tomorrow) A reinforcing cold front will continue to exit the southern counties through the evening. Decided to factor in the possibility for overnight cirrus and kept temperatures slightly warmer. Temperatures will be at or slightly above freezing across the area tonight. Wednesday continues to look cool with lows near freezing to start, and highs from the upper 50s to mid 60s.
With surface temperatures above freezing will see precip to fall as a rain/snow mix. Models are in fair agreement as the upper level low rotates through with the Upper lows having a Fujiwara interaction as they move through the northeast.
A cold front will then move into the region, with showers and a few thunderstorms possible at area terminals after around 03Z or so.
Weak high pressure aloft will bring dry weather and warmer temperatures through Wednesday.
1011 AM MST Tue Mar 6 2018 Upper level analysis shows closed low over northwestern IA/southwestern MN. A broad trough stretches over the northern plains, and a ridge is building over the west coast. Upper low will swing southeast over IL today, as the upper ridge to the west shifts eastward. As the upper ridge works its way into the central states, quiet weather and a warming trend are expected through the end of the week.
Winds, as indicated by the higher-resolution models, are already running close to 40 kt a couple thousand feet AGL along the Kansas border.
226 PM CST Tue Mar 6 2018 Periodic light snow has continued today as the stacked low pressure system works eastward towards the Great Lakes. Remaining snow will be on the decline through this evening and tonight with drier subsident flow behind the upper trough. Another upper level trough will swing southeastward on Wednesday.
Winds will shift out of the northeast this afternoon as a weak cold front moves across the region. Highs will range from the mid 60s in the Big Country to the lower 70s along the I-10 corridor. Good radiational cooling conditions will allow temperatures to fall into the lower to mid 30s across the entire area Tuesday night/Wednesday morning.
The low is expected to continue pivoting through the region, Tuesday. Precipitation chances and wind speeds will diminish from west to east through the afternoon hours, as the low ejects out of the region. Slightly cooler temperatures in the upper 20s to low 30s can be expected Wednesday across the northern/snow covered portion of the CWA. Much quieter weather is in-store for the remainder of the week as a ridge builds into the western half of the country, leaving us in northwesterly flow aloft.
Skies mainly clear tonight RRV and east, though some cirrus perhaps, and this will allow temps to drop into the lower single digits with the fresh snowcover. Clouds moving east into the DVL basin will keep temps warmer there.
Current forecast looks good with some mid level clouds filtering in late this afternoon starting in the northwest as the low slides ESE. Another wave of clouds will pass through the area late tonight as the upper trough swings through this portion of the country.
A surge of high pressure will move through tonight after 03Z, but mainly only increase winds toward the coast, mainly at CRP.
Current forecast looks good with some mid level clouds filtering in late this afternoon starting in the northwest as the low slides ESE. Upper low will slide southeast over the forecast period leading to an increase in cloud cover and winds.
First system, the offshore closed low, has strong dynamics but the strong coastal ridge will deflect it Nwd and into the Pac NW on Thu. The first system displaces the coastal ridge inland, allowing a more active Srn stream to spread precip mainly across the Srn half of CA on Sat into Sun. The Model Trend Tool (GFS based) shows the trof deepening over the past several runs which would keep the trof's effects over Norcal longer, and resulting in a potentially wet and cold pattern. The offshore closed low remains quasi-stationary centered to the west of 140W and will remain so today before starting to lift out toward the PacNW tonight.
SHORT TERM (Tonight through Wednesday Night): A weak cold front pushed through the CWA today and will continue slowly south. Light precip will linger through this evening, but will taper off quickly tonight as dry air filters into the region and upstream ridging builds east, producing an increasingly stable northwest midlevel flow. Temperatures will be near normal by night, with overnight lows in the 50s, with slightly cooler than normal high temperatures on Wednesday, mostly in the lower 70s.
VFR conditions will prevail next 24 hours as a weak cold front eases into the area. Dry air and light winds across the region will also contribute to many areas in Southeast New Mexico, Upper Trans Pecos and Permian Basin seeing near or below freezing temperatures by sunrise. Another cold front will sink south through the region today, reinforcing the cooler the cooler air and high temperatures will remain in the 60s most locations. The exception will be in the Lower Trans Pecos and south through the Big Bend region where a bit of low level moisture may keep lows in the upper 30s to low 40s.
Cooler and much drier air will move in behind the front.
A weak upper level ridge will continue to build into the Pacific Northwest today. This ridge will continue over the region tonight.
Issued by National Weather Service TUCSON AZ 127 PM MST Tue Mar 6 2018 Varying amounts of high clouds are expected across the region this week as weak high pressure builds across the area. Dirty ridging will remain the dominant theme the next few days with varying amounts of cloud cover forecast each afternoon along with above normal temperatures. Consequently this should also result in warmer temps with lower 80s common across most of the metro.
1258 PM EST Tue Mar 6 2018 Scattered rainshowers will become numerous this afternoon and evening as a low pressure system moves over the area.
1004 AM MST Tue Mar 6 2018 Isolated light snow showers will continue over the highest peaks of the CO northern mountains early this morning then dissipate. A strong ridge will build over the western U.
/Issued 439 AM CST Tue Mar 6 2018/ For today, a vigorous upper level low pressure system over the midwest states will continue moving east and southeast and further away from the fcst area.
1006 AM MST Tue Mar 6 2018 Today/Tonight: Winds have rapidly strengthened this morning in association with insolation/mixing amidst 45-55 knot low/mid-level NW/NNW flow on the western periphery of a mature /vertically stacked/ mid-latitude cyclone centered invof south-central Iowa at 16Z. Expect winds to decrease considerably AOA sunset as insolation/mixing rapidly wane and flow aloft weakens as the aforementioned cyclone fills /weakens/ and progresses southeast to IL/IN. Expect continued dry conditions along with a warming trend on Wed as the decaying cyclone progresses further downstream, an upper level ridge builds over the Intermountain West, and H7/H5 heights rise over the High Plains. Given a weak MSLP gradient and no more than 10-20 knot flow in the lowest 4-6 KFT agl, anticipate light W/NW winds at 10-20 mph across the Tri-State area.
1128 AM CST Tue Mar 6 2018 Low pressure will continue to spin just east of the region through Tuesday. In addition to snow potential, the low will bring some extremely high winds to the region. Upper level ridging will expand east across the area mid to late week.