Aikyam-Lab/Synoptic-Bench huggingface dataset:
619 AM CDT Sat Apr 22 2017 A nice weekend day for outdoor activities today, with early morning cirrus shield over the southeast forecast area shifting further southeast, and upstream cirrus dissipating as it attempts to spill over the upper ridge. This yields high temperatures generally in the mid 60s, with afternoon dew points in the lower-mid 30s. Skies remain mostly clear tonight, with lingering ridge axis across northwest Iowa allowing for a fairly quick temperature drop in the evening. Readings should steady out a little more overnight, though, as the low level ridge shifts farther southeast and stronger low level southwesterly flow begins to develop. Generally looking for lows in the lower 40s, with some upper 30s in parts of northwest Iowa/extreme northeast Nebraska.
922 AM EDT Sat Apr 22 2017 Low pressure will track along a stalled front over Tennessee today and tonight. High pressure centered over the northern plains and central Canada will slide east across the Great Lakes early in the week.
Overall forecast is on track through tonight, with only slight adjustments for the latest trends and maybe a degree or two cooler. Much of northern Colorado remains under a broad upper trof early this morning with latest impulse now moving into northwest Colorado. The back of the trof will slide east of the area this afternoon with increasing subsident flow with building high pressure over Colorado tonight.
1214 PM EDT Sat Apr 22 2017 Low pressure will track along a stalled front over Tennessee today and tonight. High pressure centered over the northern plains and central Canada will slide east across the Great Lakes early in the week.
We still expect storms with the potential for severe wind gusts/hail to develop ahead of a cold front over Central MS. Latest analyses indicate the cold front is approaching northwest portions of the ArkLaMiss with winds having shifted at El Dorado and Pine Bluff, AR. /EC/ 12Z TAF discussion: Additional storms will redevelop this afternoon and move eastward through early evening as a cold front pushes across the area.
With the rain ending, expect a coolish weekend with gradual clearing from west to east this afternoon, with clear skies tonight through Sun, as a weak upper level ridge moves across the area with north- northeast surface flow. Ketcham There are no concerns as high pressure spreads S/SW acrs the Cntrl Plns as the sfc cyclone conts to move E acrs the Lwr-MS Valley.
Highs today will be quite cool with NE flow continuing, gusty winds at times with low pressure passing to our south. Will leave a small chance of showers in for mainly the KY Pennyrile Sunday just west of the upper low, then dry things out by Sunday night.
/Issued 348 AM CDT Sat Apr 22 2017/ Upper low is now over southwest Missouri with low clouds and areas of drizzle or fog over eastern Oklahoma and western Arkansas. Latest surface analysis showed low over southwest AR with cold front extending south of the DFW area into far west TX.
642 AM CDT Sat Apr 22 2017 Minimal changes for the today period with a slow advancing cold front pushing into the northern tier of the ND counties as winds have shifted with a northerly component over the past couple hours. A rather cool and raw April day with temps in the low 40s as 925mb range -2 to 4C with a east northeast wind.
High pressure will build over the area today bringing a warming trend.
740 AM EDT Sat Apr 22 2017 Low pressure tracking across the Tennessee Valley and Southeast United States will result in rain chances south of I 80 today, and south of I 70 Sunday. Areas of light rain have developed along a mid level trough ahead of the main approaching nrn stream upper trough.
531 AM MDT Sat Apr 22 2017 Upper level analysis has a rex block across the central CONUS with ridging across the Great Basin area. At the surface, weak high pressure is located across the Dakotas. An upper ridge will bring mild weather for the weekend. Upper flow will become southwesterly by Sunday night ahead of the approaching trough, and southwesterly winds will become breezy across south central SD on Sunday.
844 AM MDT Sat Apr 22 2017 Skies have cleared across most of the forecast area, although high cirrus are streaming over the upstream ridge. A weak upper level ridge of high pressure will build over the region today.
1033 AM MDT Sat Apr 22 2017 High pressure will begin to build over the forecast area today, initiating a warming trend and providing dry weather. The current satellite water vapor image is showing high pressure building over the Great Basin with a low pressure system positioned over Missouri.
A cold front will push through the area this afternoon and bring back some lower cigs for the evening through around midnight. Cold front Currently moving into Central Texas and the Hill country and will progress southward through the day. though more cloud cover will keep things cooler than yesterday.
Expect MVFR conditions to develop this morning as low level moisture increases ahead of a cold front moving through central Texas. MVFR conditions will develop this evening as moisture pools across the area as the cold front moves through the lower Rio Grande valley tonight.
/12Z TAFS/ Radar loop suggests the cold front to be on track for passage at AUS by 12z, DRT by 13z, and SAT/SSF between 1330 and 14Z. Gusts to 25 knots should be common for much of the day with it taking up to a two-hour delay between fropa and the higher gusts to arrive. Low clouds continue to develop across much of the area ahead of an approaching cold front.
Then the northern stream drops some high level clouds into the northern cwa mainly later this afternoon and tonight as a surface cold front drops into central MN by Sunday morning. Lows tonight wont drop off that much as the cold front and some high clouds move later in the evening/overnight. For Sunday, a cold front will settle over central MN into southern WI. Highs over northern tiers will remain in the lower-mid 50s with an easterly wind while central to southern portions will hit the mid 60s to near 70 with a continued southwest wind.
Even though the surface front will be east of I-65 by midnight tonight, the upstream upper low will remain positively tilted, keeping clouds and some showers across west Alabama after midnight. For the afternoon, there's a chance that some shower activity in the northern counties on the backside of the low pressure system, but will only include chance PoPs for the afternoon.
Low pressure is centered over Lake Sakakawea with a stationary boundary extending westward through our CWA. That frontal boundary strengthens somewhat tonight as it drifts south into the forecast area as a back door cold front and gains some overrunning moisture which will bring a chance of rain along the Canadian Border. Upper trough moves inland from the Pacific on Sunday which will bring deep moisture inland.
This as the warm front lifts back northward temporarily this morning. CAMs suggest rapid development of mult- cellular and possibly supercellular convection by 19-20Z along and west of I-65 along and ahead of the cold front. 8h temps will drop into the 4-8C range and temps will struggle to get back into the lower to middle 60s, especially if an overcast is able to stay in place.
715 AM EDT Sat Apr 22 2017 Low pressure will track along a stalled front over Tennessee today and tonight. High pressure centered over the northern plains and central Canada will slide east across the Great Lakes early in the week.
921 AM PDT Sat Apr 22 2017 Dry today then several Pacific storms move through bringing cooler temperatures and mainly light precipitation. High clouds spreading into the region will help to cool temperatures today into the low to mid 70s for the valley.
Better coverage will probably develop in northeast Colorado in the low level upslope regime north of the front, aided perhaps by a weak impulse in the northwest flow aloft. Upper ridge axis will be over the central Plains on Thursday.
1132 AM MDT Wed May 31 2017 Upper ridging is strengthening across the central to northern Rockies and building into the northern plains this morning with northwest flow over the CWA. Both upper level and thermal ridge will cross the CWA Thursday bringing temps well into the 80s across the CWA.
1055 AM PDT Wed May 31 2017 A weak system will move through the interior today to bring light amounts of rain and cooler temperatures. Dry and warmer for the remainder of the week.
Upper level cloudiness and the low level dry air will likely lead to a later start to convection, and lower instability should lead to more garden variety convection, with isolated strong storms.
An upper level ridge is forecast to build across the Northern Plains on Thursday by the 12 UTC global suites. Given dry soils, trended towards the warmer edge of the guidance envelope. However, the very top end of the envelope was not used as southeast winds ahead of low pressure across eastern Montana is not as supportive of reaching the highest threshold of guidance as west/southwest winds.
232 PM PDT Wed May 31 2017 Cooler temperatures and a few showers remain through tonight.
A broad upper level trough persisted over the eastern half of the CONUS this morning while a near Rex Block pattern was in place from the northern Rockies into the Desert Southwest. Farther west, an upper level trough was moving onshore into the West Coast.
High pressure over the region will shift east of Utah through tonight.
1219 PM CDT Wed May 31 2017 Isolated showers and thunderstorms over central Illinois early this morning are occurring along a weak cold front that extends from central Illinois into northern Missouri. A better chance for development will occur late this evening and overnight when the low level moisture convergence increase over the Plains which will increase the chance that a MCS will develop over eastern KS/western MO that will eventually move across central Missouri late tonight.
315 PM EDT Wed May 31 2017 A cold front approaches from the west tonight and crosses the region Thursday.
An upper trough will bring a slight chance of showers to interior Northwest California today and near normal temperatures to the region. An upper trough will continue to bring mid and high level clouds to the region today. A few light showers impacted Trinity and Mendocino counties overnight and some additional showers could develop this afternoon as the trough gradually moves east. Near normal temperatures are expected today and on Thursday with the trough overhead. The trough has disturbed the marine layer resulting in less stratus than recent days. As the trough moves east on Thursday the marine layer inversion will begin to re-establish itself.
This will allow for a few having sufficient enough rotation for updrafts to develop hail given freezing levels near or below 10k feet. Will continue to see the parent upper low slide east from Ontario into Quebec this evening, subsequently sending the above mentioned front south toward the Tennessee Valley. Some fog development will be likely overnight as surface ridging builds in, especially in spots that have recently received rainfall. While increasing moisture will ooze back in from the southwest Thursday night, another ridge/valley temperature split and night of valley fog should materialize with high pressure sliding across eastern Kentucky.
141 PM EDT Wed May 31 2017 A zonal flow aloft will be over the region for the rest of the week, with some weak troughing associated with a stalled front. The guidance consensus supports pops 10 to 20 percent with the higher values in the southeast section closer to deeper moisture.
/issued 407 AM EDT Wed May 31 2017/ This morning, an elongated ridge of upper level high pressure was observed on water vapor imagery, centered near Bermuda. 45 inches of PW and SB CAPE above 2000 J/KG, along with small capping temperature inversions in the lower levels. This afternoon, as the aforementioned ridge of high pressure weakens slightly and moves slowly eastward, the flow will veer more southeast. Subsidence from high pressure aloft, along with light winds, will allow maximum temperatures to reach into the lower 90s along the coasts and mid 90s inland. As high pressure begins to weaken on Thursday, guidance decreases maximum highs by a few degrees.
320 PM CDT Wed May 31 2017 Other than a few puffy cumulus clouds this afternoon, skies have been sunny, thanks to high pressure situated over the cwa. Afternoon temperatures were in the lower to mid 70s along with northwest to west winds, occasionally gusting to around 30 mph. Tonight: High pressure will bring another pleasant night with clear skies, light to calm winds and somewhat cooler than normal temperatures. Thursday: We begin the month of June (and meteorological summer) with high pressure still in control. During the afternoon, the ridge slowly shifts off to the east. This will begin to increase the moisture in our far sw cwa on the return flow around the departing ridge. Temperatures should be several degrees warmer compared to today, with highs well into the 70s to near 80.
Gusty winds up to about 45 mph will continue to be the main threat, especially as the storms move into the lower elevations late this afternoon and evening. More stable air moving in from the west, in response to a weak trough passing through the state, should lead to generally decreasing storm coverage by late Thursday afternoon or early evening.
1204 PM CDT Wed May 31 2017 Upper trough which has had a strong grip on out weather the last few days will continue to relax eastward today as Rockies ridge nudges toward the Northern Plains. Mixing just ahead of the ridge axis could allow some 10 to 15 mph winds around SW MN and the IA Great Lakes through midday, but likely as strong as would see.
Ridge breaks down down today with unstable sw flow expected ahead of a cold front. Anglin An upper level ridge of high pressure will reside over the region for one more day.
Isolated mountain convection occuring with some cloud flashes but activity is anchored on the higher terrain. Do not expect much progress into the lower elevations from these storms this evening. Anvil debris tonight will combine with a warmer start to make tonight milder than previous nights. Still will see winds increase late at night bringing cooler temperatures with cyclonic flow aloft permitting a few showers.
High pressure over region through tonight, before front begins to drift back on Thursday as warm front, with a return of moisture and new chance of pcpn. Temperatures should be a bit cooler today, but still in the mid 70s, as drier air settles over the area. The broad circulation around the Ontario upper low will be slowly shifting eastward Thursday, allowing the ridge over the Rockies to move into the Plains.
Seasonably cool, breezy conditions will persist through midweek with a slight chance of showers early this morning as an upper level trough moves inland. Inland temperatures will be about the same or possibly a few degrees cooler than yesterday with highs in the 70s.
626 PM EDT Wed May 31 2017 A zonal flow aloft will be over the region for the rest of the week, with some weak troughing associated with a stalled front.
438 PM CDT Wed May 31 2017 A ridge of high pressure at the surface will help keep the weather mostly quiet for the next 24 hours. Cyclonic flow around that persistent upper low we had for the past several days is continuing to push colder air into the region though, and this has kept temperatures on the somewhat cool side today. If it were just a bit cooler and winds a bit lighter I would be contemplating a frost advisory, and I have not gone as cold as the coldest guidance available to me. Tomorrow the upper level ridge axis shifts to over northern Minnesota, and expect warmer temperatures for Thursday than we have had today as the winds turn more westerly.
227 PM PDT Wed May 31 2017 A weak low pressure system moving through California will bring cool weather and extensive coastal clouds through Thursday.
320 PM CDT Wed May 31 2017 Tonight partly to mostly cloudy across the ArkLaTex with overnight temperatures in the mid 60s north of I-20 and the lower 70s south of the I-20 corridor. This weekend's weather will come from the Pacific northwest, an upper level low pressure system will move to the northeast into the Plains and across the region. The stationary front will be pushed through the area by a strong trough of low pressure moving into the Rockies and Plains. Expect hot and muggy conditions this weekend with temperatures in the mid to upper 80s area wide can't rule out some areas reaching the lower 90s.
1215 PM CDT Wed May 31 2017 Today will be sunny with light northwest wind at 10 to 15 mph and high temperatures in the lower 70s across the region. Early morning satellite imagery showed the last of the low clouds exiting to the east, with clear skies across much of Minnesota. The ageostrophic convergence associated with the upstream ridging is the driving force behind the H500mb height rises that become centered across the region this afternoon and will literally squash any chance for cloud development. The ridge axis will shift eastward Thursday which will mark the beginning of a much warmer pattern for a few days. PWATs begin increasing markedly Thursday night with the arrival of an elevated warm front.
In the middle to upper levels (700-200 mb), latest available satelitte imagery overlaid with model streamline analysis as of 200 pm depicts the continuation of a cyclonic pattern across much of the northern half of thru CONUS, with a zonal, weakly cyclonic flow pattern across the South Central and Southwestern CONUS where the next developing trough is now taking shape from Utah to West Texas. East of that, South Florida and the Keys are beneath the northern periphery of a rather expansive deep warm core anticyclone centered near Belize.
1119 AM PDT Wed May 31 2017 A weak low pressure system moving through California will bring cool weather and extensive coastal clouds through Thursday.
235 PM CDT Wed May 31 2017 Ridge aloft will bring mostly dry conditions to the region through Thursday.
1239 PM CDT Wed May 31 2017 Light onshore winds settling in over SE TX this afternoon as high pressure moves further east of the region. This low-level pattern is a becoming a bit more favorable for the development of the sea- breeze, and along with progs of low convective temps will be keep- ing the mention of VCTS/VCSH in for all sites through the rest of the afternoon. Water vapor imagery shows weak ridging over SE Texas with an upper level low over the Rio Grande/Big Bend area.
213 PM CDT Wed May 31 2017 An upper trough is centered just north of the Great Lakes area and another upper trough is beginning to move over the Pacific Northwest. The upper trough over the west coast moves further east on Thursday.
Weak moisture convergence north of low level ridge axis was producing more congested cumulus from the Cape northward and inland. High pressure ridge will remain prominent over the western Atlantic with an axis extending to central Florida.
246 PM EDT Wed May 31 2017 Scattered showers and thunderstorms will linger into this evening before weak high pressure builds in later tonight and Thursday to provide mostly dry weather.
243 PM EDT Wed May 31 2017 A zonal flow aloft will be over the region for the rest of the week, with some weak troughing associated with a stalled front.
1231 PM CDT Wed May 31 2017 VFR could be compromised toward daybreak Thursday, mainly at LBB where deeper moisture will be first to arrive, possibly accompanied by TSRA as a slow moving trough passes overhead.
139 PM MDT Wed May 31 2017 As a long wave low pressure trough moves inland along the West Coast, the high pressure ridge extending from the 4 corners into the northern Rockies will shift east into the northern and central Great Plains.
343 PM EDT Wed May 31 2017 A weak cold front will slip south of the Ohio River tonight as high pressure builds into the Ohio Valley. The high will remain over the area into Thursday. Lows tonight will dip into the lower 50s for another night. High pressure will remain across the region with a few fair weather cu developing later in the day.
326 PM EDT Wed May 31 2017 A cold front will sweep east and cross the region accompanied by showers and thunderstorms.
Thursday is going to be a much cooler day with showers and a few thunderstorms.
213 PM MST Wed May 31 2017 Warm and dry conditions will persist through the weekend across the lower deserts.
342 PM PDT Wed May 31 2017 A low pressure system will continue to move east away from the region tonight. High pressure will build in behind the system, bringing dry and warming conditions through the end of the week. An upper level trough continues to move through the region this afternoon. The increased clouds and precip combined with the cooler air brought in by the frontal system are producing afternoon temperatures around 15 to 20 degrees lower than yesterday, well below seasonal normals for the end of May. A dry and warming trend will begin on Thursday as the upper low continues to sink southeastward toward northern Mexico and high pressure builds inland across California. This ridge will amplify through the weekend ahead of another developing low pressure system in the northeast Pacific.
Upper air pattern consists of a 500 mb trough over the ern U. and on the west coast with a ridge over the Rockies 12z Thu. The trough remains over the ern U. through 12z Sat with the ridge getting squeezed into the northern plains as the trough in the western U. In the extended, GFS and ECMWF show a persistent trough over the ern U. with what look like an omega block in Canada with troughing to the east, ridge over Nunavut and Manitoba and troughing over the Canadian Prairies 12z Sat. Troughing continues to remain over the upper Great Lakes 12z Sun through 12z Tue, then a ridge moves into the area for 12z Wed. Conditions will continue to improve as high pressure works into the area.
The weather pattern through Thursday will be dominated by an upper level ridge, which will bring much above normal temperatures to the region.
Upper ridge of high pressure meandering over Colorado this afternoon along an axis running from northwest to southeast Colorado. Steering flow under ridge is very light, only about 5-15 knots. As the disturbance moves through the ridge over Colorado, it weakens and, therefore, doesn't look as strong tomorrow over Colorado as it does over New Mexico today.
307 PM EDT Wed May 31 2017 Scattered showers and thunderstorms will linger into this evening before weak high pressure builds in later tonight and Thursday to provide mostly dry weather.
255 PM MDT Wed May 31 2017 Current surface analysis shows frontal boundary south and west of the forecast area, with low pressure along it across eastern CO. High pressure is centered over eastern SD. Upper level analysis shows large scale trough over much of the eastern US, with a ridge over the Rockies. Temps are in the low to mid 70s across much of the plains, with 60s over the Black Hills. Warming trend will continue over the next couple of days as ridge slowly shifts east into the plains.
Continued weak low pressure lingering over the forecast area along with a good amount of moisture with some instability and disturbances moving up from the south will keep the forecast unsettled. /Pelatti 18Z TAFS: Weak low pressure lingering over the aviation area with a somewhat unstable airmass coupled with weak disturbances running up from the south will support the mention of convection in the form of showers today and tonight.
Atlantic high pressure will extend across FL today with southeast and south low level flow that turns to southwest and west as a sea breeze forms during the afternoon. Atlantic high pressure ridging westward across the waters will maintain modest winds that shift to onshore in the afternoon.
607 PM EDT Wed May 31 2017 A large upper level low pressure system with several weak disturbances will bring scattered thunderstorms this afternoon ending this evening.