Aikyam-Lab/Synoptic-Bench huggingface dataset:
243 PM PST Sun Mar 4 2018 High pressure aloft and weak offshore flow will bring a warming trend with lower inland humidities and gusty northeast winds near the coastal foothills. a trough of low pressure off the West Coast will bring a return of moist onshore flow, along with cooler weather and a chance for rain and mountain snow.
850 PM CST Sun Mar 4 2018 Rain and clouds will continue to move into the Mid-South during the overnight hours as a warm front moves into the area. The rain is ahead of a warm front which will move into western sections of the forecast area tonight. Temperatures will be some 10 to 15 warmer tonight than last night with lows Monday morning in the mid 40s to around 50 degrees. On Monday, a cold front will move into central Arkansas by the afternoon and reach western sections of the forecast area by early evening. Temperatures will remain above normal on Monday with highs in the low to mid 60s. On Monday night, the cold front will move through the forecast area with more showers expected mainly during the evening hours.
1033 PM EST Sun Mar 4 2018 High pressure will bring fair skies and dry weather Monday.
Current temp trends, along with consensus of short range model guidance, suggest warmer lows than those forecasted. On Monday, the high pressure system will move off to the east, and south winds will develop as a cold front advances across the Ms Valley.
Going into the early morning hours on Monday, a Pacific cold front will work its way through the region from west to east shifting our winds from southwesterly to northwesterly. In the wake of the front, in-conjunction with the main upper level low deepening over northeastern Nebraska, winds will be quite gusty, especially in the northeastern Panhandles closer to the main system. Periods of mid level ridging moving across the region throughout the forecast period will reinstate the dry conditions across the region.
709 PM EST Sun Mar 4 2018 High pressure will remain in control of the region through tonight. Winds will become more easterly overnight as the center of high pressure begins to shift east of the region with the southerly axis across the state. These east winds will continue through much of the day tomorrow with similar afternoon temperatures to that of today, in the high upper 40s in the north to mid and upper 50s in the south. A secondary low will have developed on the southward extent of the occluded front, and will be located over the mid Mississippi Valley by 21Z Monday, with a warm front extending SE into portions of KY, and a cold front oriented just along the Mississippi River.
High pressure will remain in control of the region through tonight. Winds will become more easterly overnight as the center of high pressure begins to shift east of the region with the southerly axis across the state. These east winds will continue through much of the day tomorrow with similar afternoon temperatures to that of today, in the high upper 40s in the north to mid and upper 50s in the south. A secondary low will have developed on the southward extent of the occluded front, and will be located over the mid Mississippi Valley by 21Z Monday, with a warm front extending SE into portions of KY, and a cold front oriented just along the Mississippi River.
Weak ridging will build in tonight into tomorrow, bringing quiet weather for a few days. Monday will be one of the warmer days we've seen in a while, with temperatures over the west side reaching the mid 50s and 40s east of the Cascades.
Areas of freezing fog are possible early Monday morning as well.
454 PM MST Sun Mar 4 2018 00Z TAF CYCLE A dry Pacific cold front will move from NW to SE through wrn NM this evening and overnight, with winds becoming nwly behind the front. Overall eastward progression of the cold front and upper storm system have been slower than what was previously forecast, allowing temperatures this afternoon to warm more than what even the 12Z guidance was indicating. In fact, the cold front only just reached KFMN.
As the low level jet kicks in tonight, this will lift from south to north.
Surface analysis and visible satellite imagery continued to indicate a weakening ridge shifting E of the TN Valley region this aftn, with a disturbance approaching the area from the W/SW.
700 PM EST Sun Mar 4 2018 High pressure will extend over the region through Monday night.
629 PM EST Sun Mar 4 2018 High pressure through Monday. Warm front Monday night.
Radar trends have exited but ground sensors are still reporting fog and low stratus along with freezing drizzle.
Cigs will continue to lower overnight into early Monday morning as the low- levels continue to moisten and -DZ and BR form. A cold front will move through during the afternoon and this will help to lift cigs for early afternoon. Upper air analysis this morning showed a ridge over the middle of the country with the ridge axis extending northward from East Texas. A cold front will move through the region Monday.
This low will be accompanied by a strong cold front which will surge east through the mid-MO Valley tonight into Monday morning. Latest model guidance suggests that increased forcing for ascent attendant to the mid-level trough will aid in the development of a narrow band of convection along the surface cold front that will approach our northwest counties in the 03-06z timeframe. Deep-layer cooling behind the cold front is expected to support a transition from rain to a mix of rain and snow or all snow late tonight into Monday morning over northeast NE. By Monday afternoon, we will likely see a decrease in precipitation potential across much of the area with the exception being along the SD border which will remain subject to wrap-around snow in the immediate vicinity of the deep-layer cyclone.
An associated cold front was positioned across Colorado and New Mexico. the cold front is expected to catch up to the dryline and make its way across West/Central Oklahoma and push into Eastern Oklahoma around 12z Monday morning. Lows in the upper 40s in Osage as the front moves in to the low 50s elsewhere are forecast.
The upper low over eastern Montana is the synoptic feature creating difluent flow over the front range, which in turn will drive a cold front east overnight, developing deep northwest surface flow. There is a signal for stronger winds as well on the high plains of west central Kansas, that also appear to weaken with respect to HWW criterion after noon.
A pre-frontal trough will move into South Texas during the afternoon with south-southwest flow over the coastal plains while winds shift to northwest over the western Brush Country.
This kept mainly light rain or light freezing rain/drizzle tonight most areas with snow increasing/ fzra decreasing Monday morning. Fog and drizzle continued in the southwest, but convection with rain, freezing rain, and snow with scattered thunder developed this afternoon in an arc from Beach/Medora across north central North Dakota, into Jamestown/Fargo area. The upper low moves southeast towards eastern South Dakota by Monday afternoon.
A cold front will move through the area from west to east between 18-00z Monday afternoon, signaling an end to the precip and bringing gusty W/NW winds with it.
Dangerous Surf and Seas with Significant Beach Erosion Continuing The axis of the east coast ridge will orient itself down the peninsula overnight, allowing light low-level north flow to weaken while gaining a more onshore component with time.
Chilly conditions are expected again tonight with overnight lows down near freezing in the inland valleys.
Further east where surface winds have been more backed to the south southeast dewpoints have increased into the low to mid 40s. The upper level trough was moving across the Rockies. Tonight, the upper trough is forecast to move out into the Plains with the trough axis rotating eastward across eastern Kansas Monday morning.
Partly cloudy skies and an isolated snow shower over the higher terrain of Clark and Lincoln County into the early evening hours.
This wave is a bit cooler and will impact our northern mountains through Saturday evening. Temperatures will be running a bit cooler today in most areas with continued cooling anticipated for Saturday behind this newest front. This forecast is not without some complications as we are seeing rather dry conditions sweeping back into the lower valleys of west-central Colorado, where fine vegetation has started drying out.
345 AM CDT Fri May 26 2017 This mornings surface map indicates the area remains between high pressure over Florida and low pressure over the high plains states. Will continue to see southerly winds continue to bring in more moisture, mainly in the lower levels.
359 AM CDT Fri May 26 2017 Today: A mid-level ridge will gradually amplify as it moves east from the Western Plains to the Missouri Valley.
127 AM EDT Fri May 26 2017 The upper trough axis will shift farther east of the forecast area tonight. A pressure ridge extending along the Gulf Coast will direct a dry westerly flow into the forecast area through Saturday.
As this does, the pressure gradient will be tightened some between this feature and a developing low pressure system across the Southern Plains.
Windy and cooler conditions are forecast across northern Arizona on Friday. Less wind and a warming trend are expected this weekend as high pressure builds in from the west.
545 AM EDT Fri May 26 2017 Showers will end this morning as low pressure exits. Rain chances return tonight, continuing at times through the holiday weekend with another area of low pressure. Showers should continue to taper off this morning as low pressure and associated upper support exits. Mainly dry weather is expected by afternoon as weak high pressure builds in, though stratocu should persist with moisture under a temperature inversion.
Stacked surface and upper low is over Saskatchewan and Manitoba early this morning. Northeast Montana will remain in a cyclonic NW flow aloft on the southwest side of this low today and Saturday. Synoptic Setup: long range begins with a trough running down from the Northwest Territories through southern Manitoba and into the eastern Dakotas where it turns west and backs into the Colorado. To the west a ridge runs up the cascades from northern California through British Columbia. In between lies the high plains including northeast Montana under northwest to northern flow aloft.
301 AM EDT Fri May 26 2017 An upper low pressure system continues to pivot away from the region allowing showers to push away during the early overnight. Scattered showers and perhaps a few thunderstorms are once again possible Friday afternoon into Friday night as a low pressure system approaches the region.
An amplified upper pattern sits over the east coast with troughing digging into the western Atlantic between the Carolinas and Bermuda. The upper low and associated troughing moves northeast toward Nova Scotia by Saturday morning which will allow weak upper ridging and a more quasi-zonal pattern to set up over the southeast U. Behind this front, high pressure builds in over the Gulf of Mexico bringing sunny skies to the area.
137 AM EDT Fri May 26 2017 A large low pressure system will lift northeast of the area tonight allowing drier air to overspread the region and linger into early Saturday. Moisture and unstable conditions will return to the region over the weekend, ahead of a slow moving cold front. There is some concern for strong wind gusts across the higher terrain as the guidance shows 40 to 50 kt flow at 850 mb coming down the back side of the upper trough. On Friday, the cyclonic flow aloft will gradually be replaced by a flat upper ridge building in from the west. This ridge will support weak high pressure moving over the Southeast.
211 AM EDT Fri May 26 2017 Drier and warmer Friday with high pressure in control. Upper low continuing to move off to the east, as high pressure nudges into the region. A warm frontal boundary and upper disturbance will move into the region late tonight/early Saturday, kicking off showers and isolated thunderstorms again, becoming more numerous later in the day Saturday.
SHORT TERM (Now through Saturday): 500 mb ridge overhead will provide subsidence across Deep South Texas and the Rio Grande Valley through the period. The pressure gradient will strengthen today as low pressure across the southern Plains interacts with Gulf high pressure.
The low pressure currently over Oklahoma will drift northeast today and drag a cold front into Missouri this afternoon.
123 AM EDT Fri May 26 2017 Upper level low over Ohio Valley will move east across the area bringing chances for showers and storms through Friday. Well defined upper level vort max rotating through the base of the parent upper low bringing a shield of light rain through the Tri State area and coal fields. With the upper low passing this evening and the 500mb height gradient sharpening in its wake, expecting winds to increase tonight with ridge and mountain top gusts in the 25-35kt range. Temperatures should be significantly warmer over the Tri State and coal fields/southern mountains tomorrow with a better chance to see sun.
643 AM EDT Fri May 26 2017 High pressure building across the Southeast states today will promote dry and pleasant conditions. Warmer temperatures and a chance for showers and thunderstorms will return over the weekend. A cold front will approach from the west on Memorial Day. Low pressure continues to lift NE over southern New England this morning. With the low continuing to head NE today, expect deep layered WNW flow to promote dry, breezy and comfortable conditions under a partly to mostly sunny sky. Weak ridge aloft nudges into the region from the WSW tonight into Sat. Lows from the upr 50s NW to the low/mid 60s SE. Partly to mostly cloudy Sun w/ highs mainly in the low/mid 80s, except 70s Eastern Shore and at the beaches.
Clouds over SW VA and NE TN will continue to decrease early this morning as the upper trough over the Mid Atlantic states tracks offshore. Through today, we will have a dry NW flow across the area as a mid/upper ridge moves across TN/KY, allowing for mostly sunny skies and highs climbing closer to normal levels, in the upper 70s north to mid 80s south.
Broad upper ridge stretching from the western gulf to the mid Mississippi river valley will slowly shift east across the lower Mississippi river valley and northern gulf states through 12z Sat. Surface temps will be moderated somewhat especially near the coast and over the lower half of the forecast area due to the increased onshore flow. 32/ee High temps today will be slightly warmer compared to yesterday climbing to near seasonal levels for most locations, ranging from the to mid to upper 80s for most inland areas and the lower 80s near the immediate coast. Lows tonight will continue to be near seasonal averages ranging from the lower to middle 60s inland and the upper 60s to near 70 along the immediate coast.
Quiet night so far across the mid state as upper ridging builds into the area.
122 AM EDT Fri May 26 2017 WV imagery and RAP analysis indicated mid/upper level trough over the wrn CONUS with a downstream ridge from the cntrl plains through the upper MS valley into nw Ontario. At the surface, riding also prevailed from the lower MS valley through WI to wrn Lake Superior. Friday night: A weak trough/cold front is expected to slide across the U. Clouds will begin to increase from the west Saturday evening as the next broad trough of low pressure approaches the area.
For KELD and KMLU the lower ceilings will not be dropping until the mid morning and not lasting into the afternoon as other sites.
1209 AM PDT Fri May 26 2017 The low will push the marine layer. A weak upper-level trough of low pressure currently centered over the Southern California Bight will move east into the Los Angeles County later tonight and into the Lower Colorado River Basin by Friday morning. A weak warm air advective pattern does develop later tonight in the lower levels, possibly producing light rain or rain showers across the Southland. Warming aloft will begin Saturday behind the trough passage but the marine lyr should still be at least 3000' deep. Better clearing expected Saturday as the ridge builds aloft and onshore gradients weaken.
557 AM EDT Fri May 26 2017 Low pressure is developing in the Gulf of Maine this morning. Low pressure will continue northeast into the maritimes through tonight.
437 AM EDT Fri May 26 2017 High pressure will pass to the south through tonight.
Sunny skies are expected to prevail through the day as high pressure builds just south of the region.
An increase in southerly flow in the low-levels will lead to increased moisture and a return of low clouds across south central Texas tonight. Overnight low temperatures will be much warmer when compared to the last couple of nights.
506 AM EDT Fri May 26 2017 High pressure will bring a brief reprieve of dry, warmer weather today. Upper low continuing to move off to the east, as high pressure nudges into the region. A warm frontal boundary and upper disturbance will move into the region late tonight/early Saturday, kicking off showers and isolated thunderstorms again, becoming more numerous later in the day Saturday.
This has ramifications in the low levels, spinning up a strong low level jet and low pressure center, producing copious precip amounts. Temps should be able to achieve the lower 70s most places.
208 AM MDT Fri May 26 2017 Mean troughing will continue over the region through the weekend as a closed upper low spins over southern Canada.
315 AM EDT Fri May 26 2017 Showers will end this morning as low pressure exits. Rain chances return tonight, continuing at times through the holiday weekend with another area of low pressure. Showers should continue to taper off this morning as low pressure and associated upper support exits. Mainly dry weather is expected by afternoon as weak high pressure builds in, though stratocu should persist with moisture under a temperature inversion.
401 AM EDT Fri May 26 2017 A cloudy, cool, and wet day is expected across the North Country as coastal low pressure slowly moves away from Southern New England.
breezy southerly winds were keeping temperatures about 15 to 25 degrees warmer compared to 24-hrs ago. The surface frontal boundary is forecast to remain over Eastern Oklahoma with the dryline over far South Central Oklahoma during the day Saturday and begin to push southeast through the CWA Saturday night as the upper level trof axis. associated with the closed low in Southern Canada. thunderstorms look to dive southeastward through the region with the push of a cold front.
1043 PM PDT Thu May 25 2017 After this evening's showers and thunderstorms, strong high pressure will build over the region for this weekend.
A weak trough will move southeast across Oklahoma today with resulting northwest winds; however, surface moisture will increase substantially across southeast Oklahoma where isolated thunderstorms may form very late this afternoon or evening before dissipating with sunset.
The most recent radar scans has one of these active lines moving north- northeast through the Straits south of the lower Keys. Saturday's vertical profile looks good for a traditional cloud line, although by then parcels will contend with drier and warmer air in the lower levels.
336 AM PDT Fri May 26 2017 The low will push the marine layer. The upper trof that was forecast to provide enough lift for more drizzle or a shower or two really look too far east and too weak to do much of anything over CA. Max temps will remain below normal but will be a degree or two warmer than ydy as hgts will rise. A slight ridge builds in for Saturday and onshore flow will weaken to moderate levels. Sun and Mon are shaping up to be a pair of nice days with a 52 DM ridge in place.
432 AM CDT Fri May 26 2017 Current surface analysis places low pressure along the Saskatchewan/Manitoba border with frontal boundary dipping down near the Red River Valley, while high pressure stretches down just to the east of the continental divide. aforementioned upper low tends to loiter in place keeping cyclonic flow over our area, which may result in some showers developing primarily over northern locations this afternoon into early this evening. Saturday will bring the greatest chances for precipitation to our area as the upper low meanders through Manitoba and a notable short wave swings through the northern plains.
Much of the area wl rmn dry today, except ovr N AR where a developing warm front could set off WDLY SCTD SHRA/TSRA. Instability wl also be enhanced Sat aftn with sfc temps warming well into the 80s and dewpoints in the lower and mid 70s.
By the mid-morning, all activity will lift northeastward as a downstream ridge continues to build, with upper level flow subsequently becoming southwesterly. A large upper-level trough will advect out of the Central Rockies and approach the local area by the late weekend. The aforementioned warm front will undergo little northward movement during this time, permitting a moist and unstable airmass to build south of the boundary by Saturday afternoon. Primary hazards will reside with large hail and damaging winds, and cannot rule out tornadic potential near the warm front across central Missouri.
By noon, winds will turn more southerly to southwesterly for KAMA and KDHT as a cold front pushes back to the north. A slowly advancing cold front is expected to drop into the combined Panhandles during the course of the day on Friday, though timing of the advancement of this front may not prevent most of the region reaching into the upper 80s to mid 90s in spots.
A weak closed low is currently over southern part of Idaho which is causing wrap around precipitation into Lemhi County. A ridge of high pressure begins to build into the region by Saturday allowing temperatures to warm slightly.
326 AM MDT Fri May 26 2017 An upper level trough will extend fm the nrn Rockies into the nrn Great Basin and will move slowly eastward thru tonight. In the lower levels a Denver Cyclone will dvlp by early aftn and the convergence zone associated with this feature will be a focus for tstm development. Across the higher terrain some drier air will spread across today so showers and storms this aftn may end up being more widely sct. Across the higher terrain cross- sections show moisture will increase after midnight with some mid lvl ascent developing as main upper level trough begins to move into wrn CO. Saturday and Saturday night, the upper trough axis in the morning will stretch from northeast WY into southwesterly UT with a southwesterly flow over the cwa.
208 AM EDT Fri May 26 2017 An upper low directly overhead will slide quickly away today, leaving northwest flow in it's wake. Weak ridging will move in but many chances for showers and a few thunderstorms are seen through the holiday weekend.
623 AM EDT Fri May 26 2017 An upper low is sliding off to the northeast and leaving a cool northwest flow in it's wake. Weak ridging will move in but many chances for showers and a few thunderstorms are seen through the holiday weekend.
130 AM EDT Fri May 26 2017 An area of low pressure will push east of the region this evening. Lingering cloud cover will likely keep eastern zones a bit warmer tonight than western zones, but still anticipate a fairly uniform temperature pattern, with lows ranging from the low to mid 50s by the end of the near term period. A low pressure system will begin to quickly move towards the area Friday evening into Friday night. Weak cold front will be laying out across the region at the beginning of the period.
358 AM CDT Fri May 26 2017 Early this morning, a weak ridge stretched from the western Gulf Coast up through the Upper Midwest. However, the weak ridge is losing ground to clouds filtering in ahead of the next system moving into the region. For today, generally the cooler temps associated with clouds between the clouds streaming in from the west and the cu that will develop in any clear spots. Last couple synoptic runs of the models tracking significantly further south with the low itself. keeping much of the warm frontal feature out of Central IL. Significant MUCAPE across the region invof and behind the lifting warm front throughout the day.