Aikyam-Lab/Synoptic-Bench huggingface dataset:
340 PM CST Mon Feb 5 2018 Mid-afternoon sfc analysis shows the forecast area caught between a pair of weak boundaries, the first the remains of yesterday's cold front lingering just beyond the outer coastal waters and the other a sfc trof/weak cool front extending through the cntl/srn Plains states. and the retreating warm front could help produce a few showers starting this evening, especially over the srn 1/2 of the area. Temperatures across the srn zones are likely to stabilize not long after sunset and hold relatively steady the remainder of the night as the warm front passes.
158 PM CST Mon Feb 5 2018 In the upper levels an upper trough moving down out of the NW will cross the Great Basin early Tuesday and swing down across NM late in the day.
Cloud cover decreases as high pressure builds over the Upper Midwest tonight. No additional snow is expected Tuesday and high temperatures will be in the upper teens to the low 20s. Broad upper trough will remain anchored over the mid section of the country with several waves transiting the region bringing periodic chances for additional snowfall.
Cross sections show that there was a bit of slightly warmer air between 850-700mb that kept the snowflakes from being dendritic over central and southern Iowa and that was the observations at our office today. By 8pm tonight, the snow will have shifted east of much of the forecast area as large scale subsidence and drier air associated with high pressure moves into the state. /Tuesday night through Monday/ Area of high pressure will be moving over Iowa Tuesday morning. This area of high pressure is relatively shallow with more southerly to westerly flow above 2 kft.
Seeing some mPING reports of light freezing drizzle east of the KC Metro, but this looks to be very light falling out of high cloud bases. Main uncertainty is with the borderline thermo profiles for snow- sleet-freezing rain, and a degree or two either way will create a somewhat disproportionate change in precip type(s).
245 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
254 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
244 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
348 PM CST Mon Feb 5 2018 Upper level trough east of the area will continue to move east. Flat upper level ridge will move over the area tonight. A broad longwave trough over the Hudson Bay region and a dominating ridge over the eastern Pacific/western U.
Winds will gradually decrease throughout the day, and become northeasterly overnight as another cold front begins to move into the area.
333 PM EST Mon Feb 5 2018 High pressure will build and be in control of the pattern for the majority of the week.
317 PM EST Mon Feb 5 2018 A secondary cold front has pushed off the coast. High pressure will build over the local area tonight.
406 PM EST Mon Feb 5 2018 Some light snow will occur ahead of a weak cold front that will cross the area late tonight into Tuesday morning.
The precipitation ended from west to east this morning/early afternoon behind the departing mid level trough. Behind this system, a cold frontal boundary was pushing south through our region, with the boundary located from KOFK to KHSI and KHYS at 20Z. The track of the system places the highest snow amounts of 3 to 4 inches across north central Kansas, with 1 to 3 inches possible across south central Nebraska on average.
After a brief warmup today, wind has shifted northerly, and the cold Arctic high pressure as begun to return for another night.
128 PM EST Mon Feb 5 2018 High pressure building into the area tonight will move off the coast Tuesday.
313 PM CST Mon Feb 5 2018 Upper level trough over western Missouri into Minnesota is rapidly approaching, moving ESE toward central and northern IL. Snow is already spreading into a band from Burlington to La Salle as expected, while additional snow trailing southward from Burlington is poised to spread through most of central and even southeast Illinois this evening as the trough pushes eastward. The area south of I-70 could also see periods of freezing drizzle as pockets of shallower cloud depth lead to loss of ice crystal formation aloft.
332 PM CST Mon Feb 5 2018 Clouds were slow to erode today, especially across the Rolling Plains, where temperatures were a little slower to rebound from last night's cold front. Our next cold front was pushing into the northern TX Panhandle this afternoon and is poised to arrive into the CWA this evening. As our next cold front settles in overnight, so too, will a bit of low-level moisture. This will not be the drought- busting moisture any of us have been hoping for, and most likely precipitation will come in the form of drizzle/freezing drizzle.
Have made some adjustments to the morning forecast to bring the sky conditions in line with the current observations, but given high pressure and the stagnant pattern, no other updates appear necessary. Offshore high pressure and a thermal trough along the coast will both persist into the middle of the week.
A cold front will move across northeast Kansas late afternoon through early evening shifting winds from the north through the night. Models have trended the highest QPF amounts north of Interstate-70 which is supported by an elongated frontogenetical band at 600-700mb seen in both the GFS and NAM. The best lift moves over the area in the afternoon and expect this is when we will see the highest snow rates. In areas most likely to see the highest snow totals, have opted to issue a Winter Weather Advisory for tomorrow. This may result in patchy freezing drizzle in some areas with the best chances for this near east central Kansas. Precipitation clears the area by midnight and high pressure moves over Kansas clearing skies and bringing lows into the single digits for Tuesday night.
Weak warm advection that created the precipitation over the northern mountains earlier this morning will transition to cold advection this afternoon and tonight as a weak trough carves it's way into the eastern Great Basin. This area of showers will expand farther south into central Utah tonight as the trough settles into the region.
A little cooler today under stronger northwewsterly flow aloft than yesterday. Warmer in eastern Oregon and southwestern Idaho again Tuesday as flow aloft backs to west-northwesterly.
248 PM MST Mon Feb 5 2018 Scattered snow showers have picked up with daytime heating today across northwestern Colorado in narrow bands of convection just ahead of an approaching trough. The trough advecting colder air into the region will pass northwest to southeast through eastern UT and western Colorado tonight and into Tuesday morning. As the trough passes through late tonight, a band of precipitation is expected to develop south of I-70 and as far south as the northern San Juans. With this trough's convective nature, brief whiteout conditions will be possible through Tuesday morning where heavier showers pass through. The atmosphere stabilizes Tuesday evening leaving cooler northwesterly flow in place.
CIGs should improve to MVFR this aftn as some drier air tries to build southward in the lowest levels of the atmosphere. A return to IFR CIGs xpctd tonight as a coastal trough inches NW closer to the coast and as isentropic upglide increases. CIGs likely to lower to LIFR levels late tonight thru Tues mrng as trough gets even closer.
A cold front was moving into the northern Texas Panhandle this afternoon. The cold front will be moving into the Big Country Tuesday morning, and midday in the Concho Valley, and afternoon along I-10. Went cooler with highs in the upper 30s to lower 40s in the Big Country tomorrow. Added patchy drizzle in the Concho Valley and areas east and south tonight after midnight as a warm front temporarily moves north. There is a 20 to 40 percent chance of rain Tuesday as the cold front pushes the moist air associated with the warm front, back south.
High pressure centered over the Ohio Valley today will slide to the mid-Atlantic and into the Atlantic tonight. Lows will be in the low to mid 40s (slightly above normal) except for the upper 40s along the coast.
Temperatures should stabilize and winds diminish a bit as the high slides into the northern plains so expect to be able to expire the wind chill advisory around 11am. Ebert 3am Forecast Discussion: Snow that has been occurring over the southwest part of the forecast area overnight will diminish this morning as high pressure builds into Northeast Montana. Skies will clear over the northeast half of the region today and remain mostly clear tonight with high pressure over the area. Another high pressure system moves through Tuesday Night with partly cloudy skies and low -5 to -15 in most areas.
Late tonight, another cold front will move southwestward through the area, with MVFR ceilings expected to return to HOB/INK/MAF by around 09Z- 11Z, potentially deteriorating to IFR thereafter, with little improvement then expected through the end of the forecast period. Another cold front will move southwestward into the region late tonight. Another cold front is expected to push into the area Tuesday morning cooling temperatures down for Tuesday afternoon.
First chance for freezing rain will be early Tuesday morning, and temperature profiles certainly support freezing precip with 850mb temps near >3C. Main threat for freezing rain/sleet would appear to be later in the day Tuesday and Tuesday night.
A few streamer showers could affect southern TAF sites overnight, with chcs increasing at BPT/AEX after 12Z as a cold front approaches from the northwest. As high pressure shifts off to the east through the day, winds will turn from northeasterly to southeasterly. For the most part, we will get only the southern edge of this high, as it is forecast to quickly move eastward today. But enough influence to bring brief clearing through this afternoon along and north of I-10 and cooler air with highs this afternoon in the upper 50s to lower 60s, near seasonal levels.
Otherwise, the Arctic high pressure area to our northwest will settle over the region tonight with skies clearing and winds going light. The models then show a short wave trough dropping in from the northwest on Tuesday spreading clouds across the cwa along with some light snow. Warmer air advecting in on south winds will bring highs in the teens and 20s by late afternoon.
High pressure over the eastern Pacific will continue to result in dry weather conditions across the region through the forecast period. Forecast models indicate the ridge of high pressure will remain in place and build slightly toward the coast. By the upcoming weekend, temperatures are forecast to cool by a few degrees as a mid/upper level trough slides down into the Pacific Northwest and then inland to our east. SFO Bridge Approach. Northerly winds will increase through the day today as coastal troughing strengthens along the central and northern California coast and interacts with high pressure over the eastern Pacific.
443 PM EST Mon Feb 5 2018 A weak area of low pressure will pass well north of the region late tonight and Tuesday. An area of low pressure will take shape over the Mississippi Valley Tuesday night, and will bring a significant snowfall to much of the region starting late Tuesday night.
1245 PM EST Mon Feb 5 2018 High pressure will build into the region this afternoon. An upper level disturbance tracking across the lower Great Lakes will result in snow for parts of the area tonight. High pressure will offer a temporary dry period Tuesday with temperatures a little below normal.
Temperatures generally in the lower and middle 60s, with dew points ranging from mid 40s north to mid 50s far south Louisiana.
High pressure will be moving across the forecast area tonight which will help to usher in light winds. Saturation becomes fairly deep again with very efficient -10 to -20C temperatures in the lowest 3km.
Instability will remain elevated as warm front should remain south of cwa.
A ridge of high pressure will then move into the region and bring cold yet sunny conditions along with it overnight into Tuesday.
A sharp trough approaching from the northwest will intensify these snow showers overnight across eastern Minnesota into western Wisconsin. A stronger trough over the Great Lakes, central and eastern Canada has shifted this further south from previous forecasts. While this prevents a stronger surface cyclone, heavy snow accumulations still look probable somewhere across the Plains/Midwest given multiple rounds or prolonged light/moderate snow. Could be a bit gusty to the west for a time but overall becoming light nw-w overnight as ridge moves in.
330 PM EST Mon Feb 5 2018 Zonal-progressive flow across the continental United States supports an eastward moving high pressure system centered over the Ohio River Valley. A weak low level trough is across the Florida Keys. Visible satellite imagery reveals large areas of stratus and sea fog across the cooler waters of the southeastern Gulf of Mexico. Based on this report, we surmise dense sea fog prevails across the cooler waters of the southeastern Gulf of Mexico, including portions of the Bay and Gulf Side waters.
Tonight winds will shift southeasterly and occasionally calm as high pressure moves across the Carolinas. Tomorrow high pressure meanders into the mid-Atlantic, and heights rise as upper level ridging builds briefly across the Caribbean. Moisture increases through the lower and mid levels, with onshore southeasterly flow at the surface and southwesterly flow off the Gulf through 500mb. High temperatures in the low to mid 70s are expected.
325 PM EST Mon Feb 5 2018 A weak area of low pressure will pass well north of the region late tonight and Tuesday. An area of low pressure will take shape over the Mississippi Valley Tuesday night, and will bring a significant snowfall to much of the region starting late Tuesday night.
On Tuesday, an upper trough axis will drop into the desert southwest. Ahead of this trough, we will see an increase in southwesterly flow aloft.
313 PM EST Mon Feb 5 2018 High pressure will extend across the region through Tuesday.
Coastal low/trough are in the process of developing off the lower TX Coast with isentropic upglide persisting enough across S TX to result in a continuation of cloudy skies today.
Expecting instability type banded snow showers to continue into the evening hours, most numerous along the southern portion of I-25 where the baroclinic band resides along the cold front.
1050 AM MDT Sat Jun 10 2017 A pretty decent cold front is move southwestward across the plains at about 15 knots right now. The air behind the front is somewhat cooler with dew point readings about 10-20 F higher. May alter the highs a bit. Now more stability is moving in behind the cold front. Strong southwest flow aloft has kept valley inversions from forming in most of the high country. There is a cold front pushing south across southeast Wyoming and the Nebraska panhandle early this morning, but this feature will weaken and eventually wash out as it encounters strong daytime heating and mixing of very warm southwest flow aloft.
The upper level low continues to advance towards the Pacific coast, and is expected to be over northern California during the overnight hours. Showers and cooler temperatures will continue on Sunday in response to the low as it continues to dive across the Desert Southwest.
A slow moving area of low pressure will lead to windy, dry and cooler conditions today and Sunday. Otherwise, satellite shows high clouds associated with weak disturbance southwest of San Diego being incorporated into the southwest flow ahead of deepening trough over the northeast Pacific/Pacific Northwest.
732 AM EDT Sat Jun 10 2017 Aviation Winds will increase today as low pressure deepens across southern Canada.
530 AM MDT Sat Jun 10 2017 Current surface analysis shows cold front moving southeast across western SD, with gusty northwest winds behind it. Upper level analysis shows ridge now east of the region, over the upper MS river valley, with southwesterly flow in place from the west coast to the northern high plains ahead of upper low off the Pacific NW coast.
1155 AM CDT Sat Jun 10 2017 Mid/upper level ridge will continue to push eastward across the area as well as amplifying through the day today. Expect similar conditions as yesterday sensible weather wise, just another couple of degrees warmer and slightly more humid, though still comfortable dewpoints for mid June standards. Should be another clear night, with lows several degrees warmer mainly due to the increased southerly surface flow. Gosselin Slightly warmer and more humid conditions can be expected on Sunday with upper level ridging just east of the forecast area, and continued southerly surface winds.
1006 AM EDT Sat Jun 10 2017 Sub-tropical high pressure will expand across the southeastern U. WV satellite imagery and 12Z RAOB data indicate a longwave trough spans the length of the U. As the trough moves ewd, sub-tropical ridging now extending from near the FL peninsula to the mid MS Valley and upper Midwest will strengthen and expand across the southeastern U.
/ISSUED 400 AM CDT Sat Jun 10 2017/ Water vapor imagery shows a weak upper level low over SE Texas that has formed from the remains of a mesoscale convective system that decayed over central Texas.
1025 AM CDT Sat Jun 10 2017 Southerly winds on the increase this morning with high pressure to the east and troughing to the west.
High pressure dominates with light SW winds at the surface and plenty of sunshine. Expect seasonal afternoon highs in the middle to upper 80s across the central and southern valley with highs in the lower 80's over SW VA and NE TN. Chattanooga Airport, TN 87 66 89 68 / 0 0 0 10 Knoxville McGhee Tyson Airport, TN 85 65 87 65 / 0 0 0 0 Oak Ridge, TN 86 65 88 65 / 0 0 0 0 Tri Cities Airport, TN 83 61 85 60 / 0 0 0 0.
928 AM PDT Sat Jun 10 2017 Today will be cooler than average with scattered showers and an isolated thunderstorm possible.
647 AM CDT Sat Jun 10 2017 A broad mid level ridge will continue to push into the area Today. Squeeze play between high pressure over the southeast US and deepening low pressure over the Rockies will enhance the winds vs previous days.
/issued 358 AM CDT Sat Jun 10 2017/ A weak upper trough can be seen in the latest water vapor satellite loops over East Texas. The increased moisture combined with some very slight enhanced lift and onshore flow from the upper trough over Texas should result in isolated diurnal convection on Sunday, mainly along and south of Interstate 20.
912 AM CDT Sat Jun 10 2017 A fairly nice Saturday is in store across the TN Valley, as high pressure continues to build across the region.
Isolated to scattered convection is expected to develop later this afternoon across mainly Florida near the coast with the highest chances across the southeast big bend. Nearly zonal flow aloft will become more southerly as an upper level low digs further south in Texas. High temperatures will be a few degrees warmer than yesterday with highs in the upper 80s to lower 90s.
Satellite water loop shows a large mid/upper level low pressure system continuing to move SE with the center of the low over the near shore waters of the Pacific just west of the central Oregon coast. The low will move into SW Oregon this afternoon. As such the low will spread increasing moisture into central and NE Oregon this afternoon for another day of numerous showers and isolated thunderstorms over the highlands of eastern Oregon. Aside from increasing the high temperatures for today by 1-2 degrees at elevations below 2000 feet, the current forecast is on track.
1025 AM EDT Sat Jun 10 2017 Early visible satellite photographs show skies are mostly cloudy with temperatures averaging in the lower 80s along the island chain. Surface wise, a discernible trough extends from the Yucatan peninsula northeastward into south central Florida peninsula. With our area between a trough to our north and an organizing western Atlantic ridge, southeast to south winds near 15 knots will turn east to southeast and slacken some this afternoon, hence, no headlines will be required on our marine district.
Showers and a few thunderstorms continue in area of upper troughing/cold mid levels as per -15 C pool at 500 mb. These are expected to be suppressed by afternoon with passage of the supporting disturbance/onset of ridging aloft. Dry, warm, and more humid weather will ensue with the building of broad high pressure this weekend. VFR conditions are expected through the TAF period, though scattered showers should continue early this morning with the passage of a weak trough. Building ridging is expected by afternoon. Shower/tstm restrictions are possible by Wed as the high pressure ridge erodes.
1009 AM EDT Sat Jun 10 2017 Building high pressure will dry weather and warm temperature for the start of the new week. Remaining showers will be suppressed shortly via subsidence under building high pressure. Southerly boundary layer flow under amplifying ridge aloft will support further warmth and humidity into Sunday. Warm and more humid Upper Ohio weather will continue with the ballooning of a broad, Eastern CONUS high pressure as a deep Great Basin low digs.
Slowly strengthening southwest winds aloft next 24 hrs as upper low develops over PacNW and drops into nrn CA.
749 AM EDT Sat Jun 10 2017 Above normal temperatures are expected through mid to late week in association with an amplified upper level ridge over the region.
544 AM MDT Sat Jun 10 2017 Water vapor imagery this morning showing a strong low pressure system off the Washington/Oregon coast tracking slowly southeastward towards northern California.
The highest coverage is still expected to be over the interior counties after 18Z. On Sunday, the front washes out as high pressure ridges west across Florida and into the Gulf of Mexico.
Dewpoints creeping into the low to mid 60s over much of the Susquehanna Valley will begin to make it feel uncomfortable.
1110 AM CDT Sat Jun 10 2017 High pressure ridge axis has moved off the Atlantic coast, but weather for Central Illinois will remain dry and hot today. A tightening pressure gradient will result in a breezy day, and temps moving into the low 90s will mix down some gusts in the 25-30 mph range later this afternoon. 07z/2am surface analysis shows 989mb low over eastern North Dakota with warm front extending southeastward to southern Lake Michigan. As upper ridging continues to build into the Midwest, the warm front will get nudged further northward today. Pressure gradient will increase well ahead of the cold front and with deep mixing taking place to about 6000ft, am expecting wind gusts of 25 to 30mph from late morning through the afternoon.
Precipitation was due to a weak cold front with a frontogenesis band moving into the W this afternoon, and a second area of frontogenesis moving through the SE this afternoon and evening. Models agree we will see some brisk W/SW flow over our region today behind last nights short wave, while the upper trough to the west slides slowly south along the west coast.
639 AM CDT Sat Jun 10 2017 Mid/upper level ridge will continue to push eastward across the area as well as amplifying through the day today. Expect similar conditions as yesterday sensible weather wise, just another couple of degrees warmer and slightly more humid, though still comfortable dewpoints for mid June standards. Should be another clear night, with lows several degrees warmer mainly due to the increased southerly surface flow. Gosselin Slightly warmer and more humid conditions can be expected on Sunday with upper level ridging just east of the forecast area, and continued southerly surface winds.
A low pressure system off the Oregon coast will continue moving southeast, eventually reaching Nevada Sunday evening.
1125 AM EDT Sat Jun 10 2017 Update/Marine Winds will increase today as low pressure deepens across southern Canada.