Aikyam-Lab/Synoptic-Bench huggingface dataset:
631 AM CDT Wed Sep 27 2017 A surface cold front is currently located south of the area early this morning. Highs today will be cooler with highs generally in the upper 60s to the lower 70s as clouds and a cooler air mass will be over the region. Highs in the lower to middle 70s and lows in the 50s can be expected each day this week into the weekend. An upper level low will then move into the northwestern U. Ceilings will show slow improvement in the afternoon and evening hours as high pressure slowly moves into the region.
Currently, a low pressure system was over northern Manitoba, with a cold front extending from the low southwestward across southern Saskatchewan to northwestern Montana. The low pressure system moves southeast today as a western ridge builds over the Canadian Rockies. As the low pressure system moves southeast, the cold front will sweep southeast across North Dakota today. Light southwesterly winds this morning should become northwest today as the cold front moves through. Looking at partly to mostly sunny skies as a few clouds associated with the cold front and accompanying upper level impulses in the northwesterly flow aloft move southeast across North Dakota. Quiet weather expected through the work week as the Canadian Rockies upper level ridge builds into the region, bringing dry conditions and keeping seasonal temperatures in our area with highs in the 60s to lower 70s.
629 AM CDT Wed Sep 27 2017 Latest surface analysis early this morning shows that cold front has moved well southeast of the CWA. With clouds and cold air advection today, highs will be noticeably cooler than yesterday with highs in the 70s.
The synoptic setting revealed an upper level low centered across western Arizona, which continued to sponsor thunderstorm development across New Mexico and adjacent Southwest Texas. The southwest flow aloft continued to spread mid and high level moisture well into Kansas north of the front, but given how highly stable the lower troposphere is across our region, precipitation is having a very tough time making it back into southwest Kansas. The mentioned upper level low across Arizona will slowly lift northeast through the Rockies over the next couple of days, and this will eventually spread some rain showers far enough north and east across the Rockies, to reach far western Kansas. This will help increase southwest flow aloft across the Rockies, enhancing development of low level leeside trough.
1038 AM EDT Wed Sep 27 2017 Ridging continues across the Eastern CONUS with subsidence and dry air aloft across the forecast area limiting convection and clouds. Chattanooga Airport, TN 90 67 87 61 / 0 0 0 10 Knoxville McGhee Tyson Airport, TN 88 67 84 57 / 0 0 0 10 Oak Ridge, TN 88 66 84 57 / 0 0 0 10 Tri Cities Airport, TN 87 62 83 51 / 10 0 10 10.
/issued 400 AM CDT Wed Sep 27 2017/ SHORT TERM (Now through Thursday): Generally scattered showers and thunderstorms are forecast for the inland portions of the BRO CWFA as 500 mb low pressure over the California and Arizona border gradually moves northeast and over the Four Corners area during the period.
Temperatures were cooler in the wake of yesterday's frontal passage, with readings mainly in the 50s. On Thursday, a cold front will move into the region during the afternoon, but the preferred model blend supports a dry forecast through the day.
713 AM EDT Wed Sep 27 2017 A narrow band of MVFR stratus and broken line of showers will follow a cold front through SE Michigan during the morning. Northwest wind gusting near 20 knots by afternoon will promote a clearing trend as the initial stage of cooler and less humid air moves into the region. The shallow nature of the cold front will allow a weak veering of the wind before a narrow band of showers and MVFR ceiling arrive at the terminal. Cold front slowly sliding through southeast Michigan this morning with little fanfare (isolated light showers), but steady northwest winds today will lead to drier and cooler conditions.
Light snow will occur in the higher mountains, especially this afternoon and tonight, mainly above 9500 feet, with light rain showers becoming widespread across the northeast plains tonight. Cooler today as well with highs generally in the 50s across the northeast plains. Upper level low will lift north along the Utah/Colorado border Thursday.
However, there may be some temporary breaks in the low clouds that cause conditions to go VFR at all sites this afternoon.
A surface cold front is currently located south of the area early this morning. Highs today will be cooler with highs generally in the upper 60s to the lower 70s as clouds and a cooler air mass will be over the region. Highs in the lower to middle 70s and lows in the 50s can be expected each day this week into the weekend. An upper level low will then move into the northwestern U. Ceilings will show slow improvement in the afternoon and evening hours as high pressure slowly moves into the region.
Cold front is bisecting the state from roughly KDEQ to KLIT to KJBR attm. Today Through Thursday Night Seeing the highly anticipated cold front making slow progress into NW AR early this Wednesday morning. Unfortunately, with an upper low spinning over the SW US and ridging in place to the south, moisture will be very limited across the state as the front moves through. At the surface, high pressure will build in over the area through Thursday, although remaining centered northwest of the state.
853 AM EDT Wed Sep 27 2017 a trough aloft the Gulf of Mexico and FL will provide subsidence through today with generally dry conditions. A trough across Fl as high pressure builds into the Gulf will maintain benign winds and seas through the end of the week.
Weather maps this morning shows a short wave mid-level ridge extending from the western Gulf to up across the Tennessee River Valley. High level trof axis has shifted southeast, positioned from the Florida Peninsula to the eastern Gulf. Daytime highs today mostly in the lower 90s under sunny to mostly sunny conditions.
A cold front currently extends from northwest Ohio through southeast Missouri and into central Texas. The cold front will move through the remainder of the forecast area tonight with little if any thunderstorm activity expected. Cooler air will start to move into the region with lows Thursday morning mainly in the 60s. High pressure will build into the central Plains on Thursday.
Upper air analysis last evening showed a deep trough over the western half of the country with a ridge over the southern Mississippi Valley. At the surface, a cold front extended from Fort Worth to Sanderson to El Paso. The upper level trough will lift slowly to the northeast during this period. The cold front will also move slowly toward the south taking most of the period to reach our southern border. As the front moves south an upper level short wave trough will move across Central Texas. The eastern half of the area will see 1/4-1 inch with the higher totals over the central part of the CWA including the San Antonio area.
As Tropical Storm Maria creeps north off the coast of North Carolina, an upper level trough sitting over Florida and the eastern Gulf of Mexico is providing strong subsidence, resulting in fairly dry conditions. Otherwise, light winds and above normal temperatures will continue, with highs in the upper 80s to low 90s and lows in the low to mid 70s.
1039 AM MDT Wed Sep 27 2017 Current surface map shows high pressure across Wyoming into South Dakota. Upper ridge builds across the area Thursday with another warm dry day.
No change in thinking from overnight shift as upper low over western Arizona will result in a chance of showers and thunderstorms over northern Mohave County.
Approaching low pressure will bring more chances for showers Sunday afternoon, with a few thunderstorms possible. Highs in the lower to middle 70s may be a bit too high, if the clouds and rain showers linger through the afternoon.
451 PM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures through the weekend.
309 PM CDT Sat Aug 26 2017 Strengthening 1029 mb high pressure over western Quebec and ridging sw across the central Great Lakes and into central IL was providing another nice late summer day to the area. Highs Sunday mostly in the lower 80s, ranging from 79F at Galesburg to near 85F at Lawrenceville where more sunshine possible. Chances of showers and thunderstorms spreads se toward I-70 during Sunday night as cold front moves se into central IL.
Isolated to scattered storms over the higher terrain of central AZ will drift southwestward this afternoon. With the high centered over the Great Basin for at least a few more days, there is a climatologically favorable steering flow in place (at least for the Arizona portions of our forecast area). However, it looks like that high will help advect some drier continental air into Arizona leading to more of a "low grade" type of Monsoon situation wherein mountain storms fizzle as they move to the low elevations.
653 PM EDT Sat Aug 26 2017 Canadian high pressure will build across New England tonight and Sunday. Low pressure passes south and east of the area during the midweek period.
324 PM EDT Sat Aug 26 2017 High pressure over southeastern Canada will bring fair weather and a chilly northerly flow through the remainder of the weekend.
Abundant cloud cover and persistent northeasterly low level flow will keep temperatures on the cool side today, with highs mainly in the lower and middle 80s.
1158 AM MDT Sat Aug 26 2017 Broad upper ridging is strengthening across the SW quadrant of the CONUS with northwest flow aloft across the northern Great Plains. Surface analysis shows weak low pressure over central WY which will be the focus for storms development today. Surface obs also showing fog across the Pine Ridge reservation through central SD. also drawing in cooler air from MT. Good theta e advection ahead of the low over the SD plains along with a weak upper wave crossing the area will trigger storm development mostly across western SD.
Aloft, the stubborn blocking pattern remains in place, with a broad upper high over the southwestern US, upper ridge spanning Manitoba and Ontario, flanked by upper lows over the western provinces and Nova Scotia. At the surface, trough extends through the plains, with a warm front extending into MN. Ridging along the Ohio valley keeping the deep Gulf moisture feed at bay. As the upper low deepens and pushes eastward into the upper ridge, cold front will make slow progress eastward. By tonight, cold front will be pushing into central Iowa. Sunday, a slow moving cold front will continue to push east through the forecast area. Expect dew points in the low/mid 60s with afternoon temps ranging from the mid 70s to low 80s.
316 PM EDT Sat Aug 26 2017 High pressure will allow for continued dry conditions through the weekend.
130 PM EDT Sat Aug 26 2017 High pressure will allow for continued dry conditions through the weekend.
High pressure across the Great Basin will continue over the next several days.
Surface analysis this morning places Hurricane Harvey just north of Corpus Christi, Texas this morning while a ridge of high pressure is centered over the Great Lakes Region.
414 PM CDT Sat Aug 26 2017 Upper low in western MN with lead short wave moving across MN/WI now with bulk of precip in eastern MN into WI. The low clouds and drizzle will certainly affect western Wisconsin this evening. A few more showers are in central MN associated with the upper low. While the short wave is moving along, the upper low is slower and looks to intensify a bit tomorrow as another jet streak arrives in northern stream. Mid/upper ridging over the western CONUS builds toward the central CONUS during the first half of the upcoming week, and then retreats back southwest during the last half as a strong trough dives across northern Manitoba/Ontario and our flow locally becomes more zonal.
639 PM EDT Sat Aug 26 2017 High pressure over Ontario will move eastward to the New England States on Sunday.
This can be attributed to a tropical low parked over southern Texas and an expanding and strengthening upper ridge over the Intermountain west to start the short term. In fact the strength of this ridge will be mainly responsible for not allowing the tropical system to be ejected eastward. Models still like the southern divide mountains and adjacent valleys where orographics will be a tad stronger and subsidence just a bit less on the periphery of the ridge.
334 PM EDT Sat Aug 26 2017 High pressure over southeastern Canada will bring fair weather and a chilly northerly flow through the remainder of the weekend.
452 PM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures through the weekend.
1209 PM CDT Sat Aug 26 2017 Upper level ridge of high pressure is currently building over the western CONUS early this morning. Highs should again top out in the lower to upper 80s this afternoon. Lows tonight will fall into the lower to middle 60s. The upper level ridge of high pressure will remain over the western U.
315 PM EDT Sat Aug 26 2017 Dry conditions will persist through Sunday with lows tonight in the low to mid 50s and highs on Sunday in the mid to upper 70s.
A building upper level ridge across the western U. This is based on a large ridge of high pressure over the West & a trough over the Great Lakes. The ridge will be flattened somewhat by a broad area of low pressure well to the north. Hot air under this ridge will drift into the area as the stationary boundary is pushed east.
259 PM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures through the weekend.
The thicker cloud cover will keep temps in the valley and MN side of the CWA in the 60s today, with the far west possibly getting into the low 70s as the western edge of the cloud deck erodes this aftn. An upper level low will be exiting the region on Sunday, with showers lingering on the backside of the low. Still, highs will range from the low 70s in this area to near 80 further west in eastern ND.
127 PM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures for the weekend.
A trough of low pressure will continue to drape across the state through Sunday morning. The low center will then start to push offshore of the NE FL coast by Sunday afternoon. Weak low pressure offshore the southeast U. coast at the start of the period with a trailing trough axis extending southwest across the central Florida peninsula combined with abundant tropical moisture (PW's in the 2.
An upper ridge will remain centered over the Great Basin through tonight, Meanwhile, an upper trough will drop southeast from the southern Canadian Prairies into the western Great Lakes. Skies will clear out across the west after midnight, and cool into the lower 50s northwest. Then a strong upper level ridge builds across the western US giving way to high pressure over the central Plains.
A weak cold front may produce some extra clouds at VFR levels, especially at KDHT, but otherwise, tranquil weather is expected. Models have held on to idea of a weak cold front arriving Sunday afternoon and Sunday night.
1143 AM MDT Sat Aug 26 2017 An upper level ridge will be centered over UT today and tonight, with fairly dry northwest flow aloft over CO. There will probably still be enough moisture over the area for isolated afternoon and evening showers/tstms mainly over the higher terrain. Temps today are expected to be a little above average over the southeast plains, and around average in the high valleys, with highs in the mid 80s to lower 90s across the southeast plains and mostly in the mid 70s to around 80 in the San Luis and Upper Arkansas River Valleys.
There will be some additional low-level moisture across southern portions of the CWA as well as slightly lower 500mb heights, so we may see a few additional diurnally forced showers or an isolated thunderstorm on Sunday afternoon across the higher terrain features.
An upper level trough will drop southeastward into the northern Plains tonight with a cold front approaching our area from the northern Plains by 12Z Sunday. It appears that any convection associated with the upper level trough and associated cold front will remain just northwest of our forecast area tonight. Lows tonight will be a couple of degrees warmer than this mornings lows, but still a little below normal for late August.
310 PM CDT Sat Aug 26 2017 Northern trough is over Minnesota while the de-intensifying system to the south is now Tropical Storm Harvey and is dumping rain over eastern Texas which has led to flooding and flash flooding. Forecast challenge: Precipitation chances including convective prognosis for tonight through Sunday night The northern trough mentioned in the Synopsis section will deepen with its southeast progression towards the Badger State. This movement is going to bring a cold front or essentially cool front for Kansas through on Sunday. As previously discussed in the last issuance of the discussion, the cold front will move into an area of instability that could generate a few strong to borderline severe thunderstorms.
328 PM EDT Sat Aug 26 2017 Canadian high pressure will build across New England tonight and Sunday. Low pressure passes south and east of the area during the midweek period.
Weak low pressure trough still expected to move east across the area by tonight. As the trough/cool front moves southeast tonight expect that the scattered areas of thunderstorms will continue but weaken overnight toward morning. Highs today will again reach the 70s to lower 80s with lows tonight a bit warmer south in the mid 60s due in part to cloud cover and storm potential as well as southwest winds south of the boundary. Northern areas will brush with 60 with cooler air beginning to filter in from the northwest.
Mid level ridging, dry air aloft, and limited instability due to clouds will suppress convection today.
The main focus for today will be on a weak area of low pressure across the Florida peninsula.
and Sunday High pressure will continue to slowly retreat to the east, with strengthening return flow bringing a moist air mass into the forecast area. High temperatures should be in the lower to middle 60s northwest to the upper 60s and lower 70s southeast. In addition, a LLJ is forecast to increase to 30 to 40 kts, helping to push a H8 warm front into the forecast area. On Sunday, an upper level low will drift south into northwest WI during the day. At the surface, low pressure and an associated cold front will push into north central and central WI.
230 PM PDT Sun Aug 26 2017 A very hot weather pattern is expected across the Mojave Desert Region much of the coming week as high pressure strengthens and holds over southern Nevada. Limited moisture trapped underneath the area of high pressure will lead to a slight chance of showers or thunderstorms over the mountains of southern Nevada and northwest Arizona each afternoon.
141 PM EDT Sat Aug 26 2017 High pressure centered over southeastern Canada will bring fair weather and a cool northerly flow through the weekend.
This high encompassed most of the Ern USA/Canada. Temps will be a couple degs warmer than yesterday. A little cooler. Dry and quiet wx in NNW or NW flow as a ridge dominates over the Wrn USA with a trof in the E. Slightly cooler than normal temps Mon-Tue. an upper level disturbance riding over the ridge may actually result in more widespread TSRA activity.
Strong upper level ridge will dominate our weather the next couple days.
Low temperatures tonight and Sunday night will be warmer, primarily in the 50's and low 60's. No sensible weather concerns into today and tonight as low level ridging over the Great Lakes/Ontario begins to shift off to the east. Otherwise, temperatures will likely be a couple degrees warmer as low level winds veer more southeasterly and heights increase aloft.
230 PM PDT Sat Aug 26 2017 A very hot weather pattern is expected across the Mojave Desert Region much of the coming week as high pressure strengthens and holds over southern Nevada. Limited moisture trapped underneath the area of high pressure will lead to a slight chance of showers or thunderstorms over the mountains of southern Nevada and northwest Arizona each afternoon.
250 PM MDT Sat Aug 26 2017 Area will be under northwest flow aloft today with subtle height rises as western ridge nudges across the Rockies. At the surface, lee trough will sharpen up in northeast Colorado, which is where convective allowing models initiate thunderstorms by 21z. Sunday will see the ridge continue to build aloft. At the surface, a cold front will sag into the are during the afternoon.
324 PM EDT Sat Aug 26 2017 High pressure over Ontario will move eastward to the New England States on Sunday.
Weak high pressure, centered over the Great Lakes and stretching into the area, should keep widespread showers from developing elsewhere. Low pressure developing to the south will keep enough of a pressure gradient over the state to keep a nice breeze in place through each day. Temperatures should be near normal Saturday, with a degree or two cooler on Sunday.
209 PM EDT Sat Aug 26 2017 The forecast area will be between a frontal boundary off the southeast coast and high pressure ridging southward along the Appalachians through Sunday. An area of low pressure will develop along the front and lift northeastward.
Look for highs today mainly in the lower and mid 80s, with some upper 80s in parts of southeast NE. As low pressure tracks east across MN and WI through Sunday, a cold front will sag southeast through the region. Will have to keep at least some 20-40 percent thunderstorm chances in the area, but severe potential looks on the low side. The pattern should turn mainly dry by Sunday night, and continue through mid week as high pressure at the surface builds in and takes control. The 500 mb pattern at the start of this period suggest that the remnants of Harvey will linger near the TX coast, a ridge will be centered over UT and we will be in modest northwest flow.
/issued 1050 AM EDT Sat Aug 26 2017/ The area of low pressure remains in place across the Tampa Bay area with numerous showers and a few embedded thunderstorms across the southern half of the area. This low is expected to lift to the NE across the state and into the Atlantic over the next day or so, before finally lifting out of the region and allowing high pressure to build in. An area of low pressure remains in place across the Tampa Bay area this morning.
The trailing cold front associated with this system stretched from central IA into central NE. It is hard to gage the coverage and strength of this complex especially since the low level jet is forecasted to be relatively weak. The upper trough responsible for the cold front will slide east into the Great Lakes through Weds which will allow for high pressure to keep the area dry and mild for late Aug with below avg Temps into mid week. Meanwhile, the ECMWF keeps the western ridge hts so strong that the system drifts northwest toward the TX panhandle by late week. A cold front will move through the area tomorrow morning and early afternoon.
High pressure will continue to reign supreme today, resulting in dry conditions with refreshing late August temperatures. Surface ridging nudging east across Hudson Bay to the eastern Great Lakes will allow for a minor uptick in H85 temperatures, but neutral height fields in a northwesterly flow regime aloft will keep the heating suppressed with highs topping out in the mid 70s to near 80 degrees. Valleys will cool into the mid 50s with ridges holding in the mid 50s to near 60 degrees. This will result in increasing dewpoint temperatures as the previous subsidence inversion begins to weaken/lift as surface ridging slides toward Maine.
154 PM EDT Sat Aug 26 2017 Aviation/Hydro A weak area of low pressure will gradually track into the Great Lakes region over the next few days.
113 PM EDT Sat Aug 26 2017 High pressure will remain in place through the TAF cycle. High pressure will bring a sunny, mild and tranquil day today with highs in the lower to middle 70s (still some 5 degrees below late August averages).