Aikyam-Lab/Synoptic-Bench huggingface dataset:
252 AM EDT Mon Apr 9 2018 Chances for light snow and rain return late tonight through Monday night as a weak low pressure system moves through the region. Will defer to eve shift to monitor trends further to see if additional timing/pop changes are needed in this low confidence setup. Slowly increasing heights will start the process of allowing warmer air into the area. Dry conditions will prevail until mid week when low pressure will track across the northern Great Lakes, bring a brief shot of warm air advection precip (mainly rain) to the area.
Cold front was moving s and w HOB-MAF and with winds expected to be weakening as it pass thru INK around 06Z and FST 08Z.
357 AM CDT Mon Apr 9 2018 (Today and Tonight) Another cold front will move across West Central Texas today. This front will bring cooler temperatures, and highs this afternoon will be closer to seasonal normals. Lows tonight will range from the lower to upper 40s.
Some very light rain will persist this morning close to the Kansas/Oklahoma border, with modest increase in north winds later this morning with passage of a weak cold front. A few scattered showers will be possible across northeast Oklahoma along/behind cold front that will move through today.
/Issued 250 PM EDT Sun Apr 8 2018/ High pressure is in control to start the short term. We anticipate cloud cover to scatter out a bit more by late afternoon into the evening as dry air tries to mix into the lowest levels. However, the next wave of low pressure riding a residual boundary to the south is expected to develop this evening and move off the Carolina coast. Another wave of low pressure is expected to move across the boundary Monday night into early Tuesday.
High pressure will produce mild and dry weather on Monday, but rainy and breezy conditions will return Tuesday.
SHORT TERM (Now through Tuesday): Moisture will continue to expand northward today ahead of the next cold front. Moisture forcing at the surface overnight, along with the axis of the H5 trough aloft passing to the north will continue to bring a threat for showers, and may have enough strength for a clap of thunder overnight. The cold front will bring another shot of cooler temperatures into the region Tuesday, with highs struggling to reach the mid 70s through the day.
The front will slowly sink toward the coast through tonight as the upper level pattern becomes more cyclonic ahead of an approaching trough axis.
536 AM EDT Mon Apr 9 2018 Light precipitation chances return today with a trough of low pressure.
Upper level ridge will build over the region today.
As one system is exiting this morning, another weak disturbance and surface cold front will push through the region today. Another chilly night is expected tonight, as skies clear out from the west and winds diminish as high pressure builds into the region.
Otherwise, winds will become northeast at 5 to 10 knots by morning as a cold front drops south across the region. However, a cold front is approaching the area, and will bring MVFR to potentially IFR ceilings into the area later tonight, as well as east/northeast winds. With the cold front through the area, low clouds will likely persist through most of the morning, and part of the afternoon for eastern sites. For tonight, a shallow cold front will south across much of the area by Monday morning. However, temperatures will a little warmer due to an increase in boundary layer moisture. A quiet weather pattern is in store for Monday with cooler temperatures.
A few scattered showers will be possible across northeast Oklahoma along/behind cold front that will move through today.
Most areas will remain above freezing tonight. though a few isolated spots across the NRN/NWRN counties may again dip to near or just below freezing. This will be a dry cold front.
311 AM CDT Mon Apr 9 2018 Satl imagery this morning revealing an upper ridge situated along the west coast with a broad trof over the cntrl/ern CONUS. Dry conditions and a warming trend is still on tap the next severals days in part to aforementioned wrn CONUS upper ridge building in.
/issued 333 AM CDT Tue Jun 27 2017/ Model consensus is strong for the next trough currently entering the Pacific Northwest to gradually break down the ridge that will begin our return to more seasonable heat beginning this afternoon.
As the cold front moves into the western CWA and towards the Missouri valley between 00 and 03Z, it will be the focus for surface based convection, with the core of 700mb warm air moving off to the east.
A trough axis objectively analyzed through S NV/NW AZ has allowed H5 heights to be depressed by 3-4dm throughout the entire SW Conus per 12Z sounding data. However, the same data shows thermal profiles through the H8-H7 layer have changed very little in the past 24 hours with weak CAA lagging the trough into central CA/NV.
1007 AM EDT Tue Jun 27 2017 A weak cold front will cross the area later today into tonight.
1005 AM EDT Tue Jun 27 2017 An upper disturbance will bring a few showers later today, followed by drier and slightly cooler air through mid week. Unseasonably dry and cool conditions will draw few complaints as the muggy feel remains absent from the sensible weather regime, as continental high pressure born from the upper US plains sinks SE into the Carolina skies.
Considering the weakening Delta Breeze, today will be a little warmer, especially in the Delta influenced areas. Hourly updated LAV guidance running just slightly cooler than our forecast maxes today, but probably not worth an update as the temps are expected to be within a couple of degrees or so of the forecast highs, unlike yesterday which trended several degrees cooler than forecast. Yesterday's short wave trof is nor over ID and moving farther away allowing flat ridging to build in its wake. However, a weak trof will move into the Pac NW today with a weak short wave moving across Norcal early this evening. JHM Warming returns Wed-Fri as ridging over the eastern Pacific moves onto the West Coast.
944 AM PDT Tue Jun 27 2017 High pressure aloft over the region will weaken over the next several days as an upper-level trough over the Pacific Northwest brushes the area.
High pressure at the surface will maintain easterly flow across the region through the remainder of today. This will result in continued quiet and slightly drier conditions across the CWA as dew points generally sit in the low to mid 60s. Temperatures will be a little warmer today than yesterday and reach into the mid to upper 80s.
Considering the weakening Delta Breeze, today will be a little warmer, especially in the Delta influenced areas. Hourly updated LAV guidance running just slightly cooler than our forecast maxes today, but probably not worth an update as the temps are expected to be within a couple of degrees or so of the forecast highs, unlike yesterday which trended several degrees cooler than forecast. Yesterday's short wave trof is now over ID and moving farther away allowing flat ridging to build in its wake. However, a weak trof will move into the Pac NW today with a weak short wave moving across Norcal early this evening. JHM Warming returns Wed-Fri as ridging over the eastern Pacific moves onto the West Coast.
1041 AM CDT Tue Jun 27 2017 Much cooler weather still expected today across the CWA as high pressure continues to move southeast. Surface map of the country dominated by high pressure from the Plains to the Atlantic coast. As the ridge shifts eastward into the Midwest, mild weather will continue for today, albeit with a warming trend. High pressure moving into Central IL will put the region under the axis of the ridge. As the ridge slides slowly eastward.
927 AM EDT Tue Jun 27 2017 A trough of low pressure will remain to our west through mid week. Weather disturbances moving out of the trough will cross the area this afternoon and again on Wednesday.
100 PM EDT Tue Jun 27 2017 High pressure will build over the Upper Midwest today and move into the Ohio Valley tonight.
Chattanooga Airport, TN 83 61 87 67 / 20 0 0 10 Knoxville McGhee Tyson Airport, TN 79 57 84 65 / 10 0 0 0 Oak Ridge, TN 81 56 85 64 / 10 0 0 0 Tri Cities Airport, TN 78 51 81 60 / 10 0 0 0.
1023 AM EDT Tue Jun 27 2017 A cold front crosses this morning. High pressure crosses tonight. Warmer, more humid and unsettled latter half of the week.
926 AM EDT Tue Jun 27 2017 The synoptic pattern aloft this more features ridging across the southwest, a large longwave trough over much of the eastern half of the country, and another ridge south of Florida. At the surface, a frontal boundary remains draped across the northern Florida peninsula while the Atlantic ridge axis stretches across the southern peninsula.
Coastal trough that remains rather stationary along the southern Texas coast should keep convergence and bulk of rain activity along the coast and offshore.
Precipitation chances should begin to diminish considerably after tonight as the subtropical ridge begins building in over the region from the west, likely confining any showers and thunderstorms to areas east of Interstate 35. Upper air analysis last evening showed a trough from the Great Lakes to east Texas with west to west-northwesterly flow over us. The subtropical ridge will begin to build back over Texas from the west.
Dry northwesterly flow across the region persists with broad upper level high pressure over the eastern Pacific. A ridge moves across the Pacific Northwest later this week, for slightly warmer temperatures and less morning clouds across the region.
1012 AM EDT Tue Jun 27 2017 A weak cold front will cross the area later today into tonight.
606 AM CDT Tue Jun 27 2017 Surface map of the country dominated by high pressure from the Plains to the Atlantic coast. As the ridge shifts eastward into the Midwest, mild weather will continue for today, albeit with a warming trend. High pressure moving into Central IL will put the region under the axis of the ridge. As the ridge slides slowly eastward.
1225 PM EDT Tue Jun 27 2017 High pressure will build across the area today resulting in fair weather. As the high pressure system moves east Wednesday, southerly winds will develop over our area leading to warmer and more humid conditions.
943 AM EDT Tue Jun 27 2017 High pressure will build over the Upper Midwest today and move into the Ohio Valley tonight.
847 AM EDT Tue Jun 27 2017 Upper low pressure will maintain cool temperatures and the possibility for an isolated shower or two north of interstate 80 today.
644 AM CDT Tue Jun 27 2017 High pressure centered over Iowa will drift southeast into the Ohio Valley today and continue east over the central Appalachian Mountains tonight. Wind will turn to the southeast today and then the south tonight as the high moves east and a surface trof develops over the Great Plains. The aforementioned trof over the Great Plains will gather strength overnight and southerly flow will continue to increase over the region. These high clouds combined with the southerly flow will limit radiation tonight resulting in warmer lows in the 60s across the majority of the area.
1226 PM EDT Tue Jun 27 2017 A weak cold front will cross the region today. High pressure will dominate for midweek. The high will move off the east coast setting up a warmer and more humid airflow for the end of the week.
808 AM EDT Tue Jun 27 2017 A weak cold front will cross the region today. High pressure will dominate for midweek. The high will move off the east coast setting up a warmer and more humid airflow for the end of the week.
This signals the switch in the overall pattern from a strong ridge and thermal trough which brought us record or near record temperatures over the weekend to a more typical end of June pattern. Beyond tomorrow, the forecast calls for drier weather and normal temperatures across the board as our next ridge builds into place. Although this could allow for the next thermal trough to build, models are showing relatively stable 850 millibar temperatures and have kept the forecast quite similar to the previous forecast with only slight changes with a slight favoring toward the GFS here and there. North winds will increase and seas will steepen today through Wednesday evening as high pressure rebuilds offshore and the thermal trough deepens over California.
1206 PM EDT Tue Jun 27 2017 Upper low pressure will maintain cool temperatures and the possibility for an isolated shower or two north of interstate 80 today.
1149 AM CDT Tue Jun 27 2017 High pressure centered over Iowa will drift southeast into the Ohio Valley today and continue east over the central Appalachian Mountains tonight. Wind will turn to the southeast today and then the south tonight as the high moves east and a surface trof develops over the Great Plains. The aforementioned trof over the Great Plains will gather strength overnight and southerly flow will continue to increase over the region. These high clouds combined with the southerly flow will limit radiation tonight resulting in warmer lows in the 60s across the majority of the area.
1012 AM EDT Tue Jun 27 2017 A sharp upper level trough will move across the region late today.
947 AM EDT Tue Jun 27 2017 A strong cold front will push across the area today reinforcing the unseasonably cool air across the forecast area.
/issued 221 PM CDT Sat Jul 22 2017/ Slightly lower temperatures today compared to 24 hours ago and this has been the trend over the last 48 hours across our entire CWA as moisture continues to slowly increase from the south and a weakening ridge aloft to our north. This scattered coverage to our south due in part to a remnant retrograding upper level trough across the S LA Coast this aftn.
The upper low over the western Gulf will meander near the coast tonight into Sunday and some showers along the immediate coast will be possible toward sunrise Sunday morning. While temperatures have been a touch lower than yesterday, the higher dewpoints are keeping heat index values elevated (100-106F) so far today. With the upper low lingering around the coast between GLS and LCH through tomorrow am a bit hesitant to lower POPS too much. As this low washes out, we should see the upper ridge out west begin building east into the Central/Southern Plains.
Otherwise, partly cloudy skies and lows in the low to mid 70s are expected. Otherwise, should be mostly clear well inland with temperatures inland in the low to mid 70s overnight.
/issued 348 PM CDT Sat Jul 22 2017/ An upper level low is depicted on water vapor and upper air analysis across the southern Louisiana coast and adjacent Gulf waters.
Not sure if this AC/cirrus canopy will fully dissipate tonight, especially as additional convection is ongoing across SE AR/Wcntrl MS, which will spread W into these areas this evening/overnight N of the broad upper low noted just off the LA coast.
Otherwise, high pressure across Quebec will bring light north winds and dry conditions overnight and through the daylight hours on Sunday.
Chattanooga Airport, TN 76 93 74 88 / 10 30 50 50 Knoxville McGhee Tyson Airport, TN 74 92 72 87 / 10 50 60 30 Oak Ridge, TN 75 93 73 88 / 10 50 60 40 Tri Cities Airport, TN 70 90 70 87 / 40 60 60 30.
505 PM MDT Sat Jul 22 2017 Latest upper analysis shows an upper low center over Winnipeg swinging a weakly defined upper trough across the forecast area. The upper ridge will continue to build and broaden, leading to dry and warm weather tonight and on Sunday.
However, one fly in the ointment is a weak cold front that will sag southward from the Ohio Valley, with scattered to numerous showers and thunderstorms expected to develop ahead of the boundary by late afternoon into the evening.
A weak upper trough will bring clouds and cooler weather on Sunday.
Issue is cloud cover as patches of stratocu dropping south west of the upper low. Upper level low slowly sliding south across southern Manitoba. A secondary cold front will drop south this evening and overnight with winds becoming northerly. As a result high temperatures tomorrow will be cooler with 70s for much of the area as we remain in the northerly SFC flow ahead of high pressure across the western Dakotas.
820 PM EDT Sat Jul 22 2017 Broad area of low pressure will move through the Central Great Lakes through Sunday. A cold front will move south across the area late Sunday ahead of a trough deepening aloft. High pressure will build southeast out of Canada across the Great Lakes during the first half of the week. Scattered showers and thunderstorms expected to re-develop on Sunday with diurnal heating ahead of a trough dropping down from the north.
A ridge of high pressure aloft will be over the Great Basin with a weak northwesterly flow aloft over the cwa. On Sunday, upper ridge with weak north/northwesterly flow aloft over the area. Less cloud cover will lead to warmer temperatures and will adjust them up by a degree or two. Best chance of showers and thunderstorms will be late in the day and located in or near the higher terrain, too stable for storms over the northeast plains. The upper ridge axis will shift a bit eastward and flatten a bit Sunday evening.
scattered clouds around 35 hundred feet ahead of a trough of low pressure. Patchy fog is possible at times this weekend while the higher dewpoints stick around. The Lake breeze should weaken shortly with southwest winds ahead of a weak trough. Should be enough sunshine Sunday to push highs into the low 80s most places.
GOES-16 water vapor imagery shows the upper level low centered directly over the region and it will continue to progress westward during the overnight hours. The 00Z LCH sounding sampled a PWAT near 2 inches so showers and thunderstorms will be possible during the overnight hours as the upper level low progresses westward. /issued 348 PM CDT Sat Jul 22 2017/ An upper level low is depicted on water vapor and upper air analysis across the southern Louisiana coast and adjacent Gulf waters.
In the low to mid levels of the atmosphere, an Atlantic ridge of high pressure will extend across South Florida overnight. In the upper levels of the atmosphere, an area of low pressure will be located north of the Bahamas tonight.
845 PM EDT Sat Jul 22 2017 High pressure remains off the southeast coast. An upper level trough of low pressure will move over the northeastern US early in the week. On the other hand, around or in excess of 1000 J/kg present across the Highlands southeast towards Charlottesville. Ultimately, the low temp will be whatever we have after round 3. temperatures may be a degree or two cooler than today.
Mid level troughing forecast over the region through Sunday morning combined with high moisture (PWATs 2 inches), llvl moisture convergence from southwest flow, and vorticity advection will lead to continued low chances of showers or a very isolated tstms overnight.
Broad upper ridge over the Intermountain region with dry westerly flow aloft.
Temp decreases will be modest tonight, with most locations in the low to mid 70s by daybreak Sunday.
Temperatures will begin to moderate on Sunday as a weak upper level trough begins to develop off our coast. But then by the latter part of the week, high pressure looks to build back in again resulting in a return to warming temperatures. Warming occurred at nearly all locations throughout our forecast area today as high pressure aloft strengthened over California. A cooling trend will get underway on Sunday for much of our forecast area, as high pressure aloft begins to retreat to the east and a weak upper low develops off the northern California coast.
823 PM MDT Sat Jul 22 2017 Most of the late afternoon convection that developed over the high plains has dissipated. Cumulus and some storms are developing in the convergence along this trough. Heights aloft rise on Sunday with the midlvl ridge axis located near the Laramie Range by the aftn. After slightly cooler temps today, we will see around 5 degrees of warming at most locations.
Lows tonight may be slightly cooler across far northeast OK as outflow from storm complex in Kansas may push far enough south.
1001 PM EDT Sat Jul 22 2017 Broad area of low pressure will move through the Central Great Lakes through Sunday. A cold front will move south across the area late Sunday ahead of a trough deepening aloft. High pressure will build southeast out of Canada across the Great Lakes during the first half of the week. Scattered showers and thunderstorms expected to re-develop on Sunday with diurnal heating ahead of a trough dropping down from the north.
Stacked high pressure remains in place over the area. Lows will be in the low 60s, mid 60s along the immediate coastline.
These should fade out this evening, then dry conditions will prevail as high pressure builds in overhead. Then with clear skies and strong high pressure, Friday is set up to be the warmest day of the season so far. Though unusual for this time of year patchy valley fog may lower conditions to MVFR early Friday morning as a ridge builds into the area.
Expect temperatures to warm even more the next few days as high pressure aloft builds over the region.
751 PM EDT Thu Apr 20 2017 Low pressure will track across southern lower Michigan and eastward to Ontario tonight, taking a cold front across northern Ohio and northwest PA this evening through early overnight.
539 PM MDT Thu Apr 20 2017 Current surface analysis shows an area of low pressure over the Great Lakes region with high pressure centered over eastern Wyoming and the western Dakotas. Upper level analysis has a ridge over the northern plains with a trough extending down the west side of the Rockies.
539 PM MDT Thu Apr 20 2017 Clouds increasing over the CWA this afternoon with showers also increasing gradually over and near the higher mtns. This system will continue to drop southeast overnight and close off an upper low over Colorado during the day Friday. Much cooler over much of the CWA Friday given clouds and pcpn with chilly conditions Friday night.
906 PM EDT Thu Apr 20 2017 An approaching cold front will bring showers and thunderstorms overnight. Cooler temperatures and scattered showers for the weekend. Even with rain moving through many locations today, temperatures in eastern Ohio have rebounded into the lower 80s with dewpoints in the 50s, which would help to provide necessary instability for thunderstorms.
Currently, WV and Vis sat imagery shows a mid-latitude cyclone moving into the Great Lakes region with associated cold front trailing to the southwest through the Ozarks into OK and the Southern Plains region. Northwest to zonal flow resides over the Central Plains with another Pacific trough over the Pac Northwest into the Northern Rockies region. Rest of today will remain dry and cooler with weak low level CAA still working through the region. Highs should remain on the cooler side with cloud cover overspreading the area in advance of the previously mentioned North Pac trough diving south into the Southern Rockies before deepening as it pulls back into the southern Central Plains. The 850 mb frontal boundary sets up across southern Kansas with the highest qpf expected near and south of east central Kansas.
GAH PREVIOUS SHORT TERM DISCUSSION: Short-term period tonight and Friday - The upper flow pattern this evening places the axis of a medium wave ridge over Northeast Montana. Tonight the trough splits further with the southern and more energetic portion under-cutting through Utah and Colorado. The northern portion of the wave sets up a weak cold front just east of the Divide by morning.
VFR conditions will then prevail through Friday afternoon as high pressure remains in control. An H5 ridge resides across North Central Mexico, with a lobe extending over much of Texas. High pressure lies over the Gulf. Weak, transient low pressure over the Southern High Plains is contributing slightly to the synoptic scale pressure field. High pressure will displace Plains lower pressure Friday night as a front pushes into Texas. Another round of low clouds will develop Friday night, with light winds and low temperatures nudging into the lower 70s.
Cold front currently located from central IL southwestward across central MO.
High pressure building off the coast will bring a warming and drying trend to the Bay Area and Monterey Bay region through Friday. Upper level ridge off the west coast will move over the west coast on Friday.