Aikyam-Lab/Synoptic-Bench huggingface dataset:
524 AM EST Sat Dec 11 2021 Cold front still well to the west, roughly from Chicago to Little Rock, and some isolated weak convection has been moving across southern Illinois just ahead of it. The severe threat will continue this morning ahead of a strong cold front coming in from the west. The cold front will cross the region over the course of the morning and will exit southern Indiana and central Kentucky by lunch time, ending the storm threat. Tonight should be clear with light winds as high pressure builds from Texas to Kentucky. The upper pattern becomes more zonal into mid-week as a ridge develops over the Gulf of Mexico (a bit father south than what was advertised earlier this week).
203 AM MST Sat Dec 11 2021 Upper ridge moves into the area today. This will bring warmer temperatures which will allow some of the snow to melt. Flow aloft turns to the SW on Sunday as ridge moves to the east and an upper trough moves south from the Gulf of Alaska.
(Today and tonight) At this hour, a cold front has pushed through west central Texas and into the Hill Country. Behind the front, cool high pressure was starting to spill into the region. Northerly winds will continue to gust over 20 mph through early afternoon until the center of the high approaches and relaxes the pressure gradient. The cool airmass in place will keep high temperatures in the low to mid 50s across the area, despite plenty of sunshine. Overnight, the area of high pressure will push eastward, which will allow very light southerly flow to occur. However, the winds should remain light enough that temperatures will cool down into the low to mid 30s under clear skies.
546 AM CST Sat Dec 11 2021 (Today and tonight) At this hour, a cold front has pushed through west central Texas and into the Hill Country. Behind the front, cool high pressure was starting to spill into the region. Northerly winds will continue to gust over 20 mph through early afternoon until the center of the high approaches and relaxes the pressure gradient. The cool airmass in place will keep high temperatures in the low to mid 50s across the area, despite plenty of sunshine. Overnight, the area of high pressure will push eastward, which will allow very light southerly flow to occur. However, the winds should remain light enough that temperatures will cool down into the low to mid 30s under clear skies.
Temperatures will remain fairly cool this afternoon due to the cooler air advected into the region from the aforementioned front.
Chattanooga Airport, TN 69 33 52 33 59 / 100 0 0 0 0 Knoxville McGhee Tyson Airport, TN 71 32 50 31 57 / 100 0 0 0 0 Oak Ridge, TN 70 30 50 31 56 / 100 0 0 0 0 Tri Cities Airport, TN 70 29 47 28 56 / 100 10 0 0 0 TN.
917 AM EST Sat Dec 11 2021 Showers and thunderstorms will continue this morning ahead of a cold front moving through the Ohio Valley. A drier and cooler airmass will spread into the region this afternoon into tonight. Have seen a fine line of SHRA, which has remained largely devoid of any lightning, develop along and /just/ ahead of the cold front which is advancing quickly through the NW third of the ILN FA already.
Under the influence of a building ridge, we will continue to see sunny skies and warming temperatures as warm air advection continues. Despite this, our snowpack will keep things a bit cooler at the surface than expected. Tomorrow will be even warmer than today, with high temperatures above freezing area wide, and close to 40 degrees on the ND/SD border.
TFJ Upper ridge moves into the area today. This will bring warmer temperatures which will allow some of the snow to melt. Flow aloft turns to the SW on Sunday as ridge moves to the east and an upper trough moves south from the Gulf of Alaska.
230 PM CST Sat Dec 11 2021 Gusty west winds will diminish this evening as the cold front pushes further east.
A weak leeside trough will be in place across eastern Colorado, extending across far western Kansas on Sunday.
200 PM CST Sat Dec 11 2021 (Issued 200 PM CST Sat Dec 11 2021) Tonight through Sunday night: Strong low pressure northeast of lower Michigan will continue to pull northeast away from the area.
124 PM MST Sat Dec 11 2021 Across the region this morning, skies are clear as high pressure moves eastward off the Rockies, replacing an exiting system that brought light snow/precip to the area.
226 PM CST Sat Dec 11 2021 The latest sfc analysis was indicating occluding but still deep cyclone over the northern GRT LKS, while ridging was shifting eastward acrs the southern plains and toward the lower/mid MS RVR Valley. But if the sfc winds do decouple more than anticipated, there could be some cooler readings especially north of I-80. looking at the fcst soundings, marginal mixing depth produces highs in the mid to upper 40 north of Hwy 30, to the low to mid 50s in the far southern CWA.
Closer to home, mid and upper-level ridging is creating fair and stable weather conditions across the Keys and southern Florida.
234 PM CST Sat Dec 11 2021 High pressure will build in behind the front currently traversing the region. Upper ridging will build across the Gulf of Mexico and extend into the Lower Mississippi Valley through the early to mid week timeframe.
Morning update: Changes include adding a wind advisory for the Moses Lake area, cancelling the Winter Storm Warning for far NE Washington, and removing the lower elevations from the Winter Storm Warning for the valleys in the Idaho Panhandle. Winds are variable over the region due to the terrain, and turbulant nature of the winds with the stronger gusts occasionally mixing down over some areas, especially the higher benches, the mountains, and the Columbia Basin. The south to southwest winds have aided in bringing in warmer air. Little to no additional accumulations are expected for the lower elevations today.
1013 AM CST Sat Dec 11 2021 The cold airmass continues to surge into the area behind the cold front which passed through early this morning.
1231 PM CST Sat Dec 11 2021 Key Points: * Strong gusty northwest winds are expected to decrease throughout the day as deep area of low pressure lifts northeast into Great Lakes Region. Strong northwest winds behind a cold front have lead to a precipitous decrease in temperatures overnight. Clear skies should allow the surface to decouple from atmosphere aloft, allowing temperatures to fall to near freezing Sunday morning despite increasing southwest winds aloft.
211 PM CST Sat Dec 11 2021 All weather associated with the cold frontal passage this morning has exited the mid-state with partly cloudy skies gradually giving way to clear skies overnight.
1026 AM MST Sat Dec 11 2021 Clear skies and cold temps across the region early this morning in the wake of yesterday's trough passage, and many high mountain and interior valley locations have dropped below zero as of 11z. Tonight, lee troughing persists as mid/upper level flow slowly becomes more wly. Moderate gap flow winds again look likely, with more widespread wly downslope flow over lee mountain slopes leading to warmer mins in many locations.
122 PM EST Sat Dec 11 2021 Cold front sweeps across the area with gusty showers and isolated thunderstorms.
1139 AM CST Sat Dec 11 2021 (Today and tonight) At this hour, a cold front has pushed through west central Texas and into the Hill Country. Behind the front, cool high pressure was starting to spill into the region. Northerly winds will continue to gust over 20 mph through early afternoon until the center of the high approaches and relaxes the pressure gradient. The cool airmass in place will keep high temperatures in the low to mid 50s across the area, despite plenty of sunshine. Overnight, the area of high pressure will push eastward, which will allow very light southerly flow to occur. However, the winds should remain light enough that temperatures will cool down into the low to mid 30s under clear skies.
As for the rest of the forecast, moist westerly flow will result in some persistent decent orographic snowfall develop on west facing slopes in the higher Beartooth/Absaroka mountains.
1145 AM EST Sat Dec 11 2021 Showers and thunderstorms will continue this morning ahead of a cold front moving through the Ohio Valley. A drier and cooler airmass will spread into the region this afternoon into tonight. Have seen a fine line of SHRA, which has remained largely devoid of any lightning, develop along and /just/ ahead of the cold front which is advancing quickly through the NW third of the ILN FA already.
Upstream, a strong mid-level trough over the midwest will continue to push eastward, eventually flattening out. High pressure builds into the southeast, but the drier air behind the front will remain confined to our north.
A cold front continues to make steady progess southeastward across the area this afternoon and will likely be completely out of the area by early this evening. Temperatures in the upper 70s to around 80 with dewpoints in the low 70s is creating an unstable airmass, which along with 0-1km SRH of 100-150m^2/s^2, is causing some weak rotation in the showers and storms. The severe threat will end with frontal passage, as a much cooler and drier airmass moves into the area. MVFR to IFR conditions can be expected through this evening as a cold front moves across the area with scattered to numerous showers and thunderstorms.
114 PM MST Sat Dec 11 2021 20z surface analysis had lee trough from central MT into central CO with widespread 2-3mb/3hr pressure falls across the northern plains per lower tropospheric warm air advection. Tight pressure gradient over the area creating gusty southwest winds over parts of northeast WY into the higher Black Hills and a few localized places over southern SD. Water vapour had upper ridge building from the Rockies into the northern Plains. Tonight/Sunday, upper ridge shifts eastward as warm air advection continues. Tight pressure gradient remains in place which will support continued gusty southwest winds over parts of northeast WY into the higher Black Hills.
The severe threat will continue this morning ahead of a strong cold front coming in from the west. The cold front will cross the region over the course of the morning and will exit southern Indiana and central Kentucky by lunch time, ending the storm threat. Tonight should be clear with light winds as high pressure builds from Texas to Kentucky. The upper pattern becomes more zonal into mid-week as a ridge develops over the Gulf of Mexico (a bit father south than what was advertised earlier this week).
Gusty northwest winds will persist through the afternoon, but gradually die off after sunset to light northerly with speeds around 5kts of less as high pressure builds over the area.
1106 AM CST Sat Dec 11 2021 Key Points: * Strong gusty northwest winds are expected to decrease throughout the day as deep area of low pressure lifts northeast into Great Lakes Region. Strong northwest winds behind a cold front have lead to a precipitous decrease in temperatures overnight. Clear skies should allow the surface to decouple from atmosphere aloft, allowing temperatures to fall to near freezing Sunday morning despite increasing southwest winds aloft.
Approaching cold frontal boundary still just north of Florida early this evening. Any fog should lift/dissipate by 9 am, and then the weak cold front will cross through central Florida from north to south beginning in the late morning and continue through the afternoon. More cloud cover north of Orlando should keep highs in the mid-upper 70s, but farther south highs are still expected to reach the low 80s. A weak cold front will move through central Florida late Sun morning and into the afternoon bringing a few showers with it. Southerly winds around 10 kt will veer to the SW/W through the night as a weak cold front approaches the waters.
535 PM CST Sat Dec 11 2021 Gusty west winds will diminish this evening as the cold front pushes further east.
251 PM MST Sat Dec 11 2021 A ridge over Montana today has allowed mild Pacific air to flow into northeast Montana with temps this afternoon ranging from the mid 30s near Plentywood to the mid 40s from Jordan to Winnett. Winds are expected to drop off this evening and be a bit lighter Sunday ahead of a very weak cold front dropping in from the north.
559 PM CST Sat Dec 11 2021 A much quieter afternoon and evening is expected across the area as surface ridging continue to build into the central part of the US. As the ridge finds itself in an odd location, centered over the southern plains the flow into the area is more westerly than northwesterly. A gradual warm up will commence starting on Sunday as surface driving upstream causes winds to respond from the south, which will push some warmer air into the region. Mid level ridging will form in the wake of the departing mid level system, and ahead of the next upstream trough.
/EC/ High pressure will build in behind the front currently traversing the region. Upper ridging will build across the Gulf of Mexico and extend into the Lower Mississippi Valley through the early to mid week timeframe.
However, more exposed areas with higher terrain such as in south central South Dakota as well as the Buffalo Ridge in southwestern Minnesota will see winds of 10 to 15 mph much of the night. There is also flow perpendicular to the Buffalo Ridge and this will produce stronger winds east of the ridge. This will also result in some downsloping and keep temperatures around Marshall in the lower to middle 20s. While temperatures at 925 mb will rise above freezing, the deep snow cover from south central South Dakota into southwestern Minnesota will limit how warm it will get. In the deepest snow cover from Mitchell to Sioux Falls to Windom, it will only rise a couple of degrees above freezing.
231 PM MST Sat Dec 11 2021 Through Tonight: Expect clear skies in assoc/w height rises and synoptic subsidence in the wake of a progressive upper level trough (already well to the east.
Further north, snow continues to accumulate in the high terrain, while valleys have warmed enough to limit the low elevation impact. There is also a short periods of time overnight where freezing rain may mix in the valleys causing isolated additional impacts to northwest Montana.
409 PM MST Sat Dec 11 2021 20z surface analysis had lee trough from central MT into central CO with widespread 2-3mb/3hr pressure falls across the northern plains per lower tropospheric warm air advection. Tight pressure gradient over the area creating gusty southwest winds over parts of northeast WY into the higher Black Hills and a few localized places over southern SD. Water vapour had upper ridge building from the Rockies into the northern Plains. Tonight/Sunday, upper ridge shifts eastward as warm air advection continues. Tight pressure gradient remains in place which will support continued gusty southwest winds over parts of northeast WY into the higher Black Hills.
829 PM CST Sat Dec 11 2021 Gusty west winds will diminish this evening as the cold front pushes further east.
Issued by National Weather Service Kansas City/Pleasant Hill MO 340 PM CST Sat Dec 11 2021 A much quieter afternoon and evening is expected across the area as surface ridging continue to build into the central part of the US. As the ridge finds itself in an odd location, centered over the southern plains the flow into the area is more westerly than northwesterly. A gradual warm up will commence starting on Sunday as surface driving upstream causes winds to respond from the south, which will push some warmer air into the region. Mid level ridging will form in the wake of the departing mid level system, and ahead of the next upstream trough.
Winds remain gusty over the higher elevations with stations gusting to 60 mph this afternoon. fields showing a stable layer at ridgetop extending into the foothills. The HREF ensemble mean wind gusts continue to show potential for gusts to 70 mph through tomorrow morning over the higher mountains. A weak ridge over Colorado will promote dry and warmer conditions Sunday.
213 PM MST Sat Dec 11 2021 Across the region this morning, skies are clear as high pressure moves eastward off the Rockies, replacing an exiting system that brought light snow/precip to the area.
With temperatures falling below freezing in many locations, slushy side roads and parking lots will freeze up. The pressure gradient remains fairly tight overnight as northern Michigan sits in the broad confluence between lower pressure over southern Canada and high pressure over the southeast states, with embedded short wave energy. Current troughing over the Great Lakes will shift offshore of New England by Sunday. Behind this system heights start to rise with broad flat ridging taking control of the Gulf states.
All weather associated with the cold frontal passage this morning has exited the mid-state with partly cloudy skies gradually giving way to clear skies overnight.
724 PM EST Sat Dec 11 2021 Water vapor imagery continues to show the very dry air aloft over the region from the SW Gulf of Mexico upper ridge. The cold front is losing steam as it slowly progresses through the Deep South tonight with a slight chance of showers over the Nature Coast. Upstream, a strong mid-level trough over the midwest will continue to push eastward, eventually flattening out. High pressure builds into the southeast, but the drier air behind the front will remain confined to our north.
337 PM CDT MON APR 13 2015 THE COLD FRONT HAS MOVED THROUGH THE ENTIRE AREA. NEXT ROUND OF PRECIP SHOULD FOCUS ACROSS SE OK/ WC AFTER 06Z TONIGHT AS ADDITIONAL UPPER LEVEL ENERGY ROTATES AROUND THE APPROACHING UPPER LOW.
/ISSUED 1011 AM EDT MON APR 13 2015/ THE 12Z SOUNDING THIS MORNING SHOWED DRIER AND WARMER AIR IN THE 950-850MB LAYER AND IN THE 700-500MB LAYER DUE TO RIDGING BUILDING INTO THE REGION. /ISSUED 339 AM EDT MON APR 13 2015/ WEAK LOW PRESSURE OVER TEXAS WILL MOVE EAST/NORTHEAST INTO THE TENNESSEE VALLEY THROUGH TUESDAY, AS HIGH PRESSURE OVER THE WESTERN ATLANTIC WATERS BUILDS WESTWARD INTO SOUTH FLORIDA.
408 AM EST SAT MAR 7 2015 HIGH PRESSURE WILL CONTINUE TO DRIFT SOUTH TO THE SOUTHEASTERN STATES TODAY.
/ISSUED 311 PM CST Fri Mar 6 2015/ (Tonight and Tomorrow) Upper low centered over the northern Baja Peninsula early this afternoon will move east over southern Arizona by tomorrow afternoon. Pseudo-zonal flow aloft over the forecast area this afternoon will begin backing to the southwest overnight and through the day tomorrow as the upper low tracks to the east. Morning low temperatures will be much warmer than this mornings with lower 30s expected.
328 AM EST SAT MAR 7 2015 QUIET WEATHER FOR THE SHORT TERM AS HIGH PRESSURE PERSISTS ACROSS THE SOUTHEAST.
928 PM MST FRI MAR 6 2015 EARLY AFTERNOON WATER VAPOR LOOP DEPICTED A BROAD UPPER TROUGH FROM THE FRONT RANGE EAST THROUGH THE MS VALLEY AND EASTERN CONUS. A STATIONARY UPPER RIDGE EXTENDED FROM CA INTO THE GULF OF AK. SOME PACIFIC MOISTURE ALOFT WAS TOPPING THE RIDGE AND STREAMING SOUTHEAST ACROSS THE REGION. LATEST MODEL GUIDANCE IS IN GOOD AGREEMENT KEEPING THE UPPER RIDGE PARKED NEAR THE WEST COAST THROUGH THE WEEKEND. HIGHS SUNDAY WILL BE AROUND 5 DEGREES COOLER WITH 700MB TEMPERATURES AROUND -6C.
MODELS YIELD WEAK UPPER LOW OVER OKLAHOMA AND NORTHERN TEXAS MUCH OF THE WEEK.
SATELLITE IMAGERY SHOWS CLEAR SKIES WEST OF THE HIGHWAY 281/INTERSTATE 69C CORRIDOR AND OVERCAST SKIES TO THE EAST OF THIS LINE OF DEMARCATION.
1245 AM EST SAT MAR 7 2015 HIGH PRESSURE IN CONTROL FOR TONIGHTS WEATHER WITH DIMINISHED WINDS INTO THE OVERNIGHT PERIOD AND A HARD FREEZE ON TAP FOR PORTIONS OF NORTH GEORGIA. THIS WILL ALLOW LOWS TONIGHT TO DIP INTO THE LOWER 20S NORTH AND WEST. THESE FREEZING TEMPERATURES COULD RESULT IN A FEW PATCHES OF BLACK ICE ON AREA ROADS AND BRIDGES TONIGHT WHERE ANY RESIDUAL MOISTURE MAY LINGER. SATURDAY MORNING TEMPERATURES ACROSS CENTRAL GEORGIA SHOULD WARM ABOVE FREEZING BETWEEN 8-9 AM. BELOW NORMAL LOWS LOOK REASONABLE ONCE AGAIN SATURDAY NIGHT AS HIGH PRESSURE SETTLES OVER THE STATE.
Seeing a wide range of temperatures across the area, with the coolest spots dipping solidly into the single digits, while most other spots are in the teens and the low 20s. Will see a much milder night with lows dropping to around or just below freezing.
1145 PM CST FRI MAR 6 2015 FOR 06Z TAFS /ISSUED 908 PM CST FRI MAR 6 2015/ ANOTHER COLD NIGHT IS IN STORE FOR THE TENNESSEE VALLEY TONIGHT WITH TEMPERATURES DROPPING INTO THE LOW TO MID 20S. LIGHT WINDS AND SOME LINGERING SLEET/ICE WE COULD POSSIBLY DROP A FEW MORE DEGREES AND TIE THE LOW.
200 AM PST SAT MAR 7 2015 HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING WELL ABOVE NORMAL TEMPERATURES TODAY. LOW PRESSURE WILL MOVE ACROSS THE WEST COAST. BRINGING COOLER TEMPERATURES AND SOME POSSIBLE LIGHT RAIN NORTH OF SANTA BARBARA. OFFSHORE FLOW WILL RETURN AND RESULT IN DRY AND WARMER CONDITIONS. RIDGE WILL REMAIN PARKED JUST OFF THE WEST COAST WHILE LOW.
HIGHS LOOK TO BE SEVERAL DEGREES WARMER THAN THOSE FORECAST FOR TODAY.
BASED ON THE PERSISTENT THERMAL TROUGH OVER THE REGION OF SNOW-COVERED GROUND.
MEANWHILE, A CLOSED OFF UPPER LEVEL LOW ACROSS BAJA CALIFORNIA WILL BEGIN TO PUSH SLOWLY EASTWARD ACROSS THE DESERT SOUTHWEST. COMBINED WITH PLENTY OF SUNSHINE TODAY, LOOK FOR HIGHS GENERALLY UP INTO THE LOWER AND MID 60S(F) WITH A FEW UPPER 50S(F) STILL POSSIBLE ACROSS WEST CENTRAL KANSAS WHERE THE AIR MASS WILL BE A BIT COOLER. THIS GUIDANCE IS STILL SEVERAL DEGREES COOLER THAN THE MEX.
WHERE TEMPERATURES WILL STRUGGLE TO RISE ABOVE FREEZING. AND COUPLED WITH THE LOWER LEVELS MOISTENING DUE TO THE MELTING SNOW.
455 AM EST SAT MAR 7 2015 A COLD FRONT WILL APPROACH TODAY THEN CROSS THE REGION TONIGHT. WEAK LOW PRESSURE WILL MOVE EAST ACROSS THE REGION SUNDAY.
Also lowered Havre's low several degrees as they were running cooler than forecast as of 9 pm and there is the possibility of partly cloudy skies the rest of tonight. VFR conditions will prevail for the next 24 hours as high pressure remains anchored along the US West coast. An upper level high pressure ridge will remain over the West Coast through Sunday although several disturbances will pass through the area. At the surface, a cold frontal boundary will cross the Canadian border in the morning and move into the southwest zones by late afternoon.
320 AM EST SAT MAR 7 2015 COLD HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE REGION TODAY.
359 AM EST SAT MAR 7 2015 HIGH PRESSURE WILL CONTINUE TO DRIFT SOUTH TO THE SOUTHEASTERN STATES TODAY.
WITH THE LOW DEWPOINTS IN PLACE. TEMPERATURES ARE ALL OVER THE PLACE FROM AROUND 30 TO THE LOWER 50S. HOWEVER SOME WESTERLY COMPONENT SHOULD HOLD LOWS AT OR ABOVE FREEZING MUCH OF THE CWA. MODEL SOUNDINGS KEEP NOSE OF WARM AIR OFF THE SURFACE AND SURFACE TEMPS CLOSE TO FREEZING SUNDAY MORNING. THUS RAIN OR FREEZING RAIN WILL BE POSSIBLE. ANY PRECIP SHOULD BE MOVING AWAY RELATIVELY QUICKLY SUNDAY MORNING WITH WEAK NORTH WINDS TO FOLLOW AND A BIT COOLER AIR. BUT STILL LOOKING FOR HIGHS JUST ABOVE NORMAL IN THE LOWER 50S.
UPPER LEVEL RIDGING AND NWLY FLOW IS PARKED OVER THE REGION HELPING TO INCREASE TEMPERATURES TO NEAR NORMAL. MOSTLY CLEAR SKIES OVERNIGHT WILL BRING TEMPERATURES BELOW FREEZING OVERNIGHT THEN BACK INTO THE LOWER 50S ON SATURDAY. AND WITH SOME DOWNSLOPING EXPECTED AHEAD OF THE SYSTEMS ASSOCIATED COLD FRONT THAT NIGHT. TEMPERATURES WILL BE SLIGHTLY COOLER COMPARED TO SATURDAY.
1144 PM CST Fri Mar 6 2015 High pressure has shifted to the southeast of the area and southerly winds are treating us kindly today. Only exception is across south central Missouri where deeper snow cover has held temperatures in the lower to middle 40s. Little change in the weather pattern is expected tonight into Saturday as high pressure to our south maintains a low level southwesterly flow. Lows tonight will be warmer than last night, ranging from the upper 20s in south central Missouri to the low/mid 30s elsewhere.