Aikyam-Lab/Synoptic-Bench huggingface dataset:
BUILDING HIGH PRESSURE WILL TEND TO SUPPRESS THUNDERSTORM COVERAGE WHILE BRINGING HOTTER TEMPERATURES TO THE AREA. LARGE SCALE FEATURES REMAIN FAVORABLE FOR ELEVATED THUNDERSTORM COVERAGE AND ORGANIZATION MONDAY WITH THE RIDGE STRENGTHENING IMMEDIATELY DOWNSTREAM IN NEW MEXICO. THEN THE RIDGE IS EXPECTED TO GRADUALLY REORIENT INTO A BLOCKING POSITION LATE IN THE WEEK AS A STRONG LOW DIGS DOWN THE BRITISH COLUMBIA AND PACIFIC NORTHWEST COASTS.
322 PM CDT SUN AUG 23 2015 BREEZY NORTHWEST WINDS ON THE BACK SIDE OF A DEPARTING LOW PRESSURE SYSTEM WILL CONTINUE THROUGH THE LATE AFTERNOON INTO THE EARLY EVENING BEFORE DROPPING OFF SIGNIFICANTLY AROUND OR SHORTLY AFTER SUNSET AS HIGH PRESSURE SETTLES IN OVER THE AREA. THE HIGH WILL THEN BE THE DOMINANT FEATURE OVER THE NORTHERN PLAINS THROUGH THE SHORT TERM PERIOD. HIGH TEMPERATURES ON MONDAY WILL RANGE FROM THE LOWER 70S ACROSS THE EAST TO THE UPPER 70S ACROSS THE WEST.
246 PM CDT SUN AUG 23 2015 Unseasonably cool high pressure for mid/late August will build into the Plains in the short term.
534 PM EDT SUN AUG 23 2015 HIGH PRESSURE RIDGE OVER PENNSYLVANIA WILL SLOWLY WEAKEN AS A COLD FRONT APPROACHES AND THEN MOVES ACROSS THE REGION MONDAY. A RELATIVELY DEEP MID-TROPOSPHERIC TROUGH WILL DOMINATE THE PATTERN OVER PENNSYLVANIA FOR THE REMAINDER OF THE WEEK. MINS WILL RANGE FROM MID TO UPPER 50S NORTH TO THE LOWER 60S SOUTHEAST. MOISTURE POOLS LONGEST OVER MY SOUTHEAST AND THAT IS WHERE POPS REMAIN THE HIGHEST MONDAY AFTERNOON AND EVENING. HIGHS WILL RANGE FROM THE LOWER TO MIDDLE 70S NORTHWEST TO THE MIDDLE 80S SOUTHEAST. THE LARGE UPPER LEVEL LOW CONTINUES TO TAKE SHAPE CURRENT MODEL GUIDANCE SHOWS THE CORRESPONDING FRONT COULD STALL DUE TO LACK OF STRONG FLOW ALOFT. ALL MED RANGE GUIDANCE CONTINUES TO INDICATE MID- LATE WEEK WX WILL BE DOMINATED BY LINGERING UPPER TROUGH OVR THE NORTHEAST CONUS.
The region will mainly be in between a ridge of high pressure over the southwest and a low pressure area that is currently along the coast of Canada.
A COLD FRONT IS FORECAST TO MOVE ACROSS THE REGION FROM NW-SE BEFORE DAYBREAK MON AM.
A COLD FRONT ASSOCIATED WITH THIS SYSTEM WILL SWING THROUGH THE LOWER OHIO VALLEY THIS EVENING INTO THE OVERNIGHT HOURS. THE MAIN QUESTION FOR LATE THIS AFTERNOON INTO THE EVENING HOURS WILL BE WHETHER STORMS WILL DEVELOP JUST AHEAD OF THE COLD FRONT AND HOW STRONG THESE STORMS WILL BE. MUCH DRIER AND COOLER AIR WILL FILTER IN BEHIND THE FRONT. HIGHS TOMORROW WILL BE QUITE A BIT COOLER IN THE UPPER 70S WITH LOWS TOMORROW NIGHT DIPPING INTO THE MID TO UPPER 50S.
1133 AM MDT SUN AUG 23 2015 UPDATED TO ADD AREAS OF SMOKE AND HAZE FOR TODAY TO AREAS ALONG THE LOWER EASTERN SLOPES. BROUGHT IN BY LAST NIGHTS COLD FRONT. COLD FRONT HAS PUSHED A MASS OF RELATIVELY COOL STABLE AIR SOUTH ACROSS THE PLAINS. TEMPERATURES BEHIND THE COLD FRONT WILL BE ABOUT 15-20 DEGREES COOLER OVER THE EAST TODAY WITH COMFORTABLE HIGHS RANGING FROM THE MID 70S TO MID 80S. RANGING FROM JUST A COUPLE DEGREES COOLER IN SOME AREAS UP TO ABOUT 10 DEGREES COOLER IN OTHERS.
345 PM CDT SUN AUG 23 2015 THE COLD FRONT THAT PUSHED SOUTH THROUGH OUR AREA EARLIER TODAY IS CURRENTLY PARKED ALONG THE I20 CORRIDOR WITH ONGOING CONVECTION FROM SNYDER TO ABILENE. ECMWF/SREF QPF SIGNALS ARE HIGHER FOR OUR AREA ON MONDAY THAN THE NAM/GFS DUE TO DIFFERENCES IN THE LOW LEVEL WIND FIELDS RESPONDING TO SURFACE PRESSURE FALLS. TEMPERATURE FORECAST REMAINED RELATIVELY UNCHANGED FROM PREVIOUS WITH A NICE COOL DOWN INTO THE MID-UPPER 80S BEHIND THE COLD FRONT. A LITTLE WARMER OFF THE CAPROCK INTO THE ROLLING PLAINS.
1237 PM CDT SUN AUG 23 2015 06Z SFC DATA HAS THE COLD FRONT FROM ROUGHLY KDEH TO KSTJ WITH PERHAPS A PRE-FRONTAL TROF JUST AHEAD OF IT. DEW POINTS AHEAD OF THE COLD FRONT WERE IN THE 60S WITH DEW POINTS IN THE 40S AND 50S BEHIND THE FRONT. THE STRONG COLD FRONT APPEARS TO BE MOVING EAST AROUND 25 TO 30 MPH WITH CONVECTION RIGHT ALONG IT. BREEZY AND MUCH COOLER WEATHER WILL BE SEEN ACROSS THE AREA TODAY WITH TEMPERATURES 10 TO 15 DEGREES BELOW NORMAL. HIGH PRESSURE WILL BUILD INTO THE MIDWEST. AND DIMINISHING WINDS WILL ALLOW TEMPERATURES TO DROP INTO THE LOWER 50S.
304 PM EDT SUN AUG 23 2015 THE LOWER KEYS CUMULUS LINE SPAWNED A FEW SHOWERS AND THUNDERSTORMS WHICH AFFECTED KEY WEST IN VICINITY DURING THE LAST FEW HOURS.
115 PM CDT SUN AUG 23 2015 THE SECOND ANOMALOUSLY STRONG SYSTEM OF THE WEEK HAS PUSHED A COLD FRONT THROUGH THE UPPER MISSISSIPPI OVERNIGHT BRINGING IN DEW POINTS 20 TO 25 DEGREES COOLER FROM YESTERDAY EVENING. AN IMPRESSIVE UPPER LOW SEEN ON WATER VAPOR IMAGERY CENTERED OVER CENTRAL MN WILL TRACK EAST THIS MORNING. A FEW SHOWERS ON THE BACKSIDE OF THIS LOW WILL BRUSH PORTIONS OF WESTERN AND CENTRAL MN EARLY THIS MORNING. BEFORE THE UPPER LOW LIFTS NORTHEAST AND MUCH DRIER MID LEVEL AIR ROTATES IN FROM THE NORTHWEST. SURFACE RIDGING WILL ARRIVE TONIGHT AND WHILE WINDS WILL EASE. THE LONGER TERM TRENDS CONTINUE TO SUPPORT A COOLER AND DRIER THAN NORMAL PERIOD THROUGH ABOUT MIDWEEK.
321 PM CDT SUN AUG 23 2015 BREEZY NORTHWEST WINDS ON THE BACK SIDE OF A DEPARTING LOW PRESSURE SYSTEM WILL CONTINUE THROUGH THE LATE AFTERNOON INTO THE EARLY EVENING BEFORE DROPPING OFF SIGNIFICANTLY AROUND OR SHORTLY AFTER SUNSET AS HIGH PRESSURE SETTLES IN OVER THE AREA. THE HIGH WILL THEN BE THE DOMINANT FEATURE OVER THE NORTHERN PLAINS THROUGH THE SHORT TERM PERIOD. HIGH TEMPERATURES ON MONDAY WILL RANGE FROM THE LOWER 70S ACROSS THE EAST TO THE UPPER 70S ACROSS THE WEST.
COLD FRONT WILL MOVE THROUGH TONIGHT AND WHILE THERE COULD BE SOME SCATTERED SHOWERS AND/OR THUNDERSTORMS. A WEAK FRONT WILL MOVE THROUGH THIS EVENING AND WHILE THERE IS A CHANCE FOR A THUNDERSTORM ALONG THE COLD FRONT.
HIRES MODELS INDICATE THAT THE ACTIVITY IN THE NW WILL SLOWLY DIMINISH WITH CONVECTION DEVELOPING ACROSS THE SOUTHEAST WHERE TEMPS HAVE RISEN INTO THE LOW/MID 80S. HAVE LOW CONFIDENCE IN THE EVOLUTION OF THE RAIN IN THE NW SO WILL CONTINUE WITH CHANCE POPS FOR MUCH OF THE AREA THRU EARLY AFTERNOON WITH CHANCES THEN DECREASING AS THE TROUGH AXIS SHIFTS FARTHER EAST.
331 PM CDT SUN AUG 23 2015 HIGH PRESSURE WILL BE RIDGED ACROSS MUCH OF THE MISSOURI RIVER VALLEY TONIGHT. WHILE A STRONG AREA OF LOW PRESSURE MOVES ACROSS SOUTHERN ONTARIO AND INTO WESTERN LAKE SUPERIOR. DRIER DEWPOINTS WILL ARRIVE OVERNIGHT AS WELL WITH VALUES IN THE LOW TO MID 40S BY LATE TONIGHT.
244 PM CDT SUN AUG 23 2015 COLD FRONT. OVERALL LITTLE CHANGE TO FORECAST THROUGH THE WEEK WITH MODELS HAVING TIMING AND STRENGTH ISSUES WITH PROGD S/WVS THAT RIDE ALONG DOWNSTREAM PORTION OF UPPER RIDGE. ONLY CONSISTENCY IS FOR STRONGER OF THE WAVES TO AFFECT THE REGION LATTER HALF OF THE WEEK SO THAT IS WHERE THE HIGHER POPS WILL BE CONFINED.
Water vapor loop shows a vigorous closed upper level low moving into Minnesota early this morning. A cold front associated with this system was moving south across the central Plains and has nearly cleared south central Kansas early this morning.
DRY AND WARM CONDITIONS WILL PERSIST THROUGH THE NEXT SEVERAL DAYS AS A RIDGE OF HIGH PRESSURE MOVES NORTH.
A LOOK AT THE UPPER AIR MAPS TODAY SHOW THAT A DEEP LAYER RIDGE IS SET UP FROM TEXAS TO THE GULF. NORTH OF THE RIDGE THE HIGH LEVEL FLOW IS BECOMING NORTHWESTERLY WITH A SERIES OF UPPER LEVEL IMPULSES PUSHING SOUTHEAST FROM THE MID-SOUTH INTO THE SOUTHEAST. STORMS WERE BEGINNING TO DEVELOP ALONG THIS BOUNDARY OVER THE LOWER MISSISSIPPI DELTA AND INTO NORTHERN MISSISSIPPI.
359 PM CDT SUN AUG 23 2015 A SEASONABLY STRONG STORM SYSTEM AND ASSOCIATED UPPER-LEVEL CLOSED LOW LINGER OVER NORTHWEST ONTARIO THIS AFTERNOON. TROUGH OF WARM AIR ALOFT OVER NORTHERN MINNESOTA CONTINUED TO ENHANCE PRECIPITATION LATE THIS AFTERNOON. EXCEPT ALONG THE NORTH SHORE NEAR TWO HARBORS WHERE ADIABATIC COMPRESSION LEAD TO WARMER TEMPS THIS AFTERNOON. LOWS WILL RANGE FROM THE LOW 40S NORTHEAST. EXPECT HIGHS IN THE UPPER 40S IN FAR NORTHEAST MINNESOTA AND THE LOW 50S OVER MY FAR EASTERN ZONES.
A RIDGE OF HIGH PRESSURE CONTINUED TO EXPAND ACROSS THE GREAT BASIN THIS AFTERNOON AS A LOW PRESSURE TROUGH SETTLED INTO THE SW ALASKAN COAST. THE MODELS REMAIN STEADFAST WITH THE IDEA THAT A WEAK DISTURBANCE WILL LIFT OVER THE SHALLOW RIDGE AND ACROSS SRN IDAHO MONDAY AFTERNOON POSSIBLY PRODUCING ISOLATED CONVECTIVE BUILDUPS OVER THE MOUNTAINS.
244 PM CDT SUN AUG 23 2015 COLD FRONT HAS JUST PASSED EAST OF CMI AND SHELBYVILLE AT MID AFTERNOON. ISOLATED SHOWERS OVER NORTHERN VERMILION COUNTY JUST AHEAD OF COLD FRONT. MUGGY DEWPOINTS AROUND 70F AHEAD OF COLD FRONT IN EASTERN IL DROP OFF INTO MORE COMFORTABLE 50S TO NEAR 60F BEHIND THE COLD FRONT. LOWERED TEMPS AND DEWPOINTS A BIT MORE TONIGHT WITH LOWS TONIGHT MOSTLY IN THE LOWER 50S.
249 PM EDT SUN AUG 23 2015 A COLD FRONT WILL MOVE EAST OF THE AREA THIS EVENING BRINGING SHOWERS AND THUNDERSTORMS TO AN END AND ALLOWING SKIES TO CLEAR OVERNIGHT. LOWS TONIGHT WILL GENERALLY BE IN THE MID 50S WITH HIGHS MONDAY IN THE LOWER AND MIDDLE 70S.
UNSETTLED WEATHER WILL CONTINUE THROUGH THE FIRST HALF OF THE COMING WEEK AS ANOTHER COLD FRONT APPROACHES NEW ENGLAND ON MONDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY ABOVE NORMAL AS UPPER- LEVEL RIDGING CONTINUES TO RESIDE OVER THE SOUTHWEST.
RIDGE ALOFT WEAKENS AS A TROUGH MOVES OVER ALABAMA AND GEORGIA.
WEST WINDS WILL AFFECT WILDFIRES MORE THAN YESTERDAY SINCE THE THERMAL TROUGH HAS MOVED WELL INLAND AND THE PRESSURE GRADIENT HAS INCREASED. BUT THE LOWER CONDITIONS WILL PERSIST OFFSHORE.
Overnight lows will be in the lower to mid 70s inland and upper 70s along the coast.
220 PM EDT SUN AUG 23 2015 A SLIGHT CHANCE OF RAIN OVERNIGHT AS A WEAK COLD FRONT CROSSES THE REGION WILL BE FOLLOWED BY DRY CONDITIONS AND TEMPERATURES SLIGHTLY BELOW NORMAL THROUGH THE WEEK. CLOUD COVERAGE WILL INCREASE THIS EVENING AHEAD OF A WEAK COLD FRONT APPROACHING FROM THE WEST.
HIGH PRESSURE SHOULD BE IN THE AREA TOMORROW SO EXPECT ANOTHER ROUND OF MAINLY VFR CIGS AND LIGHT WINDS. HIGH PRESSURE AT ALL LEVELS WILL PROVIDE THE NEEDED SUBSIDENCE IN KEEPING ANY CONVECTION OUT OF THE TAFS TODAY. 31 WARMER TEMPERATURES ACROSS SOUTHEAST TEXAS WILL BE THE MAIN WEATHER STORY FOR THE NEXT COUPLE OF DAYS WITH HIGH PRESSURE IN CONTROL. A PATTERN CHANGE DEVELOPS IN THE UPCOMING WEEK AS MID/UPPER LEVEL RIDGING EVENTUALLY RETREATS TO THE WEST.
126 PM EDT SUN AUG 23 2015 COLD FRONT WITH LIMITED MOISTURE SUNDAY NIGHT INTO MONDAY. FOCUS THEN SHIFTS TO A COLD FRONT WHICH WILL MOVE THROUGH THE AREA LATE TONIGHT AND ON MONDAY. COLD FRONT TO THE EAST ON MONDAY. WITH HIGH PRESSURE BUILDING IN FROM THE WEST.
541 AM EST SUN JAN 24 2016 HIGH PRESSURE BUILDS IN TODAY AND SHIFTS OFFSHORE MONDAY NIGHT.
SPLITTING TROUGH WAS WORKING THROUGH THE FORECAST AREA EARLY THIS MORNING. QG FORCING FROM WARM ADVECTION ON THE FRONT SIDE OF THE TROUGH WAS GENERATING SOME WEAK RETURNS OVER CENTRAL AND EASTERN ZONES. AREA SOUNDINGS SUPPORT THE POSSIBILITY OF SOME FREEZING RAIN MIXING IN OVER PARTS OF SOUTHEAST MONTANA THIS MORNING. WILL ALSO NEED TO KEEP A CLOSE EYE ON CENTRAL ZONES AS NORTHWEST FLOW WITH THIS TYPE OF INSTABILITY IS OFTEN TIMES A GOOD SET UP FOR BANDING OF SNOW OFF THE HIGHER TERRAIN NORTHWEST OF BILLINGS. REGION WILL LARGELY BE UNDER UPPER RIDGING FOR TUE THROUGH THU.
934 AM CST SUN JAN 24 2016 THE COLD FRONT HAS MOVED THROUGH THE FA. SINCE VSBYS ARE THIS HIGH DO NOT PLAN TO EXTEND THE FOG MENTION THROUGH THE AFTERNOON. AND ALSO WILL MENTION SOME PATCHY FOG AND FREEZING DRIZZLE IN THE HIGHER TERRAIN AROUND DETROIT LAKES TO PARK RAPIDS AND PUBLIC REPORTS INDICATE SOME FZDZ. BUT A SHORT WAVE TROUGH WILL MOVE THROUGH THE AREA LATER TONIGHT INTO MONDAY MORNING.
AREAS OF FREEZING FOG ARE THE PRIMARY WEATHER ISSUE THIS MORNING WITH NUMEROUS LOCATIONS ALONG THE HILINE AND IN SOUTHWEST MT HAVING VISIBILITIES OF ONE-QUARTER TO ONE MILE. THE FREEZING FOG ADVISORY FROM HELENA TO BOZEMAN REMAINS IN EFFECT UNTIL 11 AM.
1054 AM EST SUN JAN 24 2016 THE HIGH PRESSURE THAT HAS BEEN OVER THE AREA WILL BE MOVING ON TO THE EAST AS A LOW PRESSURE APPROACHES FROM THE WEST TONIGHT. HIGH TEMPERATURES TODAY WILL BE IN THE LOWER TO MIDDLE 30S. LOWS TONIGHT WILL BE IN THE LOWER 20S. INCREASING MIXING TONIGHT WILL YIELD MUCH WARMER MINS AND CONTD DRY AS RTN MSTR TONGUE AHD OF PLAINS LOW HOLDS WELL WEST OF THE AREA. INCREASINGLY SHEARED AND RAPIDLY DAMPENING MID/UPPER LEVEL TROUGH WILL LIFT ACROSS THE REGION LATE MONDAY. THERE WILL HOWEVER BE A DECENT THETA-E SURGE AHEAD OF THE ASSOCIATED COLD FRONT WITH MODEST 285-290K ISENTROPIC ASCENT AND MIXING RATIOS CLIMBING ABOVE 4 G/KG AT THAT LEVEL. COULD BE A VERY BRIEF PERIOD OF FREEZING/FROZEN PRECIP RIGHT AT THE ONSET BEFORE BECOMING ALL RAIN BY MONDAY EVENING.
DRY WEATHER IS EXPECTED THROUGH TONIGHT AS A RIDGE OF HIGH PRESSURE MOVES ACROSS CENTRAL INDIANA. A WARM FRONT WILL APPROACH INDIANA FROM THE SOUTHWEST MONDAY AFTERNOON BRINGING CHANCES FOR RAIN.
Extensive high cloudiness spreading across eastern OK and northwestern AR this morning should persist as short wave trough approaches. Cold front will shift east of the area by mid afternoon Monday with rain chances ending.
532 AM CST Wed Jan 8 2020 Water vapor imagery shows the next system pushing into the west coast with ridging over the Rockies.
A weak cold front extends from the lower Great lakes southwest through extreme southern IN into south central MO. But, high pressure over the eastern Northern Plains will be moving southeast today marking the entrance of a cooler air mass defined by average temperatures for this time of year. High pressure will drift southeast into the IL/IN regions today into early tonight, and there is another high pressure sitting down over the Gulf Coast states. The low level jet will increase over the area and couple with mixing and shoot temperatures into the upper 50 to lower 60s across the area.
631 AM EST Wed Jan 8 2020 VFR to prevail through the period beneath high pressure. High pressure at the surface and aloft will result in fair skies, low dewpoints, and mildly above normal temps. Westerly winds will be breezy in the higher mountains today, upwards of 20 mph or so.
326 AM CST Wed Jan 8 2020 Surface ridging built into the region overnight and will continue to slide to the east through today. Back to the south and east, will have 20s to lower 30s with increasing warm air advection as high pressure moves away.
A large area of high pressure centered over the Southeast United States today, will expand and spread into the western Atlantic Ocean and down the Florida Peninsula through Thursday night. Thereafter, the massive and hefty area of high pressure will be aligned across the Southeast United States and the Sunshine State through the end of this week.
/EC/ Today through tonight: High pressure will continue to influence the weather over the ArkLaMiss region in the near term.
Water vapor imagery this morning an upper ridge across the northwest CONUS being displaced eastward in response to a system digging along the west coast. Meanwhile, surface obs were revealing high pressure centered over eastern ND. Also, the leading edge of a cold front extended roughly from northern IA to western ND. Max temperature spread over the CWA will increase as a result of the cold air advection filtering in with highs ranging from the low 40s north to the low 50s southeast.
347 AM CST Wed Jan 8 2020 Quiet weather will continue across the Mid-South today as high pressure currently over the Mid-South will begin to shift east.
702 AM EST Wed Jan 8 2020 A dry front across south FL drifts into the Florida Keys later this morning as sprawling high pressure centered near the LA/MS border tracks east. Temperatures from the mid 30s to mid 50s at 7 AM reach the mid 60s to the lower 70s. High pressure tracking by north of the waters maintains northeasterly winds.
401 AM EST Wed Jan 8 2020 Dry high pressure will be over the area through Thursday.
336 AM CST Wed Jan 8 2020 Water vapor imagery this morning an upper ridge across the northwest CONUS being displaced eastward in response to a system digging along the west coast. Meanwhile, surface obs were revealing high pressure centered over eastern ND. Also, the leading edge of a cold front extended roughly from northern IA to western ND. Max temperature spread over the CWA will increase as a result of the cold air advection filtering in with highs ranging from the low 40s north to the low 50s southeast.
The cold front passage this morning left a dry air mass behind, with morning soundings indicating precipitable water values of 0. A brief period of Small Craft Advisory conditions behind the cold front passage this morning. Pressure gradient tightens as strong high pressure to the north builds down across the area.
As of now, these winds are on the lower side of advisory levels so will hold off on issuing an advisory. A line of moisture is pushing east this morning in the thermal gradient between arctic high pressure to the east and low pressure moving off the Rockies. As the low moves east into the Dakotas, southeast winds will become breezy across the region at 20 to 30 mph with gusts to 40 mph. The bulk of the forcing will be centered over ND with this low. Temperatures will be much colder in the east today under the lingering influence of the high topping out in the lower teens.
Mostly sunny skies will prevail with temps ranging from the mid to upper 50s north, along the KY/MO borders, to the lower 60s south, across North MS. /issued 347 AM CST Wed Jan 8 2020/ Quiet weather will continue across the Mid-South today as high pressure currently over the Mid-South will begin to shift east.
High pressure will remain in place across Middle Tn giving us a really nice sunny day. Weak high pressure will influence Middle TN today providing dry conditions and light southwest winds.
1016 AM MST Wed Jan 8 2020 The flow aloft will be westerly early today and will become more southwest thru the day as an upper level trof moves over UT. Surface winds will increase later today with the approach of that upper trof, with areas of gusty southwest winds. Tonight the upper level trof will moves across CO and is expected to bring some snow to the Continental Divide, with the Sawatch and Mosquito ranges seeing the highest chances for snow, but just some light accumulations.
252 PM CST Wed Jan 8 2020 High pressure will shift east overnight and surface southeast flow will turn a bit more southerly and weaken. Along and east of Interstate 29 will see the better chance for rising temperatures while the James Valley and points west will see the better chances for a somewhat normal diurnal fall as the weak trough axis moves in. Strong warm air advection aloft will shift north through the area but not anticipating any precipitation as the low and mid levels are too dry.
Temperatures around the region have already started to recover after most sites dropped slightly below freezing this morning. Temperatures are still expected to warm into the lower 60s areawide under mostly clear skies. Prior discussion below: Today through tonight: High pressure will continue to influence the weather over the ArkLaMiss region in the near term.
/issued 702 AM EST Wed Jan 8 2020/ A dry front across south FL drifts into the Florida Keys later this morning as sprawling high pressure centered near the LA/MS border tracks east. Temperatures from the mid 30s to mid 50s at 7 AM reach the mid 60s to the lower 70s. High pressure tracking by north of the waters maintains northeasterly winds.
1120 AM EST Wed Jan 8 2020 Dry high pressure will be over the area through Thursday.
1241 PM EST Wed Jan 8 2020 Dry high pressure will be over the area through Thursday.
An upper low will deepen over the Four Corners region and amplify ridging/SW flow across the eastern U.
A weak cold front extends from the lower Great lakes southwest through extreme southern IN into south central MO. But, high pressure over the eastern Northern Plains will be moving southeast today marking the entrance of a cooler air mass defined by average temperatures for this time of year. High temperatures in the low 30s north to low 40s south still on track, with sunny skies and the occasional bit of cirrus for most of the area and some lake stratocu possible over the north/northeast counties. High pressure will drift southeast into the IL/IN regions today into early tonight, and there is another high pressure sitting down over the Gulf Coast states. The low level jet will increase over the area and couple with mixing and shoot temperatures into the upper 50 to lower 60s across the area.
The low level jet will kick in late tomorrow morning with gusty winds expected again.
Moisture will be on the increase from the south, but current models keep the low clouds just south and southeast of our terminals.
155 PM MST Wed Jan 8 2020 20z surface analysis had warm front from southwest SK to the Black Hills and then into eastern CO. Weak lows were located over southwest SK and over northeast WY, both in response to upper trough rolling across the northern Rockies into the northern Plains. Another upper trough pushing into the northwest CONUS. Tonight, upper trough shifts eastward as warm front weakens and cold front develops over eastern MT into central WY.
Additional moisture indicated by radar across portions of the Treasure and Magic Valleys associated with the passage of the first in a series of troughs.
Current satellite loop shows clear skies across the region this afternoon as a high pressure ridge centered over southern AL dominates the weather pattern. This ridge is expected to move NE over the next 24 hours putting GA in moist East to Southeasterly flow.
/issued 516 AM CST Wed Jan 8 2020/ VFR conditions will prevail throughout today as high pressure remains over the area. Coupled with the clear skies, temperatures range from the lower/mid 30s north of I-10, with upper 30s/lower 40s elsewhere. With mostly clear skies expected again today, afternoon highs expected to reach the lower/mid 60s. High pressure will slip further east this evening and overnight, with east to southeast winds returning Gulf moisture and higher dewpoints overnight. By this time, will begin seeing the first influences of the approaching deep layer trough over the Western U.
212 PM EST Wed Jan 8 2020 High pressure over the region will shift eastward and begin to direct an onshore flow into the forecast area Thursday.
High pressure will remain in place across Middle Tn giving us a really nice sunny day.
1105 AM CST Wed Jan 8 2020 Water vapor imagery shows the next system pushing into the west coast with ridging over the Rockies.
1123 AM CST Wed Jan 8 2020 Surface ridging built into the region overnight and will continue to slide to the east through today. Back to the south and east, will have 20s to lower 30s with increasing warm air advection as high pressure moves away.
203 PM EST Wed Jan 8 2020 High pressure moving over the area will stop the snow showers this evening and bring dry and tranquil conditions for Thursday.
Mostly sunny skies will continue today, and with recent observations running warmer, have bumped high temps up a couple of degrees this afternoon. VFR is expected through the period as high pressure remains anchored just south of the region. RG Chattanooga Airport, TN 34 59 49 62 58 / 0 0 0 50 90 Knoxville McGhee Tyson Airport, TN 31 57 46 64 56 / 0 0 0 30 70 Oak Ridge, TN 31 57 46 63 55 / 0 0 0 30 80 Tri Cities Airport, TN 27 54 40 61 52 / 0 0 0 10 70.
However, as we progress into Thursday afternoon and Thursday evening the cold front will push southeastward through the area providing extra lift in concert with a 50-60 knot LLJ nosing into the area.
236 PM PST Wed Jan 8 2020 A fast moving low pressure system from the northwest will move across California on Thursday.
303 PM MST Wed Jan 8 2020 Temperatures trend colder on Thursday, ranging from the teens along the HiLine to the lower 30s for Southwest valleys.
500 PM MST Wed Jan 8 2020 Aviation Section Updated Temperatures trend colder on Thursday, ranging from the teens along the HiLine to the lower 30s for Southwest valleys.
No changes were needed for the late eve update as residual snow showers to the north of Pit will wane with building high pressure. An upper low will deepen over the Four Corners region and amplify ridging/SW flow across the eastern U.