Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH PRESSURE SURFACE AND ALOFT ACROSS THE WESTERN ATLANTIC, WILL DELIVER EASTERLY FLOW, ALONG WITH QUICK SHOWERS MOVING ONSHORE ALONG THE EAST COAST WITH GUSTY WINDS. AS SHRTWVS CONTINUE BOMBARDING THE PAC NW AND WESTERN CANADA, A TROUGH WILL BE CARVED OUT ACROSS THE INTERMOUNTAIN REGION. WITH A COLD FRONT ENTERING THE MISSISSIPPI RIVER VALLEY AND STALLING, SURFACE WINDS WILL VEER TO THE SOUTHEAST THROUGH H5.
1211 AM EST MON DEC 21 2015 AVIATION A LOW PRESSURE SYSTEM LOCATED IN THE CENTRAL PLAINS WILL TAKE A TRACK THROUGH LOWER MICHIGAN ON MONDAY. A WEAK AREA OF HIGH PRESSURE MOVES IN FOR TUESDAY PROVIDING MOSTLY DRY WEATHER TO THE REGION.
314 AM EST MON DEC 21 2015 MOISTURE WILL BE ON THE INCREASE IN THE SOUTHERLY FLOW BETWEEN OFFSHORE HIGH PRESSURE AND A FRONTAL SYSTEM SLOWLY APPROACHING FROM THE WEST THROUGH TONIGHT. USED THE COOLER TEMPERATURE GUIDANCE TODAY BECAUSE OF A COOL START AND CLOUDINESS. THE MOIST SOUTH FLOW BETWEEN OFFSHORE HIGH PRESSURE AND THE FRONTAL SYSTEM TO THE WEST WILL CONTINUE.
226 AM EST MON DEC 21 2015 HIGH PRESSURE WILL REMAIN OFF THE COAST TODAY. A COLD FRONT WILL APPROACH FROM THE WEST TUESDAY.
ANOTHER COLD FRONTAL PASSAGE EARLY IN THE DAY. WITH SIGNIFICANT DOWNSLOPE WINDS IN THE LOW LEVELS. A COLD FRONT WILL ALSO MOVE FROM NORTHWEST TO SOUTHEAST ACROSS THE AREA AS WELL.
/ISSUED 914 PM CST SUN DEC 20 2015/ SHOWERS CONTINUE TO DEVELOP OVER THE MS DELTA AHEAD OF A COLD FRONT THAT STRETCHES ACROSS THE CENTRAL PLAINS. TEMPERATURES ARE IN THE LOW TO MID 50S UNDER PARTLY CLOUDY SKIES AREAWIDE.
1134 PM CST SUN DEC 20 2015 SFC COLD FRONT HAS PUSHED SOUTH OF THE CWA THIS AFTERNOON WITH NORTHWEST WINDS AT 10 TO 20 MPH IN ITS WAKE. UPPER LEVEL RIDGE HAS SHIFTED EAST TODAY. WITH A TROUGH ALONG THE ROCKIES. ANOTHER SUBTLE TROUGH IS ALONG THE WEST COAST.
12z NAM does drop thickness down to 543 dm on the higher terrain this evening, so mentioned the mix. Associated cold front along a Wakeeney-Syracuse line at 6 pm will make quick progress across SW KS this evening, reaching Kiowa and Barber county around midnight. Afternoon highs ranging from the upper 40s on the lingering melting snowpack, to the lower 50s elsewhere. Broad trough deepens over the central U.
WE WILL ISSUE A WINTER STORM WATCH ALONG AND NORTH OF THE HIGHWAY 2 CORRIDOR IN ND ANGLING TO THE NORTHEAST INTO NORTHERN BELTRAMI/LAKE OF THE WOODS COUNTIES IN MN.
MIDWEST LOW PRESSURE IS EXPECTED TO TRACK NEWD INTO THE GREAT LAKES.
MODEL GUIDANCE SUGGESTS UPPER SHORT WAVE TROUGH. BUT HOLD OFF ON THE HIGHEST POPS UNTIL ABOUT 210800Z-210900Z. SHOULD SEE FAIRLY STRONG WARM ADVECTION TONIGHT GIVEN THE STRENGTH OF THE LOW LEVEL JET. SHOULD SEE A BREAK IN THE PRECIPITATION THREAT ON TUESDAY AS UPPER HEIGHTS BUILD LOCALLY DUE TO DIGGING OF NEXT TROUGH THROUGH THE ROCKIES AND PLAINS.
A LOW PRESSURE SYSTEM WILL PUSH THROUGH THE REGION TODAY.
AHEAD OF AN UPPER TROF/CDFNT OVER THE CENTRAL PLAINS.
With cold front remaining to the west until late in the day, strong southerly winds gusting to between 25 and 30 mph will continue to provide unseasonably warm conditions, resulting in high temperatures in the middle to upper 50s.
00Z REGIONAL SOUNDINGS SHOW VERY DRY AIR IN THE LOW AND MIDLEVELS.
RAIN SHOULD COME TO AN END BY TUESDAY AFTERNOON AS RIDGING BUILDS IN BEHIND THE DEPARTING SYSTEM.
DEEP MOISTURE WILL ARRIVE TONIGHT AS AN IMPULSE IN THE SW FLOW ALOFT MOVES NE FROM THE LOWER MS RIVER VALLEY. LOWS TONIGHT WILL BE MILD WITH READINGS IN THE LOW/MID 60S. HIGH PRESSURE RIDGE NUDGES NORTHWARD UP THE FLORIDA PENINSULA AND PUSHES NEXT IMPULSE FURTHER NORTHWARD INTO CENTRAL GEORGIA. RIDGE OF HIGH PRESSURE ACROSS THE FLORIDA PENINSULA WILL HOLD IN PLACE AND CONTINUE TO KEEP MOST OF THE SOUTHWEST FLOW ALOFT ENERGY/LIFT/MOISTURE JUST NORTHWEST OF THE REGION WITH ONLY A SLIGHT CHANCE OF SHOWERS AT TIMES. THE MAIN STORY WILL BE THE UNSEASONABLY WARM DAYTIME HIGHS IN THE LOWER TO MIDDLE 80S AND RECORD WARM OVERNIGHT LOWS IN UPPER 60S/NEAR 70.
A lee trough of low pressure will deepen with light south winds of 5 to 12 mph. Broad trough deepens over the central U.
THE MAIN WEATHER CONCERNS THROUGH THE FORECAST PERIOD WILL BE FREEZING FOG ACROSS THE LOWER VALLEYS OF SOUTHWEST MONTANA AND THE POSSIBILITY FOR SNOWFALL ACROSS THE AREA. FREEZING FOG HAS BEEN SLOW TO DIMINISH OVER THE SOUTHWEST VALLEYS TODAY. INCREASING WESTERLY FLOW IN THE LOWER LEVELS COULD BE ENOUGH TO SCOUR OUT THE FOG BY EARLY MONDAY MORNING. SNOW SHOWERS WILL BE LIGHT BUT INTENSITY WILL INCREASE MONDAY EVENING AND SPREAD INTO THE LOWER ELEVATION AT TIMES MONDAY NIGHT AND TUESDAY. SEVERAL INCHES ARE LIKELY IN THE HIGH ELEVATIONS WITH UP TO TWO INCHES IN THE PLAINS. PERSISTENT WESTERLY FLOW WILL RESULT IN DRIER CONDITIONS IN THE LOWER VALLEYS AND PLAINS NEAR THE ROCKY MOUNTAIN FRONT.
UPPER TROUGH WILL PROVIDE SOME ENERGY FOR CONVECTION MAINLY NORTHEAST EACH DAY. IN FACT LIKELY A COUPLE OF DEGREES WARMER TODAY WITH WARMER BOUNDARY LAYER WINDS AND CLEARING OVER SOME OF THE WESTERN AREAS. MOST OF THE ENERGY FROM THE NEXT TROUGH WILL BE NORTH OF THE CWFA. EVEN WARMER TUESDAY ESPECIALLY WEST WHERE MORE MID/UPPER LEVEL DRYING OCCURS AND ALLOWS FOR SUNSHINE. WINDS DIMINISH TODAY AS TROUGH MOVES TOWARD COAST. DEW POINTS IN THE LOWER 70S OFFSHORE WILL MOVE OVER THE COOLER WATERS LATER TODAY.
Water vapor imagery depicts a well defined shrtwv trof in wrn NM and consensus of model data is that shrtwv trof will pass to the north of CWFA today. This will result in cooler 85h temps, but still warm enuf for above normal temps and with 85h winds of 15-25kts it will briefly be breezy after 18Z. Still warm on Thur with backdoor front lurking to the ne and could result in cooler temps there Thur. Still looks to be an unseasonably warm Christmas as surface pressure falls occur ahead of an upper low moving into the desert SW.
WELL IN PHASE WITH THE UPPER LOW VISIBLE ON WV. GUSTY SOUTH WINDS WILL RELAX SOME THIS EVENING BEFORE A WEAK COLD FRONT WILL MOVE SOUTH THROUGH THE AREA WITH MUCH LIGHTER WINDS FOR LATE TONIGHT AND MONDAY. BUT TEMPS WILL BE CLOSE TO TODAY AS SLIGHTLY COOLER AIRMASS WILL OVERSPREAD THE OKLAHOMA AND NORTH TEXAS. ANOTHER WEAK COLD FRONT WILL THEN PUSH THROUGH WITH MAINLY MILD/DRY WEATHER INTO THE DAY ON CHRISTMAS.
A FAST MOVING UPPER LEVEL TROUGH WILL MOVE ACROSS THE AREA TONIGHT.
TSRA IS MOST LIKELY AT THE LFK/SHV/ELD/MLU TERMINALS SO CONTINUED THIS TREND MID MORNING THROUGH AFTERNOON BEFORE A COLD FRONT MOVES INTO THE REGION FROM THE WEST WITH PRECIPITATION TAPERING OFF AFTER 00Z ACROSS OUR EASTERN TERMINAL LOCATIONS.
EXTENDING NEWD FM THE LOW. A COLD FRONT WAS MAKING PROGRESS THROUGH NORTHERN KS/ERN NEB. ANY PRECIP SHOULD SHIFT SE OF THE FA BY 12Z MON WITH CAA THROUGH THE DAY WITH MUCH COOLER HIGHS. BUT THE GFS IS COOLER THAN THE EC. NOT ONLY DO THEY DIFFER IN EVOLUTION OF THE TROUGH. NAEFS/ECMWF ENSEMBLES INDICATE THAT WE ARE LIKELY TO SEE MORE OF A POSITIVELY-TILTED LONG-WAVE TROUGH MOVE THROUGH THE CENTRAL CONUS OVER THE WEEKEND. BUT GIVEN THE POSITIVELY-TILTED UPPER TROUGH A SIGNIFICANT CLOSED LOW IN THE PLAINS APPEARS UNLIKELY AS WELL. STILL CANNOT RULE OUT BRIEF AND VERY LIGHT FREEZING DRIZZLE/RAIN AT KOMA/KLNK.
WITH WARMER 50S RESULTING FROM A STRONGER SOUTH/SOUTHWEST WIND IN THE SOUTHEAST QUARTER OF THE FORECAST AREA. HELPING TO DECREASE CLOUDS AND TAKE THE EDGE OFF THE COOLER AIR.
A WEAK WARM THERMAL ADVECTION PATTERN IS EVIDENT IN THE LOWER TROPOSPHERE. A SURFACE ANALYSIS EARLY THIS MORNING REVEALS A SPRAWLING ANTICYCLONE CENTERED OVER THE WESTERN NORTH ATLANTIC BETWEEN BERMUDA AND THE CAROLINAS. EXTENDING A RIDGE SOUTHWESTWARD ACROSS MOST OF THE GULF OF MEXICO. AFTERNOON HIGH TEMPERATURES WILL APPROACH THE LOWER TO MID 80S WELL INTO THE LAST WEEK OF DECEMBER AS WELL.
For the short term, blended the higher resolution HRRR explicit model convective suite with the broader ECMWF/Canadian/GFS to account for precipitation chances within and across several hours. Added a wing of isolated thunderstorm chances riding up the southeast MO foothills and into Southwest IL toward the I-64 corridor through the noon hour and the instability works northeast with the approaching wave and slowing and weakening cold front.
Coverage of showers has increased markedly in the past hour or so across central/NE and western MO in response to large scale lift associated with migratory short wave trof moving into the central Plains, and low level WAA and moisture transport. This later band will be occuring ahead of the vort max attendant with the short wave trof.
1217 AM EST MON DEC 21 2015 HIGH PRESSURE EXITS THE AREA OVERNIGHT. HIGH PRESSURE WILL SLIDE EASTWARD MAKING ROOM FOR THE NEXT SYSTEM TO APPROACH THE FORECAST AREA. THESE CLOUDS COULD CREATE SOME ISSUES WITH THE LOW TEMPERATURES OVERNIGHT. COULD SEE TEMPS A FEW DEGREES WARMER THAN CURRENT HAVE FORECAST. DRAGGING A WEAK COLD FRONT THROUGH AS A SECONDARY WAVE OF LOW PRESSURE RIDES UP THE FRONT TO OUR SOUTH AND EAST. THE SECOND PERIOD OF PRECIPITATION IS ASSOCIATED WITH A WARM FRONT. WENT WITH A NON-DIURNAL TEMPERATURE TREND MONDAY NIGHT AHEAD OF THE COLD FRONT.
MID AND HIGH LEVEL CLOUDS SHOULD CONTINUE TO INCREASE OVERNIGHT AHEAD OF ADVANCING MIDWEST LOW PRESSURE.
WAA IS IN FULL SWING ACROSS THE MID STATE WITH SOUTH WINDS GUSTING UP TO 30 MPH AND TEMPERATURES RUNNING 20 OR MORE DEGREES WARMER THAN YESTERDAY AT THIS TIME.
VIGOROUS SHORT WAVE TROF UPSTREAM CENTERED NEAR MKC WL TRACK E-NE THIS MRNG ACROSS NRN IL. WEAK INVERTED SFC TROF REMAINS IN THE AREA AS A WEAK AXIS OF SHORT WAVE ENERGY MOVES ACROSS SRN WI.
WINDS WILL CONTINUE TO DIMINISH AND THEN BECOME MORE WNW TO NW AS A WEAK COLD FRONT MOVES THROUGH THE TX AND OK PNHDLS. /ISSUED 958 PM CST SUN DEC 20 2015/ UPDATED MIN TEMP TO BE JUST A BIT WARMER OVERNIGHT THAN PREVIOUSLY FORECAST AND ADJUSTED HOURLY TEMPS TO REFLECT HIGHER TEMPS DUE TO WINDS STAYING HIGHER. WINDS WILL DIMINISH LATE THIS EVENING AND THEN BECOME MORE WNW AS A WEAK COLD FRONT MOVES THROUGH THE AREA. WEAK COLD FRONTS ARE EXPECTED TONIGHT.
A STRONG COLD FRONT ASSOCIATED WITH THE UPPER-WAVE EXTENDED FROM EXTREME NORTHWEST MO. THE STRONG COLD FRONT PRODUCED A SHARP TEMPERATURE GRADIENT AS TEMPERATURES IN CENTRAL KS HAD DROPPED INTO THE LOWER 30S WHILE SOUTHEAST KS WAS STILL IN THE MID 50S AIDED BY SOUTHERLY 15-25 MPH WINDS. THE STRENGTHENING WAVE WILL SWEEP A COLD FRONT SE ACROSS THE KS NEIGHBORHOOD TUE NIGHT. AS THE WAVE APPROACHES A DOWNSTREAM UPPER RIDGE WILL AMPLIFY AS IT GETS PUSHED E TOWARD THE MS VALLEY THU & THU NIGHT. UPPER WAVE SHOULD DECELERATE & STRENGTHEN FURTHER OVER THE CENTRAL & SOUTHERN ROCKIES WHERE IT IS PROGGED EVOLVE INTO A CUT-OFF MID TO UPPER LOW FRI NIGHT & SAT. MEANWHILE A COLD FRONT IS PUSHING SOUTHWARD ACROSS KANSAS TONIGHT AND SHOULD CLEAR SOUTHEAST KANSAS SHORTLY AFTER SUNRISE.
TODAY THROUGH SATURDAY NIGHT WITH THE COLD FRONT EAST OF ARKANSAS. HIGH PRESSURE IS BUILDING INTO THE STATE. MODELS INDICATE SOME MOISTURE WILL RETURN TODAY ON THE LEADING EDGE OF AN UPPER TROUGH AND WILL BRING LOW AND MID LEVEL CLOUDS. THE UPPER TROUGH WILL MOVE TO THE EASTERN U. SATURDAY AND AN UPPER RIDGE WILL BUILD OVER INTO THE ROCKIES.
FLOOD WARNINGS ARE CURRENTLY ISSUED FOR THE TOMBIGBEE RIVER AND FOR SELDEN DAM ON THE LOWER BLACK WARRIOR FOR MINOR FLOODING.
OUR MAIN FOCUS TODAY WILL BE ON THE MID LEVEL TROUGH AXIS AND THE ASSOCIATED SFC COLD FRONT DROPPING IN LATE THIS MORNING AND AFTERNOON. THINGS DRY OUT FOR MUCH OF THE NIGHT AS HIGH PRESSURE BRIEFLY MOVES THROUGH THE AREA. ANOTHER FAST APPROACHING MID LEVEL TROUGH AND SURFACE WAVE WILL DROP INTO WISCONSIN LATE TONIGHT AND THIS COULD SPREAD SOME LIGHT SNOW CHANCES INTO AREAS NORTHWEST OF MADISON AFTER ABOUT 4 AM TONIGHT/SAT MORNING. ONLY THE NEAR SURFACE LAYER IS EXPECTED TO BE ABOVE FREEZING DURING THE DAY. WITH THE FREEZING LEVEL MAINLY LESS THAN ONE THOUSAND FEET ABOVE GROUND LEVEL. MODELS HAVE BEEN CONSISTENTLY SHOWING A PRETTY TIGHT PRESSURE GRADIENT AS THE LOW MOVES THROUGH.
A COLD FRONT WILL THEN MOVE THROUGH SOUTH TEXAS FRIDAY WITH NORTHERLY WINDS GUSTING DURING THE AFTERNOON AND EVENING HOURS. WATER VAPOR IMAGERY SHOWS A WEAK SHORT WAVE TROUGH OVER SOUTHERN COAHUILA MOVING TO THE NORTHEAST. WITH SUPPORT FROM THE SHORT WAVE TROUGH APPROACHING. A COLD FRONT IS FCST TO MOVE THROUGH S TX TOWARD FRI MORNING AND MOVE THROUGH S TX THROUGH FRI. N WINDS WILL DVLP BEHIND THE BDRY AND WILL STRENGTHEN THROUGH FRI AFTERNOON AND ESPECIALLY FRI EVENING AS HIGH PRESSURE SURGES S.
THE MAIN COLD FRONT APPEARS TO BE EAST OF THE MISSISSIPPI RIVER.
247 AM CDT FRI APR 1 2016 Deep northwest flow continues across the region this morning, with early morning temperatures falling into the low to mid 40s. Temperatures tonight are then expected to fall to near freezing across much of the region. Temperatures on Saturday will recover a few degrees into the low to mid 60s, with continued breezy west winds.
Water vapor loop with RAP analysis overlay revealed a deep longwave trough axis across central North America. There is a secondary surge of cooler air tied to this feature as well, however the timing of the cold air advection will be this evening, such that there will not be any impact in temperatures this afternoon. For tonight, high pressure at the surface will nose southward, however there will still be enough of a pressure gradient to keep winds in the 9 to 12 knot range. The southern jet stream will be less active with a closed low expected to form well off the southern California Coast.
SURFACE OBS PLACE THE COLD FRONT IN THE WESTERN SECTIONS OF THE OHX CWA. IT GENERATES SOME STRONG MIDLEVEL FORCING AND INSTABILITY THAT APPEARS WAY OVERDONE GIVEN THE POSITIVE TILT OF THE UPPER TROUGH. BUT WILL LEAN TOWARD THE COOLER GFS MOS GUIDANCE.
A STRONG RIDGE REMAINS OVER THE PACIFIC NORTHWEST TODAY, AND WHILE IT WILL GRADUALLY SHIFT EAST, WE WILL STILL SQUEEZE ANOTHER MOSTLY SUNNY AND WARM DAY OUT OF IT. AT THE COAST, STRATUS HAS ALREADY MOVED ONSHORE, AND THE FLOW, WHILE WEAK, REMAINS ONSHORE TODAY, SO TEMPERATURES WILL BE MUCH COOLER THAN INLAND AREAS. THE RIDGE BREAKS DOWN, AND ITS AXIS MOVES INTO THE GREAT BASIN TOMORROW.
400 AM MDT FRI APR 1 2016 High pressure has begun to build over the region today, resulting in warm, pleasant weather for the Northern Rockies. The high pressure will briefly flatten Saturday as a very weak disturbance passes through.
A STRONG RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION PROVIDING WARM DRY CONDITIONS AND LIGHT WINDS.
HIGH PRESSURE WILL BRING FAIR AND WARMER WEATHER THIS WEEKEND.
BREEZY CONDITIONS ARE EXPECTED TODAY AND TONIGHT AS HIGH PRESSURE BUILDS OVER THE SOUTHERN PLAINS. COOLER WEATHER IS EXPECTED TONIGHT AS LOW TEMPERATURES WILL FALL INTO THE UPPER 40S TO LOWER 50S WITH CLEARING SKIES.
THAT LAST RESIDUAL OF THE TROUGH WILL MOVE EAST OF THE AREA TODAY. A STRONG RIDGE WILL THEN PHASE IN FROM THE WEST THIS WEEKEND.
400 AM CDT FRI APR 1 2016 (Today and Tonight) As of 4 AM, surface winds from the northeast dominate the forecast area as surface cold air associated with a cold front slide south across the forecast area. The atmosphere is moistening and light rain is expected to develop across the forecast area by morning in association with the cold front and an approaching upper level trough moving into the area from the west. Expect mostly cloudy skies, light to moderate rain and much cooler temperatures with highs Friday briefly reaching into the low to mid 50s before a cooler batch of air moves into the area dropping temperatures into the 30s across the area by Saturday morning.
220 AM MST FRI APR 1 2016 A PERSISTENT LOW PRESSURE SYSTEM WILL SLOWLY EXIT THE REGION TODAY WITH ONLY A SLIGHT CHANCE OF LIGHT SHOWERS OVER MOUNTAINOUS AREAS OF EASTERN ARIZONA.
420 AM CDT FRI APR 1 2016 LARGE SCALE ASCENT WILL SPREAD ACROSS THE AREA TODAY OVERTOP A 700 MB FRONT AS AN UPPER TROUGH OPENS AND MERGES WITH A BROADER TROUGH MOVING ACROSS THE PLAINS. PRECIP SHOULD COMPLETELY EXIT THE AREA THIS EVENING AS THE UPPER TROUGH AXIS MOVES ACROSS AND EAST OF THE REGION.
NEXT WAVE IS HEADED SOUTH WITH SNOW SHOWERS ALREADY CLOSE TO THE ND/SD BORDER NORTH OF MOBRIDGE. THE MODELS SHOW ANOTHER SHORT WAVE TROUGH SLIDING SOUTH AND AFFECTING CENTRAL AND NORTH CENTRAL SOUTH DAKOTA TONIGHT. ANOTHER LOW PRESSURE AREA MOVING ACROSS THE NORTHEAST PART OF THE REGION MAY BRING SOME SLIGHT CHANCES OF RAIN/SNOW TO OUR NORTHEAST CWA FRIDAY NIGHT. WINDS WILL TURN SOUTH AND INCREASE ON SATURDAY NIGHT IN ADVANCE OF THE NEXT SOUTHEAST MOVING LOW PRESSURE AREA FROM CANADA ON SATURDAY NIGHT. THE W THIRD OF THE NATION WILL BE DOMINATED BY A 500MB RIDGE. WHILE THE E THIRD HAS A TROUGH.
SOME MARINE AIR WILL BRING AREAS OF MORNING FOG TO SOME PARTS OF WESTERN WASHINGTON ON FRIDAY WHILE A STRONG UPPER RIDGE REMAINS OVER THE REGION.
GENERAL WEATHER PATTERN THE NEXT TWO DAYS IS AN UPPER LEVEL RIDGE MOVING EAST FROM THE PACIFIC NORTHWEST AND FLATTENING. TEMPERATURES WILL BE ABOUT 10 DEGREES WARMER BUT THERE WILL BE PERSISTENT HIGH LEVEL CLOUDS AS THE NORTHERLY FLOW ALOFT IS TAPPED INTO A GOOD PLUME OF MOISTURE OVERRUNNING THE UPSTREAM RIDGE. WARMER DAY ON SATURDAY WITH SURFACE FLOW BECOMING MORE DOWNSLOPISH AND MORE SUNSHINE HELPING PUSH TEMPERATURES UPWARDS.
An upper level longwave trough will continue to move away from the region. At the sfc, high pressure will prevail. As with the previously mentioned lower dewpoints, have opted for a cooler solution for lows tonight given the dry atmosphere and a good night for radiational cooling - upper 20s to just around freezing.
342 AM CDT FRI APR 1 2016 TODAY-TONIGHT: RELATIVELY QUIET AND COOLER WEATHER TODAY. TEMPERATURES A BIGGER CHALLENGE TONIGHT AS VERY SHARP RIDGE AXIS MOVES THROUGH RELATIVELY EARLY. WITH TEMPERATURES PROBABLY FALLING TO NEAR FREEZING. WEEKEND: INCREASING RETURN FLOW/WARM AIR ADVECTION WILL RESULT IN MUCH WARMER TEMPERATURES ON BOTH DAYS. HIGHS WILL CLIMB SUBSTANTIALLY WARMER EACH DAY.
616 AM EDT FRI APR 1 2016 A COLD FRONT WILL EXIT THE AREA THIS MORNING. COLD FRONT WILL EXIT THE SOUTHEASTERN RIDGES BY MID- MORNING. AS AN UPPER LEVEL TROUGH DEEPENS ACROSS THE EASTERN U.
WITH AN UPPER TROUGH SWEEPING SOUTHEAST OVER THE PLAINS GIVING THE FINAL PUSH TONIGHT TO SEND THE FRONT SOUTH OVER THE GULF OF MEX TONIGHT. AS THE BOUNDARY GETS A STRONGER PUSH BY AN UPPER TROUGH MOVING SOUTH OVER THE PLAINS. MORE INLINE WITH THE ECMWF WITH HIGHS GENERALLY IN THE LOW 70S. AS COOLER AIR OVERSPREADS THE FA.
A COLD FRONT CONTINUES TO MAKE ITS WAY THROUGH THE CWA SLOWLY. AHEAD OF THE FRONT SOME LIGHT SHOWERS ARE STILL OCCURRING IN AN AIRMASS THAT IS RATHER MOIST WITH DEWPOINTS IN THE LOWER 70S AND TEMPERATURES IN THE LOWER 70S. SLIGHTLY COOLER THAN NORMAL TEMPERATURES WILL BE SEEN WITH HIGHS GENERALLY IN THE UPPER 60S TODAY AND MID 60S SATURDAY AND LOWS IN THE 40S.
425 AM EDT FRI APR 1 2016 A COLD FRONT WILL BRING SHOWERS AND POSSIBLE THUNDERSTORMS THROUGH THE EARLY MORNING HOURS. COLD FRONT WILL EXIT THE SOUTHEASTERN RIDGES BY MID-MORNING. AS AN UPPER LEVEL TROUGH DEEPENS ACROSS THE EASTERN U.
AN ACTIVE AND COOLER WEATHER PATTERN WILL BE IN PLACE THROUGH THE PERIOD WITH NORTHWESTERLY FLOW BRINGING A SERIES OF WAVES INTO THE AREA. THESE WAVES WILL PRODUCE CHANCES FOR OFF AND ON PRECIPITATION AS WELL AS SHOTS OF NEAR-FREEZING TO SUB-FREEZING AIR OCCASIONALLY FOR OVERNIGHT LOWS. THE STRENGTHENING LOW PRESSURE SYSTEM MENTIONED ABOVE WITH THE CLIPPER SYSTEM PUTS A VERY TIGHT GRADIENT ACROSS CENTRAL INDIANA DURING THE DAY ON SATURDAY AND MODEL SOUNDINGS INDICATE THAT GUSTS OF 40-45 KTS COULD MIX DOWN FAIRLY EASILY BUT THIS IS WINDIER THAN PREVIOUS RUNS AND THUS WILL HOLD OFF ON ANY HEADLINES. WINDS DROP OFF AS HIGH PRESSURE BUILDS OVER THE AREA. AND THINK CONSENSUS LOWS IN THE UPPER 20S TO AROUND THE FREEZING MARK ARE REASONABLE.
1243 AM CDT FRI APR 1 2016 THE COLD FRONT HAS MOVED EAST OF THE STATE AND HIGH PRESSURE IS BUILDING INTO ARKANSAS. BUT WITH THE COLD FRONT PUSHING THROUGH THE STATE. ASSOCIATED WITH A PREFRONTAL TROUGH AND ADDITIONAL LIFT OVER THE REGION. THE COLD FRONT IS SLOWLY MOVING EAST THIS AFTERNOON. TONIGHT THROUGH FRIDAY NIGHT THE SHORT TERM WILL HAVE THE PRIMARY CONVECTION TRENDS OVER SE AR WILL KEEP THE HIGHEST CHANCES OF RAIN IN THE SE.
DRY CONDITIONS WILL CONTINUE TODAY WITH RIDGING OVER THE WEST COAST.
A strong cold front will move south through the region late tonight and Friday bringing prevailing or tempo MVFR ceilings to all terminals behind this front by mid Friday morning.
426 AM EDT FRI APR 1 2016 A COLD FRONT WILL EXIT THE AREA THIS MORNING. COLD FRONT WILL EXIT THE SOUTHEASTERN RIDGES BY MID-MORNING. AS AN UPPER LEVEL TROUGH DEEPENS ACROSS THE EASTERN U.
447 AM EDT FRI APR 1 2016 A COLD FRONT WILL EXIT THE AREA THIS MORNING. COLD FRONT WILL EXIT THE SOUTHEASTERN RIDGES BY MID-MORNING. AS AN UPPER LEVEL TROUGH DEEPENS ACROSS THE EASTERN U.
OTHERWISE VFR CONDITIONS WITH SOME MID AND HIGH CLOUDS MAINLY ACROSS THE NORTHWEST WILL PREVAIL FROM 16Z THROUGH THE REST OF THE PERIOD UNDER A BUILDING RIDGE OF HIGH PRESSURE. VFR CONDITIONS ARE EXPECTED THROUGH THE REST OF THE PERIOD UNDER A BUILDING RIDGE OF HIGH PRESSURE. TONIGHT THROUGH FRIDAY COOL AND SOMEWHAT MOIST AND UNSTABLE NORTH NORTHWEST FLOW ALOFT DECREASING THROUGH THE DAY FRIDAY AS MORE STABLE AND DRY HIGH PRESSURE SLOWLY SHIFTS EAST ACROSS THE WESTERN U.
1216 AM CDT FRI APR 1 2016 A COLD FRONT HAS MOVED JUST ABOUT OUT OR NORTHWEST AND NORTH CENTRAL LOUISIANA WITH WEST TO NORTHWEST WINDS IN ITS WAKE OF AROUND 5 TO 10 KNOTS. /ISSUED 946 PM CDT THU MAR 31 2016/ COLD FRONT EXITING THE REGION THIS EVENING AS IT MOVES SOUTH INTO CENTRAL LOUISIANA.
419 AM CDT FRI APR 1 2016 CLOSED UPPER LOW TRACKING EAST ACROSS THE SOUTHWESTERN STATES WILL WEAKEN AS IT CONTINUES TO MOVE ACROSS THE SOUTHERN ROCKIES THIS MORNING. OVER THE EXTREME SOUTHWEST TEXAS PANHANDLE MAINLY THIS MORNING AS THE UPPER TROUGH TRACKS ACROSS THE FORECAST AREA. UPPER TROUGH WILL CONTINUE MOVING ACROSS WEST TEXAS AND THE PANHANDLES THIS AFTERNOON BEFORE MOVING EAST AWAY FROM THE FORECAST AREA SATURDAY. AN UPPER RIDGE WILL BUILD IN FROM THE WEST OVER THE WEEKEND.
A LITTLE WARMER ACROSS THE AREA FRIDAY BUT STILL COOL UNDER A NORTHERLY FLOW ALOFT.
A cold front have moved across the Ozarks region today ushering a cooler and drier airmass into the region. The passage of this trough will maintain intervals of clouds across the area tonight. Temperatures will fall into the 30s but readings readings are expected to stay above freezing. Expect overnight lows Friday night to fall to near or just below the freezing mark across much of the Ozark Plateau.
COOLER NORTHWEST FLOW WILL ALLOW SEVERAL UPPER LEVEL WEATHER DISTURBANCES TO PASS ACROSS CENTRAL INDIANA THROUGH THE WEEKEND. THIS WILL BRING COOLER TEMPERATURES TO THE AREA ALONG WITH LOW CHANCES FOR LIGHT RAIN SHOWERS. SMALL RAIN SHOWER CHANCES AND COOLER TEMPERATURES ARE EXPECTED TO PERSIST INTO THE NEXT WORK WEEK. THE THUNDERSTORMS HAVE MOVED SOUTHEAST OF CENTRAL INDIANA WITH THE DEPARTING COLD FRONT. OVERNIGHT LOWS COOLER THAN MOS IN THE LOWER TO MID 40S LOOK GOOD CONSIDERING COLD ADVECTION AND UPSTREAM TRAJECTORIES OVER EASTERN IOWA AND SOUTHERN WISCONSIN. IN THE WAKE OF THE PASSING COLD FRONT. UPPER RIDGING IN THE WESTERN UNITEDSTATES BEGINS TO AMPLIFY AND NW FLOW IS EXPECTED TO DEVELOP THROUGH THE UPPER MIDWEST AND INTO THE OHIO VALLEY THROUGH THE WEEKEND. WILL TREND HIGHS COOLER THAN MAVMOS GIVEN THE EXPECTED ONGOING COLD AIR ADVECTION.
101 AM EDT FRI APR 1 2016 LOW PRESSURE WILL TRACK NORTHWEST OF MAINE OVERNIGHT THROUGH FRIDAY DRAWING A WARM FRONT NORTH OF THE REGION. A COLD FRONT WILL CROSS THE REGION FRIDAY NIGHT. AREAS OF LOW PRESSURE WILL TRACK ACROSS THE REGION THROUGH THE WEEKEND. LOW PRESSURE WILL TRACK NORTHWEST OF MAINE OVERNIGHT DRAWING A WARM FRONT NORTH OF THE REGION. WITH A WEAK COLD FRONT LOCATED ACROSS THE SERN CORNER OF THE CWA. THIS FIRST COLD FRONT WILL THEN MOVE EAST OVER THE ATLANTIC BY SATURDAY MORNING. A SECOND AND STRONGER COLD FRONT WILL QUICKLY FOLLOW AND SWEEP EAST ACROSS THE NORTHEAST SATURDAY NIGHT.
404 AM MDT FRI APR 1 2016 HIGH PRESSURE WILL BE BUILDING INTO THE REGION OVER THE NEXT 24 HOURS BRINGING WARMER AND DRIER CONDITIONS. THIS ACTIVITY WILL END AROUND SUNRISE WITH MORE CONVECTIVE SHOWERS POSSIBLE THIS AFTERNOON OVER THE HIGHER PEAKS.