Aikyam-Lab/Synoptic-Bench huggingface dataset:
A WEAK COLD FRONT IS LOCATED ACROSS CENTRAL TEXAS THIS AFTERNOON. THE WEAK COLD FRONT ACROSS CENTRAL TEXAS WILL DRIFT SOUTH TONIGHT COMBINED WITH SOME UPPER LEVEL SUPPORT WILL MAINTAIN A CHANCE OF SHOWERS AND THUNDERSTORMS TONIGHT. THE REMNANTS OF THE WEAK COLD FRONT WILL PUSH OUT INTO THE NORTHWEST GULF ON THE EAST AND WILL CONTINUE TO SUPPORT CONVECTION UPSTREAM OVER THE RIO GRANDE PLAINS. LOW TEMPERATURES WILL BE IN THE LOWER TO MID 70S TONIGHT WITH LIGHT ONSHORE WINDS. BROAD HIGH PRESSURE ACROSS THE NORTHERN GULF WILL RESULT IN A WEAK PRESSURE GRADIENT ALONG THE LOWER TEXAS COAST. A WEAK COLD FRONT WILL MOVE INTO THE LOWER TEXAS COASTAL WATERS LATE TONIGHT INTO SUNDAY.
WATER VAPOR IMAGERY SHOWS SHORT WAVE TROUGH MOVING THROUGH N C TX AND W TX WHICH HAS ALREADY INITIATED CONVECTION DOWN ALONG THE RIO GRANDE. ONLY CONDITIONS THAT MAY BE KEEPING THUNDERSTORMS FROM FORMING IS SLIGHTLY LOWER MOISTURE THAN EXPECTED AND PERHAPS SOME WEAK RIDGING AT 700MB. TROUGH AXIS MAY BE ENOUGH TO WEAKEN ANY MID LEVEL RIDGING.
104 PM CDT Sat May 30 2015 /18Z TAFS/ A weak cold front has pushed through the KABI terminal this morning and will continue south across the remaining terminals this afternoon. Behind all of these thunderstorms a cold front will move into the area, bringing cooler temperatures and northerly winds. This evening into tonight, depending on where the cold front/outflow boundaries end up, there is a chance for thunderstorms to develop in our southern counties.
AHEAD OF A SURFACE FRONT CONTINUING TO ROTATE AROUND A BROAD TROUGH SLOWLY ADVANCING EAST TOWARD THE LOWER MISSISSIPPI RIVER VALLEY.
246 PM EDT SAT MAY 30 2015 THE LARGE SCALE PATTERN OVER CONUS SHOWS A TROUGH OF LOW PRESSURE OVER THE CENTRAL PORTIONS OF THE US AND TWO RIDGES OF HIGH PRESSURE, ONE OVER THE WESTERN ATLANTIC, AND A SECOND ONE OVER THE SOUTHWESTERN US.
WITH DRY WEATHER THEN EXPECTED ACROSS THE FORECAST AREA OVERNIGHT AND SUNDAY AS HIGH PRESSURE BUILDS IN FROM THE NORTH.
255 PM CDT SAT MAY 30 2015 VISIBLE SATELLITE AND SURFACE OBSERVATIONS SHOWING STRATUS/ STRATOCUMULUS CLOUD COVER ENTRENCHED ACROSS IN THE WAKE OF DEPARTING LOW PRESSURE/COLD FRONT ACROSS THE GREAT LAKES INTO CENTRAL IL. CANADIAN HIGH PRESSURE WAS CLEARING SKIES ACROSS MN INTO FAR NORTHWEST WISCONSIN. PLAN ON A CHILLY NIGHT WITH LOWS IN THE MIDDLE 30S TO THE LOWER 40S. DRY/COOL CONDITIONS PREVAIL THROUGH SUNDAY/SUNDAY NIGHT AS CORE OF THE HIGH ANCHORS ITSELF ACROSS LAKE SUPERIOR/SOUTHERN ONTARIO. LOOK FOR HIGH TEMPERATURES SUNDAY IN THE LOWER/MIDDLE 60S WITH LOWS SUNDAY NIGHT IN THE UPPER 30S TO THE MIDDLE 40S.
FOR 18Z TAFS UPPER LEVEL LOW SPINNING OVER NE AR WILL BRING SCATTERED SHRA/TSRA MAINLY TO CKV AND BNA FROM 17Z THROUGH AT LEAST 22Z.
307 PM CDT Sat May 30 2015 The cold front has made its way to the Rio Grand leaving cooler temperatures in its wake. We will get a break from the wet pattern we have been under with an upper ridge that will move east over the area.
POTENT COLD FRONT NEARING THE NM/AZ LINE EARLY THIS MORNING.
415 AM PDT FRI OCT 16 2015 A SLOW MOVING UPPER LEVEL LOW PRESSURE SYSTEM MOVING ACROSS SOUTHERN CALIFORNIA WILL BRING A CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS MAINLY FOR THE MOUNTAINS AND DESERTS.
939 AM EDT FRI OCT 16 2015 A COLD FRONT WILL CROSS THE FORECAST AREA TODAY. IN ITS WAKE HIGH PRESSURE FROM CANADA WILL BUILD ACROSS THE REGION RESULTING IN COLDER TEMPERATURES FOR THE WEEKEND. THE COLD FRONT HAS ADVANCED TO THE BLUE RIDGE SO BULK OF THE PRECIPITATION WILL BE EAST OF THE FORECAST AREA BY 2PM. CANADIAN HIGH PRESSURE WILL BE THE DOMINANT FEATURE OF OUR WEATHER PATTERN THIS PERIOD. GUSTIER WINDS FROM FRIDAY NIGHT WILL GRADUALLY DIMINISH ON SATURDAY AS THE CENTER OF HIGH PRESSURE DRIFTS OVER THE CENTRAL OHIO RIVER VALLEY.
602 AM CDT FRI OCT 16 2015 COOL HIGH PRESSURE IN CONTROL OF THE WEATHER TODAY WHICH WILL LEAD TO A MOSTLY SUNNY DAY WITH DIMINISHING WINDS. RIDGE SLOW TO MOVE OFF TO THE EAST ON SATURDAY.
A SLOW MOVING LOW PRESSURE SYSTEM WILL DRIFT THROUGH THE DESERT SOUTHWEST TODAY THROUGH THE WEEKEND.
A COLD FRONT WILL MOVE THROUGH THE AREA TONIGHT AND OFF THE COAST SATURDAY MORNING. COOLER AND DRY THIS MORNING WITH TEMPERATURES IN THE LOWER 50S TO MID 60S. LOW LEVEL RIDGING DRAPED OVER SETX THIS MORNING WILL WEAKEN AS CANADIAN HIGH DROPS SOUTH PUSHING A DRY COLD FRONT THROUGH THE AREA BETWEEN MIDNIGHT AND 9 AM SATURDAY.
1035 AM EDT FRI OCT 16 2015 THE COLD FRONT IS NOW TO THE SOUTHEAST OF THE AREA. DEWPOINTS IN KENTUCKY ARE CURRENTLY IN THE LOW TO MID 30S WITH LOW TO MID 50S ACROSS EAST TENNESSEE. WE WILL HAVE TO WATCH FOR FROST DEVELOPMENT LATER TONIGHT AS SKIES CLEAR AND COOLER AIR ARRIVES. CHATTANOOGA AIRPORT, TN 73 43 65 41 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 67 40 60 35 / 0 0 0 0 OAK RIDGE, TN 69 39 61 35 / 0 0 0 0 TRI CITIES AIRPORT, TN 65 35 58 31 / 30 0 0 0 TN.
EASTERLY LL FLOW TO CONTINUE BUT HIGH PRESSURE IN DEEP SOUTH WEAKENING AS NEXT COLD FRONT SWINGS INTO THE REGION. HIGH PRESSURE TO KEEP NORTHEAST TO EAST FLOW WILL ACROSS THE COASTAL WATERS WITH PERIODS OF EXERCISE CAUTION/ADVISORY CRITERIA THROUGH THE WEEKEND.
951 AM EDT FRI OCT 16 2015 SHOWERS CHANCES WILL INCREASE AS A COLD FRONT CROSSES THE AREA THIS EVENING. SHOWER CHANCES WILL ALSO INCREASE ESPECIALLY N OF I 80 AS THE NEXT COLD FRONT APPROACHES. WHERE THE HIGHEST POPS WERE MAINTAINED. BROAD UPPER TROUGHING. DOWNLAKE LOW-LEVEL MOISTURE PLUME WILL BECOME ENHANCED SATURDAY AS THE 700MB THERMAL TROF SWINGS OVER THE AREA AND THE AGGREGATE MOISTURE FLUX FROM THE RELATIVELY WARM LAKE WATERS INCREASES.
911 AM MDT FRI OCT 16 2015 FREEZE WARNINGS WERE ALLOWED TO EXPIRE AT 9 AM AS TEMPERATURES HAVE RISEN ABOVE FREEZING ACROSS THE REGION. IT WAS THE FIRST WIDESPREAD FREEZE OF THE AUTUMN SEASON WITH LOWS RANGING FROM THE UPPER TEENS TO THE LOWER 30S. NOT AS COLD IN MOST LOCATIONS AS THE AIRMASS CONTINUES TO SLOWLY MODERATE AFTER OUR RECENT COLD FRONTAL PASSAGE.
THE ADVERTISED COLD FRONT HAS NOW PUSHED THROUGH THE AREA. A COLD FRONT MOVED THROUGH AND IS CREATING GUSTY NORTHERLY WINDS TODAY. THE WINDS MAY NOT DECOUPLE HINDERING IDEAL RADIATIONAL COOLING BUT THE CAA WILL BE ENOUGH TO RESULT IN COOLER THAN NORMAL MORNING LOWS SATURDAY AS MOST SITES NORTH OF INTERSTATE TWENTY BOTTOM OUT IN THE 40S. THIS WILL RESULT IN COOLER THAN NORMAL AFTERNOON HIGHS WITH SITES TOPPING OUT IN THE LOWER 70S NORTH TO MID 70S SOUTH.
WE WILL SEE THE COOLEST TEMPERATURES SO FAR THIS FALL TONIGHT /UNTIL TOMORROW NIGHT WHEN IT'S EVEN COOLER/. COLD FRONT CURRENTLY MOVING THROUGH THE MID STATE WILL BRING VERY LIGHT SHOWERS/SPRINKLES INITIALLY. THEN ULTIMATELY BRING IN MUCH DRIER AND COOLER AIR.
NORTH-NORTHEASTERLY WIND SURGE EXPECTED OVER COASTAL LOCATIONS LATE MORNING SURFACE ANALYSIS DEPICTS HIGH PRESSURE (1022 MILLIBARS) CENTERED OVER OUR AREA. A COLD FRONT EXTENDS FROM THE MID ATLANTIC COAST THROUGH THE TENNESSEE AND LOWER MISSISSIPPI VALLEYS. A COLD DOME OF HIGH PRESSURE (1035 MILLIBARS) WAS BUILDING OVER THE PLAINS STATES IN THE WAKE OF THESE FRONTS. WHICH IS AMPLIFYING AN EXISTING TROUGH THAT EXTENDS FROM THE CANADIAN PRAIRIES TO THE SOUTHEAST U. A COLD FRONT WILL PUSH THROUGH SOUTHEAST GA OVERNIGHT. LOWS TONIGHT WILL RANGE FROM THE MID/UPPER 50S INLAND TO THE LOW/MID 60S AT THE COAST. HIGH PRESSURE WILL REMAIN IN PLACE OVER THE WATERS THROUGH THIS EVENING. A COLD FRONT WILL CROSS THE GEORGIA WATERS AFTER MIDNIGHT.
659 AM CDT FRI OCT 16 2015 HIGH PRESSURE BUILDS ACROSS THE UPPER MISSISSIPPI RIVER VALLEY FOR THE WEEKEND. THE HIGH WILL ALSO HELP USHER IN SOME COLDER.
REMAINDER OF FORECAST WAS IN GOOD SHAPE WITH SUNNY AND WARMER CONDITIONS EXPECTED FOR SAT. HIGH PRESSURE RIDGING HAS SETTLED ACROSS THE AREA OVERNIGHT RESULTING IN CLEAR SKIES ALONG WITH CALM TO VERY LIGHT WINDS. HIGH PRESSURE RIDGING WILL CONTINUE TO BUILD ACROSS THE FORECAST AREA TODAY AND SATURDAY. HIGHS SATURDAY WILL BE WARMER WITH READINGS IN THE MIDDLE 60S TO MIDDLE 70S.
849 AM EDT FRI OCT 16 2015 COLD FRONT WITH LIMITED MOISTURE CROSSES THIS MORNING. CANADIAN HIGH PRESSURE TAKES CHARGE THIS WEEKEND.
633 AM CDT FRI OCT 16 2015 Breezy and much cooler conditions will be noted across central Illinois today, as a strong cold front settles southward toward the Gulf Coast. Strong 1032mb Canadian high pressure will settle southeastward to near the Mississippi River tonight. excellent radiational cooling conditions will result in freezing temperatures across much of the area by dawn Saturday. Think coldest readings in the upper 20s will generally be focused along/west of the I-55 corridor where winds will be lightest, with warmest temps in the lower 30s further southeast toward the Indiana border. With freezing conditions likely. Further south where temps will hover near or slightly above freezing. High pressure will drift overhead on Saturday, providing sunny but very cool weather with highs only reaching the 50s.
A FEW LINGERING SHOWERS ARE POSSIBLE THIS MORNING AS AN UPPER LEVEL LOW SLOWLY LIFTS NORTHEASTWARD OUT OF OUR DISTRICT.
955 AM MDT FRI OCT 16 2015 AREA REMAINS UNDER THE INFLUENCE OF AN UPPER LEVEL RIDGE OF HIGH PRESSURE WITH AXIS EXTENDING NORTH THROUGH THE ROCKY MTN STATES. SOME HIGH CLOUDS ARE MOVE OVER THE THE TOP OF THE UPPER RIDGE ALONG THE US/CAD BORDER AND HAVE INCREASED CLOUD-COVER SOME FOR THESE AREAS TODAY. WITH HIGH PRESSURE ALOFT.
834 AM EDT FRI OCT 16 2015 SHOWERS CHANCES WILL INCREASE AS A COLD FRONT CROSSES THE AREA THIS EVENING. SHOWER CHANCES WILL ALSO INCREASE ESPECIALLY N OF I 80 AS THE NEXT COLD FRONT APPROACHES. WHERE THE HIGHEST POPS WERE MAINTAINED. BROAD UPPER TROUGHING. DOWNLAKE LOW-LEVEL MOISTURE PLUME WILL BECOME ENHANCED SATURDAY AS THE 700MB THERMAL TROF SWINGS OVER THE AREA AND THE AGGREGATE MOISTURE FLUX FROM THE RELATIVELY WARM LAKE WATERS INCREASES.
620 AM CDT FRI OCT 16 2015 MAIN ISSUE TO CONTEND WITH IS TEMPS OVER THE NEXT SEVERAL DAYS A GRADUAL WARMING TREND IS ON TAP LATE THIS WEEKEND IN RESPONSE TO AMPLIFIED UPPER LEVEL RIDGE. GETTING KICKED EWD AS PAC NW TROF DIGS ALONG THE WEST COAST.
1104 AM EDT FRI OCT 16 2015 SHOWERS CHANCES WILL INCREASE AS A COLD FRONT CROSSES THE AREA THIS EVENING. SHOWER CHANCES WILL ALSO INCREASE LATE N OF I 80 AS THE NEXT COLD FRONT APPROACHES. WHERE THE HIGHEST POPS WERE MAINTAINED. BROAD UPPER TROUGHING. DOWNLAKE LOW-LEVEL MOISTURE PLUME WILL BECOME ENHANCED SATURDAY AS THE 700MB THERMAL TROF SWINGS OVER THE AREA AND THE AGGREGATE MOISTURE FLUX FROM THE RELATIVELY WARM LAKE WATERS INCREASES.
With a dry cold front heading into the area, temperatures will cool fairly quickly this evening, especially in southeast Alabama and southwest Georgia.
1056 AM MDT FRI OCT 16 2015 THE PACIFIC LOW WILL MOVE OVER SOUTHERN CALIFORNIA TODAY AS A KICKER LOW PRESSURE TROUGH APPROACHES THE PACIFIC NORTHWEST COAST. SATELLITE IMAGES AND SURFACE OBSERVATIONS JUST UPSTREAM OF THE LOW INDICATE THAT PLENTY OF MOISTURE HAS BEEN ENTRAINED IN THE SOUTHERLY FLOW AHEAD OF THE DISTURBANCE ACROSS SOUTHERN CA/NV.
741 AM EDT FRI OCT 16 2015 A COLD FRONT WILL MOVE THROUGH THE REGION TODAY. A SECONDARY COLD FRONT WILL BRING MUCH COLDER AIR TO THE NORTH COUNTRY LATE TONIGHT AND EARLY SATURDAY. WITH A CHANCE OF SNOW SHOWERS LATE TONIGHT AND SATURDAY OVER THE HIGHER ELEVATIONS OF THE ADIRONDACKS AND GREEN MOUNTAINS.
RESULTING IN SHOWERS AND THUNDERSTORMS AS WELL AS COOLER TEMPERATURES. MESOSCALE ANALYSIS INDICATES AREA OF UPPER LEVEL DIFFLUENCE CURRENTLY DEVELOPING OVER THAT AREA AS A VORT LOBE ROTATES NE OUT OF THE BASE OF THE LOW OVER SOUTH CENTRAL CALIFORNIA.
AN UPPER RIDGE OVER THE AREA WILL SHIFT INLAND TODAY.
THE COLD FRONT HAS PASSED THRU OUR FORECAST AREA AND NOW SITS SE OF THE I-59/20 CORRIDOR.
1246 PM EDT FRI OCT 16 2015 A COLD FRONT WILL BRING SHOWERS TO THE REGION EARLY THIS MORNING FOLLOWED BY BREEZY AND MOSTLY CLOUDY CONDITIONS. A MORE SIGNIFICANT COLD FRONT WILL CROSS THE AREA TONIGHT BRINGING THE COLDEST AIRMASS OF THE EARLY FALL SEASON. H5 SHORT WAVE TROF AND ASSOCIATED SFC COLD FRONT IS MOVING THROUGH THE AREA EARLY THIS MORNING. MAX TEMPS THIS AFTERNOON WILL RANGE IN THE LOWER TO MIDDLE 50S. STRONG COLD AIR ADVECTION WILL LIMIT AFTERNOON MAX TEMEPRATURES TO ONLY THE LOWER OR MIDDLE 40S. HOWEVER, OVER THE FINGER LAKES WHERE THE GROWING SEASON IS STILL CONSIDERED ACTIVE, TEMPERATURES MAY BE A LITTLE WARMER DUE TO THE CLOUD COVER.
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.
759 PM EDT THU MAR 31 2016 UPDATE/AVIATION A STRONG COLD FRONT WILL BRING THE RISK OF STRONG THUNDERSTORMS INTO EARLY THIS EVENING THEN THE SHOWERS WILL END BUT SKIES WILL REMAIN MOSTLY CLOUDY AS IT BECOMES COOLER TONIGHT WITH LOWS IN THE 30S.
958 PM EDT THU MAR 31 2016 A COLD FRONT WILL CROSS THE REGION TONIGHT.
/ISSUED 710 PM CDT THU MAR 31 2016/ A BAND OF SHOWERS AND THUNDERSTORMS ALONG A COLD FRONT OVER PARTS OF DEEP EAST TEXAS AND LOWER PARTS OF NORTHWEST AND INTO NORTH CENTRAL LOUISIANA WILL BE PROVIDING GUSTY WINDS ALONG WITH MVFR/IFR CEILINGS AND REDUCED VISIBILITIES IN HEAVY SHOWERS. /ISSUED 346 PM CDT THU MAR 31 2016/ HIGHLY UNSTABLE AIRMASS INVOK COLD FRONT MOVG ACROSS AREA. THE TAIL END OF AN UPPER TROUGH COULD BRING A FEW SHOWERS MID WEEK. LONGER TERM CHANGES COULD PLAY ON THE FORM OF A DEVELOPING UPPER LOW OVER EASTERN PACIFIC OFF COAST OF BAJA.
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.
LATEST IR/WV IMAGERY SHOWS THE UPPER LOW LOCATED OVER COCHISE COUNTY AND SLOWLY DRIFTING EASTWARD. AS THE UPPER LOW MOVES EAST INTO NEW MEXICO FRIDAY. THERE WILL BE A WEAK DISTURBANCE MOVING INTO THE AREA ON THE BACKSIDE OF THE LOW IN THE NORTHERLY FLOW ALOFT.
755 PM EDT THU MAR 31 2016 A COLD FRONT WILL CROSS THE REGION TONIGHT.
COLD MID TROPOSPHERIC TROUGH EXTENDED FROM CNTRL CANADA DOWN INTO THE CNTRL PLAINS. WATER VAPOR SATELLITE LOOP AS OF EARLY THIS AFTN SHOWED A CLOSED LOW/VORT MAX DROPPING SWD ACROSS CNTRL SD. EXPECT HIGHS SUN IN THE LOWER OR MID 70S. A COLD FRONT WILL DROP DOWN INTO THE AREA FROM THE N SUN NGT AS A CLIPPER SYSTEM RACES INTO THE UPPER MIDWEST. TUE WILL TURN WARMER WITH HIGHS IN THE 60S AND BRISK SOUTH WINDS. NEXT COLD FRONT WILL PUSH IN FROM THE NW BY LATE TUE.
THE MAIN COLD FRONT APPEARS TO BE EAST OF THE MISSISSIPPI RIVER. A COLD FRONT ASSOCIATED WITH THE SYSTEM WILL SWEEP TO THE EAST.
THE SURFACE TO ROUGHLY 850MB REMAINS ABOVE FREEZING. KEPT MAINLY ALL RAIN MENTIONED AS THE BOUNDARY LAYER REMAINS ABOVE FREEZING AND THE BETTER OMEGA IS FOCUSED OVER NORTHERN IOWA. COLD FRONT WILL BE PASSING THROUGH THE DMX CWA. THE COLD SURGE BEHIND THE AFOREMENTIONED AREA OF LOW PRESSURE CONTINUES TO LOOK LESS INTENSE AS A THERMAL RIDGE BUILDING OVER THE INTERMOUNTAIN WEST LOOKS TO KEEP THE -20C 850MB TEMPS WHICH WERE FCST FOR IOWA EARLIER IN THE WEEK.
825 PM MST THU MAR 31 2016 A LOW PRESSURE SYSTEM WILL BEGIN TO EXIT THE DESERT SOUTHWEST WITH ONLY A SLIGHT CHANCE OF PRECIPITATION OVER PORTIONS OF EXTREME EASTERN ARIZONA ON FRIDAY. AS A RIDGE OF HIGH PRESSURE TAKES HOLD OVER THE WESTERN STATES. THE RELATIVELY COOL TROF OVER SOUTHEAST AZ. AND PROVIDING SOME AFTERNOON INSTABILITY SHOWERS OVER THE HIGHEST TERRAIN OF SOUTHEAST AZ.
As another upper level trough moves across Texas, showers may develop. The best rain chances are across the northwestern half of West Central Texas tomorrow, as the upper trough moves out of the Permian Basin and over West Central Texas.
1103 PM EDT THU MAR 31 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 EVENING THROUGH FRIDAY NIGHT 20Z SURFACE ANALYSIS HAD COLD FRONT WELL SOUTH/EAST OF CWA. MAINLY SNOW OVER THE HIGHER ELEVATIONS. ACCUMULATIONS MAINLY ON GRASSY AREAS IN THE HIGHER ELEVATIONS PER WEB CAMS AND AFTERNOON SOLAR INSOLATION. WHICH WILL WRAP INTO UPPER LOW SPINNING OVER EASTERN SD. UPPER RIDGE OVER THE WEST COAST WILL INCH EASTWARD WITH DRYING/SLIGHT WARM AIR ADVECTION.
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.
ANOTHER TROUGH/SURFACE COLD FRONT SWINGS THROUGH THE AREA LATER OVERNIGHT INTO FRIDAY. PLAN ON LOWS TONIGHT IN THE UPPER 20S TO THE LOWER 30S WITH HIGHS ON FRIDAY TOPPING OFF IN THE LOWER/MIDDLE 40S.
836 PM EDT THU MAR 31 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.
THE THERMAL TROUGH HAS HAS SHIFTED INLAND WHICH HAS ALLOWED TEMPERATURES TO RUN ABOUT 3-5 DEGREES WARMER THAN YESTERDAY AT THIS TIME. THE THERMAL TROUGH WILL REMAIN INLAND INTO FRIDAY WITH TEMPERATURES SIMILAR TO THURSDAY.
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.
BUT WITH A COLD START AND THE COLD AIR MASS LINGERING OVER THE EAST THEY WILL STRUGGLE TO GET MUCH ABOVE THE FREEZING MARK.
AN UPPER RIDGE BROUGHT ANOTHER WARM AND DRY TODAY ACROSS SOUTHWEST WASHINGTON AND NORTHWEST OREGON.
GKS Cold front is through east central Missouri into southwest Illinois, and should clear the CWFA by 22-23Z. Like Friday morning lows, highs Friday afternoon will be around 10 degrees cooler than today's highs. Given the NW flow, temps will be cooler anyway, but esp so across nrn portions of the CWA where the fnt will reach during max heating. Flow becomes swly at low levels with thermal ridge building into the area to warm up Sun and somewhat on Mon, before the a fairly strong cdfnt pushes thru the region bringing another shot of cold air.
1203 AM EDT FRI APR 1 2016 AVIATION A STRONG COLD FRONT WILL BRING THE RISK OF STRONG THUNDERSTORMS INTO EARLY THIS EVENING THEN THE SHOWERS WILL END BUT SKIES WILL REMAIN MOSTLY CLOUDY AS IT BECOMES COOLER TONIGHT WITH LOWS IN THE 30S.
CHATTANOOGA AIRPORT, TN 61 76 49 63 / 90 30 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 60 73 46 59 / 90 40 20 10 OAK RIDGE, TN 60 73 45 59 / 90 30 20 10 TRI CITIES AIRPORT, TN 57 72 44 58 / 90 60 20 10.
1113 PM EDT THU MAR 31 2016 HYDRO A STRONG COLD FRONT WILL BRING THE RISK OF STRONG THUNDERSTORMS INTO EARLY THIS EVENING THEN THE SHOWERS WILL END BUT SKIES WILL REMAIN MOSTLY CLOUDY AS IT BECOMES COOLER TONIGHT WITH LOWS IN THE 30S.
ADJUSTED POPS TO HIT THE HIGHER NORTH FACING SLOPES THE REST OF THE EVENING. STRONG RIDGE OVER THE PAC COAST WILL FLATTEN AS IT SHIFTS EAST OVER THE NEXT TWO DAYS.
WE THUS UTILIZED A TIME-LAGGED CONSENSUS OF THAT GUIDANCE TO FOCUS THE HIGHEST POPS OVER CENTRAL ND OVERNIGHT. A COLD FRONT. THE MAIN FEATURE IN THE EXTENDED WILL BE THE BREAK DOWN OF THE EASTERN PACIFIC RIDGE RESULTING IN A MORE PROGRESSIVE FLOW PATTERN FOR THE CENTRAL CONUS.
The initial round of thunderstorms touched off by a ripple of energy ahead of the cold front was pushing east of the forecast area as of mid afternoon. The focus then turns to the broken line of thunderstorms developing along and just ahead of the cold front across south central and southwest Illinois. Mesoscale models tend to develop this line further south as the cold front progresses east across the area. RAP13 forecast soundings also show a layer of relatively warmer air in the 900-800 mb layer. In the wake of the cold front, overall cyclonic flow aloft will persist through late week.
900 PM CDT THU MAR 31 2016 A cold front has now passed southeast of the central/SE Illinois forecast area with WNW winds and partial clearing across the area. Otherwise, much cooler tonight with lows in the lower 40s and some upper 30s in the colder air following the cold front. The departure of the cold front early this evening will signal the end of shower and thunderstorm chances in east central and southeast Illinois by 9 pm.
GUSTY SOUTHERLY SURFACE WINDS WILL CONTINUE AHEAD OF AN APPROACHING COLD FRONT THROUGH THIS EVENING. VFR CONDITIONS SHOULD RETURN AFTER 15Z, AS DRIER AIR MOVES IN BEHIND THE COLD FRONT. EXPECT VFR CONDITIONS TO PREVAIL UNTIL LATE THIS AFTERNOON, WHEN SHOWERS AND THUNDERSTORMS WILL BECOME NUMEROUS AHEAD OF AN APPROACHING COLD FRONT. AFTER 05Z EXPECT SHOWERS TO DIMINISH FROM THE WEST FOLLOWING PASSAGE OF THE COLD FRONT, WITH VFR CONDITIONS RETURNING LATE TONIGHT AND EARLY FRIDAY.
634 PM CDT THU MAR 31 2016 Cold front is through east central Missouri into southwest Illinois, and should clear the CWFA by 22-23Z. Like Friday morning lows, highs Friday afternoon will be around 10 degrees cooler than today's highs. Given the NW flow, temps will be cooler anyway, but esp so across nrn portions of the CWA where the fnt will reach during max heating. Flow becomes swly at low levels with thermal ridge building into the area to warm up Sun and somewhat on Mon, before the a fairly strong cdfnt pushes thru the region bringing another shot of cold air.
736 PM CDT THU MAR 31 2016 SCATTERED STRONG TO SEVERE SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP EAST OF AN APPROACHING COLD FRONT THAT IS STILL OVER EASTERN ARKANSAS STRETCHING SOUTHWEST INTO NORTHWESTERN LOUISIANA. SPC RUC MESOANALYSIS DEPICTS MOST OF THE LOW LEVEL HELICITY ORIENTED SOUTH OF THIS BOUNDARY. WITH THE HIGHEST CAPE STILL SOUTHWEST OF A LINE MOULTON TO CULLMAN COUNTY. A COLD FRONT ASSOCIATED WITH THE SYSTEM WILL SWEEP TO THE EAST.
SFC-LOW LEVEL FLOW VEERS MORE TO S-SSW AS SFC COLD FRONT TO THE NORTH SAGS SWD INTO SRN AL AND THE FL PANHANDLE.
A COLD FRONT. THE MAIN FEATURE IN THE EXTENDED WILL BE THE BREAK DOWN OF THE EASTERN PACIFIC RIDGE RESULTING IN A MORE PROGRESSIVE FLOW PATTERN FOR THE CENTRAL CONUS.
HELPING TO REINFORCE A LONGWAVE UPPER TROUGH ACROSS THE CENTRAL CONUS. AND ALSO BRING COOLER AIR INTO THE KANSAS REGION. THE INITIAL SURGE OF COOLER AIR WILL BRING GUSTY NORTHWESTERLY WINDS NEAR ADVISORY LEVELS TO CENTRAL KS THROUGH EARLY THIS EVENING. THE LONGWAVE UPPER TROUGH WILL SHIFT EASTWARD AWAY FROM THE CENTRAL CONUS OVER THE WEEKEND.
633 PM CDT THU MAR 31 2016 A STRONG COLD FRONT LATE THIS EVENING INTO EARLY FRIDAY MORNING WILL BRING STRONG NORTHERLY TO NORTHEASTERLY WINDS FOR MUCH OF THE OVERNIGHT HOURS. /ISSUED 426 PM CDT THU MAR 31 2016/ AN UPPER LEVEL LOW PRESSURE TROUGH IS EXPECTED TO DEEPEN SLIGHTLY WHILE MOVING INTO SOUTHWEST TEXAS EARLY FRIDAY THEN OPEN SLIGHTLY AS IT CROSSES THE TEXAS SOUTH PLAINS ON FRIDAY. A COLD FRONT MOVING SOUTHWARD OVERNIGHT WILL ALSO ADD LIFT AND INCREASING POST-FRONTAL MOISTURE.