Aikyam-Lab/Synoptic-Bench huggingface dataset:
SLIGHTLY COOLER AIR WILL MOVE IN BEHIND THE AFOREMENTIONED FRONT ON SUNDAY. WITH HIGHS IN THE LOWER 50S NORTH TO THE LOWER 60S SOUTH. MODELS DO AGREE ON SLIGHTLY COOLER TEMPERATURES /AT LEAST AS COMPARED TO THE TEMPERATURES OF LATE MARCH/ BUT STILL ABOVE NORMAL FOR THIS TIME OF THE YEAR.
450 AM EDT SAT APR 4 2015 HIGH PRESSURE WILL MOVE ACROSS THE REGION TODAY AND CONTINUE TO EXTEND INTO THE AREA ON SUNDAY.
415 AM EDT SAT APR 4 2015 COOLER TODAY AND TONIGHT WITH HIGH PRESSURE BUILDING IN. COLD FRONT HAS PUSHED E OUT OF THE CWA AS OF 06Z. THINK THERE WILL BE A GOOD RIDGE VALLEY SPLIT AS THE HILLS HOLD ON TO SOME PUFF UNTIL VERY LATE. THINK OUTLYING AREAS GET BELOW FREEZING IN THE LOWLANDS. A HIGH PRESSURE SYSTEM WILL PROVIDE DRY WEATHER FOR EASTER. AS THE HIGH SLIDES EASTWARD. A SOUTHERLY WIND FLOW BRINGS MOISTURE AND WARMER AIR NORTHWARD FOR THE BEGINNING OF THE WORK WEEK. VFR CONDITIONS TONIGHT WITH RIDGE/VALLEY SPLIT ON THE SURFACE WINDS.
H7 TEMPS ARE PROGGED TO CLIMB BACK ABOVE FREEZING VIA WESTERLY LLVL DOWNSLOPE. PROMOTING HIGHS IN THE LOW TO MID 60S. DEWPOINTS ARE CURRENTLY IN THE LOW TEENS AND WILL PROBABLY ONLY GET LOWER WITH THE ONSET OF DIURNAL MIXING AFTER SUNRISE. NOT ONLY COULD THIS KEEP TEMPERATURES A LITTLE COOLER. WARMING TREND CONTINUES ON SUN WITH BROAD UPPER-LEVEL RIDGING IN CONTROL OVER THE CENTRAL ROCKIES AND ADJACENT PLAINS. THE GFS SHOWS THE BEST PRESSURE FALLS SPREADING ACROSS CENTRAL WY ON SUN AFTERNOON WITH A DEVELOPING LEE TROUGH.
SEVERAL MINOR CHANGES TO THE SHORT TERM FORECAST PERIOD THIS MORNING AS THE PATTERN TRANSITIONS FROM WARM AND DRY TO COOLER AND POSSIBLY WETTER WEATHER. RIDGING SHOULD ALLOW TEMPS TO CLIMB TO AROUND 60 IN MOST AREAS. DRY AIR DOES REMAIN IN PLACE UNDER THIS RIDGE. AND EASTERLY FLOW SHOULD KEEP TEMPS COOLER ON SUNDAY.
HOWEVER THERE COULD BE A FEW READINGS OF FREEZING TEMPERATURES IN THE NORTHEAST MOUNTAINS.
THIS EVENING THROUGH SATURDAY NIGHT WATER VAPOR IMAGERY SHOWS A SHALLOW TROUGH QUICKLY CROSSING THE MIDWEST INTO THE NRN PLAINS. LOW AMPLITUDE RIDGING WILL BRING QUIET WEATHER TO THE AREA SATURDAY.
COOLER AND DRIER AIR WILL CONTINUE TO MOVE INTO THE MID STATE TODAY. HIGH PRESSURE WILL BE DIRECTLY OVER THE AREA BY THIS EVENING. WITH SOME AREAS EAST OF I 65 TOUCHING FREEZING BY DAYBREAK EASTER SUNDAY. A FREEZE WARNING WILL BE IN EFFECT EAST OF I 65 FOR TEMPERATURES BRIEFLY REACHING FREEZING IN VALLEYS AND SHELTERED LOCATIONS. THE HIGH PRESSURE CENTER WILL MOVE OFF TO THE EAST ON SUNDAY.
259 AM MDT SAT APR 4 2015 A RIDGE WILL BE OVER THE ROCKIES TODAY AND SHIFT EAST INTO THE PLAINS SUNDAY.
315 AM PDT SAT APR 4 2015 HIGH PRESSURE WILL REMAIN OVER THE REGION TODAY ALLOWING FOR SLIGHTLY ABOVE NORMAL TEMPERATURES. A WEAK LOW PRESSURE SYSTEM WILL MOVE INTO THE AREA ON SUNDAY BRINGING COOLER AND UNSETTLED WEATHER WITH INCREASED CHANCES FOR MOUNTAIN SHOWERS.
00Z GFS/ECMWF/NAM INDICATE ATMOSPHERE COLUMN WILL BE BELOW FREEZING PER BUFKIT SOUNDINGS ACROSS PORTIONS OF NORTH CENTRAL WISCONSIN AFTER 03Z TO CHANGE PRECIPITATION OVER TO A WINTRY MIX AND POSSIBLY ACCUMULATE UP TO AN INCH OF SNOW ACROSS NORTH CENTRAL WISCONSIN.
1038 PM PDT FRI APR 3 2015 A cold front will pass through the region tonight bringing a chance of showers.
359 AM EDT SAT APR 4 2015 HIGH PRESSURE OVER THE UPPER MIDWEST WILL MOVE SOUTHEAST ACROSS THE AREA TODAY AND TONIGHT PROVIDING MOSTLY CLEAR SKIES AND DRY CONDITIONS. HIGHS TODAY WILL RANGE FROM THE UPPER 40S ACROSS MICHIGAN TO THE LOWER TO MIDDLE 50S ELSEWHERE. HIGH PRESSURE IS BUILDING INTO THE AREA FROM THE WEST AND HAS CLEARED OUT SKIES QUICKLY TONIGHT.
HIGH PRESSURE BUILDING INTO THE REGION THIS MORNING AND SKIES HAVE CLEARED OUT FOR THE MOST PART. A COOL BUT PLEASANT DAY ON TAP WITH A NORTH BREEZE AND HIGHS IN THE LOWER TO MID 60S. HIGH PRESSURE WILL PREVAIL OVERNIGHT WITH CLEAR SKIES AND LIGHT WINDS.
THE HIGH PRESSURE IN NORTHERN CANADA WILL SHIFT INTO SOUTHERN CANADA. A LOW PRESSURE SYSTEM WILL SET UP IN EASTERN WYOMING. BUT IT WILL BE COLDER OVER THE NORTH IN THE MUCH CLEARER AREAS NEAR THE CANADIAN HIGH PRESSURE. OVERNIGHT LOWS SHOULD RANGE FROM THE LOWER TEENS OVER THE NORTH TO THE MIDDLE 20S OVER THE SOUTH. COOL NORTHERLY FLOW FROM ONTARIO AND NE FLOW OFF OF LAKE SUPERIOR SHOULD KEEP THE NORTHLAND A BIT COOLER THAN SATURDAY.
IFR CEILINGS ARE QUICKLY FILLING IN AHEAD OF A COLD FRONT THIS MORNING. THE UPPER LEVELS FEATURE NEARLY ZONAL FLOW LOCALLY BETWEEN A RIDGE TO OUR SOUTH AND A TROUGH TO OUR NORTH. WITH ESSENTIALLY ALL UPPER-LEVEL SYNOPTIC SUPPORT TO OUR NORTH, THE LINE OF SHOWERS AND ISOLATED THUNDERSTORMS MOVING THROUGH THE SOUTHEAST THIS MORNING IS BEING FORCED IN THE LOW LEVELS ALONG THE COLD FRONT.
COLD FRONT HAS CLEARED THE AREA AND IS NOW ACROSS SOUTH TEXAS. BETTER RAIN CHANCE WILL LAST OVERNIGHT INTO THE FIRST PART OF SUNDAY AS THE LOW LEVEL JET INCREASES.
425 AM EDT SAT APR 4 2015 THE COLD FRONT WHICH PRODUCED THE HEAVY RAINS OVER THE LAST 24 HOURS HAS NOW EXITED EAST OF THE STATE. A STRONG SURGE OF DRIER AND COOLER AIR IS MOVING INTO THE REGION UNDER NW FLOW. THIS CLEARING WILL CONTINUE TO MAKE ITS WAY EASTWARD AS WE HEAD INTO THE MORNING HOURS AND THE CENTER OF HIGH PRESSURE EDGES EASTWARD ACROSS THE STATE. EXPECT TEMPERATURES TO BE A BIT COOLER DURING THE DAY UNDER THIS NW FLOW. THE HIGH PRESSURE WILL BE POSITIONED OVER EASTERN KY. TEMPERATURES WILL DROP TO AROUND FREEZING IN MANY LOCATIONS. AS THE HIGH SHIFTS TO THE EAST. A LOW PRESSURE SYSTEM BREWING SEVERAL STATES TO THE WEST ON SUNDAY AFTERNOON WILL START ITS TREK EASTWARD TOWARDS THE MISSISSIPPI RIVER VALLEY.
WITH UPPER- LEVEL TROUGH FROM WESTERN ONT THROUGH THE WESTERN GREAT LAKES. AND WEAK UPPER-LEVEL RIDGE OVER THE ROCKIES.
425 AM CDT SAT APR 4 2015 SURFACE RIDGING CENTERED OVER NW OKLAHOMA CONTINUES TO FEED DRIER DEWPOINTS INTO THE REGION EARLY THIS MORNING ON LIGHT NE WINDS. THIS DRY AIR WILL BE SENT PACKING NORTH BY TONIGHT AS AN AGGRESSIVE PUSH OF RETURN FLOW ENSUES BEHIND THE HIGH.
645 AM EDT SAT APR 4 2015 COOLER TODAY AND TONIGHT WITH HIGH PRESSURE BUILDING IN. COLD FRONT HAS PUSHED E OUT OF THE CWA AS OF 06Z. THINK THERE WILL BE A GOOD RIDGE VALLEY SPLIT AS THE HILLS HOLD ON TO SOME PUFF UNTIL VERY LATE. THINK OUTLYING AREAS GET BELOW FREEZING IN THE LOWLANDS. A HIGH PRESSURE SYSTEM WILL PROVIDE DRY WEATHER FOR EASTER. AS THE HIGH SLIDES EASTWARD. A SOUTHERLY WIND FLOW BRINGS MOISTURE AND WARMER AIR NORTHWARD FOR THE BEGINNING OF THE WORK WEEK. VFR CONDITIONS TONIGHT WITH RIDGE/VALLEY SPLIT ON THE SURFACE WINDS.
1234 AM CDT SAT APR 4 2015 COLD FRONT HAS PUSHED SOUTH OF THE STATE WITH VFR CONDITIONS NOW SEEN AT ALL TAF SITES. HIGH PRESSURE WILL BUILD INTO THE REGION WITH NORTHERN WINDS SHIFTING TO EASTERLY WINDS AT ALL BUT KPBF AND KLLQ BY 00Z. TONIGHT THROUGH SUNDAY NIGHT COLD FRONT IS NOW THROUGH THE NORTHWEST HALF OF THE FORECAST AREA. RETURN FLOW AROUND HIGH PRESSURE MOVING EAST WILL PROMOTE RAINFALL LATE IN THE PERIOD.
THE COLD FRONT CURRENTLY EXTENDS FROM NEAR CORPUS CHRISTI TO NORTH OF KINGSVILLE TO HEBBRONVILE AND APPROACHING ZAPATA. TEMPERATURES THIS AFTERNOON WILL RANGE FROM THE UPPER 60S TO AROUND 70 ACROSS THE RIO GRANDE VALLEY TO THE LOWER 60S ACROSS THE WEST AND THE NORTHERN RANCHLANDS. A WARM FRONT MOVES ACROSS DEEP SOUTH TEXAS ON SUNDAY WITH SOUTHERLY FLOW BEING REESTABLISHING BY SUNRISE SUNDAY. LOW TEMPERATURES TONIGHT WILL OCCUR AROUND MIDNIGHT THEN STEADY RISE AS THE WARM FRONT ADVANCES NORTHWARD.
318 AM EDT SAT APR 4 2015 LOW PRESSURE WILL INTENSIFY RAPIDLY IN THE GULF OF MAINE AND HEAD NORTHEAST TOWARDS NOVA SCOTIA TODAY. THE SURFACE COLD FRONT EXTENDED FROM SOUTHERN NEW ENGLAND THROUGH THE GULF OF MAINE. THE REAL QUESTION WILL BE CAN THE COLUMN COOL QUICK ENOUGH ACROSS NORTHERN SECTIONS OF NEW HAMPSHIRE AND WESTERN MAINE FOR A TRANSITION TO ACCUMULATING SNOW BEFORE PRECIPITATION WINDS DOWN LATER TODAY? I LEFT THE CURRENT WINTER WEATHER ADVISORY IN PLACE WITH THE IDEA WE'LL SEE ADVISORY THRESHOLD FOR SNOW ACROSS THE HIGHER TERRAIN. A SECOND COLD FRONT WILL BRING A FEW CLOUDS AND SNOW SHOWERS TO THE AREA ALONG WITH A REINFORCING SHOT OF COLD AIR.
656 AM EDT SAT APR 4 2015 HIGH PRESSURE OVER THE UPPER MIDWEST WILL MOVE SOUTHEAST ACROSS THE AREA TODAY AND TONIGHT PROVIDING MOSTLY CLEAR SKIES AND DRY CONDITIONS. HIGHS TODAY WILL RANGE FROM THE UPPER 40S ACROSS MICHIGAN TO THE LOWER TO MIDDLE 50S ELSEWHERE. HIGH PRESSURE IS BUILDING INTO THE AREA FROM THE WEST AND HAS CLEARED OUT SKIES QUICKLY TONIGHT.
1228 AM CDT SAT APR 4 2015 MAIN FORECAST CHALLENGE IS WINDS ON SATURDAY AS DRIER AIR AND WARMER TEMPERATURES RETURN. HEIGHTS FALL DURING THE DAY AND THE H85 THERMAL RIDGE EXTENDS NORTHEAST THAT WILL LEAD TO TEMPERATURES BACK INTO THE MID TO UPPER 60S FOR AFTERNOON HIGHS.
BETWEEN A MID-LEVEL SUBTROPICAL RIDGE CENTERED NEAR THE EAST COAST OF MEXICO AND A COLD UPPER LOW SPREADING EASTWARD ACROSS THE SOUTHERN PORTION OF HUDSON BAY. A RIDGE WILL SHIFT EASTWARD FROM THE OZARKS INTO KY/TN. AS CENTER OF SURFACE ANTICYCLONE TRACKS EASTWARD OVER THE SOUTHERN APPALACHIANS AND INTO THE PIEDMONT OF VA/NC. AND FOR DEVELOPMENT OF PATCHY FROST ACROSS SOUTHERN TN/NORTHEAST AL -- WHERE TEMPERATURES WILL FALL INTO THE LOWER/MID 30S WITH LOW DEWPOINT DEPRESSIONS. AS THE SUBTROPICAL RIDGE BUILDS EASTWARD OVER THE SOUTHERN GULF OF MEXICO AND AN UPPER LOW -- CURRENTLY OFF THE COAST OF BRITISH COLUMBIA -- DIGS SOUTHWARD INTO THE PACIFIC WATERS WEST OF WA/OR.
FLAT RIDGING ALOFT WILL SHIFT EAST INTO THE CENTRAL PLAINS THIS AFTERNOON WITH INCREASING SOUTHWESTERLY FLOW SPREADING ACROSS THE REGION. MIXING WILL PROMOTE DRYING AND WARMER AIR OVER SOUTHERN COLORADO ALONG WITH GUSTY WINDS.
240 AM EDT SAT APR 4 2015 COOLER TODAY AND TONIGHT WITH HIGH PRESSURE BUILDING IN. COLD FRONT HAS PUSHED E OUT OF THE CWA AS OF 06Z. THINK THERE WILL BE A GOOD RIDGE VALLEY SPLIT AS THE HILLS HOLD ON TO SOME PUFF UNTIL VERY LATE. THINK OUTLYING AREAS GET BELOW FREEZING IN THE LOWLANDS. HIGH PRESSURE CONTINUES TO BUILD IN SATURDAY NIGHT AND SUNDAY. A COUPLE OF IMPULSES WILL PASS WELL TO THE NORTH SUNDAY AFTERNOON FROM A WARM FRONT THAT WILL EXTEND FROM CO/NE TO THE GREAT LAKES.
THE MID/UPPER LEVEL PATTERN THIS MORNING CONSISTED OF A RIDGE CENTERED OVER MEXICO STRETCHING EAST AND NORTHEAST ACROSS THE GULF AND FLORIDA. AN AREA OF LOW PRESSURE WAS STRENGTHENING ACROSS THE NORTHEAST. WITH A TRAILING COLD FRONT ACROSS THE SOUTHEAST STATES. HIGH PRESSURE OVER THE WESTERN ATLANTIC WAS WEAKENING AND SHIFTING EAST IN RESPONSE TO THE AREA OF LOW PRESSURE. THE RIDGE AXIS REMAINED ACROSS CENTRAL FLORIDA. THE COLD FRONT WILL PUSH INTO NORTHERN FLORIDA TODAY. AND WINDS WILL RELAX AS HIGH PRESSURE BREAKS DOWN AHEAD OF THE FRONT. THE PRESSURE GRADIENT WILL INCREASE AS HIGH PRESSURE BUILDS BACK OVER THE WESTERN ATLANTIC.
111 AM EDT SAT APR 4 2015 A LARGE AREA OF HIGH PRESSURE WILL BRING DRY WEATHER SATURDAY AND SUNDAY. A PERIOD OF TRANQUIL WEATHER IS ANTICIPATED FOR SATURDAY AND SUNDAY WHEN A BROAD AREA OF HIGH PRESSURE AND A DRY AIRMASS ARE FORECAST TO PUSH THROUGH THE TENNESSEE AND OHIO VALLEYS. TEMPERATURES WILL INCREASE FROM SATURDAY TO SUNDAY AS WARM ADVECTION OCCURS WHEN WINDS AROUND THE HIGH BACK FROM WEST TO SOUTHWEST. HIGHS SATURDAY ARE EXPECTED TO BE IN THE LOWER 50S. INCREASING TO THE LOWER AND MIDDLE 60S FOR SUNDAY.
THIS WILL ALLOW FOR HIGHS TOO RISE INTO THE LOWER TO MID 60S ACROSS NERN CO. FLAT RIDGE ALOFT OVER COLORADO WITH A DRY W-SW FLOW ALOFT.
104 PM EST WED JAN 21 2015 LOW PRESSURE WILL AFFECT THE MID-ATLANTIC TODAY.
High pressure along the coast is shifting inland today. Upper level ridge anomalies looking increasingly strong for this weekend.
AND A WEAK SURFACE COLD FRONT WILL DROP SOUTH ACROSS KY. THE LOW CLOUD CURRENTLY EXTENDING FROM IA INTO IN WILL SPREAD SOUTHEAST. A SMALL RIDGE VALLEY TEMPERATURE SPLIT WILL DEVELOP EARLY TONIGHT. FOR THURSDAY NIGHT WILL AGAIN GO WITH A VERY MINIMUM RIDGE VALLEY TEMPERATURE SPLIT. A COLD FRONT WILL PASS THROUGH EASTERN KY TONIGHT.
SHOWERS REMAIN POSSIBLE THIS AFTERNOON AS UPPER LEVEL JET MOVES OVERHEAD AND MID LEVEL TROUGH APPROACHES.
An upper level trough will dig into the southern Rockies and southern High Plains today and tonight where a winter storm will take shape.
NO CHANCES FOR PRECIPITATION THURSDAY UNDER THE INFLUENCE OF UPPER LEVEL RIDGING.
High pressure will stay in control of our weather and a dry northwest flow.
1201 PM EST WED JAN 21 2015 HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND TONIGHT. LOW PRESSURE WILL PASS OUT TO SEA SOUTH OF NEW ENGLAND LATE TONIGHT INTO THURSDAY.
This trough will not only move through the area dry tonight. The push of cooler air associated with it and a period of frontogenetical lift late tonight and early Thursday morning will support some lower clouds moving southeast across the cwa later tonight. Despite the afternoon, sunshine still expect highs Thursday to be 5 to 10 degrees cooler than today with highs mainly in the 40 to 43 degree range north to south. An upper level trough will move across Texas Thursday night with the trough axis extending northeast across eastern Kansas into Illinois.
HIGH PRESSURE WILL BUILD EAST INTO OUR REGION THROUGH THURSDAY AND SETTLE OVERHEAD THURSDAY NIGHT. A LOW PRESSURE SYSTEM WILL TRACK UP THE SOUTHEAST U.
WE WILL SEE INCREASING HIGH AND MIDLEVEL CLOUDS THROUGH THE DAY TOMORROW AS A LOW PRESSURE SYSTEM MOVES EAST ACROSS TEXAS.
AND A WEAK SURFACE COLD FRONT WILL DROP SOUTH ACROSS KY. THE LOW CLOUD CURRENTLY EXTENDING FROM IA INTO IN WILL SPREAD SOUTHEAST. A SMALL RIDGE VALLEY TEMPERATURE SPLIT WILL DEVELOP EARLY TONIGHT. FOR THURSDAY NIGHT WILL AGAIN GO WITH A VERY MINIMUM RIDGE VALLEY TEMPERATURE SPLIT.
AN UPPER LEVEL RIDGE OVER WESTERN WASHINGTON THIS MORNING WILL DEPART INTO EASTERN WASHINGTON THIS AFTERNOON. AN APPROACHING WARM FRONT WILL CAUSE CLOUDS TO INCREASE TODAY.
MODERATE THREAT OF VALLEY FREEZING RAIN FOR NORTHWEST MONTANA A high pressure ridge building over the region has lead to a sunny, cool day for many valley locations. As the ridge continues to build tonight, valley inversions and subsequent fog redevelopment looks likely. This will lead to enhanced chances for light snow in the high elevations, while most valley locations will only notice cloudier skies.
HIGH PRESSURE OVER THE REGION WILL MAINTAIN DRY WEATHER CONDITIONS THROUGH THE WEEKEND. AN UPPER RIDGE AXIS WILL SHIFT EASTWARD TONIGHT. A WEAK MID LEVEL SHORT WAVE TROUGH WILL MOVE ACROSS THE AREA TONIGHT AND GENERATE CONSIDERABLE HIGH AND MID CLOUDS. RIDGE ALOFT WILL SPRING BACK ON THU AS THE S/W TROUGH HEADS OFF TO THE SE. GFS AND ECMWF CONTINUE TO SHOW HIGH LEVEL RH SPILLING OVER THE RIDGE FROM TIME TO TIME ON FRI.
AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL SHIFT EAST ACROSS THE PACIFIC NORTHWEST TODAY. THUS LOW CLOUDS AND AREAS OF FREEZING FOG ARE OCCURRING BELOW THESE ELEVATIONS. WILL ALLOW THE CURRENT FREEZING FOG ADVISORIES TO CONTINUE, AND WILL REEVALUATE THEM TOWARDS 11 AM PST. HIGH TEMPS WILL BE COOL WITHIN THE AREA AFFECTED BY THE LOW CLOUDS AND FOG, AND HAVE NUDGED SOME HIGH TEMPS DOWN. HIGH TEMPS IN CENTRAL OREGON AND ALONG THE I-90 CORRIDOR IN KITTITAS COUNTY WILL BE VERY TRICKY AND MAY HAVE TO RAISE THE HIGH TEMPS DEPENDING ON THE AMOUNT OF CLEARING. AN UPPER LEVEL HIGH WILL BE BUILDING OFF THE CALIFORNIA COAST WITH THE RIDGE PUSHING UP INTO OUR CWA.
157 PM MST WED JAN 21 2015 WATER VAPOR AND UPPER AIR ANALYSIS INDICATE A PAIR OF UPPER LEVEL TROUGHS OVER THE WESTERN CONUS. THE NORTHERN TROUGH HAS BEEN SLIDING SOUTHWARD TOWARD THE STRONGER ONE OVER SOUTHERN CALIFORNIA. AHEAD OF THESE TWO TROUGHS. UPPER LEVEL MOISTURE HAS BEEN POOLING OVER THE SOUTHERN ROCKIES AND ONTO THE HIGH PLAINS. MEANWHILE SNOWFALL HAS DEVELOPED OVER THE LEE OF THE ROCKIES AHEAD OF THESE TROUGHS. TONIGHT DRIER AIR WILL MOVE IN FROM THE NORTH THROUGH THE NIGHT WITH A 500MB TROUGH THAT WILL ACCOMPANY THE NORTHERN TROUGH AS IT CONTINUES SOUTHWARD. THERE MAY BE SOME LIGHT SNOW OVER THE FAR SOUTH DUE TO SOME LINGERING LIFT AHEAD OF THE 500MB TROUGH. THURSDAY WILL BE CLEAR WITH LIGHT WINDS AS A 850MB RIDGE MOVES OVERHEAD. TEMPERATURES WILL BE AT OR SLIGHTLY WARMER THAN TODAY.
MOSTLY SUNNY SKIES WILL PREVAIL TODAY ACROSS THE ARKLAMISS AS HIGH PRESSURE REMAINS IN CONTROL. HIGH PRESSURE RIDGING IS RE-ESTABLISHING ITSELF OVER THE REGION TODAY AND WITH NORTHERLY FLOW TEMPERATURES WILL BE A LITTLE COOLER THAN PREVIOUS DAYS. BUT CLOUDS WILL BE ON THE INCREASE OUT AHEAD OF AN UPPER LOW THAT WILL DEEPEN OVER THE FOUR CORNERS REGION AND SWING ACROSS NEW MEXICO INTO TEXAS ON THURSDAY.
1122 AM CST WED JAN 21 2015 FOR 18Z TAFS /ISSUED 1004 AM CST WED JAN 21 2015/ PREVIOUSLY FORECAST COLD FRONT HAS MOVED WELL SOUTH AND EAST OF THE FORECAST AREA THIS MORNING WITH LIGHT N-NW WINDS IN ITS WAKE. HIGH PRESSURE AT THE SURFACE WILL CONTINUE TO NOSE ITS WAY IN FROM THE NW AND KEEP THE AREA DRY.
331 PM EST WED JAN 21 2015 A WEAK AREA OF LOW PRESSURE ACROSS EASTERN NORTH CAROLINA WILL LIFT NORTHEAST AWAY FROM THE AREA THIS EVENING.
TEMPERATURES WILL HOVER AROUND TO JUST BELOW FREEZING FOR THIS ENTIRE EVENT. SNOW RATIOS SHOULD BE ON THE LOW SIDE COMPARED TO NORMAL.
THE COLD FRONT THAT MOVED INTO THE NORTHERN GULF THIS MORNING HAS STALLED. A DEEPENING UPPER DISTURBANCE IS MOVING EAST BOUND ACROSS THE 4 CORNERS REGION WITH LIFT AHEAD OF THE SYSTEM ALLOWING A LOW PRESSURE SYSTEM TO FORM ALONG THE STALLED FRONTAL BOUNDARY IN NE MEXICO.
A weak cold front extending from far southeast GA across the FL panhandle will sag through the area today and this evening. Temperatures will be mild with lows in the mid 40s, as a low pressure system begins to take shape along the TX/MEX border.
ISSUED BY NATIONAL WEATHER SERVICE MEMPHIS TN 1111 AM CST WED JAN 21 2015 HIGH PRESSURE IS MOVING INTO THE AREA. CEILINGS WILL GRADUALLY LOWER OVERNIGHT AS CLOUDS INCREASE AS A LOW DEVELOPS OVER THE WESTERN GULF COAST WITH AN APPROACHING UPPER LOW.
109 PM EST WED JAN 21 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION THROUGH TODAY.
WHILE A TROUGH STARTS TO SWING TOWARDS THE WESTERN GULF OF MEXICO.
HIGH PRESSURE ALOFT WILL EXPAND ACROSS THE WESTERN STATES THROUGH THE LATTER HALF OF THE WEEK. THE DEFORMATION AND OVERRUNNING ALONG THE NORTH SIDE OF THE AZ UPPER LOW HAVE SHIFTED OUT OF THE CWA AT THIS TIME AND THE PRECIP THREAT ACROSS THE SOUTHERN CWA FROM THIS HAS ENDED. THIS LOW LEVEL COLD ADVECTION HAS ALSO TIGHTENED THE NORTHERLY SURFACE PRESSURE GRADIENT ACROSS THE CWA PARTICULARLY OVER THE SOUTH. THE LOW LEVEL COOLING SHOULD ALSO KEEP THE AIR QUALITY FROM DETERIORATING TODAY ALTHO EXPECT STAGNANT CONDITIONS TO DEVELOP TOMORROW AND THE WEAK SPLITTING WAVE THAT CROSSES THE REGION FROM THE NORTH FRI WILL HAVE LITTLE IMPACT.
400 PM EST WED JAN 21 2015 LOW PRESSURE OFF THE NORTH CAROLINA COAST WILL SLOWLY TRACK NORTHEAST OFF THE VIRGINIA CAPES THIS EVENING.
WARM ADVECTION HAS DEVELOPED ABOVE THE COLD FRONT CURRENTLY LOCATED ALONG AN EL INDIO TO PLEASANTON TO COLUMBUS LINE. UPPER AIR ANALYSIS LAST EVENING SHOWED A BROAD SHALLOW TROUGH OVER THE EASTERN HALF OF THE COUNTRY WITH WEST-NORTHWESTERLY FLOW OVER TEXAS. A WEAK RIDGE WAS OVER THE SOUTHWEST WITH A SHARPER TROUGH ALONG THE WEST COAST. AT THE SURFACE A COLD FRONT HAS MOVED THROUGH MOST OF OUR CWA AND STRETCHES FROM GONZALES TO PLEASANTON TO EL INDIO. FOR THE REST OF THIS PERIOD THE WEST COAST TROUGH WILL MOVE THROUGH THE SOUTHWEST AND THE UPPER FLOW OVER US WILL TURN FROM WESTERLY TO SOUTHWESTERLY. LOW LEVEL MOISTURE WILL INCREASE BEFORE THE FRONT AND UPPER TROUGH GET HERE AND EXPECT A GOOD SOAKING RAIN FOR THE EASTERN HALF OF THE AREA.
444 PM EST WED JAN 21 2015 A WEAK AREA OF LOW PRESSURE ACROSS EASTERN NORTH CAROLINA WILL LIFT NORTHEAST AWAY FROM THE AREA THIS EVENING.
HIGH PRESSURE SETTLES IN BRIEFLY FOR THE END OF THE WEEK.
333 PM CST WED JAN 21 2015 A WEAK TROF OF LOW PRESSURE BROUGHT A NARROW BAND OF LIGHT SNOW SHOWERS. BRACKETED BY AREAS OF FREEZING DRIZZLE. THE BAND OF SNOW SHOWERS AND PATCHY FREEZING DRIZZLE WILL AFFECT PORTIONS OF PINE COUNTY AND NORTHWEST WISCONSIN THIS EVENING. THE FREEZING DRIZZLE MAY RESULT IN SLIPPERY SIDEWALKS AND MINOR ICE ACCRETION ON WINDSHIELDS. A NARROW RIDGE WILL TRANSLATE SOUTHEAST ACROSS THE FORECAST AREA.
AN INCREASE IN MOISTURE WILL OCCUR THURSDAY WELL AHEAD OF LOW PRESSURE DEVELOPING NEAR THE TEXAS GULF COAST.
CLOUDS WILL BE ON THE INCREASE TONIGHT OUT AHEAD OF AN APPROACHING LOW PRESSURE SYSTEM THAT WILL DEEPEN OVER THE FOUR CORNERS REGION AND SWING ACROSS NEW MEXICO INTO TEXAS ON THURSDAY.
TODAY THROUGH THURSDAY NIGHT CURRENT SURFACE MAP SHOWS COLD FRONT FROM EASTERN MONTANA INTO NORTHEAST SOUTH DAKOTA. IN REPOSE TO UPPER TROF DROPPING SOUTHWARD THROUGH THE DAKOTAS. COLD FRONT WILL SLOWLY BACK INTO WESTERN SOUTH DAKOTA TODAY.
THE LOWER AMOUNTS WILL BE FOUND ON THE NORTHEAST PART OF THE AREA, WHILE THE HEAVIEST AMOUNTS WILL BE TOWARDS MORTON COUNTY. HIGH TEMPERATURES WILL BE AROUND 40 BUT COOLER OVER SNOW COVERED AREAS ACROSS FAR SOUTHWEST KANSAS IN THE LOW TO MID 30S.
314 PM EST WED JAN 21 2015 A LARGE AREA OF HIGH PRESSURE OVER EASTERN CANADA AND THE NORTHEAST PLENTY OF SUNSHINE. A LOW PRESSURE SYSTEM WILL PASS TO OUR SOUTH ON THURSDAY WITH ONLY CLOUDS EXPECTED AND TEMPERATURES A FEW DEGREES BELOW SEASONAL NORMALS.
1201 PM CST WED JAN 21 2015 SNOW WILL GRADUALLY TAPER OFF TODAY AS SUBSIDENCE AND HIGH PRESSURE BUILDS IN LATER TONIGHT. WHILE AN UPPER LEVEL RIDGE BREAK OVERHEAD. THE UNCERTAINTY IN THE TIMING/AMOUNT OF CLEARING YIELDS LITTLE CONFIDENCE IN THE LOW TEMPERATURES. THE LARGE SCALE PATTERN WILL FEATURE UPPER RIDGING NOSING INTO THE PACIFIC NORTHWEST.
HIGH PRESSURE WILL BUILD INTO THE FORECAST AREA TONIGHT AND THURSDAY.
923 AM MST Wed Jan 21 2015 A ridge of high pressure aloft currently centered just inland of the West Coast will gradually shift east today, maintaining a dry and stable northerly flow aloft over the region through tonight. High pressure will continue to build aloft causing skies to clear from north to south this morning.
RAIN CHANCES ARE ENHANCED ON THURSDAY AS A COASTAL TROUGH DEVELOPS IN ADVANCE OF AN APPROACHING UPPER LEVEL STORM SYSTEM.
THE MAJORITY OF THURSDAY SHOULD BE DRY WITH TEMPERATURES AT LEAST 10 DEGREES COOLER THAN TODAY'S TEMPS. MOISTURE ON THE NORTHWESTERN SIDE OF THE LOW WILL SPREAD ACROSS THE TENNESSEE VALLEY THURSDAY NIGHT AND MIX WITH COOLING TEMPERATURES ACROSS AREAS MAINLY NORTH OF THE I-40 CORRIDOR.
Steady light NW surface winds will continue to usher in cooler air into the forecast area, resulting in gradually but steadily declining temperatures for at least Wednesday and Thursday.
OVERALL WOULD EXPECT MAIN TEMP DROP THIS 00Z-06Z THEN STEADY OR RISING TEMP REGIME (EVEN IF CLEAR) AS WINDS TURN SOUTHWEST AND WARMER TEMPS AT 850-925 MB MOVE IN. USING POWT TOOL WOULD INDICATE JUST ENOUGH COOLING AT THE SFC TO HAVE A CHANCE FOR FREEZING RAIN.
SLIGHTLY COOLER AIR WILL MOVE INTO THE REGION THROUGH THE REST OF THE WEEK. WITH HIGH PRESSURE PROVIDING DRY CONDITIONS.
258 PM MST WED JAN 21 2015 AFTERNOON GOES WATER VAPOR ANIMATION SHOWED A POSITIVELY-TILTED UPPER TROUGH FROM THE UPPER MIDWEST TO THE FOUR CORNERS REGION. SKIES WERE PARTLY TO MOSTLY CLOUDY WITH TEMPERATURES FROM THE LOW 20S TO MID 30S. UPPER RIDGE AXIS ALONG THE WEST COAST WILL BROADEN AND GRADUALLY EXPAND EAST INTO THE INTERMOUNTAIN WEST DURING THE NEXT 24 TO 48 HOURS.
1241 PM EST WED JAN 21 2015 A SERIES OF LOW PRESSURE SYSTEMS WILL MOVE THROUGH THE OHIO VALLEY TODAY AND MERGE OVER PENNSYLVANIA THIS EVENING.
SKIES WILL GRADUALLY CLEAR FROM NORTH TO SOUTH OVERNIGHT AS MUCH DRIER AIR WORKS IN BEHIND TROUGH AXIS. SHOULD SEE SUNSHINE RETURN IN FULL FORCE ALL AREAS WITH DRIER AIR AND RIDGING SURFACE TO ALOFT.
A BAROCLINIC LEAF STRUCTURE APPEARED TO BE FORMING OVER CENTRAL TEXAS AHEAD OF THE UPPER TROUGH THAT WAS OVER THE SOUTHERN ROCKIES.
930 AM PST WED JAN 21 2015 A LOW PRESSURE TROUGH WILL MOVE EAST AS A HIGH PRESSURE RIDGE APPROACHES FROM THE WEST TODAY.
CURRENT H5 ANALYSIS CENTERS AN UPPER LOW OVER THE GREAT LAKES REGION WITH A LOW AMPLITUDE WAVE DEVELOPING OVER ARIZONA.
LOWS TONIGHT WILL BE IN THE LOWER TO MIDDLE 20S. WITH HIGHS THURSDAY MAINLY IN THE LOWER 30S.
SOME SLIGHT MODERATION IS EXPECTED THURSDAY WITH HIGHS A COUPLE DEGREES WARMER THAN TODAY.
BUILDING HIGH PRESSURE AND SEASONABLE TEMPERATURES ARE EXPECTED TO RETURN OVER THE WEEKEND. A DECENT AREA OF SYNOPTIC UPWARD MOTION BETWEEN THE JET MAX AND TROUGH AXIS WILL WORK ON LIMITED MOISTURE TO PRODUCE A CHANCE OF RAIN AND SNOW SHOWERS ACROSS NORTHERN ARIZONA.