Aikyam-Lab/Synoptic-Bench huggingface dataset:
THE HIGHER RAIN CHANCES WILL PERSIST THROUGH MIDNIGHT THEN GRADUALLY DECREASE FROM WEST TO EAST AS THE REST OF THE NIGHT AND EARLY MORNING HOURS PROGRESS. A COASTAL TROUGH AXIS STRETCHED FROM NEAR MADISONVILLE TO MATAGORDA BAY AS OF 3 PM THIS AFTERNOON.
200 PM EDT MON MAR 9 2015 A WEAK STATIONARY FRONT DISSIPATES OVER THE MID ATLANTIC THIS MORNING WITH HIGH PRESSURE IN PLACE FOR THIS AFTERNOON. LOW PRESSURE PUSHES NORTHEAST FROM THE SOUTHERN PLAINS TONIGHT.
FORECAST MAY STILL EVEN BE ON THE HIGH SIDE THOUGH. ORIENTATION OF THE BEST MOISTURE FLOW PUTS NORTHWEST GA IN THE HIGHEST QPF ZONE.
/ISSUED 410 AM CDT Mon Mar 9 2015/ An upper level low will slowly move east today causing rain chances to increase mainly south and east of a line from Marfa to Snyder. The low will eject northeast today but an upper trough will remain through Tuesday leaving slight rain chances mainly in the higher elevations west of the Pecos River.
THE PATTERN ALOFT FEATURED UPPER RIDGING OVER THE WEST COAST AND INTO THE ROCKIES. WITH A TROUGH MOVING THRU THE CENTRAL AND SOUTHERN PLAINS. A TROUGH WAS LOCATED FROM THE WESTERN DAKOTAS INTO WESTERN NEBRASKA AND A MILD AIRMASS WAS IN PLACE. THE AIRMASS REMAINS DRY AND WARM FOR TUESDAY WITH H85 TEMPS ON THE ORDER OF 1 TO 2 STANDARD DEVIATIONS ABOVE NORMAL FOR THIS TIME OF YEAR AND HIGH TEMPS ARE FORECAST TO REACH THE 60S TO THE LOW 70S. LOW RELATIVE HUMIDITY VALUES ARE EXPECTED TO DROP NEAR 20 PERCENT OR IN THE LOW 20TH PERCENTILE ACROSS THE WESTERN HALF OF OUR CWA. THE PATTERN CONTS BONE DRY AND SUBSTANTIALLY WARMER THAN NORMAL. COOLER. SUN: BREEZY AND MUCH WARMER. VFR CONDITIONS FORECAST AS HIGH PRESSURE HOLDS FIRM CONTROL WIND WILL REMAIN LIGHT.
THE UPPER RIDGE WILL WEAKEN AS A WEATHER SYSTEM APPROACHES ON TUESDAY.
155 PM EDT MON MAR 9 2015 DRY AND SEASONABLY WARM TEMPERATURES EXPECTED TODAY BEFORE AN AREA OF LOW PRESSURE CROSSING THE MID ATLANTIC STATES RESULTS IN RAIN ACROSS THE UPPER OHIO ON TUESDAY. WARMER TEMPERATURES ANTICIPATED TONIGHT AS SOUTHERLY FLOW AHEAD OF LOW PRESSURE APPROACHING FROM THE SOUTH INCREASES OVERNIGHT.
A WEAK UPPER LEVEL TROUGH OF LOW PRESSURE WILL DROP IN OVER NEW MEXICO TODAY.
THE FORECAST SOUNDINGS DOES SHOW TEMPS SHOULD STAY AT OR ABOVE FREEZING. THERE COULD BE SOME FREEZING OF THE LIQUID ON COLDER SURFACES EARLY TUESDAY MORNING.
AN UPPER TROUGH OVER WEST TEXAS AND NEW MEXICO WILL SPREAD RAIN INTO CENTRAL AND SOUTHERN PARTS OF OUR REGION TUESDAY AS A PORTION OF THIS MOVES INTO THE LOWER MISSISSIPPI AND OHIO VALLEYS.
303 PM MDT MON MAR 9 2015 QUIET WEATHER CONTINUES ACROSS THE CENTRAL ROCKIES THIS AFTERNOON AS UPPER LEVEL RIDGING BECOMES ESTABLISHED OVER THE WESTERN US. EXPECT WARM AND DRY CONDITIONS TO PERSIST THROUGH AT LEAST WED NIGHT WITH LARGE SCALE SUBSIDENCE BENEATH THE UPPER RIDGE. SHOULD SEE HIGHS A FEW DEGREES WARMER THAN TODAY. BUT IT WILL BE TOUGH TO GET MUCH WARMER THAN THE MID 50S LOCALLY IF THE GFS/NAM VERIFY WITH H7 TEMPS AROUND -2 DEG C. WARMEST DAY WILL BE WED WITH DOWNSLOPING AND GOOD SUBSIDENCE WITH THE RIDGE AXIS OVERHEAD.
TEMPERATURES WILL DROP IN THE LOW TO MID 30S AND THE AIR WILL BE DRY ENOUGH TO PRECLUDE EVEN PATCHY FOG.
KRC WEAK SURFACE COLD FRONT HAS GRADUALLY SETTLED SOUTH ACROSS SOUTH CENTRAL KANSAS EARLY THIS MORNING. WITH A BIT STRONGER TROF MOVING FROM THE SOUTHERN PLAINS ACROSS THE OZARKS TONIGHT. THE REST OF THE AREA IS EXPECTED TO REMAIN DRY WITH TEMPERATURES A TAD COOLER THOUGH REMAINING ABOVE EARLY MARCH CLIMO.
BUT HAVE LEFT A CHANCE JUST ALONG THE COASTAL COUNTIES AS WEAK TROUGH REMAINS ALONG THE COAST. THE MAIN UPPER LEVEL LOW WILL REMAIN NEAR THE REGION AND SHOULD CONTINUE CONSIDERABLE CLOUDINESS.
A WEAK UPPER TROUGH WILL CONTINUE MOVING THROUGH CO TODAY. THE AXIS OF THE WESTERN LOBE OF THIS TROUGH IS CURRENTLY PUSHING SOUTHWARD THROUGH UT AND NV. WILL MAINTAIN SLIGHT CHANCE TO CHANCE POPS OVER THE HIGHER ELEVATIONS. TEMPS TODAY WILL BE A FEW DEGREES WARMER THAN YESTERDAY. WHICH WILL MAKE FOR A RATHER PLEASANT SPRING-LIKE DAY FOR THE LOWER ELEVATIONS. WITH TEMPS FOR THE PLAINS GETTING JUST BELOW FREEZING. AND TEENS FOR THE HIGH VALLEYS.
328 PM PDT MON MAR 9 2015 HIGH PRESSURE OVER THE WEST WILL BRING WARM AND DRY CONDITIONS THROUGH TUESDAY.
06Z OBJECTIVE SURFACE ANALYSIS INDICATED A HIGH PRESSURE RIDGE FM CENTRAL NEB EWD INTO SOUTHERN IA. AND WE FEEL THIS TREND IS LIKELY TO CONT TODAY /ESPECIALLY IN THE NW CWA WHERE THE LOW LEVEL FLOW WILL GO SW THIS AFTN/. HEIGHTS ALOFT WILL INCREASE FOR BOTH TUE AND WED LEADING TO EVEN WARMER TEMPERATURES WITH MOST LOCATIONS SEEING LOWER 70S FOR BOTH TUE/WED.
151 PM EDT MON MAR 9 2015 HIGH PRESSURE CENTERED OVER THE OHIO VALLEY WILL REMAIN IN CONTROL OF OUR WEATHER THROUGH MONDAY NIGHT. ON TUESDAY LOW PRESSURE ALONG THE GULF COAST WILL MAKE ITS WAY TOWARD THE OHIO VALLEY. HIGH PRESSURE WILL BUILD BACK IN FOR THE MIDDLE PART OF THE WEEK. LIGHT RAIN AND SNOW MOVING THROUGH THE AREA DURING THE OVERNIGHT HOURS WILL MOVE EAST BY DAWN OR SO AS HIGH PRESSURE AND DRY AIR MOVE IN FROM THE WEST. MOISTURE WILL BEGIN INCREASING FROM THE SOUTH AHEAD OF THE LOW DEVELOPING IN TX/LA. TUESDAY THE LOW WILL MOVE NORTHEAST EVENTUALLY REACHING THE LOWER OHIO VALLEY TUESDAY EVENING. MOISTURE WILL INCREASE ACROSS THE AREA FROM THE SOUTH AHEAD OF THE LOW.
158 PM CDT MON MAR 9 2015 WATER VAPOR IMAGERY DEPICTS A TROF MOVING SLOWLY THRU WRN/SRN TX WITH SWLY FLOW STREAMING PLENTIFUL MOISTURE NE INTO THE OZARKS AND LWR MS VALLEY. THE WARM FRONT WILL LIFT N OF OUR AREA BY MORNING WHICH MAY KEEP THE MAJORITY OF WIDESPREAD PRECIP TO OUR N AND W ON TUESDAY.
THEY SEEM TO BE DRYING UP BASED ON LATEST MODEL RUNS AS THE MAJORITY OF THE MODELS KEEP THE MAIN PRECIPITATION SHIELD ASSOCIATED WITH THE UPPER LOW OVER NRN MEXICO GENERALLY SOUTH OF THE TX AND OK PNHDLS.
115 PM EDT MON MAR 9 2015 GENERALLY QUIET WEATHER WILL RETURNS AFTERNOON WITH WARMER TEMPERATURES THROUGH THE MIDDLE OF THE WEEK. CANADIAN HIGH PRESSURE WILL KEEP DRY WEATHER OVER THE REGION, BUT BRING COOLER AIR WITH SLIGHTLY BELOW NORMAL TEMPERATURES. 850MB TEMPERATURES WILL BE WARMER AS SOUTHERLY FLOW CONTINUES OVER THE REGION, BUT PARTLY CLOUDY TO MOSTLY CLEAR SKIES WILL ALLOW FOR RADIATIONAL COOLING IN WINDS GENERALLY 5KTS OR LESS. EXPECT RESIDUAL RIDGING AT THE SURFACE AND MAIN ENERGY OF THE NORTHERN SYSTEM BEING FAR TO THE NORTH TO KEEP THE NORTH COUNTRY DRY. THIS NORTHERLY SYSTEM TRACKING OVER JAMES BAY WILL INCREASE SOUTHERLY FLOW AND BRING WARMER TEMPERATURES OVER THE REGION.
HIGH PRESSURE WILL MAINTAIN DRY WEATHER AND ABOVE NORMAL HIGH TEMPERATURES IN THE INTERIOR.
THE H500 TROUGH REMAINS STOUT. AS THE UPPER TROUGH BEGINS TO LIFT E/NE. AND REALLY CANNOT DENY IT GIVEN THE NICE ISENTROPIC RESPONSE AT 295 AND 300K ON THE NORTH SIDE OF THE LOW. BROAD UPPER RIDGING ACROSS THE NORTH. STAGNANT UPPER TROUGH OVER MEXICO. A DRY COLD FRONT WILL PUSH THROUGH SAT NIGHT.
WHICH SHOULD KEEP TEMPERATURES FROM FALLING MUCH BELOW FREEZING EVEN IN AREAS WITH SNOW COVER. TUESDAY SHOULD BE EVEN WARMER THAN TODAY. SOME AMPLIFICATION WILL OCCUR OVER THE WEEKEND AS A NORTHERN STREAM UPPER TROF DROPS THROUGH THE GREAT LAKES AND PHASES WITH SOUTHERN STREAM ENERGY EAST OF WISCONSIN.
A WARM FRONT WAS MOVING THROUGH THE EASTERN DAKOTAS.
SW GRADIENT FLOW AND MIXING ARE EXPECTED TO REMAIN STRONG ENOUGH TO KEEP TEMPS FROM FALLING OFF TOO FAR WITH MIN READINGS AOA FREEZING IN DOWNSLOPE LOCATIONS NEAR LAKE SUPERIOR AND IN THE UPPER 20S TO AROUND 30 INLAND. UPSTREAM OBS SUGGEST TEMPS SHOULD CLIMB INTO THE LOWER TO MID 50S. THE LOWER ALBEDO IN THE FORESTED AREAS WILL AID IN WARMING/MIXING. DOWNWIND FROM LAKE MI TEMPS WILL AGAIN REMAIN CLOSER TO THE LOWER 40S FROM THE GARDEN PENINSULA EASTWARD. BEHIND THE WEAK COLD FRONT TUESDAY.
MOIST AIR AT THE SURFACE CONTINUES TO ADVECT IN FROM THE NORTHEAST DUE TO BACKING LOW LEVEL FLOW ASSOCIATED WITH A STRENGTHENING TROUGH ALONG THE TEXAS COAST. WARM/MOIST AIR ADVECTION ALOFT WILL CONTINUE TO OVERRIDE THE COOLER AIRMASS NEAR THE SURFACE AHEAD OF AN UPPER TROUGH OVER MEXICO. THE HIGHEST MOISTURE VALUES STILL REMAIN OVER THE SOUTHEAST COUNTIES. /ISSUED 410 AM CDT MON MAR 9 2015/ A SHORT WAVE TROUGH WILL ROTATE ACROSS SOUTH TEXAS TODAY AND BRING NUMEROUS SHOWERS TO THE ENTIRE REGION.
An upper level low is currently over central Texas and slowly moving northeast into the lower Mississippi River Valley region.
243 PM CDT MON MAR 9 2015 THE LATEST SATELLITE LOOP INDICATES AN UPPER LOW OVER MEXICO AND WEST TEXAS MAKING SLOW BUT STEADY PROGRESS EAST INTO CENTRAL TEXAS THIS AFTERNOON. WITH A TEXAS COASTAL TROUGH STILL IN PLACE. AS A BROAD TROUGH ORIENTED FROM THE NORTHEAST TO SOUTHWEST EXTENDS FROM MISSOURI TO MEXICO.
THE MELTING SNOW PACK AND THE WARMER AIR TRYING TO MOVE IN HAS RESULTED IN SOME LOCALLY STUBBORN DENSE FOG AND TEMPS OF ONLY 40 DEGREES. UPPER TROF WILL SET UP SHOP FROM THE SOUTHERN PLAINS INTO NORTHERN MEXICO. PLENTY OF MOISTURE WILL BE ADVECTING NORTH FROM THE GULF ON THE EAST SIDE OF THE TROF OVER THE NEXT SEVERAL DAYS LEADING TO BOUTS OF RAIN ACROSS THE MIDSOUTH AND THE POTENTIAL FOR SEVERAL INCHES OF RAINFALL.
319 PM PDT Mon Mar 9 2015 Above normal temperatures continue into Tuesday under strong high pressure.
WITH LOW PRESSURE SYSTEMS PUSHING EAST ACROSS CANADA AND SOUTHERN US.
332 PM EDT MON MAR 9 2015 A COLD FRONT WILL EXIT THE AREA THIS EVENING AND HIGH PRESSURE WILL BUILD FROM THE WEST TONIGHT. LOW PRESSURE WILL TRACK NORTH OF THE REGION ON TUESDAY AND DRAG A WARM FRONT ACROSS MAINE.
ALONG WITH INCREASING RAIN CHANCES AFTER MIDNIGHT AND ON INTO SUNDAY AS THE COLD FRONT LIFTS BACK NORTH THROUGH THE AREA. AS SFC TO MID LEVEL HIGH PRESSURE REMAINS ANCHORED TO THE EAST AND THE REGION REMAINING UNDERNEATH RELATIVELY FLAT WESTERLY FLOW ALOFT. 13 A COLD FRONT ACCOMPANIED BY SCATTERED SHOWERS WILL CONTINUE TO PUSH THROUGH THE COASTAL WATERS THIS MORNING. SHIFTING MORE EAST THEN SOUTHEAST AS HIGH PRESSURE MOVES OVER THE SOUTHEASTERN STATES.
ANOTHER FOCUS FOR CONVECTION HAS BEEN IN WESTERN KY AHEAD OF THE ADVANCING COLD FRONT. SOME BREAKS IN CLOUDS ARE OCCURRING AHEAD OF THIS CONVECTION AND DEWPOINTS HAVE INCREASED INTO THE LOWER 60S ACROSS CENTRAL AND SOUTH CENTRAL KY. MUCH COOLER AND DRIER AIR WILL POUR INTO THE AREA. THE PATTERN WILL CHANGE TO A WESTERN TROUGH WITH SW MOIST FLOW ACROSS THE AREA FOR THE ENTIRE WEEK. THE TROUGH FINALLY LIFTS OUT TOWARDS THE END OF THE WEEK. WITH THE FRONT MOVING THROUGH AS A COLD FRONT. THE RESPONSIBLE COLD FRONT HAS NOW SHIFTED JUST EAST OF THE STATE. WITH HIGH PRESSURE IN CONTROL SATURDAY THROUGH SUNDAY.
AN UPPER TROUGH WAS MOVING INTO THE GREAT LAKES REGION WITH A SHORT WAVE TROUGH EXTENDING DOWN INTO NORTHERN MISSOURI. A LEE-SIDE TROUGH WILL TAKE CONTROL OF THE LOW LEVEL PATTERN OVERNIGHT AND BEGIN TRANSPORTING LOW LEVEL MOISTURE BACK NORTHWARD OVER THE CWA.
354 AM CDT SAT APR 4 2015 LATEST WATER VAPOR IMAGERY SHOWS A CLOSED UPPER LOW CIRCULATING JUST OFFSHORE OF BRITISH COLUMBIA.
235 AM CDT SAT APR 4 2015 HIGH PRESSURE WILL MOVE FROM THE PLAINS TO THE CAROLINAS OVER THE NEXT 30 HOURS. COOLER WEATHER.
358 AM EDT SAT APR 4 2015 GUSTY WINDS WILL OCCUR TODAY BETWEEN HIGH PRESSURE OVER THE MID MISSISSIPPI VALLEY. HIGH PRESSURE WILL ARRIVE OVERHEAD LATE TONIGHT AND SHIFT OFFSHORE SUNDAY. WOULD NOT BE SURPRISED IF A FEW HIGHER RIDGES GUST TO 55-60 MPH. HIGH PRESSURE WILL EXTEND EAST FROM TN/KY WITH SUNNY SKIES SHAPING UP WITH HIGHS SOMEWHAT COOLER THOUGH SEASONAL RANGING FROM THE LOWER TO MID 50S MOUNTAINS TO LOWER 60S EAST. GOING TO SEE WINDS FALL OFF FAST THIS EVENING AS THE HIGH BRINGS LIGHT/CALM WINDS AS IT MOVES OVERHEAD. HIGH PRESSURE EXITS EAST SUNDAY. TEMPERATURES WILL RECOVER FROM A CHILLY START DURING THE AFTERNOON WITH READINGS GENERALLY IN THE MID 60S EAST OF THE RIDGE. AS THE UPPER FLOW TRANSITIONS TO FLAT RIDGING WE WILL GET INTO WARM AND MOIST SOUTHWESTERLY FLOW AND UNSETTLED WEATHER TO START THE WEEK.
SO THAT COULD KEEP TEMPS A BIT COOLER AND RH VALUES JUST ABOVE 15 PERCENT. TEMPS WILL BE A FEW DEGREES WARMER THAN SAT.
446 AM CDT Sat Apr 4 2015 Temperatures this morning are much cooler behind the front with broken mid to high clouds over the area. High winds continue through Guadalupe Pass so the High Wind Warning for that area is allowed to continue. Temperatures today are expected to be well below normal with many places experiencing highs in the lower 60s.
A 500 MB TROUGH IS AMPLIFYING AS IT PUSHES ACROSS THE EASTERN UNITED STATES THIS MORNING. WHEN THE TROUGH AXIS SWINGS EAST OF THE AREA LATER THIS MORNING.
ATLANTIC LOW LEVEL HIGH PRESSURE RIDGE WITH AXIS ACROSS SOUTH CENTRAL FLORIDA WILL CONTINUE TO DRIFT EASTWARD THROUGH THE WEEKEND AHEAD OF A WEAK COLD FRONT. ASSOCIATED WITH AN UPPER RIDGE CENTERED OVER CENTRAL MEXICO/WESTERN GULF OF MEXICO RESULTS IN DRY AND WARM WEATHER. A COLD FRONT WILL PUSH INTO NORTHERN FLORIDA AND THEN STALL ACROSS CENTRAL FLORIDA SATURDAY NIGHT. THE MID LEVEL RIDGE OVER THE GULF WILL SLOWLY AMPLIFY THROUGH THE REST OF THE WEEK AS IT PUSHES SLOWLY EASTWARD. HIGHS ARE FORECAST TO BE IN THE LOW/MID 80S METRO AREAS AND UPPER 80S TO LOW 90S INLAND.
456 AM CDT SAT APR 4 2015 COLD FRONT HAS MOVED OFF THE COAST.
131 AM EDT SAT APR 4 2015 A COLD FRONT IS MOVING THROUGH THE REGION THIS MORNING.
627 AM EDT SAT APR 4 2015 HIGH PRESSURE WILL MOVE ACROSS THE REGION TODAY AND CONTINUE TO EXTEND INTO THE AREA ON SUNDAY.
INCREASED POPS ALONG AND NORTH OF THE HIGHWAY 2 CORRIDOR IN NORTHEAST MINNESOTA WITH LIGHT SNOW JUST UPSTREAM.
KULA VFR CONDITIONS ARE EXPECTED ACROSS N AL/S MIDDLE TN FOR THE NEXT 24 HOURS IN THE WAKE OF A COLD FRONT.
WEAK SHORT WAVE DROPPING SOUTHEAST ACROSS NORTHERN MN AT THIS TIME IS DRIVING A COLD FRONT THROUGH CENTRAL MN THIS MORNING.
High pressure currently centered on the region will shift to the east today, with southerly winds returning. Afternoon high temperatures will warm into the lower to middle 60s with mostly clear skies. The warmest readings of the day are likely to reside over northern Missouri, with cooler temperatures closer to the earlier onset of cloud cover.
551 AM EDT SAT APR 4 2015 LARGE AREA OF HIGH PRESSURE WILL MOVE ACROSS THE OHIO VALLEY TODAY THEN MOVE OFF THE SOUTHEAST COAST ON SUNDAY. THIS WILL ALLOW A BACKDOOR COLD FRONT TO MOVE OVER EASTERN LAKE ERIE SUNDAY.
The high pressure will continue to slide to the southeast today, and temperatures will continue to fall into the lower 30s this morning. Clear skies and light winds will continue this morning as the high moves over the region. This afternoon as the high starts to shift east southerly winds of 5 to 10mph will begin to develop from west to east. A very dry air mass is also spreading into the region with the cooler temperatures and humidity values will drop below 30 percent this afternoon. The far eastern portions of the forecast area across south central Missouri may remain close enough to the high to keep light winds longer and lows could fall into the middle 30s. A warm front will then spread north into and through the area Sunday afternoon and night.
A cold front will quickly move through the Northern Rockies today causing widespread snow showers. The feature will move into Lemhi county and southwest Montana Sunday morning which could drop a couple of inches in the higher terrain.
250 AM CDT Sat Apr 4 2015 The latest surface map has high pressure centered over southern Kansas and is expected to drift into southern Missouri by later this afternoon bringing quiet weather to the region. After a rather frosty start to the day with early morning lows as cold as the middle 20s in our northwest to the lower 30s southeast, we look for temps to recover nicely this afternoon with forecast soundings indicating lower 60s across the west with upper 50s far east.
150 AM EDT SAT APR 4 2015 HIGH PRESSURE OVER THE UPPER MIDWEST WILL MOVE SOUTHEAST ACROSS THE AREA LATE TONIGHT AND SATURDAY PROVIDING DRY CONDITIONS. WITH HIGHS SATURDAY IN THE LOWER TO MIDDLE 50S. CONTD TO LEAN TOWARD WARMER GUIDANCE TEMPS WITH HIGHS EXPECTED IN THE L50S EAST AND M50S WEST. CONTINUED TO FAVOR WARMER GUIDANCE FOR SUNDAY'S HIGHS GIVEN AMPLE SUNSHINE AND DEEPER MIXING IN SOMEWHAT BREEZY SW FLOW.
341 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.
359 AM EDT SAT APR 4 2015 A COLD FRONT IS MOVING THORUGH THE MID ATLANTIC STATES. HIGH PRESSURE WILL MOVE IN FOR THE WEEKEND. TDA WL BE COOLER W/ HIGHS IN THE 50S. HIGH PRES MOVG OFF THE CST WL ALLOW FOR RETURN FLOW/A WARMER DAY.
231 AM MDT SAT APR 4 2015 A RIDGE WILL BE OVER THE ROCKIES TODAY AND SHIFT EAST INTO THE PLAINS SUNDAY.
The synoptic pattern this morning features an upper trough nosing from the Midwest into the Ohio Valley, with an upstream ridge across the Intermountain West. The trough will deamplify through the short term period, allowing the flow to become more zonal by Sunday. Much needed dry weather is on tap today, as high pressure builds into the region. With surface ridging sliding through, mixing will be limited. Therefore, temperatures will be a bit cooler as they climb into the upper 50s and lower 60s.
319 AM EDT SAT APR 4 2015 A COLD FRONT IS MOVING THROUGH THE REGION THIS MORNING.
618 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.
A WEAK FRONT /WHICH IS NEARLY STATIONARY/ AHEAD OF A PARENT UPPER LOW OFF THE COAST WILL BE THE FOCUS FOR LIGHT SHOWERS TODAY. THE AIR MASS IS DRY IN THE LOWER LEVELS BUT WILL MOISTEN UP THROUGH THE AFTERNOON. A WARM FRONT WILL LIFT NORTHWARD THROUGH THE REGION WHICH WILL BE THE PRIMARY FOCUS FOR SHOWERS. CONTINUING GOOD AGREEMENT THAT UPPER LEVEL FLOW WILL AMPLIFY AND LEAD TO A BROAD COOL TROUGH AFFECTING THE AREA SUNDAY NIGHT THROUGH MID-WEEK.
433 AM EDT SAT APR 4 2015 A COLD FRONT WILL CROSS THE REGION THIS MORNING WITH DRY CANADIAN HIGH PRESSURE BUILDING ACROSS THE AREA THIS AFTERNOON THROUGH SUNDAY. THE AREA HIGH PRESSURE WILL MOVE OUT TO SEA SUNDAY NIGHT ALLOWING MOISTURE AND THE CHANCE FOR SHOWERS TO RETURN FOR MUCH OF THE WORK-WEEK. COLD FRONT CURRENTLY EXTENDING ACROSS THE CAROLINA MOUNTAINS INTO NORTH GEORGIA WILL CROSS THE MIDLANDS AND CSRA THIS MORNING. SHOWERS AHEAD OF THE COLD FRONT WILL MOVE OUT OF THE NORTHERN MIDLANDS BEFORE SUNRISE. DRY AIR WILL FILTER INTO THE MIDLANDS AND CSRA BEHIND THE COLD FRONT. CANADIAN HIGH PRESSURE NOW OVER THE PLAINS WILL BUILD INTO THE AREA OVERNIGHT. THE AREA OF HIGH PRESSURE WILL MOVE OFFSHORE SUNDAY NIGHT ALLOWING MOISTURE TO RETURN.
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.
TODAY THROUGH SUNDAY NIGHT UPPER LEVEL ANALYSIS HAS LOW AMPLITUDE RIDGING OVER THE WESTERN CONUS AND LOW AMPLITUDE TROUGH OVER THE EASTERN HALF. UPPER LOW SPINS OVER THE HUDSON BAY. HIGH CLOUDS ARE STREAMING OVER THE RIDGE INTO THE NORTHERN PLAINS. UPPER RIDGE WILL BEGIN CROSSING THE NORTHERN PLAINS. WITH THE MAV ON THE COOLER SIDE COMPARED TO THE MET AND THE ECM. CURRENTLY FORECASTING HIGHS RANGING FROM THE LOWER 50S ACROSS NORTHWESTERN SD TO THE LOWER 60S IN SOUTHERN SD. UPPER TROUGH APPROACHES THE CENTRAL CONUS SUNDAY INTO SUNDAY NIGHT.
THE COLD FRONT CONTINUES TO MOVE SWD OVER THE MSA/JUST SOUTH OF THE CWA EARLY THIS MORNING (MSAS SFC THETA-E/SFC OBSERVATIONS.
Flow aloft will remain west to southwest the next 24 hours as a flat ridge prevails across the Plains. Abundant mid and high clouds coupled with easterly low level flow will result in below normal temperatures for today with highs only topping out in the lower and middle 60s. Lows tonight will be in the lower 50s.
518 AM EDT SAT APR 4 2015 A COLD FRONT WILL CROSS THE REGION THIS MORNING WITH DRY CANADIAN HIGH PRESSURE BUILDING ACROSS THE AREA THIS AFTERNOON THROUGH SUNDAY. THE AREA HIGH PRESSURE WILL MOVE OUT TO SEA SUNDAY NIGHT ALLOWING MOISTURE AND THE CHANCE FOR SHOWERS TO RETURN FOR MUCH OF THE WORK-WEEK. COLD FRONT CURRENTLY EXTENDING ACROSS THE CAROLINA MOUNTAINS INTO NORTH GEORGIA WILL CROSS THE MIDLANDS AND CSRA THIS MORNING. SHOWERS AHEAD OF THE COLD FRONT WILL MOVE OUT OF THE NORTHERN MIDLANDS BEFORE SUNRISE. DRY AIR WILL FILTER INTO THE MIDLANDS AND CSRA BEHIND THE COLD FRONT. CANADIAN HIGH PRESSURE NOW OVER THE PLAINS WILL BUILD INTO THE AREA OVERNIGHT. THE AREA OF HIGH PRESSURE WILL MOVE OFFSHORE SUNDAY NIGHT ALLOWING MOISTURE TO RETURN.
NORTH WINDS OF 20 TO 30 MPH WILL RAPIDLY DECREASE TOWARDS EVENING AS THE HIGH BUILDS SOUTH, THEN BECOME LIGHT AND VARIABLE FOR THE EVENING, THEN TURN LIGHT SOUTH TO SOUTHWEST AFTER MIDNIGHT. UNDER MOSTLY CLEAR SKIES AND LIGHT WINDS, OVERNIGHT LOWS WILL DROP TO AROUND THE FREEZING MARK, EXCEPT FAR SOUTHWEST KANSAS NEAR ELKHART WHERE WARMER SOUTH WINDS BEGIN TO INCREASE. ON SATURDAY, AS HIGH PRESSURE CONTINUES TO MOVE SOUTHEAST ACROSS THE ARKLATEX REGION AND LOW PRESSURE DEVELOPS IN THE LEE OF THE ROCKIES, A STRONG PRESSURE GRADIENT WILL BE FOUND ACROSS WESTERN KANSAS. THIS WILL PRODUCE LOW LEVEL LEE TROUGHING WITH SOUTHERLY FLOW.
HIGH PRESSURE WILL TRY TO BUILD OVER THE REGION FROM THE SOUTH THIS WEEKEND HOWEVER A BACKDOOR COLD FRONT COULD SLIP INTO THE AREA FROM THE NORTHEAST ON SUNDAY. COLD ADVECTION HAS KICKED IN AT THE LOWER LEVELS OF THE ATMOSPHERE. HOWEVER WE ARE STILL WAITING FOR THE 7H TROUGH TO PASS OVERHEAD. SO THERE WILL CONTINUE TO BE SOME WEAK LIFT AHEAD OF THE TROUGH AS THE MOISTURE BEGINS TO MOVE EASTWARD.
HIGH PRESSURE WILL MOVE FROM THE PLAINS TO THE CAROLINAS OVER THE NEXT 30 HOURS. COOLER WEATHER.
WARM FRONT SETS UP FROM WEST TO EAST ACROSS SD TODAY WHICH WILL BRING WARMER TEMPS TO THE REGION. THIS FRONT SHIFTS SOUTH AS A COLD FRONT OVERNIGHT AS NORTHEAST WINDS DEVELOP. COOLER AIR WILL THEN BE THE STORY FOR THE REST OF THE SHORT TERM PERIOD WITH CONTINUED NORTHEAST BREEZES.
SKIES ARE MOSTLY CLEAR TO PARTLY CLOUDY WITH TEMPERATURES IN THE LOWER TO MID 70S ALONG THE FLORIDA KEYS. UNLIKE THE LAST SEVERAL DAYS WHEN DEWPOINT READING WERE AVERAGING IN THE LOWER 60S. EAST-WEST ORIENTED AND WEAKENING RIDGE LIES ACROSS CENTRAL FLORIDA.
HIGH PRESSURE WILL BUILD IN FOR THE WEEKEND. A CLEARING TREND IS THEN EXPECTED THROUGH THE AFTERNOON AS HIGH PRESSURE QUICKLY BUILDS IN. AS THE HIGH EXITS. A SURFACE BOUNDARY IS PROGGED TO SET UP FROM THE PLAINS INTO THE LOWER GREAT LAKES. MVFR TO IFR CIGS THROUGH THE EARLY MORNING AS COLD ADVECTION BEHIND DEPARTING LOW PRESSURE DOMINATES.
340 AM EDT SAT APR 4 2015 LARGE AREA OF HIGH PRESSURE WILL MOVE ACROSS THE OHIO VALLEY TODAY THEN MOVE OFF THE SOUTHEAST COAST ON SUNDAY. THIS WILL ALLOW A BACKDOOR COLD FRONT TO MOVE OVER EASTERN LAKE ERIE SUNDAY.
A LEE-SIDE TROUGH DEVELOPS ON SUNDAY TO KEEP WINDS FROM THE SW AT 15 TO 25 MPH.
CLEAR SKIES WILL CONTINUE OVERNIGHT ALLOWING LOW TEMPS TO PLUMMET AND A GOOD PORTION OF THE AREA WILL GET NEAR/JUST BELOW FREEZING OVERNIGHT. REACHING FREEZING TEMPERATURES WILL BE MARGINAL FOR MOST COUNTIES, BUT DUE TO TOPOGRAPHY SOME PLACES IN THE COUNTY WILL EXPERIENCE A FREEZE WHILE OTHERS DON'T.