Aikyam-Lab/Synoptic-Bench huggingface dataset:
THIS EVENING THROUGH SATURDAY NIGHT CURRENT SURFACE MAP SHOWS LOW PRESSURE ACROSS WESTERN CENTRAL MINNESOTA. WITH COLD FRONT TRAILING ACROSS SOUTHERN NORTH DAKOTA INTO NORTHEAST MONTANA. COLD FRONT ACROSS NORTH DAKOTA BACKS INTO WESTERN SOUTH DAKOTA TONIGHT AS HIGH PRESSURE BUILDS ACROSS EASTERN DAKOTAS. UPPER LEVEL RIDGE SHIFTS ACROSS THE NORTHERN PLAINS FOR SATURDAY.
Upper ridge over central Montana today for warm temperatures. An upper level short wave trough sweeps into northwest Montana later this afternoon with a weak, associated cold front. Trough timing is a little slower than yesterday now arriving into north central Montana this evening. Instability ahead of trough and daytime heating will result in showers and thunderstorms spreading from the Rockies this afternoon into north central and northeast Montana this evening. Winds will pick up later this afternoon as the weak cold front moves across the area.
THEN HIGH PRESSURE WILL SETTLE ACROSS THE REGION FOR THE WEEKEND.
THE 00Z MODELS ALL BRING A WEAK COLD FRONTAL WIND SHIFT INTO THE REGION.
CLOUDS AND RAINS WILL KEEP THE TEMPS COOLER THAN YESTERDAY. BY LATE ON SUNDAY THE FRONTAL BOUNDARY IS EXPECTED TO FINALLY GET A KICK AS THE UPPER LEVEL TROF WILL MOVE NORTHEAST OF THE REGION.
318 AM CDT SAT MAR 21 2015 THE COLD FRONT THAT CAME THROUGH THE REGION YESTERDAY WAS STRETCHED FROM KANSAS CITY TO MILWAUKEE EARLY THIS MORNING. THE AIRMASS WITH THIS HIGH PRESSURE IS VERY DRY. WE WILL QUICKLY SEE MIDLEVEL CLOUDS DIVE SOUTHEAST FROM NODAK TOWARD SW WI LATE THIS MORNING INTO THE AFTERNOON AS WE GET INTO A TIGHT MIDLEVEL TEMP GRADIENT BETWEEN A VERY DEEP AND COLD H5 LOW THAT WILL BE MOVING OVER THE SOUTHERN SHORE OF HUDSON BAY AND A FLATTENING OUT UPPER RIDGE THAT WILL BE MOVING INTO THE NRN HIGH PLAINS. THEREFORE MANIPULATED THE SNOW RATIO GRIDS TO BE ON THE HIGHER END OF GUIDANCE.
323 AM CDT SAT MAR 21 2015 UPPER LOW THAT HAS BEEN LOCATED NEAR THE BAJA THE LAST COUPLE OF DAYS WILL MOVE NORTHEAST TOWARD THE AREA TODAY.
SFC RIDGING WILL BE IN PLACE ACROSS THE REGION WITH A COUPLE WEAK WAVES INDUCING FRONTOGENESIS AND BANDS OF SNOW. SIMILAR SCENARIO ALTHOUGH THE RIDGING WILL BE SHIFTED SLIGHTLY EAST AND SYNOPTIC SUPPORT IS SLIGHTLY STRONGER.
CURRENTLY WITH A BOUNDARY ALONG THE GULF COAST AND A WEAK RIDGE ACROSS A CHUNK OF THE SOUTHERN U. THE BOUNDARY ACROSS THE COAST SHOULD SHIFT NORTHWARD OVER LOUISIANA AND EASTWARD TO THE ALABAMA GULF COAST WITH A WARM FRONTAL BOUNDARY DEVELOPING BY SUNDAY. A LOW PRESSURE SYSTEM OVER THE GREAT LAKES WILL DRAG A FRONT ACROSS THE EASTERN U.
AN UPPER LEVEL TROUGH WILL MOVE ACROSS WESTERN WASHINGTON TODAY BRINGING SHOWERS AND A PUGET SOUND CONVERGENCE ZONE. A COLD FRONT WILL SPREAD RAIN PARTWAY INLAND SUNDAY MORNING THEN ACROSS ALL OF WESTERN WASHINGTON SUNDAY AFTERNOON.
143 AM EDT SAT MAR 21 2015 HIGH PRESSURE WILL USHER IN DRY AND WARM CONDITIONS ON SATURDAY BEFORE A COLD FRONT BRINGS COOLER AIR TO THE AREA SATURDAY NIGHT INTO SUNDAY. A COLD FRONT IS ALSO EXPECTED TO PUSH THROUGH THE AREA TOMORROW BUT NOT SOON ENOUGH TO HELP BRING DOWN HIGH TEMPERATURES ANY IN OUR SOUTHERN ZONES. HIGH PRESSURE RIDGE WILL BUILD UP THE OHIO VALLEY TONIGHT PROVIDING A LITTLE SUBSIDENCE. MODELS ARE HANDLING THE LOW LEVEL MOISTURE IN THEIR TYPICAL FASHION. COOL CANADIAN HIGH PRESSURE WILL BUILD IN ACROSS THE GREAT LAKES SATURDAY NIGHT INTO SUNDAY. REACHING THE LOWER TO MID 60S AROUND THE OHIO RIVER. AS THE COOLER AIR SETTLES IN SATURDAY NIGHT.
519 AM EDT SAT MAR 21 2015 HIGH PRESSURE WILL BUILD SOUTH OF THE REGION WITH A SOUTHERLY FLOW ALLOWING FOR DRY AND WARM CONDITIONS TODAY. A COLD FRONT WITH LIMITED MOISTURE WILL PASS THROUGH LATE TODAY OFFERING AN INCREASE IN CLOUDS. COOLER AIR WILL SETTLE IN BEHIND THIS FRONT INTO THE FIRST OF THE WEEK. EXPECT HIGHS SUNDAY TO RANGE FROM THE LOWER 40S NORTH TO THE MID/UPR 50S FAR SOUTH.
358 AM CDT SAT MAR 21 2015 AN AREA OF HIGH PRESSURE NORTHEAST OF THE REGION WILL FILTER COOLER AND DRIER AIR INTO THE CWA THROUGH AT LEAST MID MORNING. THIS HIGH WILL RETREAT NORTH THROUGH THE DAY IN RESPONSE TO A LOW PRESSURE SYSTEM WEST OF THE REGION. ALONG WITH A WEAK UPPER LEVEL TROUGH WILL TRACK ACROSS THE REGION LATE TONIGHT THROUGH SUNDAY EVENING. THERE IS A CONCERN WITH THE AMOUNT OF DRY AIR IN THE LOWER LEVELS WHICH WOULD LIMIT PCPN AMOUNTS.
358 AM CDT SAT MAR 21 2015 EARLY MORNING GOES WATER IMAGERY SHOWED A SOUTHERN BRANCH UPPER LEVEL LOW OVER NORTHWEST MEXICO. TODAY WILL SEE THE UPPER LOW BEGIN TO LIFT EASTWARD. DIFFLUENT FLOW OVER A MOIST MARITIME AIRMASS WILL AID IN THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS FROM EAST TEXAS THROUGH THE LOWER MS RIVER VALLEY THIS AFTERNOON. THE UPPER LOW WILL DEAMPLIFY INTO AN OPEN WAVE AS TI LIFTS THROUGH THE LOWER MS RIVER VALLEY ON SUNDAY. WITH THE APPROACH OF THE UPPER LOW AND TAPER OFF FROM WEST TO EAST SUNDAY NIGHT. LOW AMPLITUDE UPPER LEVEL RIDGING WILL BRING ABOVE NORMAL TEMPS TO THE MIDSOUTH EARLY IN THE WORK/SCHOOL WEEK.
TEMPS WERE MAINLY IN THE LOW 50S WITH DEWPOINTS IN THE MID 40S. HOWEVER THE NEXT WX MAKER IS AN UPPER TROF NOW OVER THE SWRN US.
656 AM EDT SAT MAR 21 2015 AN ARCTIC COLD FRONT WILL MOVE SOUTH FROM CANADA TODAY AND BRING RAIN AND SNOW SHOWERS TO THE NORTH COUNTRY TODAY.
A WEAK COLD FRONT WILL USHER IN COLDER CONDITIONS TO END THE WEEKEND. SO KEPT MENTION OF PRECIPITATION MAINLY ALONG AND NORTH OF I80 AND ALONG THE RIDGES. THE BROAD PIN-WHEELING UPPER LEVEL LOW WILL KEEP OUR AREA ENTRENCHED IN NORTHWEST FLOW ALOFT.
A STATIONARY FRONT CONTINUES TO LINGER ALONG THE NORTH FLORIDA BORDER WITH WEAK HIGH PRESSURE AND A WEAK PRESSURE GRADIENT ACROSS SOUTH FLORIDA AND ADJACENT WATERS. AN UPPER LEVEL RIDGE CONTINUES TO DOMINATE ACROSS THE CENTRAL AND EASTERN GULF AND EXTENDS ACROSS THE FLORIDA PENINSULA. THE MID TO UPPER LEVEL RIDGE ACROSS THE REGION WILL SLOWLY START TO ERODE AND BECOME MORE ZONAL FLOW AS AN UPPER LEVEL TROUGH IS FORECAST TO ENTER THE WESTERN GULF LATER ON SUNDAY. BUT WEAK HIGH PRESSURE AND LACK OF AVAILABLE DEEP MOISTURE WILL CONTINUE ACROSS THE REGION.
AS MODELS AGREE THAT THE CURRENT UPPER LOW IN THE BAJA WILL START ITS DEMISE TOWARDS THE NORTHEAST. THE WEAKENING TROUGH WILL EXIT SUNDAY NIGHT WITH RAIN AND CLOUD COVER EXITING FROM THE NORTHWEST TO SOUTHEAST.
THE RAINFALL LOOKS TO END FROM WEST TO EAST DURING SUNDAY AS THE OPEN WAVE IN THE LARGE UPPER TROUGH SLIDES EASTWARD OVER THE MISSISSIPPI RIVER. THE CURRENT WATER VAPOR SHOWS THE LOW EDGING OVER THE EASTERN EDGE OF THE SEA OF CORTEZ OVERNIGHT AND BEGINNING TO OPEN UP OVER WESTERN MEXICO.
415 AM EDT SAT MAR 21 2015 AN ARCTIC COLD FRONT WILL MOVE SOUTH FROM CANADA TODAY AND BRING RAIN AND SNOW SHOWERS TO THE NORTH COUNTRY TODAY.
High pressure at the surface will nose in here from the west overnight. Drier air on the back side of the trough and this high will force skies to clear and bring about a much nicer Saturday, both sun and temperature-wise.
141 AM CDT SAT MAR 21 2015 DRIER AIR IN THE LOWER LEVELS IS MOVING IN AND CIGS HAVE LIFTED TO VFR AT MOST TAF SITES. A DEEP UPPER LOW CURRENTLY SPINNING OVER BAJA WILL BEGIN TO OPEN UP AND LIFT SLOWLY NORTHEAST TONIGHT THROUGH SATURDAY. THE UPPER LOW IS PROGGED TO MOVE INTO WEST TEXAS SATURDAY EVENING AND LIFT ACROSS NORTH TEXAS SUNDAY AS AN OPEN WAVE TROUGH. THE GFS AND NAM ARE IN GOOD AGREEMENT THAT NUMEROUS SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THE UPPER LOW WITH SOME IMPRESSIVE QPF AMOUNTS ACROSS MUCH OF THE AREA SATURDAY NIGHT AND EARLY SUNDAY MORNING. THE UPPER TROUGH WILL EXIT NORTH TEXAS SUNDAY AFTERNOON AND PRECIPITATION WILL COME TO AN END.
A WEAK COLD FRONT WILL USHER IN COLDER CONDITIONS TO END THE WEEKEND. AND AN ACCOMPANYING COLD FRONT WHICH SWEEPS THROUGH DURING THE AFTERNOON. AND BELOW FREEZING. THE BROAD PIN-WHEELING UPPER LEVEL LOW WILL KEEP OUR AREA ENTRENCHED IN NORTHWEST FLOW ALOFT.
A WEAK COLD FRONT WILL USHER IN COLDER CONDITIONS TO END THE WEEKEND. SO KEPT MENTION OF PRECIPITATION MAINLY ALONG AND NORTH OF I80 AND ALONG THE RIDGES.
THE UPPER LEVEL PATTERN WILL FEATURE A RIDGE DEVELOPING NORTHWARD ACROSS THE INTERMOUNTAIN WEST AND INTO WYOMING. OVERNIGHT LOWS WILL FALL INTO THE 30S AND 40S ACROSS THE LOWER ELEVATIONS. THE HIGH PRESSURE TO THE SOUTHWEST WILL BEGIN BUILDING INTO COLORADO BY SATURDAY AFTERNOON. EXPECT WARMING ACROSS THE LOWER ELEVATIONS WITH MOST AREAS REACHING INTO THE 70S BY AFTERNOON. SHOULD BE DRY UNDER UPPER LEVEL RIDGING.
TEMPERATURES TONIGHT SHOULD REMAIN WELL ABOVE FREEZING AHEAD OF A COLD FRONT.
101 AM EDT SAT MAR 21 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL DROP SOUTH ACROSS THE AREA ON SATURDAY.
THIS JET WILL BEGIN TO SHIFT EAST TODAY AS THE CLOSED LOW OVER NORTHWEST MEXICO SHIFTS EAST. UPPER TROUGH SHOULD BE EJECTING OFF TO THE EAST FAIRLY RAPIDLY SUNDAY MORNING.
645 AM EDT SAT MAR 21 2015 LOW PRESSURE APPROACHING FROM THE WEST TODAY WILL PUSH INTO NORTHERN NEW ENGLAND BY THIS EVENING AND WILL DRIVE AN ARCTIC COLD FRONT THROUGH THE REGION.
302 AM CDT Sat Mar 21 2015 High pressure across the region will allow for a dry and warm day. An upper level trough will move across the southern plains but should have little impacts for the region. Sunday will see a continuation of the nice Spring weekend as an upper level ridge builds over the western CONUS.
THEN DRIER AIR AND HIGH PRESSURE BUILDING EAST WILL SET THE STAGE FOR A NICE START TO SPRING WITH SKIES CLEARING THROUGH THE DAY. A FEW CLOUDS ASSOCIATED WITH A DRY COLD FRONT WILL DROP SOUTH LATER TODAY INTO TONIGHT. THE PRIMARY AFFECT WILL BE THE CHANGE IN WINDS FROM W TO MORE NORTHERLY WHICH WILL USHER IN SLIGHTLY COOLER AIR ACROSS PORTIONS OF EASTERN KENTUCKY. SUNDAY WILL BE COOLER FROM NE TO SW WITH TEMPS GENERALLY IN THE UPPER 50S TO LOWER 60S. BEFORE THE PATTERN BECOMES MORE AMPLIFIED LATE IN THE WEEK WITH A DEEP TROUGH BECOMING ESTABLISHED AGAIN OVER THE EASTERN U.
AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP OVER THE LOWER MISSISSIPPI VALLEY DURING SUNDAY WITH WEAK HIGH PRESSURE REMAINING OVER THE REGION.
658 AM EDT SAT MAR 21 2015 HIGH PRESSURE WILL BUILD SOUTH OF THE REGION WITH A SOUTHERLY FLOW ALLOWING FOR DRY AND WARM CONDITIONS TODAY. A COLD FRONT WITH LIMITED MOISTURE WILL PASS THROUGH LATE TODAY OFFERING AN INCREASE IN CLOUDS. COOLER AIR WILL SETTLE IN BEHIND THIS FRONT INTO THE FIRST OF THE WEEK. EXPECT HIGHS SUNDAY TO RANGE FROM THE LOWER 40S NORTH TO THE MID/UPR 50S FAR SOUTH.
237 AM EDT SAT MAR 21 2015 A COLD FRONT WILL MOVE ACROSS THE REGION ON SATURDAY BRINGING MIXED RAIN AND SNOW SHOWERS.
A WEATHER DISTURBANCE CROSSING THE NORTHERN ROCKIES WILL NUDGE A WEAK COLD FRONT THROUGH NORTHERN UTAH TODAY.
338 AM CDT SAT MAR 21 2015 WIDESPREAD MODERATE RAINFALL IS OCCURRING ACROSS MUCH OF CENTRAL TEXAS THIS MORNING AHEAD OF A STRONG UPPER LOW THAT WILL CROSS THE REGION LATER TONIGHT. WATER VAPOR IMAGERY SHOWS THE UPPER TROUGH SLOWLY MOVING NORTHEAST INTO NORTH-CENTRAL MEXICO WITH A LARGE PLUME OF MOISTURE STREAMING NORTHEAST ACROSS TEXAS. AS THE UPPER TROUGH BEGINS TO LIFT NORTHEAST WE SHOULD BEGIN TO SEE A SHIFT IN THE PRECIPITATION ACROSS CENTRAL TEXAS OFF TO THE NORTHEAST AS WELL. ADDITIONAL RAINFALL IS EXPECTED TO DEVELOP CLOSER TO THE TRACK OF THE UPPER LOW LATER THIS EVENING AND TONIGHT. ALL OF THE RAINFALL SHOULD TAPER OFF FROM WEST TO EAST DURING THE MORNING HOURS ON SUNDAY WITH TEMPERATURES WARMING INTO THE LOWER 70S BY AFTERNOON.
In addition, MVFR visibility in fog will accompany the lower ceilings.
CURRENT SURFACE ANALYSIS PLACES LOW SETTLING DOWN THROUGH EASTERN SOUTH DAKOTA WITH COLD FRONT SETTLING THROUGH SOUTHEAST INTO WEST CENTRAL NORTH DAKOTA.
356 AM CDT SAT MAR 21 2015 07Z SURFACE ANALYSIS HAS LOW PRESSURE OVER THE TEXAS COASTAL BEND. WITH A SLOW-MOVING COLD FRONT OR NEAR STATIONARY BOUNDARY DRAPED PARALLEL TO THE COAST. BUT THE TARGETED AREA WHERE THE HIGHEST QPF IS CURRENTLY FOCUSED IS FROM THE WESTERN CENTRAL FORECAST AREA NORTHEAST INTO THE NORTHEASTERN CWA. OR ROUGHLY ALONG AND NORTH OF THE HIGHWAY 59 CORRIDOR. AS THE MAIN WESTERN UPPER TROUGH PULLS NORTHEAST UP AND OVER TEXAS THIS WEEKEND. AS THE 5H TROUGH LIFTS OUT INTO WEST CENTRAL TEXAS LATTER TODAY. OTHER THAN THE FACT THAT THERE MAY BE BETTER LL CONVERGENCE ALONG THIS STATIONARY/ NEAR COASTAL TROUGH.
325 AM CDT SAT MAR 21 2015 A RIDGE OF HIGH PRESSURE IS EXPECTED TO BUILD INTO THE AREA TODAY. THE RIDGE BUILDING INTO THE AREA WILL KEEP THE NORTHWEST WINDS GOING IN THE 5 TO 10 MPH RANGE. THIS EVENING TO REMAIN MOSTLY CLEAR AS THE RIDGE SETTLES MORE FULLY INTO THE AREA.
SURFACE COLD FRONT/TROUGH HAS PASSED THROUGH THE NORTHLAND AND IS MOVING INTO THE GREAT LAKES THIS AFTERNOON WITH COLD AND DRY AIR FILTERING IN ON THE BACK SIDE OF THE SYSTEM. BUT HAS BEEN MET WITH A MUCH COOLER AIR MASS THAN IN THE DAKOTAS. A ROBUST AREA OF HIGH PRESSURE WILL DOMINATE THE REGION MOST OF THE DAY SATURDAY WITH DRY CONDITIONS AND MOSTLY SUNNY SKIES.
A WEAK COLD FRONT WILL USHER IN COLDER CONDITIONS TO END THE WEEKEND. DRIZZLE/FOG CONTINUES ALONG SOME OF THE RIDGES IN THE EAST. AND AN ACCOMPANYING COLD FRONT WHICH SWEEPS THROUGH DURING THE AFTERNOON. AND BELOW FREEZING. THE BROAD PIN-WHEELING UPPER LEVEL LOW WILL KEEP OUR AREA ENTRENCHED IN NORTHWEST FLOW ALOFT.
SFC TEMPS LOOK TO BE SUB FREEZING BY THIS TIME. MAKING FREEZING RAIN/DRIZZLE THE PCPN TYPE. WINDS WILL BE GUSTY OUT OF THE NORTH FOR A BRIEF PERIOD AS WELL AS THE COLD FRONT MOVES THROUGH EARLY THIS MORNING.
THIS WILL RESULT IN SLIGHTLY COOLER TEMPERATURES RELATIVE TO AREAS FURTHER NORTHWEST AWAY FROM THE THICKEST CIRRUS. AS ANOTHER CLOSED LOW OVER WESTERN MEXICO MOVES INTO TEXAS. LOW AMPLITUDE RIDGING AND RISING MID LEVEL HEIGHTS WILL RESULT IN MUCH WARMER TEMPERATURES.
WEAK UPPER RIDGING WILL HOLD ACROSS THE REGION MOST OF THIS PERIOD KEEPING MILD AND MAINLY DRY WEATHER IN PLACE OVER THE CWA. WARMEST TEMPS WILL BE SATURDAY AS WEAK LEE TROUGHING OVER THE HIGH PLAINS SETS UP DOWNSLOPE FLOW.
403 AM MDT SAT MAR 21 2015 HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE GREAT BASIN OVER THE NEXT COUPLE OF DAYS. HIGH TEMPERATURES ARE EXPECTED TO RISE A COUPLE OF DEGREES EACH DAY THROUGH SUNDAY THANKS TO SLIGHTLY WARMER AIR DEVELOPING ALOFT AND LIGHT DIURNAL WINDS. SOME OF WHICH WILL GET CAUGHT UP IN THE RIDGING TODAY FOR SOME HIGH CLOUD COVER THIS AFTERNOON.
PERHAPS UP TO INCH OF SNOW IN THE HIGHER ELEVATIONS OF THE COTEAU/SISSETON HILLS.
558 AM CDT SAT MAR 21 2015 THE COLD FRONT THAT CAME THROUGH THE REGION YESTERDAY WAS STRETCHED FROM KANSAS CITY TO MILWAUKEE EARLY THIS MORNING. THE AIRMASS WITH THIS HIGH PRESSURE IS VERY DRY. WE WILL QUICKLY SEE MIDLEVEL CLOUDS DIVE SOUTHEAST FROM NODAK TOWARD SW WI LATE THIS MORNING INTO THE AFTERNOON AS WE GET INTO A TIGHT MIDLEVEL TEMP GRADIENT BETWEEN A VERY DEEP AND COLD H5 LOW THAT WILL BE MOVING OVER THE SOUTHERN SHORE OF HUDSON BAY AND A FLATTENING OUT UPPER RIDGE THAT WILL BE MOVING INTO THE NRN HIGH PLAINS. THEREFORE MANIPULATED THE SNOW RATIO GRIDS TO BE ON THE HIGHER END OF GUIDANCE.
The cold frontal passage expected today has been steadily weakening in how much dynamics it will present as it crosses the region.
302 AM EDT SAT MAR 21 2015 A COLD FRONT OVER THE CENTRAL GREAT LAKES WILL MOVE SOUTHEAST ACROSS THE LOCAL AREA TODAY.
UPPER TROUGH MAKING ITS WAY ONTO THE OREGON COAST THIS MORNING AS SEEN IN SATELLITE PRODUCTS. FORECAST MODELS HAVE KEPT WITH TRACKING THE LOW THROUGH WASHINGTON AND THE ID PANHANDLE DURING THE DAY. NORTHERN MALHEUR AND THE LOWER TREASURE VALLEY IN IDAHO COULD BE THE EXCEPTION SHOULD A WEAK LINE OF SHOWERS DEVELOP AS A COUPLE OF THE HIGHER RESOLUTION MODELS ARE SUGGESTING.
RANGED FROM THE LOW TO MID 70S AND AS LOW AS 65 IN BIG PINE KEY. HIGH PRESSURE WILL PERSIST ACROSS OUR AREA THROUGH SUNDAY. TEMPERATURES WILL CONTINUE TO BE A COUPLE OF DEGREES WARMER THAN NORMAL FOR THIS TIME OF THE YEAR.
1105 PM MDT FRI MAR 20 2015 HIGH PRESSURE WILL BE OVER THE AREA WITH DRY AND GENERALLY MILD CONDITIONS.
UPPER LEVEL LOW HAS BEEN SLOW TO KICK OUT. COLD FRONT PUSHED INTO THE NORTHERN PART OF THE AREA QUICKER THAN EXPECTED. UPPER LEVEL TROUGH WILL BE LIFTING OUT OF THE AREA LATER TODAY AND ON SUNDAY.
PLACING OUR REGION IN A MOIST SOUTHWESTERLY UPPER LEVEL FLOW REGIME AHEAD OF THE UPPER LOW NOW OVER SOUTHERN CALIFORNIA.
HIGH PRESSURE WILL CONTINUE TO BUILD OVER THE REGION TONIGHT AND SATURDAY.
QUIET CONDITIONS TONIGHT WITH HIGH PRESSURE IN CONTROL. CHATTANOOGA AIRPORT, TN 25 51 35 53 / 0 10 10 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 21 47 29 50 / 0 0 10 60 OAK RIDGE, TN 22 46 32 48 / 0 10 10 70 TRI CITIES AIRPORT, TN 17 44 26 48 / 0 10 10 60.
639 PM EST FRI JAN 30 2015 LOW PRESSURE WILL INTENSIFY IN THE GULF OF MAINE TONIGHT. THE LOW WILL MOVE TO NEAR THE SOUTHERN TIP OF NOVA SCOTIA EARLY SATURDAY MORNING AND SLOWLY MOVE ACROSS THE MARITIMES THIS WEEKEND.
WATER VAPOR SATELLITE TRENDS INDICATE AN UPPER LEVEL TROUGH LOCATED ALONG THE WEST COAST THIS EVENING. SOME HIGH CLOUDS ARE BEGINNING TO MOVE INTO THE LOWER MISSISSIPPI VALLEY. /ISSUED 309 PM CST FRI JAN 30 2015/ HIGH PRESSURE WILL REMAIN OVER THE MIDSOUTH TONIGHT. THE HIGH WILL SHIFT EAST ALLOWING WINDS TO TURN AROUND TO THE SOUTH. THIS WILL ALLOW HIGHS TO GET INTO THE LOWER TO MID 50S IN MUCH OF THE AREA EVEN WITH AN EXPECTED INCREASE IN CLOUD COVER AHEAD OF THE NEXT SYSTEM.
634 PM EST FRI JAN 30 2015 HIGH PRESSURE WILL MOVE SOUTHEAST ACROSS THE OHIO VALLEY TONIGHT AND SATURDAY PROVIDING FAIR WEATHER ACROSS OUR AREA. WITH HIGHS SATURDAY IN THE LOWER TO MIDDLE 30S.
/ISSUED 417 PM CST FRI JAN 30 2015/ LATEST UPPER AIR ANALYSIS/WATER VAPOR SATELLITE IMAGERY SHOWED A DEPARTING UPPER TROF OVER THE ERN CONUS. WITH AN UPSTREAM TROF OVER THE WRN CONUS. AND RIDGING IN BETWEEN FROM THE WRN GOMEX INTO THE CENTRAL PLAINS. HIGH PRESSURE WAS CENTERED OVER THE MID MS RIVER VALLEY. COOLER AND DRIER AIR ACROSS THE REGION TODAY IN THE WAKE OF THE COLD FRONT THAT PASSED THROUGH LAST NIGHT. DRY WEATHER EXPECTED TO CONTINUE INTO SATURDAY AS THE RIDGING SLIDES EASTWARD. THOUGH PACIFIC MSTR WILL BEGIN TO INVADE AS THE UPPER RIDGE GRADUALLY FLATTENS. A NORTHERN STREAM SYSTEM WILL EFFECTIVELY CUT OFF THE BAJA TROF.
A LOW PRESSURE WAS LOCATED OVER CENTRAL COLORADO. LARGE UPPER LEVEL TROUGH WAS LOCATED OVER SOUTHERN CALIFORNIA. A COLD FRONT PUSHES SOUTH FROM THE NORTHWEST.
THE MOST SIGNIFICANT SNOWFALL WILL BE ACROSS THE HIGHEST PEAKS. EXPECT MUCH COOLER DAYTIME TEMPERATURES THIS WEEKEND. UPPER LEVEL TROUGH WILL REMAIN QUASI-STATIONARY OVER THE SWRN CONUS INTO SAT. THIS UPPER LOW WILL THEN FILL AND MOVE SEWD INTO SONORA MEXICO BY EARLY SUN MORNING. A HIGH PRESSURE RIDGE ADJACENT THE WEST COAST MON IS PROGGED TO GRADUALLY MOVE EWD INTO THE INTERMOUNTAIN WEST BY THE LATTER PART OF THE UPCOMING WEEK. WIDESPREAD VALLEY RAIN AND MOUNTAIN SNOW WILL OCCUR INTO SATURDAY AS A LOW PRESSURE SYSTEM MOVES OVER THE AREA. THE MOST SIGNIFICANT SNOWFALL WITH THIS SYSTEM WILL OCCUR ACROSS THE HIGHEST PEAKS OF THE WHITE MOUNTAINS.
WITH HIGH PRESSURE LOCATED OVER THE OH VALLEY REGION. ESPECIALLY IN RIDGE/VALLEY LOCATIONS. AS A STRENGTHENING UPPER TROUGH AXIS LIFTS NEWD OUT OF THE DESERT SW. THIS LOW IS EXPECTED TO STRENGTHEN AS IT INTERACTS MORE WITH THE NORTHERN STREAM WAVE.
AND THEN THE RIDGE WILL RETURN TO THE SILVER STATE. THE FORECAST PERIOD COMMENCES WITH THE LONGWAVE RIDGE OFF THE COAST OF CALIFORNIA AND A CLOSED LOW OVER THE DESERT SOUTHWEST. WITH MOISTURE WRAPPING INTO THE BACKSIDE OF THE LOW PRESSURE CIRCULATION. THE RIDGE WILL MOVE INTO THE GREAT BASIN WITH A VENGEANCE THIS WEEKEND.
EXPECT PARTLY CLOUDY SKIES OVERNIGHT AS HIGH PRESSURE REMAINS IN CONTROL ACROSS THE ARKLAMISS. LOW TEMPS WILL RANGE FROM THE UPPER 20S NORTH TO THE LOWER 30S SOUTH.
DESPITE FREEZING OR ABOVE FREEZING TEMPS AND DWPTS IN THE SOUTHERN VALLEYS. SO CONSIDERING TEMPERATURES IN ALL GUIDANCE WILL BE COOLING BELOW FREEZING OVERNIGHT WE DECIDED TO ISSUE ADVISORIES FOR ABOVE 6500 FEET TO INCLUDE THESE SOUTHERN VALLEYS ON IMPACT BASED CRITERIA. WINDS WILL CHANGE TO NORTHERLY SATURDAY MORNING AS THE UPPER LEVEL TROUGH PASSES. BRINGING DRIER AIR INTO THE REGION AS THE TROUGH PUSHES EAST THROUGHOUT THE DAY.
MOST OF THIS MOISTURE IS STILL CONFINED TO THE LOWEST LAYERS AND WILL TAKE SOME TIME FOR THE VERY DRY AIR ALOFT TO MOISTEN.
A COLD FRONT WILL SLIDE THROUGH THE REGION BUT HANG UP SATURDAY MORNING ACROSS NORTHWEST IOWA AS A SERIES OF WAVES BREAK OFF UPPER LEVEL LOW OVER THE DESERT SOUTHWEST.
417 PM CST FRI JAN 30 2015 LATEST UPPER AIR ANALYSIS/WATER VAPOR SATELLITE IMAGERY SHOWED A DEPARTING UPPER TROF OVER THE ERN CONUS. WITH AN UPSTREAM TROF OVER THE WRN CONUS. AND RIDGING IN BETWEEN FROM THE WRN GOMEX INTO THE CENTRAL PLAINS. HIGH PRESSURE WAS CENTERED OVER THE MID MS RIVER VALLEY. COOLER AND DRIER AIR ACROSS THE REGION TODAY IN THE WAKE OF THE COLD FRONT THAT PASSED THROUGH LAST NIGHT. DRY WEATHER EXPECTED TO CONTINUE INTO SATURDAY AS THE RIDGING SLIDES EASTWARD. THOUGH PACIFIC MSTR WILL BEGIN TO INVADE AS THE UPPER RIDGE GRADUALLY FLATTENS. A NORTHERN STREAM SYSTEM WILL EFFECTIVELY CUT OFF THE BAJA TROF.
A RELAXED RIDGE FROM THE SOUTHERN PLAINS AND WESTERN GULF COAST TO THE NORTHERN HIGH PLAINS. AND A TROUGH FROM HUDSON BAY TO THE COASTAL WATERS OF THE SOUTHEAST U. LOW PRESSURE SOUTHEAST OF NEW ENGLAND TRAILED A COLD FRONT THAT ARCED SOUTH AND SOUTHWEST TO SOUTHERN FL THEN STRETCHED WESTWARD OVER THE GULF OF MEXICO. OVERNIGHT THE UPPER RIDGE EASES EASTWARD AS THE TROUGH SHIFTS OUT OVER THE OPEN ATLANTIC. CURRENT TEMPERATURES IN THE LOWER 50S TO MID 60S. DRY COLD FRONT EXITS THIS EVENING. THE SMALL CRAFT ADVISORY WILL CONTINUE THROUGH EARLY SATURDAY MORNING FOR THE NEAR SHORE AND OFFSHORE WATERS FOR THIS WIND INCREASE RIGHT BEHIND THE COLD FRONT. THE HIGH PRESSURE CENTER WILL SETTLE SOUTHWARD AND ALLOW THE PRESSURE GRADIENT TO RELAX LATER SATURDAY AFTERNOON.
THIS LOW IS EXPECTED TO STRENGTHEN AS IT INTERACTS MORE WITH THE NORTHERN STREAM WAVE.
High pressure dominates the Southern Appalachians tonight. Light winds and clear skies will allow temps to drop at or just below the freezing mark over our northernmost zones and the normally colder locations. Otherwise, mins will be in the lower to mid 30s except near 40 along the coast.
659 PM EST FRI JAN 30 2015 HIGH PRESSURE WILL BUILD IN THROUGH SATURDAY.
648 PM EST FRI JAN 30 2015 HIGH PRESSURE MOVING INTO THE FORECAST AREA FROM THE WEST TONIGHT WILL BE OVER THE AREA SATURDAY AND SATURDAY NIGHT.
941 PM EST FRI JAN 30 2015 LOW PRESSURE WILL INTENSIFY IN THE GULF OF MAINE TONIGHT. THE LOW WILL MOVE TO NEAR THE SOUTHERN TIP OF NOVA SCOTIA EARLY SATURDAY MORNING AND SLOWLY MOVE ACROSS THE MARITIMES THIS WEEKEND.
WE WILL HAVE SOME WARM TEMPERATURES AND A NON DIURNAL TEMPERATURE TREND LINGERING WELL INTO THE EVENING WITH THE WARM AIR ADVECTION ONGOING UNTIL THE LATE NIGHT COLD FRONT MOVES THROUGH. BEHIND THE COLD FRONT WINDS TURNING NORTHWEST AND COLDER TEMPERATURES AT 850MB SHOULD KICK OFF SOME LAKE EFFECT SNOWS ALONG THE SOUTH SHORE.
MOISTURE MOVING AROUND THE RIDGE OF HIGH PRESSURE ALOFT WILL KEEP THE SKIES MOSTLY CLOUDY. BKN TO OVC HIGH CLOUDS WILL PERSIST AND CIGS WILL GRADUALLY LOWER THROUGH THE TAF PERIOD AS LOW/MID LVL MOISTURE INCREASES AHEAD OF AN APPROACHING UPPER TROUGH. AND SHOULD CONTINUE TO DO SO TONIGHT AS A SLUG OF ELEVATED PACIFIC MOISTURE SPILLS E INTO THE REGION AHEAD OF THE SRN CA/NRN BAJA CLOSED LOW. SFC RIDGING OVER THE MID MS VALLEY SW INTO N TX THIS AFTERNOON REMAINS PROGGED TO GRADUALLY SHIFT E OVERNIGHT AS WELL. SHOULD START TO SEE THE LOW LEVEL MOISTURE TO RETURN TO E TX/WCNTRL LA SATURDAY AFTERNOON.
THE UPPER LOW IN SOUTHERN CALIFORNIA WILL CONTINUE TO STRENGTHEN AND LIFT EASTWARD OVERNIGHT AS A STRONG RIDGE OVER THE PACIFIC WILL BUILD BACK INTO THE AREA. THE RIDGE WILL BUILD INTO THE AREA OVER THIS WEEKEND AND BRING DRY AND SUNNY CONDITIONS ALONG WITH WELL ABOVE NORMAL TEMPERATURES AGAIN.
|MODELS SHOW A SPLIT FLOW OVER THE WESTERN HALF OF THE UNITED STATES SATURDAY NIGHT WITH A LARGE UPPER LOW OVER NORTHERN MEXICO AND A DEVELOPING UPPER TROUGH OVER THE NORTHERN ROCKIES AND GREAT PLAINS STATES. THIS TROUGH WILL SEND A SHORT WAVE AND ASSOCIATED COLD FRONT INTO NORTHEASTERN COLORADO LATE SATURDAY EVENING.
WATER VAPOR LOOP AND LATEST RAP MODEL INITIALIZATIONS SHOWED A CLOSED LOW OVER THE CALIFORNIA/ARIZONA BORDER REGION EARLY THIS AFTN.