Aikyam-Lab/Synoptic-Bench huggingface dataset:
CURRENT FORECAST IS ON TRACK WITH HIGH PRESSURE MOVING IN AND TEMPERATURES RAPIDLY FALLING. UPPER LEVEL TROUGH AXIS PUSHING SOUTH ACROSS THE NORTHERN PLAINS TODAY. THE UPPER TROUGH AXIS WILL BE ACCOMPANIED BY A FEW AREAS OF LOW CLOUDS OVER THE NEXT 12 HOURS OR SO. WESTERLY WINDS ORIGINATING OUT OF THE HIGH WILL ADVECT DRY AIR INTO WESTERN AND CENTRAL NORTH DAKOTA. RETURN FLOW AND WAA FOR FRIDAY WILL RESULT IN WARMER DAYTIME TEMPERATURES ACROSS THE LOCAL AREA.
512 PM CST THU NOV 26 2015 THE WINTER WEATHER ADVISORY FOR FREEZING DRIZZLE WAS CANCELED WITH THE AFTERNOON FORECAST PACKAGE AS NO ADDITIONAL SNOW OR DRIZZLE ACCUMULATIONS ARE EXPECTED. THE PRECIPITATION THREAT CONTINUES TO SHIFT SOUTH AND EAST AS THE LOWER AND MID LEVELS OF THE TROPOSPHERE UNDERGOES A DRYING TREND. COLD TEMPERATURES ARE FORECAST IN A CLEARING POST COLD FRONT REGIME. WILL CONTINUE TO WATCH THE PROGRESSION OF THE GREAT BASIN UPPER LOW ON FRIDAY AS IT RELUCTANTLY INCHES EAST TOWARD THE CENTRAL ROCKIES. CANADIAN HIGH PRESSURE AND DRY AIR WILL DOMINATE THE PATTERN. ONSHORE FLOW ALONG THE TEXAS GULF COAST WILL BEGIN FEEDING MOISTURE NORTHWARD ONTO THE HIGH PLAINS.
THE COLD FRONT WILL PUSH THROUGH THE NRN TERMINALS BY MIDDAY AND EARLY AFTERNOON FRI.
618 PM EST THU NOV 26 2015 STRONG HIGH PRESSURE WEDGED FROM THE CENTRAL APPALACHIANS TO THE CANADIAN MARITIMES WILL MAINTAIN DRY WEATHER WITH MODERATING TEMPERATURES INTO FRIDAY.
1014 PM EST THU NOV 26 2015 STRONG HIGH PRESSURE WEDGED FROM THE CENTRAL APPALACHIANS TO THE CANADIAN MARITIMES WILL MAINTAIN DRY WEATHER WITH MODERATING TEMPERATURES INTO FRIDAY.
UNCERTAINTIES OVER CRITICAL SURFACE TEMPS IN THE ROLLING PLAINS ARE NO LONGER AS MANY AS BEFORE GIVEN FREEZING TEMPS ALREADY UPSTREAM IN THE EASTERN TX PANHANDLE. FASTER FROPA AND CONSISTENT MOS GUIDANCE INDICATING FALLING TEMPS TO AOB FREEZING IN THE ROLLING PLAINS AFTER MIDNIGHT. THERE IS SOME CONCERN THAT THE FREEZING RAIN AMOUNTS MAY BE TEMPERED BY A DEEPER SUB-FREEZING COLUMN AS SHOWN BY RECENT RUNS OF THE RAP AND NAM - EFFECTIVELY SUPPORTING MORE ICE PELLETS /SLEET/ THAN FREEZING RAIN. THESE MODELS BOTH HAVE FREEZING DEPTHS OF 2000 TO 2500 FEET THICK AT LUBBOCK WHICH ARE WELL ABOVE THE 1500 FEET OR SHALLOWER WINDOW IDEAL FOR FREEZING RAIN.
1006 PM EST THU NOV 26 2015 MILD TEMPERATURES AND BREEZY CONDITIONS CONTINUE TONIGHT WITH INCREASING CLOUDS AHEAD OF A COLD FRONT THAT WILL ADVANCE THROUGH THE REGION FRIDAY AFTERNOON RESULTING IN RAIN SHOWERS THROUGH FRIDAY NIGHT.
239 PM PST THU NOV 26 2015 Chilly temperatures and clear skies are expected through at least Friday as strong high pressure builds over the Pacific Northwest.
MODELS SEEM TO BE TRENDING TOWARD A STRONGER W COAST UPPER RIDGE ON MON. MODELS APPEAR TO BE LATCHING ONTO A TROF OVER THE EXTREME E PAC. A HIGH PRESSURE SYSTEM WILL STRENGTHEN ACROSS THE WEST CENTRAL UNITED STATES THIS WEEKEND AS A LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT SLOWLY APPROACHES THE NORTHWEST UNITED STATES COAST.
522 PM EST THU NOV 26 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE AREA THROUGH FRIDAY NIGHT BEFORE WEAKENING AS A COLD FRONT APPROACHES FROM THE NORTHWEST THIS WEEKEND. HIGH PRESSURE WILL REMAIN IN CONTROL AT THE SURFACE WITH THE UPPER RIDGE AXIS OVERHEAD.
TRANSITION TO FREEZING RAIN AND SLEET WILL OCCUR FIRST ACROSS KGAG/KWWR THIS EVENING AND SPREAD SOUTH AND EASTWARD OVERNIGHT AND TOMORROW. /ISSUED 447 PM CST THU NOV 26 2015/ ALTHOUGH THE FREEZING LINE HELD IN THE WESTERN OKLAHOMA PANHANDLE FOR A WHILE. SUB-FREEZING TEMPERATURES WILL MOVE INTO HARPER COUNTY THIS EVENING WITH THE TRANSITION BEGINNING TO FREEZING RAIN. DID NOT GET TOO FANCY WITH THE WEATHER GRIDS AND USED A COMBINATION OF FREEZING RAIN AND SLEET WHERE WINTER PRECIPITATION IS EXPECTED. WE ARE FORECASTING THE MIX OR TRANSITION TO FREEZING RAIN AND/OR SLEET INTO AT LEAST THE WESTERN PORTION OF THESE COUNTIES TOMORROW. GIVEN THE HIGH PRECIPITABLE WATER CONTENT AND THE NATURE OF THE RAIN SO FAR.
THE LONG ADVERTISED UPPER LOW REMAINS LOCKED OVER THE GREAT BASIN WITH A VORTICITY SPOKE CARVING DOWN ALONG THE CENTRAL CA COAST THIS EVENING. 24-HOUR TRENDS INDICATE OBS ARE RANGING 5 TO 10 DEGREES COOLER AND DRIER THAN THIS TIME YESTERDAY. THE CENTER OF THE LOW OVER NEVADA AND UTAH. OVERNIGHT LOWS WILL BE AROUND 5-8 DEGREES COLDER FOR THE LOWER DESERT SITES.
925 PM CST THU NOV 26 2015 The cold front is slightly ahead of schedule as it plunges southeast across the area this evening. The temperature gradient behind the front is also a bit sharper than forecast, although the location of the freezing line is about right on that suggested by recent runs of the NAM12.
341 PM MST THU NOV 26 2015 THE CLOSED LOW CONTINUES TO REMAIN OVER THE GREAT BASIN AND WILL RETROGRADE WESTWARD FRIDAY.
245 PM PST THU NOV 26 2015 A STORM SYSTEM WILL REMAIN ANCHORED OVER THE GREAT BASIN THROUGH THE HOLIDAY WEEKEND AND BRING LITTLE MORE THAN ISOLATED SNOW SHOWERS TO THE HIGHER ELEVATIONS OF THE SIERRA. WILL SEE ANOTHER NIGHT OF FREEZING TEMPERATURES ACROSS THE SAN JOAQUIN VALLEY AS WIDESPREAD MIN TEMPS REACH BELOW 32 DEGREES. WHILE DEW POINTS IN THE LOWER 30S AND 20S WERE CURRENTLY BEING OBSERVED IN THE SACRAMENTO VALLEY. OMEGA BLOCKING TYPE PATTERN SETTING-UP WITH WEAK IMPULSES RIDING AROUND THE UPPER LOW OVER THE GREAT BASIN/FOUR CORNERS AREA.
955 PM EST THU NOV 26 2015 HIGH PRESSURE HOLDS ON INTO FRIDAY WITH UNUSUALLY MILD AIR.
/ISSUED 249 PM CST THU NOV 26 2015/ PRESSURE GRADIENT BETWEEN STRONG HIGH PRESSURE OVER THE NORTHEAST U. AND DEVELOPING LOW PRESSURE OVER COLORADO HAS INCREASED THIS AFTERNOON OVER THE FORECAST AREA. RADAR ALSO SHOWS SPOTTY SHOWERS DEVELOPING IN THE LOW LEVEL JET AND MOVING FROM THE COASTAL WATERS ONSHORE. A COLD FRONT WILL MOVE INTO THE REGION ON FRIDAY.
Low temperatures are expected to range from the lower 50s north to to near 60 along the coast.
Clouds banked along the eastern side of the Sierra crest in closer proximity to upper level low. Otherwise dry weather will prevail through the weekend outside a few snow showers near the Sierra crest (mainly south of Lake Tahoe) from time to time due to wrap-around moisture from lingering upper level low over the Great Basin. Cooler air will continue to filter into the area with temperatures a few degrees below normal. Overnight lows will hover near the freezing mark in the Valley which may lead to areas of frost, especially in outlying areas.
244 PM PST THU NOV 26 2015 Chilly temperatures and clear skies are expected through at least Friday as strong high pressure builds over the Pacific Northwest.
925 PM CST THU NOV 26 2015 WARM AND CLOUDY EVENING WITH TEMPS IN THE LOWER 70S AREAWIDE.
DEEP SOUTH TEXAS WILL RESIDE ON THE NORTH SIDE OF A MID LEVEL RIDGE AXIS STRETCHING FROM NORTHERN MEXICO INTO THE CENTRAL GULF OF MEXICO AND INTO THE SOUTHEAST UNITED STATES. UPSTREAM TO THE NORTHWEST WILL BE A MEANDERING MID/UPPER CLOSED LOW ACROSS THE INTERMOUNTAIN WEST. TROPICAL CYCLONE SANDRA WILL MOVE NORTHWARD TOWARD BAJA CALIFORNIA AND WEAKEN AS IT TURNS NORTHEASTWARD FRIDAY.
THE STRONG NORTHEAST TO EAST BREEZES ARE DUE TO A ROBUST AND EXPANSIVE HIGH PRESSURE SYSTEM CENTERED EAST OF NOVA SCOTIA. TEMPERATURES ARE IN THE LOWER 70S AND SKIES ARE MOSTLY CLEAR. AN UPPER LEVEL LOW JUST TO OUR SOUTHEAST IS WORKING ON AN INVERTED LOWER TROPOSPHERIC TROUGH NORTH OF HAITI. STRONG HIGH PRESSURE OVER THE NORTHWEST ATLANTIC WILL CONTINUE TO MOVE EASTWARD THROUGH THE WEEKEND. ANOTHER HIGH PRESSURE SYSTEM WILL BUILD ACROSS THE SOUTHEASTERN UNITED STATES FRIDAY.
616 PM EST THU NOV 26 2015 DRY WEATHER AND WARMER TEMPERATURES CAN BE EXPECTED THROUGH FRIDAY.
Also, an arctic cold front will move south across the area late tonight and Friday. As the large potent upper low remains stationary across the southwest U.
/ISSUED 250 PM CST THU NOV 26 2015/ HIGH PRESSURE CENTERED OFF THE MAINE COAST THIS AFTERNOON WITH THE AXIS OF THE HIGH STRETCHING SOUTHWEST INTO THE NORTHERN GULF OF MEXICO. LOW PRESSURE OVER WISCONSIN WITH A COLD FRONT INTO THE TEXAS PANHANDLE. RIDGING OVER THE WESTERN GULF OF MEXICO. WITH AN UPPER LOW OVER THE GREAT BASIN. TEMPERATURES HAVE WARMED MAINLY INTO THE 70S ACROSS THE AREA WITH DEW POINTS IN THE LOWER AND MIDDLE 60S. WITH UPPER LOW REMAINING OVER THE GREAT BASIN. COLD FRONT WILL LOSE ITS PUSH EASTWARD AND BECOME STATIONARY OVER WESTERN LOUISIANA OVER THE WEEKEND.
617 PM EST THU NOV 26 2015 MILD TEMPERATURES AND BREEZY CONDITIONS CONTINUE TONIGHT WITH INCREASING CLOUDS AHEAD OF A COLD FRONT THAT WILL ADVANCE THROUGH THE REGION FRIDAY AFTERNOON RESULTING IN RAIN SHOWERS THROUGH FRIDAY NIGHT.
552 PM EST THU NOV 26 2015 HIGH PRESSURE WILL CONTINUE TO RIDGE INTO THE AREA THROUGH FRIDAY NIGHT BEFORE WEAKENING AS A COLD FRONT APPROACHES FROM THE NORTHWEST THIS WEEKEND. HIGH PRESSURE WILL REMAIN IN CONTROL AT THE SURFACE WITH THE UPPER RIDGE AXIS OVERHEAD.
UPPER LOW WILL CONTINUE ALONG ITS PATH DIGGING INTO SOUTHERN CALIFORNIA AND THE DESERT SOUTHWEST DURING THE PERIOD. WITH HIGHS HITTING IN THE LOWER 90S TODAY AND TOMORROW.
321 AM EDT THU MAY 7 2015 A WARM FRONT ACROSS CENTRAL OHIO WILL DRIFT NORTH OVER THE LOCAL AREA TODAY AS WEAK HIGH PRESSURE BUILDS OVER THE MID ATLANTIC STATES. THE WEAK HIGH PRESSURE WILL REMAIN NEARLY STATIONARY INTO FRIDAY. IT APPEARS THIS LOWER CLOUD IS GOING TO MAKE A RUN FOR CRAWFORD AND ERIE COUNTIES THIS MORNING. SURFACE DEWPOINTS WILL CONTINUE TO CREEP UP TODAY AS THE SURFACE WARM FRONT LIFTS NORTH ACROSS THE AREA.
MAINLY OVER THE HIGHER TERRAIN. CURRENT IR SATELLITE IMAGERY SHOWING OVERALL LACK OF CLOUDS AS RIDGING ALOFT IS MAXIMIZING EARLY THIS MORNING. IS GETTING DAMMED UP AGAINST THE HIGHER TERRAIN BY LIGHT SOUTH-SOUTHEASTERLY FLOW. ANOTHER MOSTLY DRY AND SUNNY DAY IS ON TAP AS THE UPPER-LEVEL RIDGE STICKS AROUND. THIS WILL GIVE BIRTH TO DIURNALLY DRIVEN CONVECTIVE SHOWERS/THUNDERSTORMS OVER THE ELEVATED HEATING SURFACES OF THE RIDGES. ANOTHER DRY AND MILD NIGHT IS EXPECTED WITH TEMPERATURES A FEW DEGREES WARMER THAN CURRENT LOW TEMPERATURES. TAX THE STORY WILL REMAIN MUCH THE SAME THROUGH THE SHORT TERM AS THE REGION REMAINS UNDER THE INFLUENCE OF A BUILDING UPPER RIDGE.
THE MAIN UPPER CIRCULATION WITHIN THE LONGWAVE TROF IS LOCATED OVER WESTERN NEBRASKA. MUCH OF THE REST OF THE SHORT TERM FORECAST PERIOD THROUGH FRIDAY NIGHT SHOULD BE DRY WHILE COOLER. DRYING OUT THE LOW LEVEL MOISTURE. AND TURNING TEMPERATURES A TOUCH COOLER THAN THE PAST FEW DAYS.
NON-TROPICAL LOW PRESSURE SYSTEM OVER THE WESTERN ATLANTIC OFF THE SOUTHEAST U. SO HAVE FAVORED THE HIGHER MAV GUIDANCE VALUES WITH FORECAST HIGHS IN THE UPPER 80S INLAND FROM THE IMMEDIATE COAST. AND HAVE CONTINUED THE TRENDS OF THE MODELS FORECASTING SLIGHTLY COOLER LOWS TONIGHT.
402 AM CDT THU MAY 7 2015 FAIRLY ACTIVE WEATHER PATTERN TO CONTINUE FOR THE NEXT FEW DAYS AS A DEEP UPPER LEVEL WRN US TROF AND ASSOCIATED STRONG CLOSED LOW ORGANIZE OVER THE SWRN STATES. MOISTURE WILL CONTINUE TO INCREASE ACROSS THE REGION WELL IN ADVANCE OF THE UPPER LEVEL LOW. THE UPPER LEVEL CLOSED LOW EJECTS NEWD ON A PROJECTED PATH SUCH THAT PARTS OF THE FCST AREA MAY GET DRY SLOTTED.
THE UPPER LEVEL LOW PRESSURE AREA OVER THE PACIFIC NORTHWEST WILL SEPARATE FROM THE MAIN UPPER TROUGH OVER WESTERN CANADA THROUGH THE PERIOD AND MOVE INTO THE SOUTHWESTERN UNITED STATES. TEMPERATURES THERE WILL LIKELY REMAIN ABOVE FREEZING IN THE VALLEYS, SO SNOW ACCUMULATION IS NOT EXPECTED THERE. THE UPPER LOW WILL THEN LINGER OVER THE SOUTHWESTERN CONUS INTO FRIDAY, WITH ITS MAIN INFLUENCE BEING A CONTINUED, THOUGH NOT AS SUBSTANTIAL, FEED OF GULF MOISTURE. THE MAIN TROUGH WILL MOVE EAST ACROSS CANADA DURING THIS TIME, SPREADING THE CHANCE FOR SHOWERS FROM SOUTHWEST MONTANA INTO CENTRAL MONTANA. THE MORE NORTHERLY FLOW ALOFT IN THE WAKE OF THE TROUGH WILL ALSO BRING A SLIGHT CHANCE OF SHOWERS TO THE ROCKY MOUNTAIN FRONT AND HI-LINE AREAS.
251 AM CDT THU MAY 7 2015 UNDER MOSTLY CLR SKIES TEMPS WERE RANGING BETWEEN 55 AND 60 DEGREES WITH DEWPOINTS IN THE LOW/MID 50S. A LARGE AREA OF HIGH PRESSURE WILL CONTINUE TO PROVIDE FOR MOSTLY SUNNY SKIES/WARM TEMPS TODAY. HOWEVER WITH INCREASING MOISTURE IN THE LOW/MID LEVELS THERE COULD BE AN ISOLATED AFTN/EVENING SHRA/TSRA.
252 AM PDT THU MAY 7 2015 High pressure will gradually build in through the weekend resulting in mostly clear skies and warming temperatures. but most likely a cooling trend will take place along with a chance of showers as a low pressure system tracks near or across the region.
205 AM PDT THU MAY 7 2015 A COLD UPPER LEVEL LOW WILL BRING A CHANCE OF SHOWERS AND THUNDERSTORMS TODAY THROUGH FRIDAY AS WELL AS COOL TEMPERATURES.
602 AM EDT THU MAY 7 2015 MID/UPPER RIDGE HOLDS IN PLACE WITH WEAK STEERING FLOW. STAGNANT UPPER LEVEL HIGH PRESSURE CONTINUES. THIS RIDGING WILL BRING A SUBTLE CHANGE TO OUR WEATHER TODAY. WILL KEEP THE LOW LANDS DRY OUTSIDE THE AFOREMENTIONED SLIGHT CHANCE. COMPLEMENTS OF THE SOUTHEAST COAST UPPER LOW DRIFTING NORTH NORTHWEST.
136 AM EDT THU MAY 7 2015 MOSTLY SUNNY AND DRY CONDITIONS UNDER A RIDGE OF HIGH PRESSURE WILL CONTINUE THROUGH THE REST OF THE WEEK WITH TEMPERATURES IN THE 70S AND 80S.
300 AM PDT THU MAY 7 2015 A STORM SYSTEM WILL BRING WINTRY WEATHER TO THE HIGHEST ELEVATIONS OF THE SIERRA THROUGH FRIDAY WITH SHOWERS AND THUNDERSTORMS IN THE LOWER ELEVATIONS.
AND SHORT TERM GUIDANCE SUGGEST LOWS REACHING DOWN INTO THE LOW TO MID 50S ACROSS THE EAST.
504 AM EDT THU MAY 7 2015 A LARGE HIGH PRESSURE SYSTEM WILL BRING RAIN-FREE AND INCREASINGLY WARM WEATHER THROUGH FRIDAY.
AN UPPER LEVEL LOW OVER EASTERN OREGON WILL BE DRIFTING SOUTH TODAY WITH DECREASING CLOUDS AND A DECREASING CHANCE OF SHOWERS. AN UPPER LEVEL RIDGE WILL BE BUILDING IN TONIGHT AND FRIDAY FOR DRY WEATHER WITH WARMER DAYTIME TEMPERATURES.
A cut off low pressure system will continue to slide along the west coast today.
307 AM EDT THU MAY 7 2015 MID/UPPER RIDGE HOLDS IN PLACE WITH WEAK STEERING FLOW. AS WE REMAIN UNDER THE MID AND UPPER LEVEL RIDGE. FLOW AROUND MID LEVEL RIDGE CENTER NR HTS-CRW SHOULD ALLOW THE CONVECTION THIS AFTERNOON AND EVENING IN OUR SOUTHERN COUNTIES TO MOVE WEST.
THERE DOES APPEAR TO BE A NOSE OF THE LOW LEVEL JET AS THE FRONT MOVES IN FROM THE NORTHWEST. UPPER LOW WILL LIFT NORTHEAST TONIGHT. WRAPAROUND PRECIPITATION WILL BE MOVING IN BEHIND THE UPPER LOW WITH THE SEVERE THREAT ENDING EARLY AND LEAVING ONLY AREAS OF LIGHT RAIN WITH A FEW EMBEDDED RUMBLES OF THUNDER.
INCREASINGLY BREEZY CONDITIONS WILL DEVELOP THROUGH THURSDAY AS A STRONG AND COLD LOW PRESSURE SYSTEM BEGINS TO MOVE TOWARD SOUTHERN CALIFORNIA AND SOUTHERN NEVADA. SHOWERS AND THUNDERSTORMS ARE POSSIBLE AREA WIDE FRIDAY AS THE LOW MOVES OVER THE REGION WITH TEMPERATURES WELL BELOW NORMAL.
250 AM PDT THU MAY 7 2015 A DEEP LOW PRESSURE SYSTEM WILL BRING CLOUDY AND COLDER WEATHER THURSDAY AND FRIDAY.
MAINLY OVER THE HIGHER TERRAIN. CURRENT IR SATELLITE IMAGERY SHOWING OVERALL LACK OF CLOUDS AS RIDGING ALOFT IS MAXIMIZING EARLY THIS MORNING. IS GETTING DAMMED UP AGAINST THE HIGHER TERRAIN BY LIGHT SOUTH-SOUTHEASTERLY FLOW. ANOTHER MOSTLY DRY AND SUNNY DAY IS ON TAP AS THE UPPER-LEVEL RIDGE STICKS AROUND. THIS WILL GIVE BIRTH TO DIURNALLY DRIVEN CONVECTIVE SHOWERS/THUNDERSTORMS OVER THE ELEVATED HEATING SURFACES OF THE RIDGES. ANOTHER DRY AND MILD NIGHT IS EXPECTED WITH TEMPERATURES A FEW DEGREES WARMER THAN CURRENT LOW TEMPERATURES. TAX VERY MINIMAL CHANGE TO THE LARGE SCALE PATTERN LOOKS TO BE IN STORE DURING THE SHORT TERM PERIOD OF THE FORECAST AS A SPRAWLING UPPER RIDGE REMAINS IN CONTROL OF THE AREA THROUGH THE PERIOD. WITH THE RIDGE AXIS SLIGHTLY TO THE EAST OF THE AREA.
AREA OF LOW PRESSURE FORECAST TO DEVELOP SOUTH OF THE CAROLINAS DURING THE DAY THURSDAY. GUIDANCE IS INDICATING A SPOKE OF LOW LEVEL MOISTURE MAY WRAP AROUND THE AREA OF LOW PRESSURE AND PUSH SOUTHWARD INTO THE REGION IN THE AFTERNOON.
401 AM EDT THU MAY 7 2015 MOSTLY SUNNY AND DRY CONDITIONS UNDER A RIDGE OF HIGH PRESSURE WILL CONTINUE THROUGH THE REST OF THE WEEK WITH TEMPERATURES IN THE 70S AND 80S.
BEHIND THE UPPER LEVEL LOW THE LATEST 05 UTC RUN OF THE HRRR SHOWS SHOWERS ACROSS CENTRAL NORTH DAKOTA BECOMING SCATTERED BY 16 UTC. MOS GUIDANCE FROM THE GFS IS SHOWING THE LOWER 30S ACROSS THE NORTHWEST WHILE THE NAM GUIDANCE IS SUGGESTING THE UPPER 20S.
326 AM EDT THU MAY 7 2015 HIGH PRESSURE WILL GRADUALLY SLIDE OFFSHORE TODAY.
404 AM EDT THU MAY 7 2015 LOW PRESSURE OFF THE GEORGIA AND SOUTH CAROLINA COAST WILL SLOWLY MOVE NORTH TODAY THEN TO COASTAL SOUTH CAROLINA FRIDAY.
WE EXPECT THE MAIN THREAT TO LAST THROUGH MIDNIGHT AND GOING BY ANY UNFORESEEN CHANGES AMONGST THE HIGH-RESOLUTION MODELS.
301 AM CDT THU MAY 7 2015 SKIES ARE MOSTLY CLEAR ACROSS THE FORECAST AREA EARLY THIS MORNING WITH TEMPERATURES RANGING FROM THE LOWER 50S TO AROUND 70 DEGREES. HIGH PRESSURE CONTINUES TO COVER MUCH OF THE EASTERN U. AND THIS HIGH WILL KEEP THINGS DRY FOR MOST OF THE FORECAST AREA TODAY. TEMPERATURES WILL BE REMAIN ON THE WARM SIDE AGAIN TODAY WITH HIGHS IN THE LOW TO MID 80S. A COLD FRONT WILL BE MOVING INTO THE CENTRAL PLAINS.
THE 00Z UPPER AIR ANALYSIS SHOWED A BROAD UPPER LEVEL TROUGH OVER THE CENTRAL AND WESTERN CONUS. AT THE SAME TIME, A CLOSED UPPER LOW WAS DROPPING SOUTHWARD OUT OF THE PACIFIC NORTHWEST INTO NORTHERN CALIFORNIA.
336 AM CDT THU MAY 7 2015 A COLD FRONTAL BOUNDARY ORIENTED NORTH-SOUTH ACROSS THE NORTHERN AND CENTRAL PLAINS EARLY THIS MORNING WILL APPROACH SLOWLY THROUGH THE DAY WHILE A LARGE SCALE TROUGH OVER THE WESTERN U. AND RIDGE OVER THE EASTERN U.
WE WILL SEE A SLOW WARMING TREND ON FRIDAY AS THE UPPER LOW MOVES AWAY FROM THE AREA AND HEIGHTS RISE.
353 AM EDT THU MAY 7 2015 HIGH PRESSURE WILL MAINTAIN WARM AND MAINLY DRY CONDITIONS TODAY. TEMPS SHOULD BE A FEW DEGREES WARMER TODAY WITH ALL AREAS EXCEEDING 80.
350 AM EDT THU MAY 7 2015 HIGH PRESSURE WILL BUILD OVER THE NORTHERN MID-ATLANTIC TODAY. LOW PRESSURE OFF THE CAROLINA COAST WILL APPROACH THE COASTLINE FRIDAY BEFORE GRADUALLY ERODING THIS WEEKEND.
448 AM CDT THU MAY 7 2015 WEAK TRANSITORY RIDGE AXIS OVER THE MISSISSIPPI VALLEY EXTENDING SOUTHWEST BACK ACROSS THE TEXAS COASTAL PLAIN. FALLING BETWEEN A PACIFIC NORTHWEST UPPER LOW AND A MEANDERING LOW OFF THE CAROLINA COASTS. CAPPING STILL NOTED IN THE 85-7H LEVELS BUT SURFACE LAYER WARMING INTO THE LOWER 80S SHOULD ALLOW PARCELS TO BETTER TAP INTO THE GREATER THAN 2K CAPE THE NWP SOUNDINGS ARE FORECASTING THIS AFTERNOON. THE WEST COAST LARGE BROAD UPPER LOW WILL TRAVEL INTO THE GREAT BASIN TOMORROW AND COMMENCE WHAT IS BECOMING A COMMON THEME OF SPREADING SOUTHWESTERLY FLOW ACROSS EASTERN TEXAS OVER THE WEEKEND.
/ISSUED 312 PM EDT WED MAY 6 2015/ UPPER LEVEL RIDGE WILL CONTINUE TO DOMINATE THE FORECAST AREA IN THE SHORT TERM BUT IT DOES BREAK DOWN WITH APPROACHING TROPICAL SYSTEM. WITH THE LOCATION OF THE RIDGE OVER THE REGION. INSTABILITIES DO INCREASE A BIT THU ACROSS THAT AREA BUT NOTHING MAJOR WITH HIGH PRESSURE KEEP THINGS SUBDUED. BUT ALL ARE POINTING TO SOME DEGREE OF DEEPENING AS THE LOW DRIFTS NORTH ALONG OR JUST OFF THE GA/SC COAST. BOTH THE GFS AND ECMWF ARE DRAGGING A FRONT THROUGH THE STATE WITH WEAKENING UPPER RIDGING.
511 AM CDT Thu May 7 2015 There is an upper trough over the western half of the conus with the CWA under mostly westerly flow aloft. The upper low is centered over California and is expected to move toward the region through the end of the week.
1247 AM CDT THU MAY 7 2015 CURRENT ANALYSIS HAS THE SURFACE STILL AROUND MOBRIDGE. THE COLD FRONT IS NOW EAST OF THE HIGHWAY 83 CORRIDOR AND WILL CONTINUE TO SLOWLY MOVE EAST. SHOWERS CONTINUE TO FILL IN TO THE EAST OF THE INVERTED TROUGH. THERE HAS BEEN SOME RECENT THUNDER ALONG THE INVERTED TROUGH SO CAN NOT RULE OUT THUNDER FOR BISMARCK YET LATE THIS EVENING. A COLD FRONT IS JUST ENTERING FAR NORTHWESTERN NORTH DAKOTA THIS AFTERNOON. WITH DEWPOINTS CLIMBING INTO THE LOW 60S. BEHIND THE DEPARTING COLD FRONT. NORTHERLY WINDS WINDS WILL BRING IN COOLER AIR TO NORTH DAKOTA. OVERNIGHT LOW TEMPERATURES WILL GENERALLY FALL INTO THE THE LOW TO MID 30S. AND THESE CLOUDS MAY PREVENT LOW TEMPERATURES FROM FALLING BELOW FREEZING.
137 AM EDT THU MAY 7 2015 HIGH PRESSURE WILL RETURN FOR THURSDAY AND FRIDAY BRINGING WARM AND DRY WEATHER WITH IT.
412 AM CDT THU MAY 7 2015 VERY WEAK TROUGH AXIS MOVING NORTHWARD VERY SLOWLY OUT OF THE GULF THIS MORNING. THE TROUGH WILL STALL OVER THE TX/LA REGION PROVIDING A SLIGHTLY BETTER FOCUS FOR SH/TS EACH DAY DURING THE HOTTEST HOURS OF THE DAY. MEANING THOSE TEMPS FOR SH/TS TO DEVELOP WILL BE A LITTLE HARDER TO COME BY ESPECIALLY WHERE THE TROUGH IS WEAKEST. TROUGH JUST TO THE WEST OF THE AREA WILL CONTINUE TO MOVE VERY SLOWLY TOWARD THE EAST.
644 AM EDT THU MAY 7 2015 HIGH PRESSURE WILL MAINTAIN WARM AND MAINLY DRY CONDITIONS TODAY. TEMPS SHOULD BE A FEW DEGREES WARMER TODAY WITH ALL AREAS EXCEEDING 80.
ONCE AGAIN THERE WILL BE A CHANCE FOR A COUPLE OF SHOWERS TO FORM IN THE HIGHER TERRAIN AND MAYBE DRIFT TOWARDS THE VALLEY.
147 AM EDT THU MAY 7 2015 MID/UPPER RIDGE HOLDS IN PLACE WITH WEAK STEERING FLOW. AS WE REMAIN UNDER THE MID AND UPPER LEVEL RIDGE. FLOW AROUND MID LEVEL RIDGE CENTER NR HTS-CRW SHOULD ALLOW THE CONVECTION THIS AFTERNOON AND EVENING IN OUR SOUTHERN COUNTIES TO MOVE WEST. UPPER RIDGE HOLDS ACROSS THE REGION THROUGH THE SHORT TERM. WITH WARM AND HUMID AIR IN PLACE AS AREA REMAINS IN THE WARM SECTOR OF A LOW PRESSURE SYSTEM TO THE WEST.
MAINLY OVER THE HIGHER TERRAIN. CURRENT IR SATELLITE IMAGERY SHOWING OVERALL LACK OF CLOUDS AS RIDGING ALOFT IS MAXIMIZING THIS MORNING. ANOTHER MOSTLY DRY AND SUNNY DAY IS ON TAP AS THE UPPER-LEVEL RIDGE STICKS AROUND. THIS WILL FUEL DIURNALLY DRIVEN CONVECTIVE SHOWERS/THUNDERSTORMS OVER THE ELEVATED HEATING SURFACES OF THE RIDGES. ANOTHER DRY AND MILD NIGHT IS EXPECTED WITH TEMPERATURES A FEW DEGREES WARMER THAN CURRENT LOW TEMPERATURES. TAX VERY MINIMAL CHANGE TO THE LARGE SCALE PATTERN LOOKS TO BE IN STORE DURING THE SHORT TERM PERIOD OF THE FORECAST AS A SPRAWLING UPPER RIDGE REMAINS IN CONTROL OF THE AREA THROUGH THE PERIOD. WITH THE RIDGE AXIS SLIGHTLY TO THE EAST OF THE AREA.
347 AM PDT Thu May 7 2015 A low pressure system dropping through northern California will bring scattered showers or thunderstorms to much of Norcal today then to the Sierra through the end of the week.
A BROAD AREA OF LOW PRESSURE EXTENDED FROM THE SOUTHEAST SK/SOUTHWEST MB AREA INTO NORTHWEST KS THIS AFTERNOON. LOW PRESSURE WILL MOVE INTO THE EASTERN DAKOTAS TONIGHT. THEN INTO MINNESOTA ON THURSDAY AND DRAG A COLD FRONT THROUGH THE REGION INTO FRIDAY. THAT PUTS THEM NEAR THE HIGHS FOR THIS TIME OF YEAR. SHOWERS AND STORMS WILL GRADUALLY DIMINISH FROM WEST TO EAST THURSDAY NIGHT AS THE BETTER FORCING AND THE LOW LEVEL JET SHIFT EAST. THERE COULD BE LINGERING LIGHT RAIN SHOWERS OVER THE NORTHLAND FRIDAY MORNING IN THE WAKE OF THE COLD FRONT THAT WILL HAVE PASSED THROUGH THE REGION THURSDAY NIGHT AND EARLY FRIDAY. HIGH PRESSURE IN CANADA WILL BUILD INTO THE REGION.
637 AM EDT THU MAY 7 2015 A LARGE HIGH PRESSURE SYSTEM WILL BRING RAIN-FREE AND INCREASINGLY WARM WEATHER THROUGH FRIDAY.
331 AM EDT THU MAY 7 2015 MID/UPPER RIDGE HOLDS IN PLACE WITH WEAK STEERING FLOW. STAGNANT UPPER LEVEL HIGH PRESSURE CONTINUES. THIS RIDGING WILL BRING A SUBTLE CHANGE TO OUR WEATHER TODAY. WILL KEEP THE LOW LANDS DRY OUTSIDE THE AFOREMENTIONED SLIGHT CHANCE. COMPLEMENTS OF THE SOUTHEAST COAST UPPER LOW DRIFTING NORTH NORTHWEST.
A STORM SYSTEM WILL BRING WINTERY WEATHER TO THE HIGHEST ELEVATIONS OF THE SIERRA TODAY THROUGH FRIDAY WITH SHOWERS AND THUNDERSTORMS IN THE LOWER ELEVATIONS.
UPPER RIDGING WILL KEEP DRY WEATHER AND WARM TEMPERATURES ACROSS CENTRAL INDIANA THROUGH THURSDAY NIGHT. HIGH PRESSURE WILL MOVE OFF TO THE EAST ON THURSDAY AND BY FRIDAY THUNDERSTORM CHANCES WILL ARRIVE.
149 AM EDT THU MAY 7 2015 LOW PRESSURE OFF THE GEORGIA COAST WILL SLOWLY MOVE NORTH TODAY THEN TO COASTAL SOUTH CAROLINA FRIDAY.
122 AM EDT THU MAY 7 2015 A DIFFUSE NEARLY STATIONARY FRONT ACROSS NORTH CENTRAL OHIO WILL DRIFT NORTH OVERNIGHT AND DISSIPATE AS WEAK HIGH PRESSURE BUILDS OVER THE MID ATLANTIC STATES. THE WEAK HIGH PRESSURE WILL REMAIN NEARLY STATIONARY INTO FRIDAY. INITIALLY INTO FRIDAY WITH A RIDGE BUILDING ALOFT OVER THE REGION THE CHANCE FOR SHOWERS IS RATHER LOW WITH STABLE CONDITIONS EXPECTED ESPECIALLY ALONG NORTH OF ANY WEAK AFTERNOON LAKE BREEZE.