Aikyam-Lab/Synoptic-Bench huggingface dataset:
CENTRAL PLAINS CYCLONE CENTERED AT THE SURFACE OVER SOUTHEASTERN NEBRASKA WITH FRONTAL BOUNDARY DARAPED DOWN INTO EASTERN OKLAHOMA. BACK EDGE OF CONVECTION IN THE FORM OF SHOWERS SHOULD BE OFF THE PLATEAU BY 12Z THURSDAY FOLLOWED BY COOLER TEMPS WITH HIGHS ON THURSDAY IN THE LOW TO MIDDLE 60S.
346 PM EST WED NOV 11 2015 HIGH PRESSURE WILL REMAIN OVER THE STATE TONIGHT INTO THURSDAY MORNING.
UPPER LOW LOCATED ALONG IA/NE BORDER. REINFORCING COLD FRONT ARRIVES IN NORTHWEST SOUTH DAKOTA LATE TONIGHT.
1216 PM EST WED NOV 11 2015 HIGH PRESSURE WILL DRY THE AREA OUT TODAY.
EXPECT A RETURN TO DRY AND MILDER CONDITIONS IN THE WAKE OF THE RECENT TROUGH PASSAGE.
AS THE STORM SYSTEM AND COLD FRONT MOVE THROUGH THE REGION. THEN A COOLER TEMPERATURE FORECAST INTINIALLY. ASSOCIATED WITH LOW PRESSURE TROUGH. WHICH IS WELL AHEAD OF THE COLD FRONT IN CENTRAL KS. STILL EXPECT THE SURFACE SYSTEM TO LIFT NE AND GRADUALLY MOVE THE WARM FRONT AND LOW PRESSURE TROUGH THROUGH THE STATE. THEN THE COLD FRONT MORE INTO THE EVENING PERIOD.
WINDS WILL TURN FURTHER NORTH AND THEN NORTHEAST DURING THE EVENING BEHIND A MORE PRONOUNCED FRONTAL WIND SHIFT AS YET COOLER AIR SPRAWLS SOUTHWARD FROM THE CENTRAL PLAINS.
WARM FRONT WITH LIGHT PCPN PASSED THROUGH IDAHO THIS MORNING LEAVING BEHIND MOSTLY CLOUDY BUT MILD WX IN ERN OREGON AND WRN IDAHO THIS AFTERNOON. COLD FRONT IN THE PACIFIC EXTENDING FROM VANCOUVER ISLAND THROUGH 40/130 WILL COME THROUGH ERN OREGON WEDNESDAY MORNING AND WRN IDAHO LATE WED MORNING THROUGH AFTERNOON.
A WEAK COLD FRONT IS PROGGED TO PUSH INTO NORTH TEXAS AND PROVIDE REINFORCEMENT OF THE DRY AIR ALOFT AND A WIND SHIFT. A COLD FRONT WILL MOVE SOUTHEASTWARD ACROSS THE CENTRAL PLAINS AND INTO THE SOUTHERN PLAINS TODAY. THE WEAK COLD FRONT WILL MOVE INTO THE NORTHWESTERLY PART OF THE FORECAST AREA BEFORE SUNSET TODAY AND BECOME MORE DIFFUSE AS IT MOVES INTO THE SOUTHEASTERN ZONES OVERNIGHT TONIGHT.
41 LATEST SURFACE ANALYSIS SHOWS WEAK HIGH PRESSURE CENTERED OVER AL AND WEST TN AND DRIFTING EAST. A LIGHT SOUTHERLY WIND AND MOSTLY CLEAR SKIES WILL ALLOW HIGHS TO CLIMB INTO THE LOWER TO MID 60S TODAY.
1241 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL BRING LIGHT WINDS AND SEASONABLE TEMPERATURES TO THE NORTH COUNTRY TODAY.
121 PM EST TUE DEC 8 2015 HIGH PRESSURE RETURNS LATER TODAY THROUGH WEDNESDAY.
244 PM EST TUE DEC 8 2015 HIGH PRESSURE BUILDS INTO THE AREA TONIGHT AND CROSSES THE AREA WEDNESDAY.
TEMPERATURES TO CLIMB INTO THE UPPER 60S TO LOWER 70S TODAY AHEAD OF A WEAK FRONTAL BOUNDARY AND UPPER-LEVEL TROUGH THAT WILL MOVE ACROSS THE REGION ON WEDNESDAY.
BUT THERE IS A RELATIVE BREAK IN THE ACTION EARLY THIS AFTERNOON AS AN UPPER LEVEL RIDGE BREAKS TO THE EAST OF THE AREA. A SHORT WAVE EJECTED BY THE UPSTREAM UPPER TROUGH WILL MOVE ONSHORE THIS EVENING. WINDS WILL DIMINISH WEDNESDAY AFTERNOON AS A SHORT WAVE RIDGE MOVES THROUGH.
TYPICALLY COOLER LOCATIONS ACROSS THE NORTH ARE IN THE LOW 30S. EXPECT TEMPERATURES TO BE SIMILAR OR A COUPLE DEGREES WARMER THAN YESTERDAY.
TEMPERATURES ONCE AGAIN HAVE REACHED THE MID 50S TO LOWER 60S AT MID AFTERNOON WITH LIGHT WINDS AS HIGH PRESSURE CONTINUES. LOWS TONIGHT SLIGHTLY WARMER WITH LIGHT SOUTHWEST WINDS OVER THE HIGHER ELEVATIONS WEST AND NORTH. LOWS STILL AROUND FREEZING THOUGH IN THE MORE SHELTERED VALLEYS. AS HIGH PRESSURE REMAINS THE DOMINANT WEATHER FEATURE ACROSS THE REGION THROUGH AT LEAST THE EARLY PART OF THE WEEKEND.
Leeside troughing quickly reorganizes on Wednesday, under W/NW flow aloft.
Cloud cover may increase a bit more tonight as the trough passes through the area, especially over central Missouri. Wednesday is shaping up to be very similar to today, with highs in the low to mid 60s under generally sunny skies.
With no real push of any cold air or surge of warmer air, temperatures look to be fairly steady and vary generally from the upper 50s to the middle 60s for highs and mid 30s to lower 40s for lows.
THE LOW CLOUDS EXITED PORTIONS OF THIS AFTERNOON. TEMPERATURES (AIR AND ROAD) SHOULD JUST BE A FEW DEGREES ABOVE FREEZING CLOUDS WILL BE ON THE DECREASE.
101 PM EST TUE DEC 8 2015 HIGH PRESSURE OVER THE APPALACHIANS WILL MOVE TO THE MID-ATLANTIC COAST TONIGHT.
VISIBILITIES TO 1/4 MILE OR LESS ARE BECOMING INCREASINGLY COMMON WITH EXPANSIVE FOG OR FREEZING FOG AREA WIDE. WILL UPGRADE FROM SPS AND ISSUE FOG ADVISORY AND HIT UPON EMBEDDED AREAS OF FREEZING FOG CREATING SLICK ROADWAY CONDITIONS AT TIMES. A TROF PASSAGE LATER TONIGHT-WEDNESDAY COULD MEAN SOME LIGHT SHOWERS OR SPRINKLES.
SEVERAL AREAS OF LOW PRESSURE WILL MOVE ACROSS THE GREAT LAKES DURING THE NEXT FEW DAYS PROVIDING LOW CHANCES OF LIGHT RAIN.
ANOTHER BEAUTIFUL DAY HAS UNFOLDED ACROSS THE ARKLAMISS AS WEAK HIGH PRESSURE REMAINS SPRAWLED ACROSS THE REGION. AN UPPER LEVEL TROUGH WILL SWING NORTH OF THE REGION LATE TONIGHT AND EARLY TOMORROW MORNING. TEMPERATURES THROUGH THE WEEK WILL PROGRESSIVELY GET WARMER AS HEIGHTS WILL RISE AND MOISTURE WILL CONTINUE TO RETURN. IN SOME LOCATIONS WE MAY START TO FLIRT WITH RECORD HIGHS AS RIDGING BUILDS OVER THE ARKLAMISS.
THIS IN COMBINATION WITH A WEAK COLD FRONT MOVING THROUGH NRN NEB WOULD PRODUCE DEEPER VERTICAL MIXING AND HIGHS IN THE LOWER 60S. THIS SOLID DOWNSLOPE FORMS AHEAD OF THE COLD FRONT WHICH WOULD ALSO AID IN MIXING. WINDS LET UP SUGGESTING COOLER LOWS IN THE UPPER 20S TO LOWER 30S. COOLER TEMPERATURES AND A CHANCE FOR RAIN OR SNOW ARRIVES IN TIME FOR THE WEEKEND AS AN UPPER LEVEL LOW DIGS INTO THE FOUR CORNERS REGION. LATEST GFS GUIDANCE HAS SOME OF THE AREA TOPPING OFF IN THE LOW 70S. PACIFIC COLD FRONT TRACKS MOVES INTO NEBRASKA WEDNESDAY NIGHT. SO TEMPERATURES WILL STRUGGLE TO FALL OFF AND MAY STAY ABOVE FREEZING THROUGH THE NIGHT. COOLER TEMPERATURES.
359 PM CST TUE DEC 8 2015 SFC ANALYSIS THIS AFTERNOON HAS A BROAD AREA OF LOW PRESSURE IN THE PLAINS SO SOUTHERLY WINDS HAVE INCREASED ACROSS THE AREA.
1255 PM EST TUE DEC 8 2015 DEEPENING LOW PRESSURE PASSES WELL TO THE SOUTH AND EAST TODAY. HIGH PRESSURE BUILDS TONIGHT AND WEDNESDAY. HIGH PRESSURE REMAINS OVER THE REGION THROUGH THE WEEKEND WITH A COUPLE OF WARM FRONTS MOVING THROUGH. DRY CONDITION FOR THE REST OF THE DAY AS LOW PRESSURE PULLS AWAY FROM THE AREA. AN UPPER TROUGH MOVES ACROSS THE AREA THIS MORNING. AS THE HIGHER LEVEL CLOUDS DEPART. TEMPS WILL BE COOLER TODAY AS CANADIAN AIR SETTLES IN. RIDGE BUILDS TONIGHT AS THE TROUGH DEPARTS. RIDGE AXIS MOVES EAST WEDNESDAY AHEAD OF NEXT QUICK MOVING TROUGH. FREEZING FOG.
341 PM EST TUE DEC 8 2015 HIGH PRESSURE OVER THE CAROLINAS TONIGHT WILL MOVE EAST WEDNESDAY.
340 PM EST TUE DEC 8 2015 HIGH PRESSURE WAS MOVING OFF THE MIDDLE ATLANTIC COAST LATE THIS AFTERNOON. THIS WILL ALLOW AN UPPER LEVEL TROUGH TO MOVE ACROSS THE REGION ON WEDNESDAY. A STRONG UPPER LEVEL RIDGE WILL BUILD OVERHEAD TO END THE WEEK. SOUTHERLY WINDS AROUND 10 MPH ALONG WITH A MOSTLY CLOUDY TO CLOUDY SKY WILL PRODUCE A WARMER NIGHT THAN THE LAST FEW. A TROUGH OF LOW PRESSURE WILL MOVE ACROSS THE REGION ON WEDNESDAY WITH A CLOUDY DAY EXPECTED.
Surface reflection is a fairly weak trof that I hesitate to call a front, and doesn't really have time to tap into much Gulf moisture as it moves through.
313 PM CST TUE DEC 8 2015 QUIET AND WARM DAY ACROSS THE MID STATE TODAY AHEAD OF THE APPROACHING TROUGH CURRENTLY OVER THE GREAT PLAINS.
354 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL MOVE SLOWLY EAST OFF THE EAST COAST DURING THE NEXT COUPLE OF DAYS. A WEAK LOW PRESSURE SYSTEM WILL BRING SCATTERED SHOWERS WEDNESDAY NIGHT.
WEAK HIGH PRESSURE WILL SHIFT OFFSHORE LATE TONIGHT.
305 PM EST TUE DEC 8 2015 HIGH PRESSURE OVER THE AREA WILL SHIFT SOUTHEAST TO CAPE HATTERAS THROUGH THIS EVENING. AN UPPER LEVEL TROUGH WILL MOVE EAST THROUGH THE AREA WEDNESDAY NIGHT. HIGH PRESSURE BUILDS SOUTH OF THE AREA FOR THE WEEKEND RESULTING IN WELL ABOVE NORMAL TEMPERATURES.
848 AM PST TUE DEC 8 2015 HIGH PRESSURE WILL PEAK OVER THE REGION TODAY.
1045 AM MST TUE DEC 8 2015 A PERIOD OF WINDY CONDITIONS IS EXPECTED THIS MORNING TO EARLY AFTERNOON BEHIND A TROUGH AXIS.
ANOTHER REASON TO WATCH TO SEE IF THE LOW LEVEL FLOW KEEPS UP ITS FOG PREVENTION MIXING.
301 PM CST TUE DEC 8 2015 ISSUED AT 300 PM CST TUE DEC 8 2015 AT H5 CLOSED LOW OFF NORTHEAST CONUS WITH UPPER TROUGH THROUGH THE MISSOURI RIVER VALLEY AND RIDGING OVER THE WEST. UPPER LOW MOVING OUT OF THE GULF OF ALASKA WITH PRECIPITATION STREAMING INTO THE PACIFIC NORTHWEST. MODELS IN FAIR AGREEMENT WITH RIDGE TO THE WEST AND TROUGH TO THE EAST. WITH THE HIGHS TODAY HAVE BUMPED UP FORECAST TO NEAR RECORD HIGHS FOR WEDNESDAY.
The 00z NAM and GFS have the axis of this trough crossing southwest and central Kansas through the midday hours today. A weak cold front associated with the upper wave will push through western Kansas this morning. The airmass behind this front is not significantly cooler. Low temperatures are expected to bottom out around or a few degrees above freezing.
However, once we lose the lower clouds, some mid and high level cloud cover will increase ahead of the next weather system pushing across the Rockies early this morning.
BEFORE HIGH PRESSURE BUILDS IN AND BRINGS DRIER CONDITIONS FOR THE REMAINDER OF THE WEEK.
RIDGE LEVEL WINDS WILL BE PRETTY BRISK OVER THE NORTH WHICH COULD RESULT IN PERIODS OF REDUCED VISIBILITY OVER RABBIT EARS AND VAIL PASSES. A TIGHTENING PRESSURE GRADIENT ALOFT WILL CAUSE RIDGE LEVEL WINDS TO INCREASE ACROSS THE NORTHERN MOUNTAINS DURING THE AFTERNOON. THIS HAS BEEN THE CASE OVER THE PAST SEVERAL DAYS AND WILL NEED TO UNDERCUT MOS GUIDANCE FOR THE LOWER VALLEYS.
346 PM EST TUE DEC 8 2015 HIGH PRESSURE WAS MOVING OFF THE MIDDLE ATLANTIC COAST LATE THIS AFTERNOON. THIS WILL ALLOW AN UPPER LEVEL TROUGH TO MOVE ACROSS THE REGION ON WEDNESDAY. A STRONG UPPER LEVEL RIDGE WILL BUILD OVERHEAD TO END THE WEEK. SOUTHERLY WINDS AROUND 10 MPH ALONG WITH A MOSTLY CLOUDY TO CLOUDY SKY WILL PRODUCE A WARMER NIGHT THAN THE LAST FEW. A TROUGH OF LOW PRESSURE WILL MOVE ACROSS THE REGION ON WEDNESDAY WITH A CLOUDY DAY EXPECTED.
1145 AM EST TUE DEC 8 2015 HIGH PRESSURE WILL BRING LIGHT WINDS AND SEASONABLE TEMPERATURES TO THE NORTH COUNTRY TODAY.
316 PM CST TUE DEC 8 2015 This afternoon, a mid level trough axis was steadily making its way east across the forecast area. With dry low level conditions in place today, the main feature with this passing trough is the associated mid-level clouds and shifting surface winds. Winds behind the progressing trough shift from the west-northwest and become light and variable overnight. Another dry day is in store for tomorrow with warmer than average temperatures. With only scattered high clouds forecast, southwest winds will help to bump temperatures into the low to mid-60s.
MID TO UPPER LEVEL DIFFLUENCE ALONG WITH MID LEVEL VORTICITY ALONG THE COLD FRONT ALLOWED FOR A HIGH BROKEN CLOUD DECK WHICH PREVENTED MUCH SURFACE HEATING. FORECASTED TEMPS IS SOMEWHAT OF A SPLIT OF MOS SOLUTIONS WITH A BIT OF A LEAN TO THE COOLER SIDE. WINDS WILL PICK TOMORROW AFTERNOON AND TURN TO THE SOUTHWEST AS A LEE TROF APPROACHES THE REGION. THIS SHOULD HELP TO WARM TEMPS UP TO THE LOW 70S. AN UPPER LEVEL TROUGH WILL BEGIN TO DIG OUT OF THE WESTERN CONUS LATE THIS WEEK.
BUT THERE IS A RELATIVE BREAK IN THE ACTION THIS MORNING AS AN UPPER LEVEL RIDGE BREAKS TO THE EAST OF THE AREA. A SHORT WAVE EJECTED BY THE UPSTREAM UPPER TROUGH WILL MOVE ONSHORE THIS EVENING. WINDS WILL DIMINISH WEDNESDAY AFTERNOON AS A SHORT WAVE RIDGE MOVES THROUGH.
338 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL REMAIN OVER THE AREA TONIGHT THROUGH WEDNESDAY. THE HIGH WILL MOVE EAST WEDNESDAY NIGHT AS A WEAK TROUGH OF LOW PRESSURE APPROACHES FRO THE WEEST.
TEMPERATURES HAD REACHED THE LOWER TO MIDDLE 40S ACROSS MOST OF THE REGION. AS THE HIGH RESOLUTION MODELS INDICATE GOOD BANDING OF PRECIPITATION LIFTING INTO THE SOUTHEAST 1/3 OF THE CWA. THINK THE HIGHEST QPF AMOUNTS WILL BE IN NW WI. AND POSSIBLY A BIT OF FREEZING RAIN LATE. DESPITE HIGH PRESSURE BUILDING IN BEHIND THIS SYSTEM. BUT AS SURFACE TEMPS DROP TO NEAR FREEZING FOR A FEW HOURS. WE MAY SEE SOME OCCASIONAL FREEZING RAIN THAT MAY LEAD TO SOME LIGHT ICE ACCUMULATIONS MAINLY NORTH OF HIGHWAY 2 IN MINNESOTA.
LOWS TONIGHT WILL BE MOSTLY IN THE LOW TO MID 50S AND TOMORROW NIGHT ONLY DROPPING INTO THE MID TO UPPER 50S.
303 PM CST TUE DEC 8 2015 SKIES REMAIN MOSTLY SUNNY ACROSS MUCH OF THE FORECAST AREA THIS AFTERNOON WITH TEMPERATURES RANGING FROM THE LOWER 60S TO LOWER 70S. THIS TROUGH WILL MOVE INTO ARKANSAS TONIGHT. MOISTURE IS INCREASING AHEAD OF THE TROUGH BUT IT APPEARS THAT THERE WILL NOT BE ENOUGH TO PRODUCE ANY RAIN TONIGHT. AS THE TROUGH MOVES INTO WEST TENNESSEE AND NORTH MISSISSIPPI WEDNESDAY MORNING. TEMPERATURES WILL REMAIN ABOVE NORMAL WITH HIGHS IN THE LOW TO MID 60S. HIGH PRESSURE WILL BUILD OVER THE SOUTHEAST U.
1258 PM PST TUE DEC 8 2015 HIGH PRESSURE WILL PEAK OVER THE REGION THIS EVENING. THEN WEAKEN AS A LOW PRESSURE TROUGH APPROACHES FROM THE NORTH. BUT COOLER ALONG THE COAST.
THIS MORNING HAD A COOLER START WITH LOWS IN THE LOW/MID 30S WITH CLEAR SKIES AND HIGH PRESSURE STATIONED OVER THE REGION. THE HIGH PRESSURE WILL PUSH EAST TODAY PROVIDING SOUTHERLY FLOW INTO REGION. AS TEMPS ARE RUNNING SEVERAL DEGREES COOLER. THERE IS ALSO A CHANCE THAT THE LOW CLOUDS MAY BE SUB-VFR LEVELS.
BUT RETURN FLOW IS EXPECTED TO INCREASE AHEAD OF A WEAK UPPER LEVEL TROUGH BRINGING AN INCREASE IN LOW STRATUS AFTER 06Z WITH CIGS LIKELY DIPPING BELOW 1000 FT IN THE 09-15Z TIME FRAME. TEMPERATURES WILL BE A LITTLE WARMER TODAY. OVERNIGHT LOWS WILL BE WARMER TONIGHT RANGING FROM AROUND 40 IN THE EAST TO 50 IN THE WEST. A SHORT WAVE AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE AREA ON WEDNESDAY. THE FRONT WILL KEEP TEMPERATURES A LITTLE COOLER IN THE NORTH WITH HIGHS TOPPING OUT IN THE MID 60S IN THE NORTH TO MID 70S IN THE SOUTH.
ALL OF THE MODELS ARE INDICATING SOME WEAK ISENTROPIC LIFT TONIGHT INTO WEDNESDAY AHEAD OF THE TROUGH AXIS SO THE GENERAL IDEA OF INCREASING CLOUDS AND A FEW SHOWERS DOES NOT SEEM OUT OF THE QUESTION.
A SURFACE COLD FRONT IS ACCOMPANYING THE UPPER LEVEL FEATURE AND EXTENDED ALONG A LINE FROM OKLAHOMA CITY TO WICHITA FALLS TO MIDLAND AT 3 PM. BEFORE RETURNING TO THE SOUTH WEDNESDAY AFTERNOON AS THE RIDGE SLIDES OFF TO OUR EAST.
OVERNIGHT TEMPS SHOULD BE A LITTLE WARMER THAN YESTERDAY AS HIGH CLOUDS WILL CONTINUE TO DROP DOWN FROM THE NW MODERATING OVERNIGHT LOWS. THEREFORE WE CAN EXPECT A MORE ZONAL FLOW WITH A THINNING OF THE HIGH LEVEL CLOUD DECK THROUGH THE DAY.
336 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL MOVE SLOWLY EAST OFF THE EAST COAST DURING THE NEXT COUPLE OF DAYS. A WEAK LOW PRESSURE SYSTEM WILL BRING SCATTERED SHOWERS WEDNESDAY NIGHT.
A BRIEF PERIOD OF CLEAR SKIES HAS ALLOWED FOR SOME PATCHY GROUND FOG AS THE TEMPERATURES COOL OFF INTO THE LOWER TO MID 30S. MOISTURE IS NOT DEEP ENOUGH FOR THE UPCOMING LOW PRESSURE TONIGHT FOR ME TO WARRANT HIGHER THAN SLIGHT CHANCE POPS.
/ISSUED 220 AM CST TUE DEC 8 2015/ WX MAP SHOWS 1022MB HIGH PRESSURE RIDGE AXIS OVER SE TX/LA/MS THIS MORNING. AS THE HIGH MOVES EAST BY THIS EVENING. HIGHS WED SHOULD REACH THE LOWER/MID 70S. COURSE OF LEAST REGRET THIS FAR OUT IS TO CONTINUE WITH SUPERBLEND WITH THE HIGHEST POPS LATE SAT/EARLY SUN (~50-60%).
The low and mid levels of the atmosphere are very dry however. thus other than the high clouds and a wind shift later.
139 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL REMAIN OVER THE AREA TODAY THROUGH WEDNESDAY.
A NORTHWESTERLY FLOW ALOFT WILL ALLOW FOR AN UPPER TROUGH TO MOVE ACROSS THE PANHANDLES TODAY. BROKEN TO OVERCAST HIGH LEVEL CLOUDS WILL BECOME SCATTERED BY 18Z TO 22Z TODAY ONCE THE UPPER TROUGH MOVES EAST OF THE AREA. FOLLOWED BY A RETURN OF COOLER WEATHER AND PRECIP CHANCES FOR THE WEEKEND.
318 PM CST TUE DEC 8 2015 A WEAK COOL FRONT ASSOCIATED WITH AN AREA OF LOW PRESSURE SITUATED OVER SOUTHERN ONTARIO WILL MOVE THROUGH THE STATE THIS EVENING.
A FLAT RIDGE IS NOTED OVER THE PAC NW/NRN ROCKIES REGION. GUSTY NW WINDS CONTINUE THIS AFTN WITH SFC TROF OVER THE FAR ERN DAKOTAS. THIS WILL LIKELY BE THE WARMEST DAY OF THE WEEK WITH THERMAL RIDGE PASSING OVERHEAD. A STRONG/FAST MOVING UPPER LOW WILL RACE EWD FROM THE NRN ROCKIES ALONG THE CNDN BORDER WITH STRONG W/NW WINDS DEVELOPING ACRS THE NRN HALF OF OUR CWFA. THERE COULD BE SOME -SHRA AS WELL WED NIGHT AS THE LOW PASSES TO OUR NORTH.
328 PM CST TUE DEC 8 2015 SKIES WILL REMAIN CLEAR OVERNIGHT WITH LIGHT SOUTHERLY FLOW DEVELOPING AHEAD A SHORT WAVE TROF. A SHORT WAVE TROF WILL PASS TO THE NORTH OF ALABAMA ON WEDNESDAY. AND NAM/GFS FORECAST SOUNDINGS INDICATE AN ABUNDANCE OF CLOUDS DEVELOPING WEST OF I-65 DURING THE DAY ON WEDNESDAY AS A WEAK LOW LEVEL TROF MOVES INTO THE AREA. THE BUT THE LOW LEVEL TROF WILL DISSIPATE AND LEAVE MOISTURE IN THE AREA.
1017 AM PST TUE DEC 8 2015 Despite a weak ridge over northern California clouds and mountain showers will continue to stream through northern California today.
WITH SKY COVER ALSO DIMINISHING AS A HIGH PRESSURE RIDGE TRACKS ACROSS THE PLAINS OVERNIGHT.
217 PM CST TUE DEC 8 2015 LITTLE CHANGE TO THE SPIRIT OF THE GOING FORECAST WITH TEMPERATURES TO REMAIN MUCH ABOVE SEASONAL CLIMO WITH A MEAN DOWNSLOPE COMPONENT OFF THE HIGH PLAINS CONTINUING THE NEXT FEW DAYS.
401 PM EST TUE DEC 8 2015 CLOUDS WILL INCREASE TONIGHT AND A FEW SHOWERS ARE EXPECTED ON WEDNESDAY AS A WEAK COLD FRONT MOVES THROUGH FROM THE WEST.
and low pressure along the lee-side of the Rockies, resulting in light southerly winds. Model soundings show dry conditions in the low-levels with this passing trough, however expect an increase in the mid-level cloud cover through the day. It is worth noting that some short-range models are a few degrees cooler with highs today due to the cloud cover, so temperature trends will need to be monitored closely today. Expect the southerly winds to shift to the west-northwest behind the exiting trough.
UPPER TROUGH OVER THE CENTRAL STATES WILL MOVE EAST THROUGH THE OHIO VALLEY AND INTO THE SOUTHERN APPALACHIANS THROUGH WEDNESDAY NIGHT. A COUPLE OF DEGREES COOLER IN A FEW PLACES OVERNIGHT AND A LITTLE WARMER SOME AREAS TOMORROW AS SOUTHERLY FLOW INCREASES.
INDUCING AN INVERTED TROUGH ACROSS FL STRAITS/SOUTH FL THAT WILL EXTEND NORTHEAST. CLOSER/JUST EAST OF THE WEAK TROUGH AXIS AND WHERE GREATER LOW LEVEL MOISTURE/ELEVATED LOW LEVEL ONSHORE FLOW WILL EXIST. MOS GUIDANCE SEEMS A LITTLE ON THE HIGH END WITH POPS SO LEANED CONSERVATIVE ON RAIN CHANCES FOR TOMORROW.
154 PM MST TUE DEC 8 2015 A PERIOD OF WINDY CONDITIONS IS EXPECTED THIS MORNING TO EARLY AFTERNOON BEHIND A TROUGH AXIS.
Temps are not expected to be significantly different behind the weak boundary and will actually be warmer tomorrow due to more abundant sunshine.
310 PM CST TUE DEC 8 2015 A surface pressure trough axis currently moving into western Iowa will continue a rapid eastward progression tonight. shifting to westerly and decreasing overnight after the trough axis passes. especially east of I-55 where lows should be in the low to mid 40s. To the west a reasonable amount of cooling is possible by early morning as skies clear behind the trough.
246 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL MOVE EAST OFFSHORE TONIGHT.
1158 AM EST TUE DEC 8 2015 HIGH PRESSURE WILL PREVAIL THIS AFTERNOON INTO THE WEEKEND.
WITH RIDGE BUILDING ACROSS THE PACIFIC NORTHWEST. TROF OF LOW PRESSURE IS CURRENTLY LOCATED ACROSS THE DAKOTAS. WITH HIGH PRESSURE OVER THE ROCKIES AND GREAT BASIN. IN BETWEEN THE SURFACE TROF TO THE EAST. AND HIGH PRESSURE TO THE WEST. UPPER LEVEL RIDGE WILL CROSS THE NORTHERN PLAINS ON WEDNESDAY.
FOR TONIGHT WITH A WEAK ONSHORE FLOW DEVELOPING LATE TODAY CONTINUING THROUGH TONIGHT BELIEVE WE WILL SEE BETTER COVERAGE OF FOG OVERNIGHT AND EARLY WED MORNING WITH THE BEST CHANCE FOR FOG OCCURRING OVER THE LOWER HALF OF THE FORECAST AREA SHORTLY BEFORE AND AFTER SUNRISE. AS FOR TEMPS WILL CONTINUE WITH THE LATEST TREND FROM THE PREVIOUS SHIFT LEANING TOWARDS OR SLIGHTLY ABOVE THE WARMER MAV GUIDANCE FOR WED AFTERNOON. HIGHS ON WED WILL BE IN THE LOWER 70S FOR MOST OR ALL AREAS. FOR TONIGHT WITH MOSTLY CLEAR SKIES EXPECTED WILL LEAN TOWARDS THE COOLER GUIDANCE RESULTING IN LOW TEMPS MOSTLY IN THE LOWER 40S FOR MOST INLAND AREAS WITH A FEW AREAS TO THE EAST NORTHEAST FALLING TO THE UPPER 30S.
/issued 422 AM CST TUE DEC 8 2015/ (Today and tonight) A strong upper-level cyclone over the Gulf of Alaska will continue to move east today, with strong westerlies along its southern flank, extending south and east from the Pacific Northwest across the Central Rockies. Temperatures are forecast to fall into the mid 30s to lower 40s by sunrise Wednesday, although some low- lying areas and river valleys may briefly hit the freezing (melting) mark.
Raw and blended guidance has been running a few degrees warm over the last few nights, so have favored the cooler statistical guidance for overnight low temperatures. Expect temperatures to generally fall into the lower to mid 40s by morning, with a few upper 30s possible in normally colder locations.
VFR conditions and light west winds will continue the next 24 hours, except perhaps a weak northeast wind shift at MAF/HOB behind a cold front near 00z.
BROAD HIGH PRESSURE WILL REMAIN OVER THE AREA TODAY AND WEDNESDAY AS A MID LEVEL TROUGH PASSES HARMLESSLY TO THE NORTH OVER EAST TEXAS TODAY. PUSHING INTO THE LOWER 80S.
1047 AM MST TUE DEC 8 2015 18Z TAF CYCLE IN THE WAKE OF AN UPPER LEVEL TROUGH NOW EXITING EAST OF THE AREA.
07Z SURFACE ANALYSIS SHOWS HIGH PRESSURE HAS SHIFTED EAST INTO THE OHIO VALLEY AS LOW PRESSURE DEVELOPS ALONG THE LEE OF THE ROCKIES. SATELLITE WATER VAPOR IMAGERY SHOWS A WELL DEFINED SHORT WAVE TROUGH MOVING THROUGH WY AND HEADING TOWARD NEB/KS.
1248 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS ACROSS THE REGION TODAY AND TONIGHT. DRY CONDITIONS WILL BE PRESENT TODAY WITH HIGH PRESSURE IN EFFECT.
LATEST SURFACE ANALYSIS INDICATES THAT THE FRONTAL TROUGH OVER THE STRAITS HAS INCHED TOWARD THE NORTH AND WEST WITHIN THE LAST FEW HOURS. THE FRONTAL TROUGH SHOULD BE SHIFTING NORTHEASTWARD.
242 PM CST TUE DEC 8 2015 WINDS INCREASED FROM THE SOUTH TODAY AS HIGH PRESSURE BEGIN TO SHIFT FURTHER TO THE EAST. WITH SOME LOW CLOUDINESS TRANSPORTED INTO MAINLY LA PORTIONS OF THE AREA IN THIS LOW LVL FLOW. SOME OF THIS SHALLOW COOLER AIR WILL FILTER IN FROM THIS FRONT. JUST ENOUGH TO HUG THE SFC WEDNESDAY NIGHT WARMER AIR ABOVE THE SFC.
LOW LEVEL TROUGH WILL DEVELOP OFFSHORE THE FL E COAST. WITH LOW LEVEL TROUGH OFFSHORE OF FL SHARPENING. TEMP FCST A BIT UNCERTAIN BUT FAVORED A BLEND WITH MAX TEMPS IN THE LOWER 70S.
925 AM MST TUE DEC 8 2015 STRONG NORTHWEST FLOW BEHIND A TROUGH MOVING OFF TO THE EAST WILL CONTINUE TO PRODUCE WINDY CONDITIONS THROUGH TODAY. WE HAD A LITTLE POP OF AMPLIFIED WAVE RIGHT BEHIND THE TROUGH AXIS EARLY THIS MORNING. THE WARMING ALOFT TODAY MAY HELP KEEP A WEAK STABLE LAYER AND A SMALLER WAVE OVER THE HIGHER TERRAIN. THERE WILL BE FEWER CLOUDS TODAY IN THE SUBSIDENCE BEHIND THE TROUGH.
348 PM EST TUE DEC 8 2015 HIGH PRESSURE WILL PREVAIL TONIGHT INTO THE WEEKEND.
WARM FRONT WITH LIGHT PCPN PASSED THROUGH IDAHO THIS MORNING LEAVING BEHIND MOSTLY CLOUDY BUT MILD WX IN ERN OREGON AND WRN IDAHO THIS AFTERNOON. COLD FRONT IN THE PACIFIC EXTENDING FROM VANCOUVER ISLAND THROUGH 40/140 WILL COME THROUGH ERN OREGON WEDNESDAY MORNING AND WRN IDAHO LATE WED MORNING THROUGH AFTERNOON.
LARGE SCALE TROUGHING WILL PROGRESS FROM THE MISSISSIPPI VALLEY THIS EVENING INTO THE EASTERN GREAT LAKES. AN ACCOMPANYING COLD FRONT WILL SWEEP EASTWARD THROUGH THE PERIOD. WEAK LOW PRESSURE ALONG THE SFC BAROCLINIC ZONE WILL LIFT NORTHEAST INTO NORTHERN WISCONSIN. SFC COLD FRONT PASSES THROUGH WEDNESDAY MORNING WITH ANY SHOWERS OR SPRINKLES DEPARTING THE EAST DURING THE MORNING. TRANSIENT RIDGING THEN TAKES HOLD BY AFTERNOON WITH SLOW CLEARING.
Temperatures will be a bit tricky tonight, as current surface observations show dewpoints plummeting to near 20 degrees behind the trough. However, satellite imagery shows a large area of cirrus clouds moving across West Central Texas, and this should help keep overnight lows a few degrees warmer than last night in most areas. The high-level cirrus clouds will gradually thin/depart the region during the day tomorrow.