Aikyam-Lab/Synoptic-Bench huggingface dataset:
The parent upper level trough was still digging digging southward across the TN/OH River Valley. Recent IR trends indicated cooling upper level cloud tops across the deep south ahead of the upper level trough and thus continued with isolated showers for SE GA. The low will pass across the local area tonight with rainfall decreasing after midnight and pushing east of the area trailed by lowering clouds and patchy fog through sunrise as low temperatures fall into the 50s under WNW winds.
Trough aloft will move slowly eastward across the deep south with large scale ascent staying to our north. The low clouds may persist until late Sunday morning. High pressure ridge over the Atlantic was providing a southerly wind flow. The ridge will retreat seaward as a weak cold front sags into the waters on Sunday.
946 PM EST Sat Feb 18 2017 A warm front will push further northwards this evening and will be followed by a secondary cold front on Sunday.
551 PM EST Sat Feb 18 2017 Low pressure tracks along southern Canada, and into northern New England tonight, and then into the Canadian Maritimes Sunday into Sunday night. A cold front with the low passes through the region late tonight into Sunday morning. High pressure builds in behind the low Sunday night.
A BROAD AREA OF LOW PRESSURE OVER THE MIDWEST IS EXPECTED TO SHIFT OVER THE UPPER OHIO VALLEY BY SUNDAY MORNING. A WARM FRONT HAS HELPED FORM STRATIFORM RAIN THIS AFTERNOON AND THUS CATEGORICAL POPS REMAIN IN THE FORECAST UNTIL SUNDAY MORNING WHEN THE CENTER OF LOW PRESSURE EXITS EAST. STRONG UPPER LEVEL FORCING SEEMS LESS FAVORABLE FOR SUNDAY AFTERNOON AS THE UPPER LOW IS PROGGED TO PHASE WITH THE TROUGH ACROSS THE WESTERN GREAT LAKES. UNCERTAINTY REMAINS IN THE APPROACH OF THE SECONDARY LOW PRESSURE AND BREAKS IN CLOUDS. A BLEND OF MODEL DATA WAS USED DUE TO THE UNCERTAINTY WITH THE EVOLUTION OF THE LATE SUNDAY LOW PRESSURE. LOW PRESSURE WILL TRACK FROM EASTERN OHIO TO WESTERN NEW YORK SUNDAY NIGHT.
255 PM CDT SAT APR 30 2016 SURFACE ANALYSIS HAS 1004MB LOW PRESSURE CENTER OVER SOUTHEAST NE/SOUTHWEST CORNER OF IA. BRISK EAST/NORTHEAST WINDS OF 15 TO 25 MPH COMBINED WITH THE RAIN/COOLER TEMPERATURES WAS PRODUCING A RATHER RAW DAY. BUT THEN MODELS SHOW THE MID-LEVEL CLOSED LOW/TROUGH ROTATE THROUGH SOUTHERN WI/NORTHERN IL BY AFTERNOON. STRENGTHENING MID-LEVEL DEFORMATION FRONTOGENESIS ASSOCIATED WITH THE TROUGH PRODUCES A RESURGENCE OF SHOWERS MAINLY ALONG/SOUTH OF THE I-90 CORRIDOR. SHOWERS DIMINISH SUNDAY EVENING AS THE TROUGH PULLS EAST.
TEMPERATURES INLAND FROM THE LAKE SHOULD BE NEAR NORMAL ON SUNDAY BUT CLOUDS AND EAST/NORTHEAST SURFACE FLOW WILL KEEP THINGS QUITE A BIT COOLER CLOSER TO LAKE MICHIGAN. SUNDAY NIGHT THROUGH SATURDAY MAIN FCST CONCERNS INCLUDE TIMING AND PCPN CHANCES ASSOCIATED WITH A STRONG COLD FRONTAL PASSAGE IN THE MIDDLE OF THE WEEK. AN UPPER TROF WILL STILL BE MOVG THROUGH OUR SE COUNTIES ON SUNDAY EVENING.
Light precip is expected to develop in wake of the front across parts of the PB especially btwn 15Z-21Z then dissipate and redevelop farther s into the Lower Trans Pecos/PB after 06Z/Mon. More seasonal temps are expected Wed-Fri with amplified mid level ridging making a presence.
314 PM EDT SAT APR 30 2016 LOW PRESSURE NEAR KC WILL MOVE NE ACROSS OHIO OVERNIGHT.
Satellite imagery today shows the Nation dominated by a large trough across the western 3/4 of the country. Locally, the surface reflection of the Central Plains trough started the morning in northwest Missouri, but is now opening up and shifting east across northern Missouri as a warm front lifts north.
Breezy day across the region as last night's weather system moves into Arizona and high pressure builds along the West Coast. Temperatures are a mixed bag today with mountain areas generally cooler than 24 hours ago with readings in the 40s and 50s (continuing cold advection in the mid-levels) while the Central Valley is running about 4-8 degrees warmer with temps in the upper 70s and lower 80s under sunshine and some compressional warming. Eastern Pacific ridge develops into blocking high over the northern Rockies on Sunday allowing some portion of the SW low to retrograde back into NorCal from the east.
COASTAL STRATUS RETURNS TO THE COAST LATE SUNDAY AS HIGH PRESSURE WEAKENS.
A few showers remain in the area, mainly north of I70 as the upper low continues to spin over south central Nebraska and usher eastward enough cooling aloft to support some pockets of light rain. As the upper low moves eastward, the cooler air to our north comes southward into the state, with highs tomorrow still only in the 50s to near 60 in the southeast counties.
315 PM CDT SAT APR 30 2016 There remains the potential for a few severe thunderstorms to develop late this afternoon and early this evening along and south of a warm front that lies from west northwest to east southeast across the area.
AN AREA OF LOW PRESSURE WILL KEEP A CHANCE OF SHOWERS OVER THE AREA THIS EVENING BEFORE EXITING TO THE EAST.
227 PM CDT SAT APR 30 2016 THE 19Z SURFACE ANALYSIS INDICATED THAT A WARM FRONT WAS EXTENDING SOUTHEAST FROM SOUTHEAST MISSOURI THROUGH NORTHWEST TENNESSEE AND THROUGH NORTHWEST ALABAMA TO ALONG THE TENNESSEE RIVER ACROSS THE FORECAST AREA. DEWPOINT TEMPS WERE INCREASING TO THE SOUTH OF THE WARM FRONT INTO THE MID TO UPPER 60S ACROSS WEST CENTRAL THROUGH CENTRAL ALABAMA ALSO AS OF 19Z.
MID AND HIGH LEVEL CLOUDS ARE QUICKLY OVERSPREADING THE AREA AS WARM ADVECTION ALOFT IS INCREASING IN ADVANCE OF A NORTHEASTWARD TRANSLATING WARM FRONTAL BOUNDARY. DEEPER MOISTURE IS FOLLOWING QUICKLY ON THE HEELS OF THE HIGH CLOUDS WITH LIFT IN THE 300-310K LAYER QUICKLY SATURATING THE LIFTED LAYER AND STRATIFORM RAIN MOVING NORTHEASTWARD ACROSS EASTERN OHIO AT THIS HOUR. AS THE WARM FRONT PROGRESSES NORTHEASTWARD OVERNIGHT. FRIES LOW PRESSURE WILL TRACK FROM EASTERN OHIO TO WESTERN NEW YORK SUNDAY NIGHT.
The low is expected to weaken and move eastward this afternoon with the cold front advancing and warm front moving slowly northward. SBCAPE on the order of 1000-1800 j/kg is expected to evolve supporting development of scattered thunderstorms along/ahead of the cold front between 19-21z between KCOU-KSTL.
332 PM EDT SAT APR 30 2016 WEAK HIGH PRESSURE WILL BE ACROSS THE REGION EARLY TONIGHT. THE HIGH WILL THEN MOVE OFFSHORE AS LOW PRESSURE ADVANCES UP THE OHIO VALLEY.
657 PM EDT SAT APR 30 2016 LOW PRESSURE OVER THE MID MISSISSIPPI VALLEY WILL MOVE EAST ACROSS OHIO OVERNIGHT.
THE NORTHERN BRANCH H500 HIGH REMAINS OVER SOUTHERN CANADA AND NORTHERN NORTH DAKOTA WHILE THE H500 UPPER LOW CONTINUES TO SPIN ACROSS THE NEBRASKA/SOUTH DAKOTA REGION. THIS CLOSED LOW WILL EVENTUALLY KICK OUT ON SUNDAY. HOWEVER THE REMNANTS OF A LONGWAVE TROUGH WILL REMAIN OVER THE SOUTHWEST CONUS WITH THE H500 RIDGE FIRMLY IN PLACE ACROSS ALBERTA/SASKATCHEWAN. OVERNIGHT LOWS TONIGHT WILL BE IN THE LOW TO MID 30S WITH HIGHS SUNDAY IN THE 60S WITH SUNNY SKIES WITH JUST A FEW HIGH CLOUDS SOUTH.
540 PM CDT SAT APR 30 2016 There remains the potential for a few severe thunderstorms to develop late this afternoon and early this evening along and south of a warm front that lies from west northwest to east southeast across the area.
105 PM CDT SAT APR 30 2016 FOR 18Z TAFS /ISSUED 1117 AM CDT SAT APR 30 2016/ A LINE OF SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP AHEAD OF A PRE-FRONTAL TROUGH AXIS EXTENDING FROM NORTHWEST MISSISSIPPI SOUTHWEST INTO NORTHEAST LOUISIANA. MORE MOIST SURFACE CONDITIONS ARE IN PLACE WITH DEWPOINTS IN THE LOWER 60S. LIKELY ASSOCIATED WITH THE WARM FRONT OVER CENTRAL ALABAMA SLOWLY PUSHING NORTHWARD. MODELS ARE FAIRLY CONSISTENT WEAKENING THE NORTHERN PORTION OF THE LINE OF SHOWERS AND THUNDERSTORMS AHEAD OF THE PRE-FRONTAL TROUGH AXIS THIS MORNING. TEMPERATURES IN THE LOWER 80S LOOK REASONABLE.
258 PM CDT SAT APR 30 2016 SLOW-MOVING UPPER LOW OVER MID-AMERICA WILL SUPPORT MOSTLY CLOUDY SKIES AND BELOW NORMAL TEMPERATURES THE NEXT FEW DAYS.
323 PM EDT SAT APR 30 2016 HIGH PRESSURE WILL SHIFT OFFSHORE TONIGHT.
UPPER LOW SPINNING ACROSS WEST CENTRAL NEBRASKA WILL DRIFT EAST OVERNIGHT INTO OUR AREA. AGAIN WITH HEAVIEST AMOUNTS ALONG/JUST NORTH OF THE CLOSED LOW CIRCULATION WHICH WILL AFFECT AREAS NORTH OF I80.
258 PM CDT SAT APR 30 2016 THE UPPER LEVEL LOW WILL RELUCTANTLY DRIFT EAST ACROSS SOUTHERN NEBRASKA OVERNIGHT. MOISTURE WRAPPING BACK AROUND THE LOW WILL ACT ON AN AREA OF MID-LEVEL DEFORMATION FOR CONTINUED PRECIPITATION CHANCES ACROSS THE CWA. TEMPERATURES WILL ONLY FALL OFF A FEW DEGREES FROM THE HIGHS TODAY.
1155 AM MDT SAT APR 30 2016 UPPER LOW SLOWLY PULLING AWAY FROM THE REGION EARLY THIS MORNING. UPPER LOW MAKES ONLY VERY MINOR PROGRESS EASTWARD THROUGH THE HIGH PLAINS. CLOUDS SHOULD KEEP MIN TEMPS FROM DROPPING TOO FAR BELOW FREEZING AT LOWER ELEVATIONS. NEXT LOW PRESSURE SYSTEM. THIS SYSTEM WILL BRING ANOTHER ROUND OF SOME MODERATE SNOWFALL TO THE HIGHER ELEVATIONS.
Otherwise expect sky cover to continue clearing from west to east as drier airmass behind the cold front spreads across the area and main area of low pressure over the central Plains pushes eastward toward the Ohio Valley. Still looks like we will have temperatures about 10 to 15 degrees cooler on Sunday.
239 PM CDT SAT APR 30 2016 NORTHWEST WINDS OUT OF A HIGH PRESSURE CENTERED OVER EASTERN CANADA HAS SHIELDED MOST OF THE CWA FROM PRECIPITATION.
ASSOCIATED WITH AN UPPER LEVEL LOW PRESSURE SYSTEM OVER NEBRASKA AND KANSAS. THE UPPER LOW WILL BECOME AN OPEN WAVE ON SUNDAY WHILE MOVING TO THE WESTERN GREAT LAKES BY EVENING.
/ISSUED 738 AM EDT SAT APR 30 2016/ WEAK FRONT VICINITY OF NORTH GA TODAY SHOULD GRADUALLY PUSH NORTH THROUGH TONIGHT AS A WARM FRONT. INITIALLY LOW PRESSURE OVER THE OHIO VALLEY WILL LIFT TO THE NE.
Scattered clouds around 4kft are building across the area this afternoon and in addition, the high clouds will increase throughout the day. The 06z analysis depicts a large upper level trough over the western half of the country with ridging off the southeast coast.
320 PM PDT SAT APR 30 2016 CLEARING SKIES AND WARMER TEMPERATURES NEXT SEVERAL DAYS AS WEAK HIGH PRESSURE MOVES OVER THE REGION. UPPER LOW PRESSURE CENTER IS MOVING SE INTO WESTERN AZ ATTM. WEAK RIDGING OVERNIGHT BEFORE ANOTHER UPPER LEVEL LOW CENTER WILL MOVE SSW FROM IDAHO INTO NRN CA ON SUNDAY PROVIDING AN INCREASED CHANCE OF SHRA AND TSRA SUNDAY AFTERNOON AND EVENING IN THE SIERRA.
An upper level low currently over Nebraska will continue to slowly spin eastward tonight and into the Upper Mississippi Valley tomorrow. Meanwhile, a secondary upper level low will dig into the Four Corners region tonight then into the Southern Rockies tomorrow. As for temperatures, lows tonight are expected to range from the lower 30s across west central Kansas to lower 40s across south central Kansas. Highs tomorrow look to range from the lower 50s across west central Kansas to around 60 degrees across south central Kansas.
A LARGE UPPER LOW CONTINUES TO MOVE ACROSS THE PLAINS THIS AFTERNOON WITH A SHORT WAVE PASSING TO THE SOUTH ALONG THE OF THE LARGER LOW.
302 PM EDT SAT APR 30 2016 CURRENTLY - AN AREA OF HIGH PRESSURE IS SPREADING SOUTHWARD OFF THE ATLANTIC COAST. REINFORCING A WEAKER RIDGE STRETCHING ACROSS THE FLORIDA PENINSULA. SKIES ARE PARTLY CLOUDY MOSTLY DUE TO PATCHES OF THICK CIRRUS RIDING SOUTHEASTWARD AROUND A DIRTY RIDGE. RAIN CHANCE WILL REMAIN OUT OF THE FORECAST AS MID AND UPPER LEVEL RIDGING WILL CONTINUE TO SUPPORT DRY AIR ALOFT AND A LOW INHIBITION LAYER. WINDS WILL BEGIN TRENDING DOWNWARDS SUNDAY AS THE RESPONSIBLE HIGH BEGINS MIGRATING EASTWARD INTO THE OPEN ATLANTIC AND A TROUGH MOVES INTO THE EASTERN UNITED STATES. MID AND UPPER LEVEL RIDGING WILL FLATTEN OUT THROUGH THIS PERIOD.
311 PM CDT SAT APR 30 2016 UPPER LEVEL LOW PRESENTLY SPINNING THROUGH CENTRAL NEBRASKA WILL MOVE ONLY SLOWLY EASTWARD TONIGHT AND TOMORROW. AS RAINFALL HAS BEEN CUT OFF THROUGH MOST OF NORTHWEST IA AND THE LOWER MISSOURI VALLEY. THOUGH DIMINISHING FROM NORTH TO SOUTH DURING THE NIGHT AS THE UPPER LEVEL LOW SHIFTS EASTWARD/FORCING WEAKENS/AND DRIER AIR IS PULLED SOUTHWARD. ON SUNDAY THE LOW CONTINUES TO SLOWLY PULL AWAY FROM THE AREA. WITH RAIN CHANCES CONTINUING THROUGH THE LOWER MISSOURI RIVER VALLEY INTO NORTHWEST IOWA DURING THE FIRST PART OF THE DAY. AND LOOKING AT TEMPERATURES A LITTLE WARMER. A WEAK RIDGE OF HIGH PRESSURE WILL WORK ACROSS THE CWA ON SATURDAY NIGHT LEADING TOWARDS CLEARING SKIES AND LIGHT WINDS.
THE UPPER LOW OVER KANSAS WILL CONTINUE TO PROVIDE A COOL EASTERLY UPSLOPE FLOW ACROSS OUR FORECAST AREA. GIVEN THE LOW LEVEL MOISTURE AND PARTIALLY CLEARING SKIES.
304 PM CDT SAT APR 30 2016 LOW LEVEL DRY AIR CONTINUES ADVECTING INTO THE AREA BEHIND A COLD FRONT NOW ENTERING CENTRAL AND SOUTHEAST TEXAS THIS AFTERNOON.
Upper level ridge axis shifts eastward tonight over the Atlantic and northeast CONUS while a cold front across the plains this afternoon slowly shifts eastward into the MS valley. Hi-res models have pegged this area with the higher PoPs and with this forecast package have increased and expanded the PoPs for this afternoon slightly.
454 PM CDT SAT APR 30 2016 THE UPPER AIR PATTERN THIS AFTERNOON FEATURES A DEPARTING LOW PRESSURE SYSTEM TO OUR NORTHEAST. AND THE NEXT UPPER LOW CURRENTLY DIGGING INTO THE DESERT SOUTHWEST IS QUICKLY ON ITS HEELS. A BRIEF DRIER AND WARMER MIDWEEK STRETCH. AND THE COOLER AIR WILL CONTINUE TO FILTER INTO THE AREA WITH COLD AIR ADVECTION CONTINUING THROUGH SUNDAY NIGHT. AS TEMPERATURES THERE HAVE THE GREATEST LIKELIHOOD OF DROPPING TO OR JUST BELOW FREEZING TONIGHT. THE NEXT APPROACHING LOW PRESSURE SYSTEM WILL INITIATE ISENTROPIC LIFT OVER THE COOLER SURFACE AIRMASS TONIGHT INTO TOMORROW AND POSSIBLY LEAD TO SHOWERS MOVING ACROSS THE PANHANDLES.
RAIN CHANCES CONTINUE TO INCREASE LATE SUNDAY NIGHT AS A STRONG COLD FRONT MOVES INTO THE NRN CWA.
COLD FRONT JUST TO THE WEST OF THE FCST AREA REMAINS JUST TO THE WEST TONIGHT THROUGH SUNDAY. GENERALLY IN THE LOW TO MID 80S.
303 PM MDT SAT APR 30 2016 AREAS OF LIGHT RAIN AND SNOW CONTINUE ACROSS THE AREA AS WRAP AROUND MOISTURE FROM THE UPPER LOW OVER KANSAS AND NEBRASKA CONTINUES TO PUSH IN. TEMPERATURES WILL BE WARMER TOMORROW.
An upper level low currently over Nebraska will continue to slowly spin eastward tonight and into the Upper Mississippi Valley tomorrow. Meanwhile, a secondary upper level low will dig into the Four Corners region tonight then into the Southern Rockies tomorrow. As for temperatures, lows tonight are expected to range from the lower 30s across west central Kansas to lower 40s across south central Kansas. Highs tomorrow look to range from the lower 50s across west central Kansas to around 60 degrees across south central Kansas. The next closed low will be near Phoenix at sunrise Sunday, but rapidly weaken into a weak open wave as it arrives in Kansas late Sunday and Sunday night.
149 PM EDT SAT APR 30 2016 TODAY WILL BE DRY, WITH NEAR SEASONABLE TEMPERATURES, THANKS TO HIGH PRESSURE, EXTENDING SOUTHWARD OUT OF CANADA.
ESPECIALLY SOUTHWEST THAT WILL INCREASE THE CLOUDS AND KEEP TEMPERATURES THERE IN THE LOW TO MID 50S. HIGH PRESSURE OVER THE SOUTHERN PRAIRIE PROVINCES OF CANADA AND LOW PRESSURE OVER THE CENTRAL PLAINS IS PRODUCING A NORTHEAST TO EAST FLOW ACROSS WESTERN AND CENTRAL THIS MORNING. THIS AREA WILL ALSO SEE OUR WARMEST TEMPERATURES AND LOWEST AFTERNOON HUMIDITIES DUE TO THE PROXIMITY OF THE SURFACE AND UPPER LEVEL HIGH PRESSURE. IT LOOKS LIKE THE STRONGEST WINDS WILL NOT CORRESPOND WITH THE LOWEST AFTERNOON HUMIDITIES GIVEN THE EXPECTED DIMINISHING WIND SPEEDS FROM MID TO LATE AFTERNOON. UPPER LEVEL RIDGING BUILDING OVER THE WESTERN U.
429 PM CDT SAT APR 30 2016 WATER VAPOR IMAGERY CONTINUES TO SHOW AN IMPRESSIVE UPPER LEVEL LOW LIFTING NORTH INTO SOUTHERN NEBRASKA THIS AFTERNOON.
STRONG HIGH PRESSURE WILL BUILD OVER THE REGION FOR THE REMAINDER OF THE WEEKEND.
CHATTANOOGA AIRPORT, TN 81 63 80 63 / 50 70 60 40 KNOXVILLE MCGHEE TYSON AIRPORT, TN 79 63 81 63 / 60 70 60 50 OAK RIDGE, TN 78 63 81 62 / 60 80 60 50 TRI CITIES AIRPORT, TN 78 60 79 58 / 60 70 70 60.
424 PM CDT SAT APR 30 2016 LATEST SURFACE ANALYSIS SHOWED A DEEP 1001MB LOW OVER MISSOURI WITH A COLD FRONT EXTENDING SOUTH SOUTHWEST TO NORTHWEST LOUISIANA TO CENTRAL TEXAS COAST.
IFR/MVFR ceilings across much of Eastern Oklahoma and Northwest Arkansas will continue to slowly erode and lift back to VFR conditions this afternoon as a cold front exits the region. low level ceilings were rotating through the region around the main upper low. the cold front will continue to make progress through far Eastern Oklahoma and Northwest Arkansas. the drier air trying to wrap into the upper low looks to move into and through Eastern Oklahoma and Northwest Arkansas this afternoon/tonight.
323 PM CDT SAT APR 30 2016 DRY AIR SPREADING INTO THE NORTHERN AREAS - LIGHT AND VARIABLE WINDS WITH LOW LEVEL EASTERLY FLOW IN PLACE ACROSS THE SOUTH AND DEWPOINTS IN THE LOWER 60S TO MID 70S. COASTAL TROUGHING ALONG THE LOWER COAST EXTENDING UP INTO SETX THIS AFTERNOON IN THE WAKE OF THIS MORNINGS STORMS.
HIGHS SHOULD BE CLOSE OR A FEW DEGREES WARMER THAN TODAY.
WEAK COLD FRONT JUST EAST OF I-35. /ISSUED 1230 PM CDT SAT APR 30 2016/ WATER VAPOR IMAGERY CONTINUES TO SHOW AN IMPRESSIVE UPPER LEVEL LOW LIFTING NORTH INTO SOUTHERN NEBRASKA.
MID AFTERNOON READINGS WERE IN THE LOW TO MID 70S. AN UPPER LEVEL LOW WILL SPIN FROM THE CENTRAL PLAINS TO THE MID MS VALLEY REGION OVERNIGHT AS A COUPLE OF WEAK SURFACE WAVES MOVE FROM THE MID MS VALLEY TO OHIO VALLEY. THE LOW PRESSURE SYSTEMS WILL CONTINUE TO MOVE EASTWARD.
1230 PM CDT SAT APR 30 2016 WATER VAPOR IMAGERY CONTINUES TO SHOW AN IMPRESSIVE UPPER LEVEL LOW LIFTING NORTH INTO SOUTHERN NEBRASKA.
MAIN UPPER LOW ACROSS THE CENTRAL PLAINS THIS AFTERNOON WILL FINALLY OPEN/SHEAR EAST THROUGH THE AREA SUNDAY EVENING.
1004 AM PDT SAT APR 30 2016 CLEARING SKIES AND WARMER TEMPERATURES NEXT SEVERAL DAYS AS WEAK HIGH PRESSURE MOVES OVER THE REGION. UPPER LOW CENTER OVER NV ATTM BROUGHT A TROUGH THROUGH OVERNIGHT WITH A FEW SHRA.
1134 AM MDT SAT APR 30 2016 THE UPPER LOW WILL BE OVER NORTHWEST/NORTHCENTRAL KANSAS TODAY AND THEN MOVE INTO NORTHEAST KANSAS TONIGHT. ANOTHER BROAD TROUGH WILL EXIST OVER THE DESERT SOUTHWEST.
LOW PRESSURE IS LOCATED OVER NORTH CENTRAL MISSOURI WITH HIGH PRESSURE BUILDING SOUTH ALONG THE COLORADO FRONT RANGE. INTO THE DAKOTAS THEN SOUTH ACROSS THE HIGH-PLAINS. AS THE LOW DEPARTS. ANTICIPATE A REDUCTION IN THE PRECIPITATION COVERAGE ACROSS THE HIGH PLAINS. BEGINS TO EJECT OVER THE HIGH PLAINS TOMORROW AFTERNOON. WARMER TEMPERATURES ARE FORECAST TOMORROW BUT THERE IS SOME HESITATION ON HOW WARM TO GO OVER EAST COLORADO WITH SNOW LIKELY STILL ON THE GROUND.
247 PM EDT SAT APR 30 2016 HIGH PRESSURE ACROSS THE REGION WILL SLOWLY MOVE EAST SUNDAY.
LOW PRESSURE WILL MOVE EAST ALONG THIS BOUNDARY BRINGING WIDESPREAD RAIN TONIGHT INTO SUNDAY MORNING. THOUGH BECOMING WARMER AS LO LVL FLO TURNS MORE SSWLY. A TROUGH OF LO PRES CROSSING THE AREA MAY COMBINE W/ HEATING TO AID IN DEVELOPMENT OF SHRAS/TSTMS MON AFTN/EVE (ESP SE VA/NE NC). RETAINED SOME POPS INTO THU AS WELL WITH AN UPR-LEVEL TROF OVER THE ERN CONUS. A WARM FRONT LIFTS THROUGH THE AREA LATE TONIGHT WITH AN INCREASING CHC FOR -RA AT RIC AND SBY. NE FLOW 10-15 KT WILL CONTINUE TODAY WITH HIGH PRESSURE CENTERED TO THE NORTH OF THE LOCAL AREA. THIS LOW WILL BRING A COLD FRONT INTO THE LOCAL AREA MON MORNING.
1 minute vis imagery shows thin areas in the high clouds. So some warming into the lower 70s observed. Best instability setting up across central into southern MO where more sun is coupled with cooler temperatures aloft.
DRY AND WARMER WEATHER CONDITIONS ARE EXPECTED THROUGH THE WEEKEND AS HIGH PRESSURE REBUILDS OVER THE REGION. COOLER AND UNSETTLED WEATHER CONDITIONS WITH A CHANCE OF SHOWERS WILL RETURN BY THE MIDDLE OF THE COMING WEEK. AN UPPER RIDGE OF HIGH PRESSURE WILL SHARPEN OVER THE EXTREME E PACIFIC OVER THE NEXT DAY OR SO.
205 PM EDT SAT APR 30 2016 A STATIONARY FRONT NEAR THE NORTH AND SOUTH CAROLINA BORDER TODAY WILL LIFT NORTH AS A WARM FRONT TONIGHT.
A cold front is expected early Sunday morning with gusty NE winds at all terminals by mid morning. /issued 252 AM CDT SAT APR 30 2016/ A weakening upper level low pressure system is forecast to move eastward through tonight along the Nebraska, Kansas border. Behind this system a weak cold front across the northern Permian Basin and eastern New Mexico Plains will settle south towards the Pecos River this morning and then push back east toward the northeast Permian basin this afternoon due to heating and mixing. For tonight the cold front will intensify and make a renewed surge to the south toward the Pecos River. In the meantime the next southern stream upper level low pressure system will settle into Arizona by 12z Sunday Morning.
634 PM EDT SAT APR 30 2016 HIGH PRESSURE ACROSS THE REGION WILL SLOWLY MOVE EAST SUNDAY.
AN AREA OF LOW PRESSURE MOVING FROM WEST TO EAST OFF TO OUR SOUTH IS RESPONSIBLE FOR TONIGHT/S RAIN.
WATER VAPOR IMAGERY SHOWING UPPER LOW CURRENTLY OVER THE KANSAS/NEBRASKA BORDER SOUTH SOUTHEAST OF NORTH PLATTE. NOT GETTING A WHOLE LOT OF ACCUMULATIONS THIS AFTERNOON AS TEMPERATURES FROM AREA METARS ARE ABOVE FREEZING. LATEST WYDOT ROAD TEMPERATURES STILL WELL ABOVE FREEZING THIS AFTERNOON. UPPER LOW CONTINUES TO MOVE NORTHEAST INTO EASTERN NEBRASKA THIS AFTERNOON AND EVENING. SO THE LOW POP FORECAST LOOKS PRETTY GOOD.
High pressure will begin to build overnight, helping to further dry conditions out. As a result of this, many locations (especially those in the mostly-clear valleys of northwest Montana) should anticipate temperatures potentially dipping below freezing tonight.
WIND DRIVEN AND STEEP TO VERY STEEP SEAS ARE EXPECTED TODAY AND TONIGHT AS A THERMAL TROUGH STRENGTHENS ALONG THE COAST AND BRINGS INCREASED NORTH WINDS. THE THERMAL TROUGH WILL WEAKEN SUNDAY INTO SUNDAY NIGHT WITH WINDS AND SEAS GRADUALLY SUBSIDING.
A cold front has moved into the area today, turning winds to light northerly or light and variable. A weak cold front moving through the area will shift winds around to the east and northeast, but will remain at 10 knots or less. A cold front sliding through West Central Texas will allow for a cooler air mass to settle into at least about the northeast half of the area. Lows in the lower 50s north to lower 60s south.
THICKER CLOUD COVER AND PRECIPITATION PROVIDED COOLER TEMPERATURES. WILL SEE ANOTHER CHANCE AT A ROUND OF SHOWERS AND THUNDERSTORMS SUNDAY EVENING AHEAD OF AN APPROACHING COLD FRONT.
1245 PM CDT SAT APR 30 2016 Large-scale upper low spinning across the Central High Plains this morning. prevailing thought heading out of the gate this morning is that most of the region will see long periods of dry conditions as forcing for assent from the main upper low remains west and main southern stream speed max remains well south. Lgt shwr activity to remain across northern portions of the fcst area tonight and again through portions of Sunday morning as inverted trough/upper low combine remain over the area.
TEMPERATURES SHOULD RANGE FROM THE LOWER 40S NORTH TO NEAR 60 AT FALLS CITY. LARGE PLUME OF MOISTURE WAS IMPLIED ON SATELLITE LOOPS ARCING AROUND THE LOW FROM ARKANSAS INTO MISSOURI THEN NORTHWEST AND WEST ACROSS IOWA AND NEBRASKA. TROWAL/DEFORMATION REGION IN THE NORTHEAST THROUGH NORTHWEST QUADRANTS OF THE LOW WILL CONTAIN WIDESPREAD LIGHT TO MODERATE RAINS BOTH TODAY AND TONIGHT. LOW THEN WEAKENS ON SUNDAY AS IT IS ENVELOPED INTO BROADER TROUGH IN THE GREAT LAKES. WHAT IS LEFT BEHIND FOR THE BEGINNING OF THE WORK WEEK IS GENERALLY BROAD CYCLONIC FLOW OVER THE PLAINS ATTENDANT TO GREAT LAKES TROUGH.
HIGH PRESSURE OFF THE NEW ENGLAND COAST WILL MOVE FURTHER OFFSHORE TONIGHT.
At the surface, while pressure falls result in far west Texas from the passing trough, high pressure will continue to build south into the southern Plains, pushing a cold front through our area and into the mountains of west Texas.
A cold front will sweep across the region on Friday, bringing a chance of showers and thunderstorms.
Most activity will take place over the high terrain near the Continental Divide and most particularly across southwest Montana, including KBTM.