Alert archive / New Jersey / Winter Weather Advisories in 2013
Winter Weather Advisory 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter weather advisory at Jan 27, 2013, 3:40 PM EST for 4 states. It took effect at Jan 28, 2013, 6:00 AM EST. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Jan 27, 2013, 3:40 PM EST (20:40 UTC)
- In effect from
- Jan 28, 2013, 6:00 AM EST
- Expired
- Jan 28, 2013, 9:13 PM EST
- In force
- 15 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 22 counties
New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Morris County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 20:41 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 208 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 806 m above ground
- 0-6 km bulk shear
- 100 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
624 WWUS41 KPHI 272040 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 340 PM EST SUN JAN 27 2013 DEZ001-MDZ008-NJZ007>010-015-PAZ060>062-070-071-101>106-281000- /O.NEW.KPHI.WW.Y.0005.130128T1100Z-130128T1900Z/ NEW CASTLE-CECIL-WARREN-MORRIS-HUNTERDON-SOMERSET-MERCER-BERKS- LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER- EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS- LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...TRENTON...READING... ALLENTOWN...BETHLEHEM...EASTON...MEDIA...PHILADELPHIA... HONEY BROOK...OXFORD...WEST CHESTER...KENNET SQUARE... COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT... PERKASIE...MORRISVILLE...DOYLESTOWN 340 PM EST SUN JAN 27 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 2 PM EST MONDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...SLEET...AND FREEZING RAIN...WHICH IS IN EFFECT FROM 6 AM TO 2 PM EST MONDAY. * ACCUMULATIONS...SNOW ACCUMULATION OF UP TO 1 INCH...ALONG WITH AROUND A TRACE OF ICE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN AROUND THE MORNING COMMUTE...BEFORE CHANGING OVER TO A SLEET AND FREEZING RAIN MIXTURE BY LATE MORNING. PRECIPITATION IS EXPECTED TO CHANGE TO RAIN DURING THE AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW...SLEET...AND FREEZING RAIN WILL LEAD TO HAZARDOUS TRAVEL ON MONDAY. MANY SURFACES MAY BECOME ICY...ESPECIALLY UNTREATED AND ELEVATED SURFACES. * TEMPERATURES...IN THE UPPER 20S. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ NJZ001-PAZ054-055-281000- /O.NEW.KPHI.WW.Y.0005.130128T1100Z-130129T0400Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 340 PM EST SUN JAN 27 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 11 PM EST MONDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...SLEET...AND FREEZING RAIN...WHICH IS IN EFFECT FROM 6 AM TO 11 PM EST MONDAY. * ACCUMULATIONS...SNOW ACCUMULATION OF UP TO 1 INCH...ALONG WITH AROUND A TENTH OF AN INCH OF ICE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN AROUND THE MORNING COMMUTE...BEFORE CHANGING OVER TO A SLEET AND FREEZING RAIN MIXTURE BY LATE MORNING AND CONTINUING INTO THE AFTERNOON AND EVENING. * IMPACTS...THE COMBINATION OF SNOW...SLEET...AND FREEZING RAIN WILL LEAD TO HAZARDOUS TRAVEL ON MONDAY. MANY SURFACES WILL BECOME ICY...ESPECIALLY UNTREATED AND ELEVATED SURFACES. * TEMPERATURES...IN THE UPPER 20S. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
7 follow-up statements
283 WWUS41 KPHI 280841 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 341 AM EST MON JAN 28 2013 NJZ016>019-281900- /O.EXA.KPHI.WW.Y.0005.130128T1100Z-130128T1900Z/ SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- INCLUDING THE CITIES OF...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY 341 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 2 PM EST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW, SLEET AND FREEZING RAIN, WHICH IS IN EFFECT UNTIL 2 PM EST THIS AFTERNOON. * ACCUMULATIONS...SNOW ACCUMULATIONS OF A COATING, ALONG WITH A LIGHT GLAZE OF ICE POSSIBLE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN DURING THE MORNING COMMUTE, BEFORE MIXING WITH AND CHANGING TO SOME SLEET AND FREEZING RAIN. PRECIPITATION IS EXPECTED TO CHANGE TO PLAIN RAIN AROUND MIDDAY. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE UPPER 20S, THEN RISING ABOVE FREEZING TOWARD MIDDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ001-007-008-PAZ054-055-061-062-282100- /O.EXT.KPHI.WW.Y.0005.130128T1100Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 341 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW ACCUMULATION OF UP TO 1 INCH, ALONG WITH ABOUT 0.05 TO 0.10 INCHES OF ICE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN AROUND THE MORNING COMMUTE THEN MIX WITH SLEET, BEFORE CHANGING TO FREEZING RAIN AND RAIN. PRECIPITATION IS EXPECTED TO CHANGE TO RAIN DURING THE AFTERNOON, HOWEVER SOME AREAS OF THE LEHIGH VALLEY, THE POCONOS AND INTO NORTHWESTERN NEW JERSEY WILL HOLD ONTO FREEZING RAIN LONGER BEFORE TAPERING OFF. THERE IS HOWEVER THE POTENTIAL FOR SOME FREEZING DRIZZLE TO OCCUR TONIGHT. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE MID 20S, THEN RISING TO NEAR FREEZING THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ009-010-PAZ060-101-103-105-282100- /O.EXT.KPHI.WW.Y.0005.130128T1100Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 341 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING TO UP TO 1 INCH, ALONG WITH A FEW HUNDREDTHS OF AN INCH OF ICE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN AROUND THE MORNING COMMUTE THEN MIX WITH SLEET, BEFORE CHANGING OVER TO FREEZING RAIN AND RAIN BY LATE MORNING. PRECIPITATION IS EXPECTED TO CHANGE TO PLAIN RAIN DURING THE AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE MID TO UPPER 20S, THEN RISING ABOVE FREEZING THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ DEZ001-MDZ008-NJZ015-PAZ070-071-102-104-106-281900- /O.CON.KPHI.WW.Y.0005.130128T1100Z-130128T1900Z/ NEW CASTLE-CECIL-MERCER-DELAWARE-PHILADELPHIA-EASTERN CHESTER- EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...TRENTON...MEDIA... PHILADELPHIA...WEST CHESTER...KENNET SQUARE...NORRISTOWN... LANSDALE...MORRISVILLE...DOYLESTOWN 341 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING, ALONG WITH A LIGHT GLAZE OF ICE POSSIBLE. * TIMING...LIGHT SNOW IS EXPECTED TO BEGIN DURING THE MORNING COMMUTE, BEFORE MIXING WITH AND CHANGING TO SOME SLEET AND FREEZING RAIN. PRECIPITATION IS EXPECTED TO CHANGE TO PLAIN RAIN AROUND MIDDAY. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...MID TO UPPER 20S, THEN RISING ABOVE FREEZING FROM ABOUT MIDDAY ON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
021 WWUS41 KPHI 281152 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 652 AM EST MON JAN 28 2013 NJZ001-007-008-PAZ054-055-061-062-282100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 652 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW ACCUMULATION NEAR 1 INCH, ALONG WITH ABOUT 0.05 TO 0.10 INCHES OF ICE. * TIMING...SNOW AT VARYING INTENSITY WILL CONTINUE TO OVERSPREAD THE AREA EARLY THIS MORNING DURING THE COMMUTE THEN MIX WITH SLEET LATER THIS MORNING, BEFORE CHANGING TO FREEZING RAIN AND RAIN. PRECIPITATION IS EXPECTED TO CHANGE TO RAIN DURING THE AFTERNOON, HOWEVER SOME AREAS OF THE LEHIGH VALLEY, THE POCONOS AND INTO NORTHWESTERN NEW JERSEY WILL HOLD ONTO FREEZING RAIN LONGER BEFORE TAPERING OFF. THERE IS HOWEVER THE POTENTIAL FOR SOME FREEZING DRIZZLE TO OCCUR TONIGHT. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE MID 20S, THEN RISING TO NEAR FREEZING THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ DEZ001-MDZ008-NJZ015>019-PAZ070-071-102-104-106-281900- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T1900Z/ NEW CASTLE-CECIL-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-DELAWARE-PHILADELPHIA-EASTERN CHESTER- EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...MEDIA...PHILADELPHIA...WEST CHESTER... KENNET SQUARE...NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN 652 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION AROUND A COATING, ALONG WITH A LIGHT GLAZE OF ICE POSSIBLE. * TIMING...SNOW AT VARYING INTENSITY WILL OVERSPREAD THE AREA EARLY THIS MORNING DURING THE COMMUTE, BEFORE MIXING WITH AND CHANGING TO SOME SLEET AND FREEZING RAIN. PRECIPITATION IS EXPECTED TO CHANGE TO PLAIN RAIN AROUND MIDDAY. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...UPPER 20S, THEN RISING ABOVE FREEZING FROM ABOUT MIDDAY ON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ009-010-PAZ060-101-103-105-282100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 652 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING TO UP TO 1 INCH, ALONG WITH A FEW HUNDREDTHS OF AN INCH OF ICE. * TIMING...SNOW AT VARYING INTENSITY WILL OVERSPREAD THE AREA EARLY THIS MORNING DURING THE COMMUTE THEN MIX WITH SLEET, BEFORE CHANGING OVER TO FREEZING RAIN AND RAIN BY LATE MORNING. PRECIPITATION IS EXPECTED TO CHANGE TO PLAIN RAIN DURING THE AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE MID TO UPPER 20S, THEN RISING ABOVE FREEZING THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW... SLEET OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES... AND USE CAUTION WHILE DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
806 WWUS41 KPHI 281504 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1004 AM EST MON JAN 28 2013 NJZ001-007-008-PAZ054-055-061-062-290100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 1004 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW ACCUMULATION NEAR 1 INCH, ALONG WITH ABOUT 0.05 TO 0.10 INCHES OF ICE. * TIMING...SNOW AND SLEET WILL CHANGE TO FREEZING RAIN AND RAIN DURING THE LATE MORNING AND EARLY AFTERNOON. THE PRECIPITATION IS EXPECTED TO CHANGE TO RAIN DURING THE AFTERNOON, HOWEVER SOME AREAS OF THE LEHIGH VALLEY, THE POCONOS AND NORTHWESTERN NEW JERSEY WILL HOLD ONTO FREEZING RAIN FOR A WHILE BEFORE TAPERING OFF. THERE IS THE POTENTIAL FOR SOME FREEZING DRIZZLE TONIGHT. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...25 TO 30 DEGREES, RISING INTO THE LOWER AND MIDDLE 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ DEZ001-MDZ008-NJZ015>019-PAZ070-071-102-104-106-281900- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T1900Z/ NEW CASTLE-CECIL-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-DELAWARE-PHILADELPHIA-EASTERN CHESTER- EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...MEDIA...PHILADELPHIA...WEST CHESTER... KENNET SQUARE...NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN 1004 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING, ALONG WITH A LIGHT GLAZE OF ICE POSSIBLE. * TIMING...SNOW, MIXING WITH AND CHANGING TO SLEET, FREEZING RAIN AND RAIN THIS MORNING. THE PRECIPITATION IS EXPECTED TO CHANGE TO ALL RAIN AROUND MIDDAY. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE LOWER AND MIDDLE 30S THIS MORNING, RISING INTO THE MIDDLE AND UPPER 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ009-010-PAZ060-101-103-105-282100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 1004 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING UP TO 1 INCH, ALONG WITH A FEW HUNDREDTHS OF AN INCH OF ICE. * TIMING...SNOW CHANGING TO SLEET, FREEZING RAIN AND RAIN THIS MORNING. THE PRECIPITATION IS EXPECTED TO CHANGE TO ALL RAIN DURING THE AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE UPPER 20S AND LOWER 30S, RISING INTO THE MIDDLE 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
029 WWUS41 KPHI 281610 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1110 AM EST MON JAN 28 2013 DEZ001-MDZ008-NJZ016>019-PAZ070-071-102-281715- /O.CAN.KPHI.WW.Y.0005.000000T0000Z-130128T1900Z/ NEW CASTLE-CECIL-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- DELAWARE-PHILADELPHIA-EASTERN CHESTER- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... MEDIA...PHILADELPHIA...WEST CHESTER...KENNET SQUARE 1110 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ NJZ001-007-008-PAZ054-055-061-062-290100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 1110 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW ACCUMULATION NEAR 1 INCH, ALONG WITH ABOUT 0.05 TO 0.10 INCHES OF ICE. * TIMING...SNOW, SLEET AND FREEZING RAIN WILL CHANGE TO RAIN DURING THE AFTERNOON. HOWEVER, SOME AREAS OF THE LEHIGH VALLEY, THE POCONOS AND NORTHWESTERN NEW JERSEY WILL HOLD ONTO FREEZING RAIN FOR A WHILE BEFORE TAPERING OFF. THERE IS THE POTENTIAL FOR SOME FREEZING DRIZZLE TONIGHT. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...25 TO 30 DEGREES, RISING INTO THE LOWER AND MIDDLE 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ015-PAZ104-106-281900- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T1900Z/ MERCER-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...NORRISTOWN...LANSDALE... MORRISVILLE...DOYLESTOWN 1110 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING, ALONG WITH A LIGHT GLAZE OF ICE POSSIBLE. * TIMING...SNOW, SLEET AND FREEZING RAIN CHANGING TO ALL RAIN EARLY THIS AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE LOWER 30S, RISING INTO THE MIDDLE AND UPPER 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ009-010-PAZ060-101-103-105-282100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 1110 AM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW ACCUMULATION OF A COATING UP TO 1 INCH, ALONG WITH A FEW HUNDREDTHS OF AN INCH OF ICE. * TIMING...SNOW, SLEET AND FREEZING RAIN CHANGING TO ALL RAIN DURING THE AFTERNOON. * IMPACTS...THE COMBINATION OF SNOW, SLEET AND FREEZING RAIN WILL LEAD TO AREAS OF HAZARDOUS TRAVEL. UNTREATED SURFACES WILL BECOME SLIPPERY, ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE LOWER 30S, RISING INTO THE MIDDLE 30S FOR THIS AFTERNOON AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW, SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
797 WWUS41 KPHI 281910 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 210 PM EST MON JAN 28 2013 NJZ015-PAZ104-106-282015- /O.CAN.KPHI.WW.Y.0005.000000T0000Z-130128T1900Z/ MERCER-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...NORRISTOWN...LANSDALE... MORRISVILLE...DOYLESTOWN 210 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY HAS EXPIRED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ALLOWED THE WINTER WEATHER ADVISORY TO EXPIRE. COUNTY OFFICIALS REPORT PROBLEMS WITH ICING HAVE ENDED. $$ NJZ001-007-008-PAZ054-055-061-062-291000- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 210 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW HAS ENDED...WITH SNOW ACCUMULATIONS UP TO AN INCH. ICE ACCRUAL CONTINUES...WITH ABOUT 0.05 TO 0.15 INCHES OF ICE EXPECTED. THE GREATEST ICE ACCRUAL WILL BE OVER THE SOUTHERN POCONOS AND THE HIGHEST ELEVATIONS OF NORTHWEST NEW JERSEY. * TIMING...FREEZING RAIN IS EXPECTED TO TAPER TO FREEZING DRIZZLE DURING THE EVENING. THERE IS THE POTENTIAL FOR FREEZING DRIZZLE OVERNIGHT. * IMPACTS...TRAVEL WILL BE DIFFICULT. UNTREATED SURFACES WILL BE SLIPPERY...ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...FROM THE UPPER 20S TO LOWER 30S. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW... SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$ NJZ009-010-PAZ060-101-103-105-282100- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 210 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS AFTERNOON... * ACCUMULATIONS...SNOW HAS ENDED...WITH SNOW ACCUMULATIONS UNDER AN INCH. POCKETS OF ICE ACCRUAL CONTINUE...WITH A FEW HUNDREDTHS OF AN INCH OF ICE EXPECTED. * TIMING...POCKETS OF FREEZING RAIN WILL CHANGE TO RAIN DURING THE COURSE OF THE AFTERNOON. * IMPACTS...TRAVEL WILL BE DIFFICULT WHERE FREEZING RAIN LINGERS. UNTREATED SURFACES WILL BECOME SLIPPERY...ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...IN THE LOWER 30S. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW... SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
099 WWUS41 KPHI 282054 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 354 PM EST MON JAN 28 2013 NJZ009-010-PAZ060-101-103-105-282200- /O.CAN.KPHI.WW.Y.0005.000000T0000Z-130128T2100Z/ HUNTERDON-SOMERSET-BERKS-WESTERN CHESTER-WESTERN MONTGOMERY- UPPER BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 354 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ NJZ001-007-008-PAZ054-055-061-062-291000- /O.CON.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 354 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST TUESDAY... * ACCUMULATIONS...SNOW HAS ENDED...WITH SNOW ACCUMULATIONS UP TO AN INCH. ICE ACCRUAL CONTINUES...WITH ABOUT 0.05 TO 0.15 INCHES OF ICE EXPECTED. THE GREATEST ICE ACCRUAL WILL BE OVER THE SOUTHERN POCONOS AND THE HIGHEST ELEVATIONS OF NORTHWEST NEW JERSEY. * TIMING...FREEZING RAIN IS EXPECTED TO TAPER TO FREEZING DRIZZLE DURING THE LATE AFTERNOON AND EVENING. THERE IS THE POTENTIAL FOR FREEZING DRIZZLE OVERNIGHT. * IMPACTS...TRAVEL WILL BE DIFFICULT. UNTREATED SURFACES WILL BE SLIPPERY...ESPECIALLY BRIDGES AND OTHER ELEVATED SURFACES. * TEMPERATURES...FROM THE UPPER 20S TO LOWER 30S. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW... SLEET AND FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES. USE EXTRA CAUTION IF DRIVING. IT DOES NOT TAKE MUCH ICE TO QUICKLY CAUSE SLIPPERY CONDITIONS ON UNTREATED SURFACES. && $$
709 WWUS41 KPHI 290213 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 913 PM EST MON JAN 28 2013 NJZ001-007-008-PAZ054-055-061-062-290315- /O.CAN.KPHI.WW.Y.0005.000000T0000Z-130129T1000Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 913 PM EST MON JAN 28 2013 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE WINTER WEATHER ADVISORY. TEMPERATURES HAVE RISEN ABOVE FREEZING IN MOST LOCATIONS AND PRECIPITATION HAS ENDED, SO THE WINTER WEATHER ADVISORY IS BEING CANCELLED. $$
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this winter weather advisory went out at Jan 27, 1:04 PM EST, 2 hours 36 minutes earlier.
Area forecast discussion, Jan 27, 1:04 PM EST, 2 hours 36 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 104 PM EST SUN JAN 27 2013 .SYNOPSIS... A HIGH PRESSURE SYSTEM CRESTING THE APPALACHIANS WILL REACH THE FORECAST AREA THIS AFTERNOON AND MOVE OFFSHORE TONIGHT. A WARM FRONT IS FORECAST TO MOVE SLOWLY NORTHEAST THROUGH THE REGION LATER MONDAY INTO TUESDAY. A STRONG COLD FRONT WILL SWEEP THROUGH THE MIDDLE ATLANTIC STATES ON WEDNESDAY NIGHT. REINFORCING COLD FRONTS ARE THEN FORECAST TO MOVE THROUGH THE NORTHEAST FRIDAY AND SATURDAY NIGHT. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 12Z REGIONAL SOUNDINGS SHOW THAT THE SUBSIDENCE INVERSION HAS LOWERED QUITE A BIT FROM WHERE IT WAS 24 HOURS AGO. NOW IT SITS AROUND 4000 FEET ACROSS OUR WESTERN ZONES AND AROUND 5000 FEET TOWARDS THE EAST. THE SURFACE RIDGING IS CENTERED JUST TO OUR WEST THIS MORNING AND WILL SLOWLY MOVE TOWARDS OUR EAST TODAY. THIS WILL ALLOW PLENTY OF SUNSHINE TODAY WITH LIGHT WINDS OUT OF THE WEST-NORTHWEST. A SLIGHT DOWNSLOPING COMPONENT WILL HELP ADD TO TODAYS HIGH TEMPERATURES AS WINDS BACK MORE TOWARDS THE SOUTHWEST. MODEL SOUNDINGS SUGGEST THAT WE MIX FROM ABOUT 900 MB....AND THAT WOULD SUPPORT HIGHS FROM THE MID 20S IN THE TERRAIN TO THE MID 30S SOUTH. THIS IS MORE OR LESS IN LINE WITH THE MOS BLEND...SUGGESTING THAT PHILADELPHIA COULD CRACK THE FREEZING MARK FOR THE FIRST TIME IN ALMOST A WEEK. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 AM MONDAY/... MID LEVEL RIDGING CRESTS OVER THE REGION IN THE HOURS AROUND MIDNIGHT. THE RIDGING PROBABLY KEEPS THE MID LEVEL CLOUDS AT BAY...BUT CIRRUS SHOULD STREAM OVER THE TOP OF THE RIDGE. WINDS WILL BE LIGHT FOR MUCH OF THE NIGHT. THE COMBINATION OF LIGHT WINDS... MAINLY CLEAR SKIES THIS EVENING AND LOW DEW POINTS RAISES THE SPECTER OF A QUICK TEMPERATURE DROP IN THE EVENING. IT WOULD APPEAR AS THOUGH THE CIRRUS REMAINS THIN ENOUGH FOR THIS TO OCCUR. PROTECTED AREAS SHOULD PLUMMET THIS EVENING...THEN RECOVER SLOWLY LATE THIS EVENING AND OVERNIGHT. BECAUSE OF THIS...THE SLIGHTLY COLDER GFS MOS NUMBERS WERE FAVORED FOR LOWS. IN REALITY... LOWS PROBABLY OCCUR LATE THIS EVENING OR EARLY MONDAY MORNING...THEN REMAIN STEADY OR SLOWLY RISE WITH INCREASED CLOUD COVER. WARM AIR ADVECTION BEGINS IN THE MID LEVELS THIS EVENING...AND PEAKS AFTER 0600 UTC MONDAY. THE INITIAL SHOT OF WARM AIR ADVECTION GOES INTO MOISTENING THE COLUMN...ALLOWING MID LEVEL CLOUDS TO DEVELOP. THE WARM AIR ADVECTION PEAKS BETWEEN 0900 AND 1200 UTC MONDAY...AND THIS MAY BE ENOUGH TO FINALLY MOISTEN THE COLUMN WEST OF THE DELAWARE RIVER. THERE ARE SOME SHORT TERM MODEL DIFFERENCES WITH REGARD THE STRENGTH AND TIMING OF THE RELATIVE WARM AIR ADVECTION PEAK LATE TONIGHT (THE NAM IS ACTUALLY FASTER THAN THE GFS). THE TIMING DIFFERENCE IS MANIFESTED IN THE VERTICAL VELOCITY FIELDS...WHICH ARE ALMOST EXCLUSIVELY DRIVEN BY ISENTROPIC UPGLIDE. AT THIS POINT...WITH DRY AIR IN PLACE...A BLEND OF TIMING WAS USED. THE LEADING EDGE OF THE PRECIPITATION SHOULD BE APPROACHING THE LEHIGH VALLEY BY 0900 UTC...AND OVERSPREAD MUCH OF THE REST OF THE AREA CLOSET O 1200 UTC MONDAY. AT THIS POINT...IT APPEARS AS THOUGH PRECIPITATION TYPE SHOULD BE ALL SNOW...AS THE COLUMN IS DRY AND EVAPORATIVE COOLING WILL BE MAXIMIZED DURING THIS TIME. THE STRENGTH OF THE WARM AIR ADVECTION SUGGESTS THAT SNOW AMOUNTS SHOULD GENERALLY BE LESS THAN AN INCH THROUGH DAYBREAK...WITH THE HIGHEST AMOUNTS IN THE LEHIGH VALLEY. && .LONG TERM /MONDAY THROUGH SUNDAY/... A VERY ACTIVE LONG TERM IS IN STORE FOR OUR CWA WITH A LIKELY ADVISORY LEVEL IMPACT EVENT ON MONDAY AND MONDAY NIGHT, POSSIBLY A MULTI FACETED WIND AND HEAVY RAIN EVENT ON WEDNESDAY NIGHT AND THEN A SERIES OF COLD FRONTS WITH SNOW SHOWERS POSSIBLE LATER IN THE WEEK. THE WRF-NMMB INITIALIZED SLIGHTLY BETTER THAN THE GFS OFF THE 00Z SOUNDINGS. IT NOW JUMPED IN FRONT OF THE EC AS THE COLDEST MODEL. UPWIND THE 850MB TEMPS WERE AROUND 1C COLDER THAN INITIALIZED WHILE THE 925MB TEMPS WERE ABOUT 1C WARMER. OVERALL A SLIGHTLY LESS SLEETIER LOOKING SOUNDING. FOR THIS PACKAGE WE DID TAKE THE FORECAST COLDER ON MONDAY WHICH SEEMS LOGICAL GIVEN HOW COLD, STUBBORN AND DRY THIS AIR MASS IS. AFTER COLLABORATING WITH OUR NEIGHBORING OFFICES, WE DECIDED TO HOLD OFF ON ADVISORIES WITH THIS PACKAGE. THERE REMAINS TIMING ISSUES WITH THE HEAVIER PRECIPITATION (MORNING VS AFTERNOON) BETWEEN THE MODELS. THE LEANING TOWARD SNOW IN A BACK HANDED SENSE POSTPONES THE MOST HAZARDOUS PART OF THIS EVENT, THE ICE AND LENDS SOME UNCERTAINTY AS TO HOW SOUTHEAST TO GO WITH HEADLINES ONCE IT ARRIVES. WE WILL GIVE THE DAY SHIFT A CHANCE TO SEE ANOTHER SOUNDING RUN AND RECONCILE SOME OF THE ONGOING DIFFERENCES AND HOPEFULLY SEE A STABILIZATION IN THE THERMAL TRENDS. REGARDLESS WE WILL CONTINUE MENTION IN THE HWO AS THE ARRIVAL MAY COME IN TIME TO IMPACT PART OF THE MORNING COMMUTE ON MONDAY, ESPECIALLY WESTERN CWA. BAD TIMING AS THE SNOW ARRIVED JUST IN TIME TO SNARL THE FRIDAY EVENING COMMUTE AND MAY COME BACK JUST IN TIME TO IMPACT THE MONDAY MORNING COMMUTE. AS FOR THE METEOROLOGICAL FORCING, NEITHER THE WRF-NMMB NOR THE GFS WERE INTERNALLY CONSISTENT. THE GFS FCST ISENTROPIC LIFT SUPPORTED THE FASTER WRF-NMMB TIMING WHILE THE WRF-NMMB'S MID LEVEL FGEN FORCING SUPPORTED THE IDEA OF HEAVIER (RELATIVELY SPEAKING) PCPN HOLDING OFF TO THE AFTN LIKE THE GFS HAD. BOTH THOUGH HAD THE ENTRANCE REGION OF THE 250MB JET DEPARTING EARLY IN THE DAY ON MONDAY JUST AS THE PCPN IS SUPPOSE TO ARRIVE. THE VENTING THUS IS NOT THE BEST. (TU BGM) ALSO THE RIDGING IS FORECAST TO INCREASE AND WARMING ALOFT IS NEVER GOOD FOR PCPN. SO THE MODEL PERSPECTIVE OF A QUARTER INCH OR LESS OF WATER EQUIVALENT THROUGH MONDAY EVENING LOOKS REASONABLE. THE THERMAL FIELDS, THE GFS AND ECMWF TRENDED WARMER WHILE THE WRF-NMMB WAS MUCH COLDER, SO MUCH THAT IT NOW HAS THE EVENT NEARLY ALL SNOW IN PHL VS THE PREVIOUS SOUNDING RUN WHICH WAS ALL RAIN. JUST LIKE THAT THE 06Z RUN WENT WARMER AGAIN. THE ANTECEDENT AIR MASS IS DRY, SO WE WILL GIVE THE MORE SNOW POTENTIAL SOME CREDENCE. EVEN THE 00Z WRF-NMMB WARMS THE AIR ALOFT, THE DIFFERENCE BEING IT DOES NOT HAVE MUCH PCPN BEYOND THE MORNING WHILE THE OTHER MODELS TAKE SOME INTO THE AFTERNOON. SO LEANING THE WRF-NMMB WAY TOP DOWN WISE, WE ADDED MORE SNOW EARLY AND THE TRANSITION TO ICE STARTS AROUND NOON. SNOW AMOUNTS THROUGH NOON (PLEASE SEE THE MAPS ON OUR FB PAGE) ARE HALF AN INCH TO AROUND AN INCH. THERE SHOULD BE SOME SLEET MIXED IN, BUT NOT THE MAIN ENTREE. FOR THE AFTERNOON WE TOOK THE SLOWEST MODEL SFC TEMP PROGS AT TRANSITIONING FROM FREEZING RAIN TO RAIN. THE INITIAL TRANSITION INCLUSION WAS CLOSE TO THE I95 CORRIDOR. NO DENYING IT HAS BEEN COLD, SO IT MIGHT TAKE A COUPLE OF DEGREES ABOVE 32F TO STOP THE ICE THREAT. EVEN IF ITS INDIRECT SUN AT LEAST THE CURRENT FORECAST TRANSITION TIMING IS CLOSE TO THE STRONGEST PART OF THE DAY FOR INSOLATION WITH RESIDUAL SALT ON ALL ROADWAYS. BUT THE TRANSITION WILL BE SLOW TO THE NORTH AND SOME FREEZING RAIN SHOULD LAST INTO THE EVENING AT THE LEAST. ICE ACCUMULATIONS SHOULD BE AROUND A TENTH OF AN INCH OR LESS. WE WERE VERY CONSERVATIVE WITH RAISING TEMPERATURES. MODEL FORECAST SOUNDINGS ARE STILL LOSING ICE POTENTIAL ALOFT ON MONDAY NIGHT SO IT WILL BE EITHER RAIN/DRIZZLE OR FREEZING RAIN OR FREEZING DRIZZLE. MOST OF THE IMPULSES ARE EAST OF THE AREA BY MIDNIGHT, SO WHAT PCPN THERE IS SHOULD BE LIGHT AND BECOME LIGHTER. WE REMAINED SLOWER THAN STAT GUIDANCE IN RISING TEMPERATURES. TUESDAY AND TUESDAY NIGHT HAVE THE MAKINGS OF ANOTHER ONE OF THOSE GRAY DAYS WITH LOW CLOUDS AND MAYBE SOME DRIZZLE OR RESIDUAL LIGHT RAIN. TEMPERATURES WERE KEPT AT OR BELOW STAT GUIDANCE ON TUESDAY AND WERE PRETTY MUCH WAFFLING UNCHANGED OVERNIGHT. THE GFS REMAINS THE MOST ROBUST WITH THE LLJ ON WEDNESDAY WITH FORECAST SPEEDS REACHING AROUND 85 KTS. NOT SURPRISINGLY ITS ALSO THE WETTEST MODEL. FCST PCPN WATER VALUES ARE STILL SUPPOSE TO GET CLOSE TO 1.5 INCHES SO WE WILL HAVE TO CONTINUE TO MONITOR THE POTENTIAL FOR BOTH STRONG OR HIGH WINDS (EAST CWA) AND POSSIBLE FLOODING IF TRAINING ECHOES OCCUR. SPEAKING OF TRAINING, BECAUSE THE GFS AND ECMWF CONTINUE TO SHOW SOME INSTABILITY ALOFT, WE DID ADD ISOLATED THUNDER. UNLESS THE FRONT MOVES IN FASTER, WINDS ALOFT, EVEN 10 TO 20 PERCENT LESS, SHOULD BE ABLE TO SCOUR THE CHILLY AIR NEAR THE GROUND AND WE DID NOT DIFFER FROM STAT GUIDANCE WITH MAX TEMPS. THE COLD FRONT SHOULD MOVE THROUGH ON WEDNESDAY NIGHT AND FOR THE REST OF THE LONG TERM WE FOLLOWED A 50-50 BLEND OF LATEST HPC GUIDANCE AND CONTINUITY. THE TIMING OF SNOW SHOWERS WITH SUBSEQUENT COLD FRONTS WAS CLOSEST TO THE ECMWF. && .AVIATION /18Z SUNDAY THROUGH FRIDAY/... THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY AND SURROUNDING AREAS. A VFR FORECAST CONTINUES THROUGH THE EARLY OVERNIGHT AS WINDS REMAIN OUT OF THE WEST-NORTHWEST. A SLOW BACKING TOWARDS THE SOUTHWEST IS EXPECTED LATER THIS EVENING AS SURFACE HIGH PRESSURE SLIDES TO OUR EAST AND OFFSHORE. AS WINDS BACK MORE UPPER AND MID-LEVEL MOISTURE WILL BE PUSHED INTO THE REGION SO OUR MOSTLY CLEAR SKIES WILL BECOME OVERCAST AND LOWER THROUGH TOMORROW MORNING. ANOTHER FAST MOVING CLIPPER-LIKE SYSTEM WILL APPROACH FROM THE SOUTHWEST MID-MORNING TOMORROW PROVIDING A MIX-BAG OF PRECIPITATION TYPE. WARM AIR FLOWING IN FROM THE SOUTHWEST IN THE LOW-LEVELS WILL HELP TO SATURATE THE LOWER PORTION OF THE COLUMN AND PROVIDE ENOUGH LIFT FOR A LIGHT SNOW TO SPREAD ACROSS A MAJORITY OF OUR TERMINALS FROM PHL NORTH AND WEST. THIS WARMING TREND WILL CHANGE THE PRECIPITATION OVER TO A RAIN AND SLEET MIXTURE BY LATE MORNING AND THEN TO ALL RAIN BY THE MID-AFTERNOON HOURS. THERE COULD BE MORE OF AN FREEZING RAIN ISSUE AT TTN/RDG/ABE THROUGH THE LATE MORNING AND EARLY AFTERNOON HOURS TOMORROW DEPENDING ON HOW FAST THE WARM AIR AND MIX OUT AN LINGERING BELOW FREEZING SURFACE TEMPERATURES. THROUGHOUT THE ENTIRE EVENT TOMORROW CONDITIONS WILL BE DETERIORATING DOWN TO IFR, MAYBE LOWER, CLOSER TO THE END OF THE TAF CYCLE. THOUGH THE PRECIPITATION LOOKS TO CUT OFF LATE IN THE CYCLE THERE WILL STILL BE PLENTY OF WARM MOIST AIR IN PLACE TO KEEP A LOW STRATUS DECK IN PLACE FOR THE FORESEEABLE FUTURE. OUTLOOK... MONDAY NIGHT...MVFR POSSIBLY IFR. SOME FREEZING PRECIPITATION POSSIBLE NORTH. TUESDAY AND TUESDAY NIGHT...MAINLY MVFR, LOCALLY IFR IN DRIZZLE AND LOWER CIGS. CHANCE OF LLWS TUESDAY NIGHT. WEDNESDAY...MAINLY MVFR IN SHOWERS, VERY STRONG SOUTHWEST WINDS ARE POSSIBLE WITH GUSTS EXCEEDING 30 KTS. CHANCE OF LLWS EARLY. WEDNESDAY NIGHT...MAINLY IFR. SHIFTING STRONG SOUTHWEST TO NORTHWEST WINDS GUSTS COULD EXCEED 30 KTS. THURSDAY...CONDITIONS IMPROVING TO MAINLY VFR NORTHWEST WIND GUSTS OF 20 TO 30 KT POSSIBLE. && .MARINE... THE GRADIENT SUPPORT WEST TO NORTHWEST WINDS BETWEEN 10 AND 15 KNOTS OR MUCH OF THE DAY...DROPPING OF AS THE SURFACE RIDGE AXIS APPROACHES. THE SHORT PERIOD WIND WAVES DIMINISH AS WELL. AS THE SURFACE RIDGE AXIS GETS OFFSHORE...THE GRADIENT FLOW BACKS TO THE SOUTHWEST AND PERHAPS EVEN SOUTH BY DAYBREAK MONDAY. THE FLOW DOES NOT SUPPORT WINDS MUCH ABOVE 10 KNOTS...EVEN AS THE RETURN FLOW BECOMES ESTABLISHED. WINDS AND SEAS ARE EXPECTED TO REMAIN WELL BELOW SMALL CRAFT LIMITS TONIGHT. OUTLOOK... A ROUGHER TIME FOR THE AREA WATERS IS EXPECTED IN THE OUTLOOK PERIOD. MONDAY AND MONDAY NIGHT SHOULD HAVE WIND GUSTS JUST BELOW SMALL CRAFT ADVISORY CONDITIONS WITH THE GREATEST CONCERN ON THE OCEAN. WINDS AND SEAS ON TUESDAY DAY ARE EXPECTED TO BE FURTHER BELOW SMALL CRAFT ADVISORY CRITERIA. FOG MIGHT BE MORE OF AN ISSUE TUESDAY INTO TUESDAY NIGHT. THEN ON TUESDAY NIGHT THE SOUTHERLY FLOW WILL START INCREASING PRECEDING THE COLD FRONT. AS IS TYPICALLY THE CASE, WARM AIR OVER COLDER WATER WILL DAMPEN THE MIXING. SO TUESDAY NIGHT ON THE OCEAN, THE SWELLS MIGHT BE THE PHENOMENON THAT REACHES SMALL CRAFT ADVISORY CRITERIA. ON WEDNESDAY AND WEDNESDAY EVENING, A VERY STRONG LOW LEVEL JET IS FORECAST TO BE PASSING ACROSS THE AREA WATERS AND EVEN WITH THE WARMTH OF THE AIR MASS, THAT MIGHT BE TOO STRONG. WE HAVE WIND GUSTS OUTLOOKED TO REACH GALE FORCE. CONFIDENCE IS HIGHER ABOUT SMALL CRAFT ADVISORY CRITERIA BEING MET. WHILE THERE MAY BE A BIT OF A LULL IN THE WINDS ON WEDNESDAY NIGHT, THE SHOULD INCREASE AGAIN IN ALL LIKELIHOOD TO SMALL CRAFT ADVISORY CRITERIA AGAIN LATER WEDNESDAY NIGHT INTO THURSDAY. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS...GIGI NEAR TERM...HAYES/HEAVENER SHORT TERM...HAYES LONG TERM...GIGI AVIATION...GAINES/GIGI/HEAVENER MARINE...GIGI/HAYES
Hazardous weather outlook, Jan 27, 3:36 PM EST, 4 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 336 PM EST SUN JAN 27 2013 DEZ001-MDZ008-NJZ007>010-015-PAZ060>062-070-071-101>106-282045- NEW CASTLE-CECIL-WARREN-MORRIS-HUNTERDON-SOMERSET-MERCER-BERKS- LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER- EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS- LOWER BUCKS- 336 PM EST SUN JAN 27 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 2 PM EST MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. LOCALLY HEAVY RAIN AND STRONG GUSTY WINDS ARE POSSIBLE A COLD FRONT MOVES THROUGH THE AREA WEDNESDAY AND WEDNESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ002>004-MDZ012-015-019-020-NJZ012>014-016>027-282045- KENT-INLAND SUSSEX-DELAWARE BEACHES-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC- CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN- SOUTHEASTERN BURLINGTON- 336 PM EST SUN JAN 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. LOCALLY HEAVY RAIN AND VERY STRONG GUSTY WINDS ARE POSSIBLE WHEN A COLD FRONT MOVES THROUGH THE AREA WEDNESDAY AND WEDNESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NJZ001-PAZ054-055-282045- SUSSEX-CARBON-MONROE- 336 PM EST SUN JAN 27 2013 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 11 PM EST MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. LOCALLY HEAVY RAIN AND STRONG GUSTY WINDS ARE POSSIBLE WHEN A COLD FRONT MOVES THROUGH THE AREA WEDNESDAY AND WEDNESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-282045- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- 336 PM EST SUN JAN 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A CHANCE FOR GALE FORCE WIND GUSTS WEDNESDAY AND WEDNESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
Nearby
Winter Weather Advisories in New Jersey, 2013Winter Weather Advisories in Pennsylvania, 2013Winter Weather Advisories in Delaware, 2013Every winter weather advisory in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.