Alert archive / Pennsylvania / Winter Weather Advisories in 2021
Winter Weather Advisory 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter weather advisory at Feb 8, 2021, 3:00 PM EST for 6 counties in Pennsylvania; 5 counties in New Jersey. It took effect at Feb 9, 2021, 1:00 AM EST. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Feb 8, 2021, 3:00 PM EST (20:00 UTC)
- In effect from
- Feb 9, 2021, 1:00 AM EST
- Expired
- Feb 9, 2021, 2:53 PM EST
- In force
- 14 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 108 km from the middle of the area, began a volume at 19:59 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, 8.0 hours before the alert went out and 194 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
- 1127 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- -190 m²/s²
- 0-3 km storm-relative helicity
- -38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
460 WWUS41 KPHI 082000 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 300 PM EST Mon Feb 8 2021 NJZ001-PAZ054-055-091000- /O.NEW.KPHI.WW.Y.0005.210209T0600Z-210209T2200Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 300 PM EST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 5 PM EST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 4 inches. * WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and Monroe. * WHEN...From 1 AM to 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
4 follow-up statements
317 WWUS41 KPHI 090027 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 727 PM EST Mon Feb 8 2021 NJZ007-008-PAZ061-062-091100- /O.EXB.KPHI.WW.Y.0005.210209T0900Z-210209T2200Z/ Warren-Morris-Lehigh-Northampton- Including the cities of Washington, Morristown, Allentown, Bethlehem, and Easton 727 PM EST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 5 PM EST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. * WHERE...In New Jersey, Warren and Morris. In Pennsylvania, Lehigh and Northampton. * WHEN...From 4 AM to 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...Snow develops from west to east between about 4 AM and 6 AM Tuesday and continues through the morning, then tapers off during Tuesday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NJZ001-PAZ054-055-091100- /O.CON.KPHI.WW.Y.0005.210209T0600Z-210209T2200Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 727 PM EST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 5 PM EST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and Monroe. * WHEN...From 1 AM to 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...Snow develops from west to east between about 2 AM and 4 AM Tuesday and continues through the morning, then tapers off during the afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Gorse
228 WWUS41 KPHI 090751 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 251 AM EST Tue Feb 9 2021 NJZ009-010-PAZ060-105-092200- /O.EXA.KPHI.WW.Y.0005.210209T0900Z-210209T2200Z/ Hunterdon-Somerset-Berks-Upper Bucks- Including the cities of Flemington, Somerville, Reading, Chalfont, and Perkasie 251 AM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... * WHAT...Mixed precipitation expected. Total snow accumulations of up to two inches and ice accumulations of a light glaze. * WHERE...In New Jersey, Hunterdon and Somerset Counties. In Pennsylvania, Berks County and upper portions of Bucks County. * WHEN...Until 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...Snow develops from west to east between about 4 AM and 7 AM today. Snow may begin to mix with sleet and freezing rain near or after the morning rush. With cold surface temperatures, slick roads may develop quickly. Precipitation should taper off during the afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NJZ001-PAZ054-055-092200- /O.CON.KPHI.WW.Y.0005.000000T0000Z-210209T2200Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 251 AM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. Locally higher amounts up to 7 inches are possible in the higher terrain. * WHERE...In New Jersey, Sussex County. In Pennsylvania, Carbon and Monroe Counties. * WHEN...Until 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...Snow should develop and spread eastward quickly through the morning rush and continue through midday before tapering off this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NJZ007-008-PAZ061-062-092200- /O.CON.KPHI.WW.Y.0005.210209T0900Z-210209T2200Z/ Warren-Morris-Lehigh-Northampton- Including the cities of Washington, Morristown, Allentown, Bethlehem, and Easton 251 AM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. * WHERE...In New Jersey, Warren and Morris Counties. In Pennsylvania, Lehigh and Northampton Counties. * WHEN...Until 5 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...Snow should develop and spread eastward quickly through the morning rush and continue through midday before tapering off this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ CMS
105 WWUS41 KPHI 091502 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 1002 AM EST Tue Feb 9 2021 NJZ001-PAZ054-055-092200- /O.CON.KPHI.WW.Y.0005.000000T0000Z-210209T2200Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 1002 AM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of up to two inches. * WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and Monroe. * WHEN...Until 5 PM EST this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. * ADDITIONAL DETAILS...Periods of snow will continue through midday before tapering off from west to east this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NJZ007>010-PAZ060>062-105-092200- /O.CON.KPHI.WW.Y.0005.000000T0000Z-210209T2200Z/ Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Upper Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Chalfont, and Perkasie 1002 AM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... * WHAT...Mixed precipitation. Additional snow accumulations of up to one inch and ice accumulations of a light glaze. * WHERE...Portions of northern and northwest New Jersey and east central and southeast Pennsylvania. * WHEN...Until 5 PM EST this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. * ADDITIONAL DETAILS...Periods of light snow mixed at times with sleet, light freezing rain, or freezing drizzle will continue through midday before tapering off from west to east this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Fitzsimmons
639 WWUS41 KPHI 091953 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 253 PM EST Tue Feb 9 2021 NJZ001-007>010-PAZ054-055-060>062-105-092100- /O.CAN.KPHI.WW.Y.0005.000000T0000Z-210209T2200Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Upper Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Easton, Chalfont, and Perkasie 253 PM EST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow has moved out of the region and therefore the Winter Weather Advisory has been cancelled. $$
Nearby
Winter Weather Advisories in Pennsylvania, 2021Winter Weather Advisories in New Jersey, 2021Every winter weather advisory in 2021
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.