Alert archive / New Jersey / Winter Storm Watches in 2021
Winter Storm Watch 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter storm watch at Feb 5, 2021, 3:09 PM EST for 4 states. It took effect at Feb 7, 2021, 12:00 AM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 5, 2021, 3:09 PM EST (20:09 UTC)
- In effect from
- Feb 7, 2021, 12:00 AM EST
- Expired
- Feb 6, 2021, 3:23 AM EST
- In force
- Issued by
- NWS Philadelphia/Mount Holly
All 25 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 20:09 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.2 hours before the alert went out and 198 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
- 2016 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
705 WWUS41 KPHI 052009 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 309 PM EST Fri Feb 5 2021 NJZ009-PAZ101-103-105-060915- /O.NEW.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Flemington, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 309 PM EST Fri Feb 5 2021 ...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY AFTERNOON... * WHAT...Heavy snow possible. Total snow accumulations of over 5 inches possible. * WHERE...In New Jersey, Hunterdon. In Pennsylvania, Western Chester, Western Montgomery and Upper Bucks. * WHEN...From late Saturday night through Sunday afternoon. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow will move in overnight Saturday night from southwest to northeast and may fall heavy for a time into Sunday morning before winding down from west to east by the mid to late afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ DEZ001-MDZ012-NJZ010-012-015>019-PAZ070-071-102-104-106-060915- /O.NEW.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ New Castle-Kent MD-Somerset-Middlesex-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Delaware-Philadelphia- Eastern Chester-Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Chestertown, Somerville, New Brunswick, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 309 PM EST Fri Feb 5 2021 ...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY AFTERNOON... * WHAT...Heavy snow possible. Total snow accumulations of over 5 inches possible. * WHERE...Portions of central, northern and southern New Jersey, southeast Pennsylvania, northeast Maryland and northern Delaware. * WHEN...From late Saturday night through Sunday afternoon. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow will move in overnight Saturday night from southwest to northeast and may fall heavy for a time into Sunday morning before winding down from west to east by the mid to late afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ DEZ002-003-MDZ015-019-020-NJZ013-014-020>023-026-027-060915- /O.NEW.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ Kent-Inland Sussex-Queen Annes-Talbot-Caroline-Western Monmouth- Eastern Monmouth-Ocean-Cumberland-Atlantic-Cape May-Coastal Ocean- Southeastern Burlington- Including the cities of Dover, Georgetown, Centreville, Easton, Denton, Freehold, Sandy Hook, Jackson, Millville, Hammonton, Cape May Court House, Long Beach Island, and Wharton State Forest 309 PM EST Fri Feb 5 2021 ...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY AFTERNOON... * WHAT...Heavy mixed precipitation possible. Total snow and sleet accumulations of over 5 inches possible. * WHERE...Portions of central and southern New Jersey, northeast Maryland and central and southern Delaware. * WHEN...From late Saturday night through Sunday afternoon. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow will move in overnight Saturday night and may start as rain in places before changing over to snow. Snow may fall heavy at times Sunday morning while mixing back over with sleet and rain at times, especially near the coast, which could lower amounts here. Precipitation will taper off from west to east in the mid to late afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ Fitzsimmons
1 follow-up statement
790 WWUS41 KPHI 060823 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 323 AM EST Sat Feb 6 2021 NJZ026-060930- /O.CAN.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ Coastal Ocean- Including the city of Long Beach Island 323 AM EST Sat Feb 6 2021 ...WINTER STORM WATCH IS CANCELLED... Snowfall amounts are expected to remain under 2 inches over coastal Ocean county. However, some minor accumulations will be possible on Sunday as snow mixes with rain. $$ DEZ001-MDZ012-NJZ009-010-012-013-015>019-PAZ070-071-101-102-104- 106-062130- /O.UPG.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ /O.NEW.KPHI.WS.W.0002.210207T0900Z-210208T0000Z/ New Castle-Kent MD-Hunterdon-Somerset-Middlesex-Western Monmouth- Mercer-Salem-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Western Chester-Eastern Chester-Eastern Montgomery- Lower Bucks- Including the cities of Wilmington, Chestertown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 323 AM EST Sat Feb 6 2021 ...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 7 inches * WHERE...Portions of central, northern, northwest and southern New Jersey, southeast Pennsylvania, northeast Maryland and northern Delaware. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Travel could be very difficult particularly late Sunday morning and early Sunday afternoon. * ADDITIONAL DETAILS... A heavy band of snowfall will overspread the area Sunday morning, with snow continuing into Sunday afternoon. Snowfall rates of 2 in/hr will be possible within this heavy band, and isolated snowfall totals in excess of 7 inches will be possible. Snowfall will clear the area from SW-NE Sunday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ NJZ008-062130- /O.NEW.KPHI.WS.W.0002.210207T0900Z-210208T0000Z/ Morris- Including the city of Morristown 323 AM EST Sat Feb 6 2021 ...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 7 inches. * WHERE...Morris. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Travel could be very difficult particularly late Sunday morning and early Sunday afternoon. * ADDITIONAL DETAILS...A heavy band of snowfall will overspread the area late Sunday morning, with snow continuing into Sunday afternoon. Snowfall rates of 2 in/hr will be possible within this heavy band. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ PAZ103-105-062130- /O.UPG.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ /O.NEW.KPHI.WW.Y.0004.210207T0900Z-210208T0000Z/ Western Montgomery-Upper Bucks- Including the cities of Collegeville, Pottstown, Chalfont, and Perkasie 323 AM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...Western Montgomery and Upper Bucks. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...A heavy band of snowfall will overspread the area Sunday morning, with snow continuing into Sunday afternoon. Snowfall rates of 1-2 in/hr will be possible within this heavy band. Snowfall will clear the area from SW-NE Sunday 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. && $$ DEZ002-MDZ015-019-020-NJZ014-020>022-027-062130- /O.UPG.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ /O.NEW.KPHI.WW.Y.0004.210207T0900Z-210208T0000Z/ Kent-Queen Annes-Talbot-Caroline-Eastern Monmouth-Ocean- Cumberland-Atlantic-Southeastern Burlington- Including the cities of Dover, Centreville, Easton, Denton, Sandy Hook, Jackson, Millville, Hammonton, and Wharton State Forest 323 AM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Wet snow expected. Total snow accumulations of up to 4 inches. * WHERE...Portions of central and southern New Jersey, northeast Maryland and central Delaware. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Travel could be dangerous on Sunday morning into early Sunday afternoon. * ADDITIONAL DETAILS...Snow, at times heavy, will overspread the area on Sunday morning, with snow potentially mixing with rain at times particulalry near the coast. Snow is expected to clear out from SW-NE Sunday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ DEZ003-NJZ023-062130- /O.UPG.KPHI.WS.A.0003.210207T0500Z-210207T2100Z/ /O.NEW.KPHI.WW.Y.0004.210207T0900Z-210208T0000Z/ Inland Sussex-Cape May- Including the cities of Georgetown and Cape May Court House 323 AM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Mixed precipitation expected. Total snow accumulations of up to two inches and ice accumulations of a light glaze. * WHERE...In New Jersey, Cape May. In Delaware, Inland Sussex. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Snow mixed with rain and possibly some sleet is expected on Sunday. 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. && $$ NJZ001-007-PAZ054-055-060>062-062130- /O.NEW.KPHI.WW.Y.0004.210207T0900Z-210208T0000Z/ Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton- Including the cities of Newton, Washington, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, and Easton 323 AM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...Portions of northern New Jersey and east central and northeast Pennsylvania. * WHEN...From 4 AM to 7 PM EST Sunday. * IMPACTS...Travel could be difficult Sunday morning through early Sunday afternoon. * ADDITIONAL DETAILS...A heavy band of snowfall will overspread the area Sunday morning, with snow continuing into Sunday afternoon. Snowfall rates of 1-2 in/hr will be possible within this heavy band. Snowfall will clear the area from SW-NE Sunday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 5, 3:14 PM EST | Gale Watch | PHI | 24 hr |
Nearby
Winter Storm Watches in New Jersey, 2021Winter Storm Watches in Pennsylvania, 2021Winter Storm Watches in Maryland, 2021Every winter storm watch 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.