Alert archive / Pennsylvania / Frost Advisories in 2020
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 16, 2020, 3:19 PM EDT for Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It took effect at Apr 17, 2020, 12:00 AM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 16, 2020, 3:19 PM EDT (19:19 UTC)
- In effect from
- Apr 17, 2020, 12:00 AM EDT
- Expired
- Apr 17, 2020, 9:00 AM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 19:19 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.3 hours before the alert went out and 199 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
- 1627 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
906 WWUS71 KPHI 161919 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 319 PM EDT Thu Apr 16 2020 DEZ002-003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015- 019>022-027-PAZ060>062-101>103-105-170830- /O.UPG.KPHI.FZ.A.0002.200417T0400Z-200417T1300Z/ /O.NEW.KPHI.FZ.W.0002.200417T0400Z-200417T1300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Northwestern Burlington-Ocean-Cumberland- Atlantic-Southeastern Burlington-Berks-Lehigh-Northampton- Western Chester-Eastern Chester-Western Montgomery-Upper Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 319 PM EDT Thu Apr 16 2020 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 27 degrees expected. * WHERE...Portions of central, northern, northwest and southern New Jersey, east central and southeast Pennsylvania, northeast Maryland and central and southern Delaware. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ016>018-023-PAZ104-106-170830- /O.NEW.KPHI.FZ.W.0002.200417T0400Z-200417T1300Z/ Salem-Gloucester-Camden-Cape May-Eastern Montgomery-Lower Bucks- Including the cities of Pennsville, Glassboro, Camden, Cherry Hill, Cape May Court House, Norristown, Lansdale, Morrisville, and Doylestown 319 PM EDT Thu Apr 16 2020 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...In New Jersey, Salem, Gloucester, Camden and Cape May. In Pennsylvania, Eastern Montgomery and Lower Bucks. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-PAZ070-071-170830- /O.NEW.KPHI.FR.Y.0002.200417T0400Z-200417T1300Z/ New Castle-Delaware-Philadelphia- Including the cities of Wilmington, Media, and Philadelphia 319 PM EDT Thu Apr 16 2020 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT FRIDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Pennsylvania, Delaware and Philadelphia. In Delaware, New Castle. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost could damage or kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
2 follow-up statements
004 WWUS71 KPHI 170116 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 916 PM EDT Thu Apr 16 2020 DEZ002-003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023- 027-PAZ060>062-101>106-171300- /O.CON.KPHI.FZ.W.0002.200417T0400Z-200417T1300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington-Berks-Lehigh-Northampton-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 916 PM EDT Thu Apr 16 2020 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Portions of central, northern and southern New Jersey, east central and southeast Pennsylvania, northeast Maryland and central and southern Delaware. * WHEN...Until 9 AM EDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-PAZ070-071-171300- /O.CON.KPHI.FR.Y.0002.200417T0400Z-200417T1300Z/ New Castle-Delaware-Philadelphia- Including the cities of Wilmington, Media, and Philadelphia 916 PM EDT Thu Apr 16 2020 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT FRIDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Pennsylvania, Delaware and Philadelphia. In Delaware, New Castle. * WHEN...Until 9 AM EDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
269 WWUS71 KPHI 171245 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 845 AM EDT Fri Apr 17 2020 DEZ002-003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023- 027-PAZ060>062-101>106-171345- /O.EXP.KPHI.FZ.W.0002.000000T0000Z-200417T1300Z/ Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline- Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington-Berks-Lehigh-Northampton-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Reading, Allentown, Bethlehem, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 845 AM EDT Fri Apr 17 2020 ...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures will continue to warm through today. The Freeze Warning will be allowed to expire at 9 am. $$ DEZ001-PAZ070-071-171345- /O.EXP.KPHI.FR.Y.0002.000000T0000Z-200417T1300Z/ New Castle-Delaware-Philadelphia- Including the cities of Wilmington, Media, and Philadelphia 845 AM EDT Fri Apr 17 2020 ...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures will continue to warm through today. The Frost Advisory will be allowed to expire at 9 am. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 3:19 PM EDT | Freeze Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 18 hr |
| Apr 16, 6:02 PM EDT | Special Weather Statement | PHI | Lehigh, Monroe, Northampton | 43 min |
| Apr 16, 7:20 PM EDT | Special Weather Statement | PHI | Monroe | 25 min |
Nearby
Frost Advisories in Pennsylvania, 2020Frost Advisories in Delaware, 2020Every frost advisory in 2020
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.