Alert archive / New Jersey / Frost Advisories in 2018
Frost Advisory 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 20, 2018, 3:35 PM EDT for 4 states. It took effect at Apr 21, 2018, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2018, 3:35 PM EDT (19:35 UTC)
- In effect from
- Apr 21, 2018, 2:00 AM EDT
- Expired
- Apr 21, 2018, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Bucks County, PA, Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 72 km from the middle of the area, began a volume at 19:34 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, 7.6 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
- 1459 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
953 WWUS71 KPHI 201935 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 335 PM EDT Fri Apr 20 2018 MDZ008-PAZ060-101-103-210745- /O.NEW.KPHI.FZ.W.0003.180421T0600Z-180421T1200Z/ Cecil-Berks-Western Chester-Western Montgomery- Including the cities of Elkton, Reading, Honey Brook, Oxford, Collegeville, and Pottstown 335 PM EDT Fri Apr 20 2018 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM EDT SATURDAY... The National Weather Service in Mount Holly has issued a Freeze Warning, which is in effect from 2 AM to 8 AM EDT Saturday. * TEMPERATURES...Lows 30 to 32 degrees early Saturday morning. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ DEZ001>003-MDZ012-015-020-NJZ012-013-015>022-027-PAZ102-104-106- 210745- /O.NEW.KPHI.FR.Y.0001.180421T0600Z-180421T1200Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Caroline- Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic- Southeastern Burlington-Eastern Chester-Eastern Montgomery- Lower Bucks- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Denton, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 335 PM EDT Fri Apr 20 2018 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT SATURDAY... The National Weather Service in Mount Holly has issued a Frost Advisory, which is in effect from 2 AM to 8 AM EDT Saturday. * TEMPERATURES...Lows in the mid 30s early Saturday morning will allow for frost to develop. * IMPACTS...Frost conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that widespread frost is expected. Sensitive outdoor plants may be killed if left uncovered. && $$
2 follow-up statements
427 WWUS71 KPHI 210634 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 234 AM EDT Sat Apr 21 2018 NJZ012-013-015-019-020-022-027-PAZ102-104-106-211200- /O.UPG.KPHI.FR.Y.0001.000000T0000Z-180421T1200Z/ /O.EXA.KPHI.FZ.W.0003.000000T0000Z-180421T1200Z/ Middlesex-Western Monmouth-Mercer-Northwestern Burlington-Ocean- Atlantic-Southeastern Burlington-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Hammonton, Wharton State Forest, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 234 AM EDT Sat Apr 21 2018 ...FREEZE WARNING IN EFFECT UNTIL 8 AM EDT THIS MORNING... The National Weather Service in Mount Holly has issued a Freeze Warning, which is in effect until 8 AM EDT this morning. The Frost Advisory is no longer in effect. * TEMPERATURES...In the lower 30s. Colder spots may reach the upper 20s. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ MDZ008-PAZ060-101-103-211200- /O.CON.KPHI.FZ.W.0003.000000T0000Z-180421T1200Z/ Cecil-Berks-Western Chester-Western Montgomery- Including the cities of Elkton, Reading, Honey Brook, Oxford, Collegeville, and Pottstown 234 AM EDT Sat Apr 21 2018 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * TEMPERATURES...In the lower 30s. Colder spots may reach the upper 20s. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ DEZ001>003-MDZ012-015-020-NJZ016>018-021-211200- /O.CON.KPHI.FR.Y.0001.000000T0000Z-180421T1200Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Caroline-Salem- Gloucester-Camden-Cumberland- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Denton, Pennsville, Glassboro, Camden, Cherry Hill, and Millville 234 AM EDT Sat Apr 21 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * TEMPERATURES...In the mid to upper 30s. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that widespread frost is expected. Sensitive outdoor plants may be killed if left uncovered. && $$ CMS
912 WWUS71 KPHI 211150 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 750 AM EDT Sat Apr 21 2018 MDZ008-NJZ012-013-015-019-020-022-027-PAZ060-101>104-106-211300- /O.EXP.KPHI.FZ.W.0003.000000T0000Z-180421T1200Z/ Cecil-Middlesex-Western Monmouth-Mercer-Northwestern Burlington- Ocean-Atlantic-Southeastern Burlington-Berks-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Elkton, New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 750 AM EDT Sat Apr 21 2018 ...FREEZE WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures are above freezing and will continue to rise through the morning, therefore the freeze warning will be allowed to expire. $$ DEZ001>003-MDZ012-015-020-NJZ016>018-021-211300- /O.EXP.KPHI.FR.Y.0001.000000T0000Z-180421T1200Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Caroline-Salem- Gloucester-Camden-Cumberland- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Denton, Pennsville, Glassboro, Camden, Cherry Hill, and Millville 750 AM EDT Sat Apr 21 2018 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures continue to rise this morning and therefore the frost advisory will be allowed to expire. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 3:35 PM EDT | Freeze Warning | PHI | Berks, Bucks, Chester, Montgomery | 16 hr |
Nearby
Frost Advisories in New Jersey, 2018Frost Advisories in Pennsylvania, 2018Frost Advisories in Delaware, 2018Every frost advisory in 2018
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.