Alert archive / New Jersey / Freeze Warnings in 2018
Freeze Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this freeze warning at Apr 17, 2018, 2:36 PM EDT for 7 counties in New Jersey; 4 counties in Pennsylvania; Cecil County, Maryland. It took effect at Apr 18, 2018, 2:00 AM EDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 17, 2018, 2:36 PM EDT (18:36 UTC)
- In effect from
- Apr 18, 2018, 2:00 AM EDT
- Expired
- Apr 18, 2018, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Cecil County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 18:39 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, 6.6 hours before the alert went out and 214 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
- 1077 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
598 WWUS71 KPHI 171836 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 236 PM EDT Tue Apr 17 2018 MDZ008-NJZ016>022-027-PAZ060-101>104-106-181200- /O.NEW.KPHI.FZ.W.0001.180418T0600Z-180418T1200Z/ Cecil-Salem-Gloucester-Camden-Northwestern Burlington-Ocean- Cumberland-Atlantic-Southeastern Burlington-Berks-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of Elkton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 236 PM EDT Tue Apr 17 2018 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM EDT WEDNESDAY... The National Weather Service in Mount Holly has issued a Freeze Warning, which is in effect from 2 AM to 8 AM EDT Wednesday. * TEMPERATURES...Overnight lows are expected to drop to near or below freezing. * 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. && $$
2 follow-up statements
229 WWUS71 KPHI 180738 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 338 AM EDT Wed Apr 18 2018 NJZ016>022-027-180845- /O.CAN.KPHI.FZ.W.0001.000000T0000Z-180418T1200Z/ Salem-Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland- Atlantic-Southeastern Burlington- Including the cities of Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, and Wharton State Forest 338 AM EDT Wed Apr 18 2018 ...FREEZE WARNING IS CANCELLED... The National Weather Service in Mount Holly has cancelled the Freeze Warning for southern New Jersey. A west wind around 10 mph should keep temperatures from dropping to the freezing mark this morning. Lows in southern New Jersey should favor the middle and upper 30s. $$ MDZ008-PAZ060-101>104-106-181200- /O.CON.KPHI.FZ.W.0001.000000T0000Z-180418T1200Z/ Cecil-Berks-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Lower Bucks- Including the cities of Elkton, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 338 AM EDT Wed Apr 18 2018 ..FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * TEMPERATURES...Lows early this morning should be around 32 degrees. * IMPACTS...Freezing temperatures may damage sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... This Freeze Warning means that freezing temperatures are likely in parts of the warned area. The expected conditions may damage sensitive vegetation. && $$ Iovino
946 WWUS71 KPHI 181156 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 756 AM EDT Wed Apr 18 2018 MDZ008-PAZ060-101>104-106-181300- /O.EXP.KPHI.FZ.W.0001.000000T0000Z-180418T1200Z/ Cecil-Berks-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Lower Bucks- Including the cities of Elkton, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 756 AM EDT Wed Apr 18 2018 ...FREEZE WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures are at or above 32 degrees across the warned area and will continue to rise this morning. Therefore, the Freeze Warning will be allowed to expire at 8 AM. $$ Meola
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 9:35 PM EDT | River Flood Warning | PHI | Morris | 19 hr |
| Apr 16, 9:37 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 6 hr |
| Apr 16, 9:37 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 11 hr |
| Apr 17, 10:37 AM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 59 hr |
Nearby
Freeze Warnings in New Jersey, 2018Freeze Warnings in Pennsylvania, 2018Freeze Warnings in Maryland, 2018Every freeze warning 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.