Alert archive / New Jersey / Red Flag Warnings in 2023
Red Flag Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this red flag warning at Mar 18, 2023, 7:34 PM EDT for 16 counties in New Jersey. It took effect at Mar 19, 2023, 10:00 AM EDT. It was in force for 10 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
- Mar 18, 2023, 7:34 PM EDT (23:34 UTC)
- In effect from
- Mar 19, 2023, 10:00 AM EDT
- Expired
- Mar 19, 2023, 8:00 PM EDT
- In force
- 10 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties 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, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 34 km from the middle of the area, began a volume at 23:39 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
Brookhaven, NY (KOKX), launched 12:00Z, 11.6 hours before the alert went out and 180 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
- 758 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- -127 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
988 WWUS81 KPHI 182334 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 734 PM EDT Sat Mar 18 2023 ...Gusty winds and low humidity expected Sunday... .Very dry air and gusty winds behind a cold front, combined with dry fuels, will result in conditions ripe for explosive fire growth on Sunday. NJZ001-007>010-012>027-191215- /O.NEW.KPHI.FW.W.0001.230319T1400Z-230320T0000Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 734 PM EDT Sat Mar 18 2023 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM EDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTHWESTERN, CENTRAL AND SOUTHERN NEW JERSEY... The National Weather Service in Mount Holly has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 10 AM to 8 PM EDT Sunday. * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex, Western Monmouth, Eastern Monmouth, Mercer, Salem, Gloucester, Camden, Northwestern Burlington, Ocean, Cumberland, Atlantic, Cape May, Atlantic Coastal Cape May, Coastal Atlantic, Coastal Ocean and Southeastern Burlington. * TIMING...Late morning through early evening Sunday. * WINDS...West 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...25 to 30 percent. * TEMPERATURES...In the mid 30s to low 40s. * IMPACTS...Low humidity and gusty winds will result in conditions which may result in explosive wildfire growth. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly due to a combination of strong winds, low relative humidity, and dry fuels. Any fires that develop may quickly get out of control and become difficult to contain. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$
4 follow-up statements
916 WWUS81 KPHI 190745 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 345 AM EDT Sun Mar 19 2023 ...Gusty Winds and Low Humidity For Today Combining with Dry Fine Fuels... .In the wake of a dry cold front, low humidity and gusty west- northwest winds will combine with dry fuels, resulting in critical fire weather conditions, especially this afternoon. Winds will relax tonight into Monday, but humidity will remain low. NJZ001-007>010-012>027-192000- /O.CON.KPHI.FW.W.0001.230319T1400Z-230320T0000Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 345 AM EDT Sun Mar 19 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR MUCH OF NORTHWEST, CENTRAL AND SOUTHERN NEW JERSEY... * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex, Western Monmouth, Eastern Monmouth, Mercer, Salem, Gloucester, Camden, Northwestern Burlington, Ocean, Cumberland, Atlantic, Cape May, Atlantic Coastal Cape May, Coastal Atlantic, Coastal Ocean and Southeastern Burlington. * TIMING...10 AM to 8 PM Today. * WINDS...West-northwest 12 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...Recoveries only 40 to 50 percent early this morning, with minimum humidity 20 to 25 percent this afternoon. * TEMPERATURES...Mid 30s to mid 40s. * IMPACTS...Critical fire weather conditions could cause rapid wildfire growth and spread if ignition occurs. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly due to a combination of strong winds, low relative humidity, and dry fuels. Any fires that develop may quickly get out of control and become difficult to contain. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$
336 WWUS81 KPHI 191634 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 1234 PM EDT Sun Mar 19 2023 ...Gusty Winds and Low Humidity For Today Combining with Dry Fine Fuels... .In the wake of a dry cold front, low humidity and gusty west- northwest winds will combine with dry fuels, resulting in critical fire weather conditions, especially this afternoon. Winds will relax tonight into Monday, but humidity will remain low. NJZ001-007>010-012>027-200000- /O.CON.KPHI.FW.W.0001.000000T0000Z-230320T0000Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 1234 PM EDT Sun Mar 19 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NEW JERSEY... * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex, Western Monmouth, Eastern Monmouth, Mercer, Salem, Gloucester, Camden, Northwestern Burlington, Ocean, Cumberland, Atlantic, Cape May, Atlantic Coastal Cape May, Coastal Atlantic, Coastal Ocean and Southeastern Burlington. * TIMING...Until 8 PM Today. * WINDS...West 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 21 percent. * TEMPERATURES...Mid 30s to low 40s. * IMPACTS...Critical fire weather conditions could cause rapid wildfire growth and spread if ignition occurs. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly due to a combination of strong winds, low relative humidity, and dry fuels. Any fires that develop may quickly get out of control and become difficult to contain. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$
531 WWUS81 KPHI 191916 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 316 PM EDT Sun Mar 19 2023 NJZ001-007>010-012>027-200000- /O.CON.KPHI.FW.W.0001.000000T0000Z-230320T0000Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 316 PM EDT Sun Mar 19 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR MOST OF NORTHERN AND SOUTHERN NEW JERSEY... * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex, Western Monmouth, Eastern Monmouth, Mercer, Salem, Gloucester, Camden, Northwestern Burlington, Ocean, Cumberland, Atlantic, Cape May, Atlantic Coastal Cape May, Coastal Atlantic, Coastal Ocean and Southeastern Burlington. * TIMING...Until 8 PM this evening. * WINDS...West 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 24 percent. * TEMPERATURES...In the upper 30s. * IMPACTS...Critical fire weather conditions could cause rapid wildfire growth and spread if ignition occurs. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly due to a combination of strong winds, low relative humidity, and dry fuels. Any fires that develop may quickly get out of control and become difficult to contain. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$ MPS
758 WWUS81 KPHI 192340 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 740 PM EDT Sun Mar 19 2023 NJZ001-007>010-012>027-200045- /O.EXP.KPHI.FW.W.0001.000000T0000Z-230320T0000Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 740 PM EDT Sun Mar 19 2023 ...RED FLAG WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING... Winds have diminished this evening and relative humidity values will increase overnight. Therefore, the Red Flag Warning will be allowed to expire. $$ Brudy
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 6:47 AM EDT | Small Craft Advisory | PHI | 39 hr |
Nearby
Red Flag Warnings in New Jersey, 2023Every red flag warning in 2023
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.