Alert archive / Pennsylvania / Red Flag Warnings in 2024
Red Flag Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this red flag warning at Oct 31, 2024, 2:50 PM EDT for 7 counties in New Jersey; 10 counties in Pennsylvania. It took effect at Nov 1, 2024, 12:00 PM EDT. It was in force for 7 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
- Oct 31, 2024, 2:50 PM EDT (18:50 UTC)
- In effect from
- Nov 1, 2024, 12:00 PM EDT
- Expired
- Nov 1, 2024, 7:00 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 18:49 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, 6.8 hours before the alert went out and 196 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
- 1436 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
817 WWUS81 KPHI 311850 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 250 PM EDT Thu Oct 31 2024 NJZ001-007>010-012-015-010800- /O.NEW.KPHI.FW.W.0004.241101T1600Z-241101T2300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- 250 PM EDT Thu Oct 31 2024 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM EDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR CENTRAL AND NORTHERN 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 noon to 7 PM EDT Friday. * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex and Mercer. * TIMING...From noon to 7 PM EDT Friday. * WINDS...West 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 28 percent. * TEMPERATURES...In the mid to upper 70s. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. 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. && $$ PAZ054-055-060>062-070-071-101>106-010800- /O.NEW.KPHI.FW.A.0001.241101T1600Z-241101T2300Z/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- 250 PM EDT Thu Oct 31 2024 ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EASTERN AND SOUTHEASTERN PENNSYLVANIA... The National Weather Service in Mount Holly has issued a Fire Weather Watch for gusty winds and low relative humidity, which is in effect from Friday afternoon through Friday evening. * AFFECTED AREA...Carbon, Monroe, Berks, Lehigh, Northampton, Delaware, Philadelphia, Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks. * TIMING...From Friday afternoon through Friday evening. * WINDS...West 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 28 percent. * TEMPERATURES...In the mid to upper 70s. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur due to a combination of strong winds, low relative humidities, and dry fuels. Listen for later forecasts and possible Red Flag Warnings. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$ Staarmann
3 follow-up statements
219 WWUS81 KPHI 010740 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 340 AM EDT Fri Nov 1 2024 NJZ001-007>010-012-015-012300- /O.CON.KPHI.FW.W.0004.241101T1600Z-241101T2300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- 340 AM EDT Fri Nov 1 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR CENTRAL AND NORTHERN NEW JERSEY... * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex and Mercer. * TIMING...From noon today to 7 PM EDT this evening. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 27 percent. * TEMPERATURES...In the mid to upper 70s. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. 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. && $$ PAZ054-055-060>062-070-071-101>106-012300- /O.CON.KPHI.FW.A.0001.241101T1600Z-241101T2300Z/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- 340 AM EDT Fri Nov 1 2024 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EASTERN AND SOUTHEASTERN PENNSYLVANIA... * AFFECTED AREA...Carbon, Monroe, Berks, Lehigh, Northampton, Delaware, Philadelphia, Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks. * TIMING...From noon EDT today through this evening. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 27 percent. * TEMPERATURES...In the mid to upper 70s. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur due to a combination of strong winds, low relative humidities, and dry fuels. Listen for later forecasts and possible Red Flag Warnings. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$
315 WWUS81 KPHI 011318 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 918 AM EDT Fri Nov 1 2024 PAZ054-055-060>062-070-071-101>106-012300- /O.UPG.KPHI.FW.A.0001.241101T1600Z-241101T2300Z/ /O.EXA.KPHI.FW.W.0004.241101T1600Z-241101T2300Z/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- 918 AM EDT Fri Nov 1 2024 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHEASTERN PENNSYLVANIA AND THE SOUTHERN POCONOS... The National Weather Service in Mount Holly has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect until 7 PM EDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Carbon, Monroe, Berks, Lehigh, Northampton, Delaware, Philadelphia, Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks. * TIMING...Until 7 PM EDT this evening. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 27 percent. * TEMPERATURES...Up to 78. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. 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. && $$ NJZ001-007>010-012-015-012300- /O.CON.KPHI.FW.W.0004.241101T1600Z-241101T2300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- 918 AM EDT Fri Nov 1 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR CENTRAL AND NORTHERN NEW JERSEY... * AFFECTED AREA...Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex and Mercer. * TIMING...Until 7 PM EDT this evening. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 27 percent. * TEMPERATURES...Up to 77. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly due to a combination of strong winds, low relative humidity, and dry fuels. Any fires that develop may quickly get out of control and become difficult to contain. For more information about wildfire danger, burn restrictions, and wildfire prevention and education, please visit your state forestry or environmental protection website. && $$ Hoeflich
001 WWUS81 KPHI 012254 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 654 PM EDT Fri Nov 1 2024 NJZ001-007>010-012-015-020000- /O.EXP.KPHI.FW.W.0004.000000T0000Z-241101T2300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- 654 PM EDT Fri Nov 1 2024 ...RED FLAG WARNING WILL EXPIRE AT 7 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL AND NORTHERN NEW JERSEY... Winds are starting to diminish with relative humidity levels rising as temperatures cool after sunset. $$ PAZ054-055-060>062-070-071-101>106-020000- /O.EXP.KPHI.FW.W.0004.000000T0000Z-241101T2300Z/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- 654 PM EDT Fri Nov 1 2024 ...RED FLAG WARNING WILL EXPIRE AT 7 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EASTERN PENNSYLVANIA... Winds are starting to diminish with relative humidity levels rising as temperatures cool after sunset. $$ Fitzsimmons
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 3:15 AM EDT | Small Craft Advisory | PHI | 44 hr | |
| Oct 31, 2:50 PM EDT | Fire Weather Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 18 hr |
Nearby
Red Flag Warnings in Pennsylvania, 2024Red Flag Warnings in New Jersey, 2024Every red flag warning in 2024
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.