Alert archive / New Jersey / Red Flag Warnings in 2023
Red Flag Warning 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this red flag warning at Jun 6, 2023, 3:49 AM EDT for 16 counties in New Jersey; 10 counties in Pennsylvania. It took effect at Jun 6, 2023, 11:00 AM EDT. It was in force for 9 hr. 12 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 6, 2023, 3:49 AM EDT (07:49 UTC)
- In effect from
- Jun 6, 2023, 11:00 AM EDT
- Expired
- Jun 6, 2023, 8:00 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 26 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, 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), 61 km from the middle of the area, began a volume at 07:49 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 6, 3:08 PM EDT | HAIL 0.5 | 2 E Fleetwood, PA | Social media photo of hail up to 1/2 inch. |
| Jun 6, 3:45 PM EDT | TSTM WND DMG | Pottstown, PA | tree limbs and power lines down. |
| Jun 6, 3:45 PM EDT | TSTM WND GST 63 | Pottstown, PA | |
| Jun 6, 4:05 PM EDT | TSTM WND DMG | 1 Wnw Norristown, PA | Tree fell on wires at Haws Ave. and W. Oak St. |
| Jun 6, 4:05 PM EDT | TSTM WND GST 52 | King Of Prussia, PA | trees and wires down. |
| Jun 6, 4:05 PM EDT | HAIL 1.75 | King Of Prussia, PA | |
| Jun 6, 4:39 PM EDT | HAIL 0.7 | 1 N Woodlynne, NJ | Pea to dime sized hail reported. |
| Jun 6, 5:36 PM EDT | TSTM WND GST 44 | 4 Se Mystic Island, NJ | Tuckerton XTUK WeatherFlow site. |
| Jun 6, 5:39 PM EDT | TSTM WND GST 47 | 4 Se Mystic Island, NJ | Rutgers XRUT WeatherFlow site. |
| Jun 6, 5:41 PM EDT | HAIL 0.25 | 1 Nnw Robesonia, PA | Pea sized hail for approximately 15 minutes. |
| Jun 6, 6:20 PM EDT | HAIL 0.25 | 2 Wsw Lakewood Twp, NJ | |
| Jun 6, 6:45 PM EDT | TSTM WND GST 39 | 4 Ese Mystic Island, NJ | Tuckerton XTUK WeatherFlow site. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 7.8 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
- 13 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1601 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
453 WWUS81 KPHI 060749 RFWPHI URGENT - FIRE WEATHER MESSAGE National Weather Service Mount Holly NJ 349 AM EDT Tue Jun 6 2023 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED TODAY... .Low fuel moistures, low daytime relative humidity values, and breezy conditions will result in critical fire weather conditions into this afternoon and evening. Any fires that develop may quickly get out of control and become difficult to contain. There is also a chance of isolated dry thunderstorms, which could serve as an ignition source for fires today. NJZ001-007>010-012>027-PAZ054-055-060>062-070-071-101>106-070000- /O.UPG.KPHI.FW.A.0003.230606T1500Z-230607T0000Z/ /O.NEW.KPHI.FW.W.0006.230606T1500Z-230607T0000Z/ 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-Carbon-Monroe-Berks-Lehigh-Northampton- Delaware-Philadelphia-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- 349 AM EDT Tue Jun 6 2023 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHEASTERN PENNSYLVANIA, INCLUDING THE LEHIGH VALLEY AND POCONO PLATEAU, SOUTHERN AND CENTRAL NEW JERSEY, AND PORTIONS OF 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 11 AM this morning to 8 PM EDT this evening. The Fire Weather Watch is no longer in effect. * 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, Southeastern Burlington, Carbon, Monroe, Berks, Lehigh, Northampton, Delaware, Philadelphia, Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks. * TIMING...Tuesday morning through Tuesday evening. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 25 percent. * TEMPERATURES...In the mid 70s to low 80s. * IMPACTS...The combination of very dry conditions, low humidity, and gusty winds will result in favorable conditions for the rapid spread of fires on Tuesday. 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. && $$ Staarmann
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 5:46 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Ocean | 21 hr |
| Jun 6, 2:06 PM EDT | Special Weather Statement | PHI | Morris | 24 min |
| Jun 6, 2:37 PM EDT | Special Weather Statement | PHI | Monmouth | 23 min |
| Jun 6, 3:03 PM EDT | Special Weather Statement | PHI | Monmouth | 27 min |
| Jun 6, 4:21 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jun 6, 4:25 PM EDT | Special Weather Statement | PHI | Camden | 35 min |
| Jun 6, 4:57 PM EDT | Special Weather Statement | PHI | Monmouth | 33 min |
| Jun 6, 5:00 PM EDT | Special Weather Statement | PHI | Camden, Gloucester | 30 min |
| Jun 6, 5:08 PM EDT | Special Marine Warning | PHI | 37 min | |
| Jun 6, 5:20 PM EDT | Special Weather Statement | PHI | Cape May | 25 min |
| Jun 6, 5:22 PM EDT | Special Weather Statement | PHI | Gloucester | 23 min |
| Jun 6, 5:32 PM EDT | Special Weather Statement | PHI | Monmouth | 28 min |
| Jun 6, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester | 25 min |
| Jun 6, 5:36 PM EDT | Special Marine Warning | PHI | 39 min | |
| Jun 6, 5:36 PM EDT | Special Weather Statement | PHI | Atlantic | 24 min |
| Jun 6, 5:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jun 6, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic | 42 min |
| Jun 6, 5:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 6, 6:17 PM EDT | Special Weather Statement | PHI | Ocean | 28 min |
| Jun 6, 7:31 PM EDT | Special Weather Statement | PHI | Salem | 29 min |
| Jun 6, 2:15 PM EDT | Special Weather Statement | PHI | Northampton | 30 min |
| Jun 6, 2:28 PM EDT | Special Weather Statement | PHI | Berks | 32 min |
| Jun 6, 2:58 PM EDT | Special Weather Statement | PHI | Berks | 32 min |
| Jun 6, 3:45 PM EDT | Special Weather Statement | PHI | Montgomery | 30 min |
| Jun 6, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 35 min |
| Jun 6, 4:00 PM EDT | Special Weather Statement | PHI | Berks | 30 min |
| Jun 6, 4:06 PM EDT | Special Weather Statement | PHI | Berks | 24 min |
| Jun 6, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 36 min |
| Jun 6, 4:41 PM EDT | Special Weather Statement | PHI | Chester | 34 min |
| Jun 6, 4:46 PM EDT | Special Weather Statement | PHI | Delaware | 29 min |
| Jun 6, 5:05 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Jun 6, 5:45 PM EDT | Special Weather Statement | PHI | Berks | 30 min |
| Jun 6, 6:15 PM EDT | Special Weather Statement | PHI | Chester | 30 min |
| Jun 6, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jun 6, 7:39 PM EDT | Special Weather Statement | PHI | Chester | 36 min |
Nearby
Red Flag Warnings in New Jersey, 2023Red Flag Warnings in Pennsylvania, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.