Alert archive / Pennsylvania / Red Flag Warnings in 2006
Red Flag Warning 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this red flag warning at Apr 19, 2006, 3:56 AM EDT for 7 counties in Pennsylvania; 7 counties in New Jersey. It took effect at Apr 19, 2006, 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
- Apr 19, 2006, 3:56 AM EDT (07:56 UTC)
- In effect from
- Apr 19, 2006, 12:00 PM EDT
- Expired
- Apr 19, 2006, 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, Carbon County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 93 km from the middle of the area, began a volume at 08:00 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 00:00Z, 7.9 hours before the alert went out and 190 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
- 2373 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -58 m²/s²
- 0-3 km storm-relative helicity
- -129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS81 KPHI 190756 RFWPHI RED FLAG WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 356 AM EDT WED APR 19 2006 NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-191600- /O.NEW.KPHI.FW.W.0009.060419T1600Z-060419T2300Z/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON- MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- 356 AM EDT WED APR 19 2006 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING. A DRY AND BREEZY DAY IS EXPECTED TODAY. HUMIDITY LEVELS WILL FALL TO 30% OR BELOW DURING THE AFTERNOON. NORTH TO NORTHWEST WINDS WILL INCREASE TO 15 TO 20 MPH...WITH HIGHER GUSTS POSSIBLE...ESPECIALLY OVER THE HIGHER TERRAIN. THESE ATMOSPHERIC CONDITIONS....COMBINED WITH VERY LOW FUEL MOISTURE LEVELS...WILL LEAD TO HIGH FIRE GROWTH POTENTIAL. A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED TO OCCUR. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITIES...AND DRY FUELS WILL CREATE AN ENVIRONMENT FOR SIGNIFICANT FIRE GROWTH. $$ RPW/ROBERTSON
2 follow-up statements
000 WWUS81 KPHI 191421 RFWPHI RED FLAG WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1021 AM EDT WED APR 19 2006 NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-192300- /O.CON.KPHI.FW.W.0009.060419T1600Z-060419T2300Z/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON- MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- 1021 AM EDT WED APR 19 2006 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CONTINUED THE RED FLAG WARNING UNTIL 7 PM EDT THIS EVENING. DRY AND BREEZY CONDITIONS EXPECTED TODAY. HUMIDITY LEVELS WILL FALL TO 30% OR BELOW THIS AFTERNOON. NORTH TO NORTHWEST WINDS WILL RANGE BETWEEN 15 AND 20 MPH...WITH HIGHER GUSTS POSSIBLE... ESPECIALLY OVER THE HIGHER TERRAIN. THESE ATMOSPHERIC CONDITIONS....COMBINED WITH VERY LOW FUEL MOISTURE LEVELS...WILL LEAD TO HIGH FIRE GROWTH POTENTIAL. AT 10 AM...THE WINDS WERE FROM THE NORTH NORTHWEST AT 10 TO 15 MPH AND THE RELATIVE HUMIDITY AROUND 40%...AS THE WINDS INCREASE THE RELATIVE HUMIDITY WILL CONTINUE TO DROP AS THE TEMPERATURES RISE INTO THE 70S. A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED TO OCCUR. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITIES...AND DRY FUELS WILL CREATE AN ENVIRONMENT FOR SIGNIFICANT FIRE GROWTH. $$ EBERWINE
000 WWUS81 KPHI 192245 RFWPHI RED FLAG WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 645 PM EDT WED APR 19 2006 NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-192345- /O.EXP.KPHI.FW.W.0009.000000T0000Z-060419T2300Z/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON- MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- 645 PM EDT WED APR 19 2006 ...RED FLAG WARNING WILL EXPIRE AT 7 PM EDT THIS EVENING... THE RED FLAG WARNING FOR EAST-CENTRAL AND SOUTHEASTERN PENNSYLVANIA, AS WELL AS NORTHWESTERN AND PARTS OF CENTRAL NEW JERSEY, WILL EXPIRE AT 7 PM EDT THIS EVENING. RELATIVE HUMIDITY LEVELS DROPPED BELOW 30 PERCENT AT SEVERAL LOCATIONS IN EASTERN PENNSYLVANIA AS WELL AS NORTHWESTERN AND CENTRAL NEW JERSEY THIS AFTERNOON. MINIMUM RELATIVE HUMIDITIES ARE ONCE AGAIN EXPECTED TO DROP TO 30 PERCENT OR LESS THURSDAY AFTERNOON, AND FUELS WILL REMAIN VERY DRY, WITH 10 PERCENT MOISTURE CONTENT OR LESS. HOWEVER, SUSTAINED WIND SPEEDS ARE FORECAST TO BE LESS THAN TODAYS WINDS AND REMAIN UNDER 15 MILES AN HOUR FOR THURSDAY. EVEN SO, THE COMBINATION OF DRY FUELS AND LOW RELATIVE HUMIDITIES WILL STILL GENERATE CONDITIONS THAT COULD SUPPORT SIGNIFICANT FIRE GROWTH DURING THE MID TO LATE AFTERNOON HOURS THURSDAY. PLEASE BE VERY CAREFUL IF YOU ARE OUTSIDE WITH ANYTHING THAT COULD START A FIRE. $$
Nearby
Red Flag Warnings in Pennsylvania, 2006Red Flag Warnings in New Jersey, 2006Every red flag warning in 2006
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.