Alert archive / Pennsylvania / Red Flag Warnings in 2008
Red Flag Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this red flag warning at Apr 19, 2008, 5:43 PM EDT for 7 counties in Pennsylvania. It was in force for 2 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, 2008, 5:43 PM EDT (21:43 UTC)
- Expired
- Apr 19, 2008, 8:06 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties 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), 112 km from the middle of the area, began a volume at 21:43 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, 9.7 hours before the alert went out and 224 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
- 2113 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 49 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 192143 RFWPHI RED FLAG WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 543 PM EDT SAT APR 19 2008 ...RED FLAG WARNING IN EFFECT FOR ALL OF PENNSYLVANIAS SOUTHEAST COUNTIES UNTIL MIDNIGHT TONIGHT... ..VERY WARM AIR COMBINED WITH LOW HUMIDITY...VERY LOW FINE FUEL MOISTURE AND INCREASED SURFACE WINDS...HAS INCREASED FAVORABLE CONDITIONS FOR RAPID FIRE DEVELOPMENT AND SPREAD THROUGH THIS EVENING. PAZ054-055-060>062-067>071-200400- /O.NEW.KPHI.FW.W.0001.080419T2143Z-080420T0400Z/ CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- 543 PM EDT SAT APR 19 2008 ...RED FLAG WARNING IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT. WARM AND DRY CONDITIONS THE PAST SEVERAL DAYS IS NOW AIDED BY GUSTY SURFACE WINDS AND HAS INCREASED THE SPREAD OF WILD FIRES THAT MAY BEGIN. THIS WILL BE A CONDITION THAT WILL LAST FOR THE NEXT SEVERAL HOURS...THEN THE HUMIDITY AND WINDS WILL FALL BELOW THE NECESSARY CRITERIA. 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. $$ OHARA/EBERWINE
1 follow-up statement
000 WWUS81 KPHI 200006 RFWPHI RED FLAG WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 806 PM EDT SAT APR 19 2008 PAZ054-055-060>062-067>071-200115- /O.CAN.KPHI.FW.W.0001.000000T0000Z-080420T0400Z/ CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- 806 PM EDT SAT APR 19 2008 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE RED FLAG WARNING. WINDS HAVE DIMINISHED BELOW 15 MPH AND HUMIDITIES HAVE INCREASED ABOVE 30 PERCENT. $$
Nearby
Red Flag Warnings in Pennsylvania, 2008Every red flag warning in 2008
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.