Alert archive / Pennsylvania / Tornado Warnings in 2010
Tornado Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 22, 2010, 3:44 PM EDT for Delaware County, Philadelphia County, Pennsylvania; Gloucester County, New Jersey. It was in force for 31 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 22, 2010, 3:44 PM EDT (19:44 UTC)
- Expired
- Aug 22, 2010, 4:15 PM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 19:45 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 |
|---|---|---|---|
| Aug 22, 3:45 PM EDT | TORNADO | Chester, PA | EF-0 TORNADO CONFIRMED WITH MAXIMUM WINDS OF 75 MPH IN THE CITY OF CHESTER. PATH LENGTH WAS 0.30 MILES AND MAXIMUM WIDTH WAS 80 YARDS. NO INJURIES REPORTED. NO FATALITIES REPORTED. NUMEROUS TREES WERE FALLEN ALONG THE PATH OF THE TORNADO. THERE WAS ALSO ROOF A |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.7 hours before the alert went out and 209 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
- 796 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
188 WFUS51 KPHI 221944 TORPHI NJC015-PAC045-101-222015- /O.NEW.KPHI.TO.W.0008.100822T1944Z-100822T2015Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 344 PM EDT SUN AUG 22 2010 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA... SOUTHWESTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY... * UNTIL 415 PM EDT * AT 343 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CHESTER... OR 12 MILES NORTHEAST OF WILMINGTON...MOVING NORTHEAST AT 15 MPH. * THE TORNADO WILL BE NEAR... NETHER PROVIDENCE TOWNSHIP BY 350 PM EDT... GIBBSTOWN AND SWARTHMORE BY 400 PM EDT... FOLCROFT AND PAULSBORO BY 410 PM EDT... PHILADELPHIA INTERNATIONAL AIRPORT...SOUTH PHILADELPHIA...YEADON AND NATIONAL PARK BY 415 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3998 7524 3986 7513 3976 7536 3985 7546 TIME...MOT...LOC 1944Z 241DEG 10KT 3984 7536 $$ HAYES
2 follow-up statements
648 WWUS51 KPHI 221954 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 354 PM EDT SUN AUG 22 2010 NJC015-PAC045-101-222015- /O.CON.KPHI.TO.W.0008.000000T0000Z-100822T2015Z/ GLOUCESTER NJ-DELAWARE PA-PHILADELPHIA PA- 354 PM EDT SUN AUG 22 2010 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR SOUTHWESTERN PHILADELPHIA...SOUTHEASTERN DELAWARE AND NORTHWESTERN GLOUCESTER COUNTIES... AT 350 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR EDDYSTONE...OR 13 MILES NORTHEAST OF WILMINGTON...MOVING NORTHEAST AT 15 MPH. THE TORNADO WILL BE NEAR... RIDLEY PARK...FOLSOM...GIBBSTOWN AND SWARTHMORE BY 400 PM EDT... NORWOOD...PROSPECT PARK...RUTLEDGE AND MORTON BY 405 PM EDT... FOLCROFT AND GLENOLDEN BY 410 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3998 7524 3986 7513 3976 7536 3985 7546 TIME...MOT...LOC 1954Z 241DEG 10KT 3985 7533 $$ HAYES
444 WWUS51 KPHI 222014 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 414 PM EDT SUN AUG 22 2010 NJC015-PAC045-101-222024- /O.EXP.KPHI.TO.W.0008.000000T0000Z-100822T2015Z/ GLOUCESTER NJ-DELAWARE PA-PHILADELPHIA PA- 414 PM EDT SUN AUG 22 2010 ...THE TORNADO WARNING FOR SOUTHWESTERN PHILADELPHIA...SOUTHEASTERN DELAWARE AND NORTHWESTERN GLOUCESTER COUNTIES WILL EXPIRE AT 415 PM EDT... THE STORM THAT PROMPTED THE TORNADO WARNING HAS WEAKENED TO THE POINT WHERE IS IT NOT LONGER CONSIDERED A THREAT TO PRODUCE A TORNADO. LAT...LON 3998 7524 3986 7513 3976 7536 3985 7546 TIME...MOT...LOC 2014Z 241DEG 10KT 3988 7527 $$ HAYES
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 1:00 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 60 min |
| Aug 22, 2:02 PM EDT | Special Weather Statement | PHI | Delaware | 58 min |
| Aug 22, 2:56 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery, Philadelphia | 64 min |
| Aug 22, 3:11 PM EDT | Areal Flood Advisory | PHI | Delaware | 2 hr |
| Aug 22, 3:18 PM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 57 min |
| Aug 22, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 65 min |
| Aug 22, 4:07 PM EDT | Areal Flood Advisory | PHI | Philadelphia | 113 min |
| Aug 22, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 65 min |
| Aug 22, 6:30 PM EDT | Special Weather Statement | PHI | Bucks | 60 min |
| Aug 22, 12:23 PM EDT | Special Weather Statement | PHI | Ocean | 22 min |
| Aug 22, 12:42 PM EDT | Special Weather Statement | PHI | Ocean | 48 min |
| Aug 22, 1:09 PM EDT | Special Weather Statement | PHI | Atlantic | 66 min |
| Aug 22, 1:12 PM EDT | Special Weather Statement | PHI | Monmouth | 63 min |
| Aug 22, 1:14 PM EDT | Special Weather Statement | PHI | Morris, Somerset | 61 min |
| Aug 22, 1:30 PM EDT | Special Weather Statement | PHI | Monmouth | 60 min |
| Aug 22, 1:57 PM EDT | Special Weather Statement | PHI | Morris | 63 min |
| Aug 22, 2:00 PM EDT | Special Weather Statement | PHI | Monmouth | 60 min |
| Aug 22, 2:21 PM EDT | Special Marine Warning | PHI | 54 min | |
| Aug 22, 2:25 PM EDT | Special Weather Statement | PHI | Morris | 35 min |
| Aug 22, 2:32 PM EDT | Special Weather Statement | PHI | Salem | 58 min |
| Aug 22, 3:29 PM EDT | Special Weather Statement | PHI | Salem | 61 min |
| Aug 22, 4:31 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 59 min |
| Aug 22, 4:39 PM EDT | Special Weather Statement | PHI | Somerset | 66 min |
| Aug 22, 5:04 PM EDT | Special Weather Statement | PHI | Salem | 56 min |
| Aug 22, 5:14 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 2 hr |
| Aug 22, 5:18 PM EDT | Special Weather Statement | PHI | Middlesex, Morris | 57 min |
| Aug 22, 5:31 PM EDT | Special Weather Statement | PHI | Camden | 59 min |
| Aug 22, 5:43 PM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 2 hr |
| Aug 22, 7:13 PM EDT | Special Weather Statement | PHI | Burlington, Camden | 62 min |
| Aug 22, 7:23 PM EDT | Special Weather Statement | PHI | Burlington, Monmouth, Ocean | 67 min |
Nearby
Tornado Warnings in Pennsylvania, 2010Tornado Warnings in New Jersey, 2010Every tornado warning in 2010Tornadoes in 2010
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.