Alert archive / New Jersey / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 40, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 27, 2010, 3:19 PM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Northampton County, Pennsylvania. It was in force for 41 min. 2 reports 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
- May 27, 2010, 3:19 PM EDT (19:19 UTC)
- Expired
- May 27, 2010, 4:00 PM EDT
- In force
- 41 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 19:19 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 |
|---|---|---|---|
| May 27, 3:40 PM EDT | HAIL 0.25 | Ferndale, PA | PEA TO SOME PENNY SIZE HAIL REPORTED IN FERNDALE. |
| May 27, 3:40 PM EDT | HAIL 0.75 | Ferndale, PA | PEA TO SOME PENNY SIZE HAIL REPORTED IN FERNDALE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 27, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.3 hours before the alert went out and 143 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
- 759 J/kg
- Mixed-layer CIN
- -227 J/kg
- Mixed-layer LCL
- 1358 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -74 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
485 WUUS51 KPHI 271919 SVRPHI NJC019-041-PAC017-095-272000- /O.NEW.KPHI.SV.W.0040.100527T1919Z-100527T2000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 319 PM EDT THU MAY 27 2010 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITY OF EASTON... WEST CENTRAL HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 400 PM EDT * AT 315 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR ALPHA...OR NEAR EASTON...AND MOVING SOUTH AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MILFORD AROUND 325 PM EDT... FERNDALE AND SPRINGTOWN AROUND 330 PM EDT... REVERE AND PLEASANT VALLEY AROUND 335 PM EDT... OTTSVILLE AROUND 340 PM EDT... BEDMINSTER AND PIPERSVILLE AROUND 345 PM EDT... DUBLIN AND PERKASIE AROUND 355 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT THURSDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4066 7502 4028 7505 4034 7538 4070 7528 TIME...MOT...LOC 1919Z 011DEG 24KT 4061 7518 $$ PO
2 follow-up statements
969
WWUS51 KPHI 271940
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
340 PM EDT THU MAY 27 2010
NJC019-041-PAC017-095-272000-
/O.CON.KPHI.SV.W.0040.000000T0000Z-100527T2000Z/
WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-
340 PM EDT THU MAY 27 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTH CENTRAL BUCKS...SOUTH CENTRAL NORTHAMPTON...EXTREME WEST
CENTRAL HUNTERDON AND EXTREME SOUTHWESTERN WARREN COUNTIES...
AT 336 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO GOLF BALL SIZE. THIS STORM WAS LOCATED NEAR
RIEGELSVILLE...OR 7 MILES SOUTH OF EASTON...MOVING SOUTHWEST AT 15
MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
FERNDALE AND REVERE BY 350 PM EDT...
SPRINGTOWN BY 355 PM EDT...
PLEASANT VALLEY...RICHLANDTOWN...6 MILES NORTHWEST OF OTTSVILLE AND
8 MILES NORTHWEST OF BEDMINSTER BY 400 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4070 7527 4069 7523 4061 7505 4038 7521
4044 7535 4067 7529
TIME...MOT...LOC 1941Z 030DEG 12KT 4058 7522
$$
PO456
WWUS51 KPHI 271956
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
356 PM EDT THU MAY 27 2010
NJC019-041-PAC017-095-272005-
/O.EXP.KPHI.SV.W.0040.000000T0000Z-100527T2000Z/
WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-
356 PM EDT THU MAY 27 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BUCKS...SOUTH
CENTRAL NORTHAMPTON...WEST CENTRAL HUNTERDON AND EXTREME SOUTHWESTERN
WARREN COUNTIES WILL EXPIRE AT 400 PM EDT...
THE THUNDERSTORM THAT EARLIER PRODUCED GOLFBALL SIZED HAIL IN
NORTHAMPTON COUNTY NEAR WILLIAMS TOWNSHIP HAS WEAKENED. IT CONTINUES
TO PRODUCE SMALL HAIL AND HEAVY RAINS ACROSS NORTHERN BUCKS COUNTY.
IT CONTINUES TO MOVE TO THE SOUTH AT AROUND 20 MPH.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4070 7527 4069 7523 4061 7505 4038 7521
4044 7535 4067 7529
TIME...MOT...LOC 1955Z 030DEG 12KT 4054 7525
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 4:05 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean | 19 hr |
| May 27, 1:55 PM EDT | Special Weather Statement | PHI | Warren | 65 min |
| May 27, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 60 min |
| May 27, 3:25 PM EDT | Small Craft Advisory for Hazardous Seas | PHI | 12 hr | |
| May 27, 3:36 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 54 min |
| May 27, 4:20 PM EDT | Special Weather Statement | PHI | Sussex | 55 min |
| May 27, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 54 min |
| May 27, 6:35 PM EDT | Special Weather Statement | PHI | Warren | 55 min |
| May 27, 7:40 PM EDT | Special Weather Statement | PHI | Mercer | 65 min |
| May 27, 2:30 PM EDT | Flash Flood Warning | PHI | Northampton | 33 min |
| May 27, 2:45 PM EDT | Special Weather Statement | PHI | Chester | 60 min |
| May 27, 4:53 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 52 min |
| May 27, 5:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 64 min |
| May 27, 5:44 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery | 61 min |
| May 27, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 37 min |
| May 27, 6:05 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 25 min |
| May 27, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh, Montgomery | 55 min |
| May 27, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 48 min |
| May 27, 7:25 PM EDT | Special Weather Statement | PHI | Montgomery | 65 min |
| May 27, 7:44 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 3 hr |
| May 27, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 34 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2010Severe Thunderstorm Warnings in Pennsylvania, 2010Every severe thunderstorm warning 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.