Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 39, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 27, 2010, 2:00 PM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Monroe County, Northampton County, Pennsylvania. It was in force for 60 min. 3 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, 2:00 PM EDT (18:00 UTC)
- Expired
- May 27, 2010, 3:00 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 18:02 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, 2:20 PM EDT | TSTM WND DMG | Roseto, PA | HIGH WIND AND SOME HAIL REPORTED WITH TREES DOWN IN ROSETO. |
| May 27, 2:25 PM EDT | HAIL 0.25 | Stroudsburg, PA | PEA SIZE HAIL REPORTED IN STROUDSBURG. |
| May 27, 2:26 PM EDT | HAIL 0.5 | Bangor, PA | PEA TO MARBLE SIZE HAIL REPORTED IN BANGOR. |
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, 6.0 hours before the alert went out and 164 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.
813 WUUS51 KPHI 271800 SVRPHI NJC019-041-PAC017-089-095-271900- /O.NEW.KPHI.SV.W.0039.100527T1800Z-100527T1900Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 200 PM EDT THU MAY 27 2010 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITY OF EASTON... SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA... NORTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... WESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY... NORTH CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 300 PM EDT * AT 157 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR EAST BANGOR...OR 16 MILES NORTH OF EASTON... AND MOVING SOUTH AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... EAST BANGOR...BANGOR AND PEN ARGYL AROUND 205 PM EDT... BELVIDERE AROUND 215 PM EDT... ROXBURG AROUND 225 PM EDT... HARMONY AROUND 230 PM EDT... FORKS AROUND 240 PM EDT... EASTON AROUND 245 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4057 7482 4045 7530 4096 7530 4101 7506 TIME...MOT...LOC 1759Z 352DEG 17KT 4091 7517 $$ PO
2 follow-up statements
034
WWUS51 KPHI 271830
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
230 PM EDT THU MAY 27 2010
PAC089-271838-
/O.CAN.KPHI.SV.W.0039.000000T0000Z-100527T1900Z/
MONROE PA-
230 PM EDT THU MAY 27 2010
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MONROE COUNTY IS
CANCELLED...
LAT...LON 4057 7482 4045 7530 4090 7527 4091 7525
4094 7509
TIME...MOT...LOC 1828Z 352DEG 13KT 4083 7516
$$
NJC019-041-PAC017-095-271900-
/O.CON.KPHI.SV.W.0039.000000T0000Z-100527T1900Z/
WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-
230 PM EDT THU MAY 27 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTH CENTRAL BUCKS...EASTERN NORTHAMPTON...NORTHERN HUNTERDON
AND SOUTHWESTERN WARREN COUNTIES...
AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED NEAR EAST BANGOR...OR 11 MILES NORTH OF
EASTON...MOVING SOUTH AT 15 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
ROXBURG BY 245 PM EDT...
HARMONY AND 6 MILES EAST OF TATAMY BY 250 PM EDT...
PHILLIPSBURG...ALPHA...EASTON AND FORKS BY 300 PM EDT...
IN ADDITION TO THE THREAT OF SEVERE WEATHER...THIS STORM IS ALSO
PRODUCING VERY HEAVY RAIN WHICH COULD CAUSE FLASH FLOODING.
LAT...LON 4057 7482 4045 7530 4090 7527 4091 7525
4094 7509
TIME...MOT...LOC 1828Z 352DEG 13KT 4083 7516
$$
AMC567
WWUS51 KPHI 271857
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
257 PM EDT THU MAY 27 2010
NJC019-041-PAC017-095-271904-
/O.EXP.KPHI.SV.W.0039.000000T0000Z-100527T1900Z/
WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-
257 PM EDT THU MAY 27 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BUCKS...EASTERN
NORTHAMPTON...NORTHERN HUNTERDON AND SOUTHWESTERN WARREN COUNTIES
WILL EXPIRE AT 300 PM EDT...
THE THUNDERSTORM HAS WEAKED RECENTLY...AND IS NO LONGER SEVERE. THE
WEAKENING TREND SHOULD CONTINUE. HEAVY RAINS AND SMALL HAIL ARE
STILL POSSIBLE OVER SOUTHERN WARREN AND NORTHERN HUNTERDON
COUNTIES.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4057 7482 4045 7530 4090 7527 4091 7525
4094 7509
TIME...MOT...LOC 1854Z 352DEG 13KT 4074 7514
$$
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, 3:19 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 41 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 Pennsylvania, 2010Severe Thunderstorm Warnings in New Jersey, 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.