Alert archive / Delaware / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2010, 9:57 PM EDT for New Castle County, Delaware; Salem County, New Jersey. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 14, 2010, 9:57 PM EDT (01:57 UTC)
- Expired
- May 14, 2010, 10:45 PM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 01:58 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 14, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 2.0 hours before the alert went out and 184 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
- 2598 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1130 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.2
The text
As transmitted, in the capitals the NWS used until 2016.
796
WUUS51 KPHI 150157
SVRPHI
DEC003-NJC033-150245-
/O.NEW.KPHI.SV.W.0035.100515T0157Z-100515T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
957 PM EDT FRI MAY 14 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITIES OF...WILMINGTON...NEWARK...
NORTH CENTRAL SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 1045 PM EDT
* AT 953 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
NORTH STAR...OR 6 MILES NORTHEAST OF NEWARK...AND MOVING EAST AT 30
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ELSMERE...NEWPORT AND WILMINGTON MANOR AROUND 1005 PM EDT...
WILMINGTON AND TALLEYVILLE AROUND 1010 PM EDT...
PENNS GROVE...CARNEYS POINT AND ARDEN AROUND 1015 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3979 7574 3982 7570 3984 7551 3980 7542
3978 7542 3977 7540 3972 7537 3968 7532
3967 7525 3967 7552 3969 7552 3967 7555
3967 7577
TIME...MOT...LOC 0157Z 273DEG 28KT 3975 7567
$$
HAYES1 follow-up statement
587
WWUS51 KPHI 150242
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1042 PM EDT FRI MAY 14 2010
DEC003-NJC033-150253-
/O.EXP.KPHI.SV.W.0035.000000T0000Z-100515T0245Z/
SALEM NJ-NEW CASTLE DE-
1042 PM EDT FRI MAY 14 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE AND NORTH
CENTRAL SALEM COUNTIES WILL EXPIRE AT 1045 PM EDT...
LAT...LON 3979 7574 3982 7570 3984 7551 3980 7542
3978 7542 3977 7540 3972 7537 3968 7532
3967 7525 3967 7552 3969 7552 3967 7555
3967 7577
TIME...MOT...LOC 0243Z 273DEG 28KT 3973 7521
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 56 min |
| May 14, 8:49 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 56 min |
| May 14, 9:05 PM EDT | Special Weather Statement | PHI | New Castle | 55 min |
| May 14, 9:06 PM EDT | Special Weather Statement | PHI | New Castle | 54 min |
| May 14, 9:45 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 60 min |
| May 14, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 46 min |
| May 14, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Gloucester, Salem | 61 min |
| May 14, 8:32 PM EDT | Special Marine Warning | PHI | 88 min | |
| May 14, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 40 min |
| May 14, 8:44 PM EDT | Special Weather Statement | PHI | Burlington | 61 min |
| May 14, 9:17 PM EDT | Special Weather Statement | PHI | Monmouth | 58 min |
| May 14, 9:31 PM EDT | Special Weather Statement | PHI | Atlantic | 59 min |
| May 14, 9:36 PM EDT | Special Weather Statement | PHI | Cape May | 54 min |
| May 14, 9:47 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland | 30 min |
| May 14, 9:49 PM EDT | Special Marine Warning | PHI | 86 min | |
| May 14, 10:09 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 37 min |
| May 14, 10:19 PM EDT | Special Weather Statement | PHI | Atlantic | 56 min |
| May 14, 10:30 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic | 35 min |
| May 14, 10:35 PM EDT | Special Weather Statement | PHI | Camden, Gloucester | 55 min |
| May 14, 10:41 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 49 min |
| May 14, 10:59 PM EDT | Special Weather Statement | PHI | Atlantic | 61 min |
| May 14, 11:30 PM EDT | Special Weather Statement | PHI | Atlantic | 45 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.