Alert archive / Delaware / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 154, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 3, 2012, 4:58 PM EDT for New Castle County, Delaware; Cecil County, Maryland. It was in force for 40 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
- Aug 3, 2012, 4:58 PM EDT (20:58 UTC)
- Expired
- Aug 3, 2012, 5:38 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD
The radar
The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 20:59 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.0 hours before the alert went out and 35 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
- 1112 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 961 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
409
WUUS51 KPHI 032058
SVRPHI
DEC003-MDC015-032200-
/O.NEW.KPHI.SV.W.0154.120803T2058Z-120803T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
458 PM EDT FRI AUG 3 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF MIDDLETOWN...
* UNTIL 600 PM EDT
* AT 457 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
WARWICK...OR NEAR MIDDLETOWN...AND MOVING NORTHEAST AT 10 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
MIDDLETOWN AND BOHEMIAS MILLS AROUND 525 PM EDT...
MOUNT PLEASANT AROUND 555 PM EDT...
SAINT GEORGES...7 MILES WEST OF PORT PENN AND 7 MILES SOUTHWEST OF
DELAWARE CITY AROUND 600 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3950 7580 3963 7571 3957 7555 3952 7555
3948 7558 3945 7558 3940 7568 3937 7576
3942 7588
TIME...MOT...LOC 2058Z 206DEG 7KT 3941 7577
$$
HEAVENER2 follow-up statements
112
WWUS51 KPHI 032128
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
528 PM EDT FRI AUG 3 2012
DEC003-032138-
/O.CAN.KPHI.SV.W.0154.000000T0000Z-120803T2200Z/
NEW CASTLE DE-
528 PM EDT FRI AUG 3 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN NEW CASTLE COUNTY IS
CANCELLED...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3950 7580 3952 7579 3950 7577 3942 7577
3941 7577 3938 7577 3938 7578 3942 7588
TIME...MOT...LOC 2128Z 206DEG 7KT 3946 7574
$$
MDC015-032200-
/O.CON.KPHI.SV.W.0154.000000T0000Z-120803T2200Z/
CECIL MD-
528 PM EDT FRI AUG 3 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN CECIL COUNTY...
AT 526 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR BOHEMIAS MILLS...OR NEAR MIDDLETOWN...MOVING NORTHEAST
AT 10 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3950 7580 3952 7579 3950 7577 3942 7577
3941 7577 3938 7577 3938 7578 3942 7588
TIME...MOT...LOC 2128Z 206DEG 7KT 3946 7574
$$
HEAVENER100
WWUS51 KPHI 032138
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
538 PM EDT FRI AUG 3 2012
MDC015-032148-
/O.CAN.KPHI.SV.W.0154.000000T0000Z-120803T2200Z/
CECIL MD-
538 PM EDT FRI AUG 3 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CECIL COUNTY IS
CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS MOVED TO THE NORTHWEST.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3950 7580 3952 7579 3950 7577 3942 7577
3941 7577 3938 7577 3938 7578 3942 7588
TIME...MOT...LOC 2138Z 206DEG 7KT 3948 7573
$$
HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 2:58 PM EDT | Special Weather Statement | PHI | Sussex | 62 min |
| Aug 3, 3:57 PM EDT | Special Weather Statement | PHI | New Castle | 63 min |
| Aug 3, 4:14 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Aug 3, 4:17 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 58 min |
| Aug 3, 5:46 PM EDT | Areal Flood Advisory | PHI | New Castle | 101 min |
| Aug 3, 5:24 PM EDT | Special Weather Statement | PHI | Cecil | 66 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2012Severe Thunderstorm Warnings in Maryland, 2012Every severe thunderstorm warning in 2012
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.