Alert archive / Delaware / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 86, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 8, 2012, 8:52 PM EDT for Sussex County, Delaware. It was in force for 53 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
- Jul 8, 2012, 8:52 PM EDT (00:52 UTC)
- Expired
- Jul 8, 2012, 9:45 PM EDT
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 30 km from the middle of the area, began a volume at 00:53 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 |
|---|---|---|---|
| Jul 8, 8:58 PM EDT | TSTM WND DMG | Laurel, DE | TREES DOWN |
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 |
|---|---|---|---|
| Jul 8, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.9 hours before the alert went out and 71 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
- 4020 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 10.8
The text
As transmitted, in the capitals the NWS used until 2016.
004
WUUS51 KPHI 090052
SVRPHI
DEC005-090145-
/O.NEW.KPHI.SV.W.0086.120709T0052Z-120709T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
852 PM EDT SUN JUL 8 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN SUSSEX COUNTY IN CENTRAL DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 945 PM EDT
* AT 849 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
LAUREL...OR 14 MILES NORTH OF SALISBURY...AND MOVING EAST AT 20
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LAUREL AROUND 900 PM EDT...
SYCAMORE AND 6 MILES NORTH OF DELMAR AROUND 910 PM EDT...
GUMBORO AROUND 940 PM EDT...
6 MILES WEST OF SELBYVILLE...6 MILES SOUTHWEST OF DAGSBORO AND 7
MILES SOUTH OF MILLSBORO AROUND 945 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 3845 7559 3849 7571 3860 7572 3873 7564
3867 7512 3864 7510 3866 7508 3866 7505
3846 7504 3844 7506
TIME...MOT...LOC 0052Z 288DEG 17KT 3857 7562
$$
HAYES2 follow-up statements
057
WWUS51 KPHI 090113
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
913 PM EDT SUN JUL 8 2012
DEC005-090145-
/O.CON.KPHI.SV.W.0086.000000T0000Z-120709T0145Z/
SUSSEX DE-
913 PM EDT SUN JUL 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR SOUTHERN SUSSEX COUNTY...
AT 911 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR SYCAMORE...OR 12 MILES SOUTHWEST OF GEORGETOWN...MOVING
EAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
GUMBORO BY 935 PM EDT...
6 MILES SOUTH OF MILLSBORO BY 940 PM EDT...
FRANKFORD...DAGSBORO AND SELBYVILLE BY 945 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3845 7559 3872 7558 3867 7512 3864 7510
3866 7508 3866 7505 3846 7504 3844 7506
TIME...MOT...LOC 0113Z 288DEG 17KT 3854 7549
$$
HAYES914
WWUS51 KPHI 090135
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
935 PM EDT SUN JUL 8 2012
DEC005-090145-
/O.EXP.KPHI.SV.W.0086.000000T0000Z-120709T0145Z/
SUSSEX DE-
935 PM EDT SUN JUL 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SUSSEX COUNTY WILL
EXPIRE AT 945 PM EDT...
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 3845 7559 3872 7558 3867 7512 3864 7510
3866 7508 3866 7505 3846 7504 3844 7506
TIME...MOT...LOC 0135Z 288DEG 17KT 3851 7536
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 8:30 PM EDT | Special Weather Statement | PHI | Sussex | 60 min |
| Jul 8, 10:15 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 25 min |
| Jul 9, 5:20 AM EDT | Special Weather Statement | PHI | Kent, New Castle, Sussex | 3 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.