Alert archive / Delaware / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 180, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 9, 2012, 2:19 PM EDT for Sussex County, Delaware. It was in force for 56 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 9, 2012, 2:19 PM EDT (18:19 UTC)
- Expired
- Aug 9, 2012, 3:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 42 km from the middle of the area, began a volume at 18:20 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.3 hours before the alert went out and 67 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
- 2382 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 702 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
584
WUUS51 KPHI 091819
SVRPHI
DEC005-091915-
/O.NEW.KPHI.SV.W.0180.120809T1819Z-120809T1915Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
219 PM EDT THU AUG 9 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN SUSSEX COUNTY IN CENTRAL DELAWARE...
* UNTIL 315 PM EDT
* AT 216 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR
SELBYVILLE...OR 17 MILES SOUTHEAST OF GEORGETOWN...AND MOVING EAST
AT 10 MPH. A SECOND INTENSIFYING STORM WHICH MIGHT ALSO BECOME
SEVERE IS NEAR MILLSBORO.
* THE FIRST SEVERE THUNDERSTORM WILL BE NEAR...
MILLVILLE AROUND 300 PM EDT...
FENWICK ISLAND AROUND 310 PM EDT...
BETHANY BEACH AROUND 315 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND A TREMENDOUS
AMOUNT OF 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 3852 7534 3864 7533 3853 7504 3852 7504
3845 7504 3844 7505 3844 7532
TIME...MOT...LOC 1818Z 254DEG 8KT 3848 7522
$$
TFG1 follow-up statement
834
WWUS51 KPHI 091857
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
257 PM EDT THU AUG 9 2012
DEC005-091915-
/O.CON.KPHI.SV.W.0180.000000T0000Z-120809T1915Z/
SUSSEX DE-
257 PM EDT THU AUG 9 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
AT 253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS TO 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM DAGSBORO TO FRANKFORD...OR
ALONG A LINE EXTENDING FROM 11 MILES SOUTHEAST OF GEORGETOWN TO 15
MILES SOUTH OF GEORGETOWN...MOVING SOUTHEAST AT 10 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
FRANKFORD BY 310 PM EDT...
SELBYVILLE...MILLVILLE...6 MILES WEST OF OCEAN VIEW AND 7 MILES
WEST OF BETHANY BEACH BY 315 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3854 7531 3861 7526 3853 7504 3845 7504
3844 7505 3844 7532
TIME...MOT...LOC 1857Z 323DEG 7KT 3859 7522 3848 7530
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 12:34 PM EDT | Special Weather Statement | PHI | Kent | 56 min |
| Aug 9, 1:04 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 23 min |
| Aug 9, 1:17 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 43 min |
| Aug 9, 1:39 PM EDT | Special Weather Statement | PHI | Kent | 66 min |
| Aug 9, 1:55 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 65 min |
| Aug 9, 2:04 PM EDT | Special Weather Statement | PHI | Kent | 56 min |
| Aug 9, 2:23 PM EDT | Special Weather Statement | PHI | Sussex | 52 min |
| Aug 9, 3:17 PM EDT | Special Weather Statement | PHI | Sussex | 88 min |
| Aug 9, 3:42 PM EDT | Areal Flood Advisory | PHI | Sussex | 119 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.