Alert archive / Delaware / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 88, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 28, 2010, 4:20 PM EDT for Sussex County, Delaware. It was in force for 55 min. 4 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
- Jun 28, 2010, 4:20 PM EDT (20:20 UTC)
- Expired
- Jun 28, 2010, 5:15 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 21 km from the middle of the area, began a volume at 20:22 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 |
|---|---|---|---|
| Jun 28, 4:40 PM EDT | TSTM WND DMG | Georgetown, DE | WIRES DOWN ALONG COUNTY ROUTE 113. |
| Jun 28, 4:40 PM EDT | TSTM WND GST 61 | 5 N Georgetown, DE | AWS - NORTH GEORGETOWN ES. |
| Jun 28, 4:49 PM EDT | TSTM WND GST 51 | Lewes, DE | |
| Jun 28, 5:03 PM EDT | TSTM WND GST 50 | Dewey Beach, DE |
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 |
|---|---|---|---|
| Jun 28, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.3 hours before the alert went out and 88 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
- 877 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1364 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
600
WUUS51 KPHI 282020
SVRPHI
DEC005-282115-
/O.NEW.KPHI.SV.W.0088.100628T2020Z-100628T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
420 PM EDT MON JUN 28 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 515 PM EDT
* AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR SEAFORD...OR 11 MILES WEST
OF GEORGETOWN...AND MOVING EAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
GEORGETOWN AROUND 440 PM EDT...
MILTON AROUND 450 PM EDT...
LEWES AROUND 505 PM EDT...
8 MILES NORTH OF REHOBOTH BEACH AROUND 510 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
&&
LAT...LON 3854 7570 3878 7567 3878 7538 3882 7518
3879 7513 3879 7511 3881 7509 3881 7508
3867 7507 3866 7506 3866 7507 3857 7506
TIME...MOT...LOC 2020Z 249DEG 26KT 3869 7558
$$
TFG1 follow-up statement
648
WWUS51 KPHI 282102
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
502 PM EDT MON JUN 28 2010
DEC005-282115-
/O.CON.KPHI.SV.W.0088.000000T0000Z-100628T2115Z/
SUSSEX DE-
502 PM EDT MON JUN 28 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SUSSEX COUNTY...
AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM LEWES TO LAUREL...OR ALONG A LINE EXTENDING FROM 16
MILES NORTHEAST OF GEORGETOWN TO 12 MILES SOUTHWEST OF GEORGETOWN...
MOVING EAST AT 30 MPH.
IT MAY BECOME NECESSARY TO ISSUE A NEW SEVERE THUNDERSTORM WARNING.
SEVERE THUNDERSTORMS WILL BE NEAR...
HENLOPEN ACRES BY 510 PM EDT...
REHOBOTH BEACH...MILLSBORO...DEWEY BEACH AND LONG NECK BY 515 PM
EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
&&
LAT...LON 3854 7564 3867 7545 3877 7535 3882 7518
3879 7513 3879 7511 3881 7509 3881 7508
3867 7507 3866 7506 3866 7507 3857 7506
TIME...MOT...LOC 2102Z 276DEG 26KT 3879 7511 3856 7551
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 4:33 AM EDT | Heat Advisory | PHI | Kent, Sussex | 12 hr |
| Jun 28, 1:48 PM EDT | Special Weather Statement | PHI | New Castle | 87 min |
| Jun 28, 2:40 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 95 min |
| Jun 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 64 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 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.