Alert archive / Delaware / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 87, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 28, 2010, 3:56 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Maryland. It was in force for 64 min. 3 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, 3:56 PM EDT (19:56 UTC)
- Expired
- Jun 28, 2010, 5:00 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 12 km from the middle of the area, began a volume at 19:57 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, 3:57 PM EDT | TSTM WND DMG | Denton, MD | WIRES DOWN |
| Jun 28, 4:10 PM EDT | TSTM WND DMG | Harrington, DE | TREE FELL ONTO HOME, RESIDENTS NOT HURT. COUPLE OF WIRES DOWN ALSO. |
| Jun 28, 4:40 PM EDT | TSTM WND GST 61 | 5 N Georgetown, DE | AWS - NORTH GEORGETOWN ES. |
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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.9 hours before the alert went out and 83 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
- 419 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1443 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
745
WUUS51 KPHI 281956
SVRPHI
DEC001-005-MDC011-035-282115-
/O.NEW.KPHI.SV.W.0087.100628T1956Z-100628T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
356 PM EDT MON JUN 28 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
THIS INCLUDES THE CITY OF DOVER...
NORTHEASTERN CAROLINE COUNTY IN EASTERN MARYLAND...
EXTREME EAST CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
NORTHERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 515 PM EDT
* AT 353 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS TO
60 MPH. THIS STORM WAS LOCATED NEAR GREENSBORO...OR 13 MILES
SOUTHEAST OF CENTERVILLE...AND MOVING EAST AT 45 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
7 MILES SOUTH OF SANDTOWN AROUND 400 PM EDT...
ANDREWSVILLE AND 9 MILES SOUTH OF VIOLA AROUND 410 PM EDT...
HARRINGTON AROUND 415 PM EDT...
MILFORD AND 7 MILES NORTH OF ELLENDALE AROUND 425 PM EDT...
7 MILES SOUTH OF BIG STONE BEACH AROUND 430 PM EDT...
SLAUGHTER BEACH AND 8 MILES NORTH OF MILTON AROUND 435 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS DOWNED TREES IN QUEEN ANNES COUNTY. SEEK SHELTER
NOW INSIDE A STURDY STRUCTURE AND STAY 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 3879 7585 3913 7583 3918 7540 3907 7539
3903 7533 3898 7529 3893 7530 3889 7525
3886 7523 3881 7519 3872 7519
TIME...MOT...LOC 1956Z 276DEG 37KT 3894 7581
$$
TFG2 follow-up statements
801
WWUS51 KPHI 282023
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 PM EDT MON JUN 28 2010
MDC011-035-282033-
/O.CAN.KPHI.SV.W.0087.000000T0000Z-100628T2115Z/
CAROLINE MD-QUEEN ANNE'S MD-
423 PM EDT MON JUN 28 2010
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL QUEEN ANNE'S AND
NORTHEASTERN CAROLINE COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM HAS MOVED INTO DELAWARE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
LAT...LON 3879 7569 3899 7568 3902 7547 3905 7539
3903 7533 3898 7529 3893 7530 3889 7525
3886 7523 3881 7519 3872 7519
TIME...MOT...LOC 2023Z 276DEG 37KT 3890 7550
$$
DEC001-005-282115-
/O.CON.KPHI.SV.W.0087.000000T0000Z-100628T2115Z/
KENT DE-SUSSEX DE-
423 PM EDT MON JUN 28 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHERN SUSSEX AND SOUTHERN KENT COUNTIES...
AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
TO ABOUT 60 MPH. THIS STORM WAS LOCATED NEAR HARRINGTON...OR 18
MILES NORTHWEST OF GEORGETOWN...MOVING EAST AT 45 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
MILFORD AND 6 MILES NORTH OF ELLENDALE BY 430 PM EDT...
SLAUGHTER BEACH AND 8 MILES SOUTH OF BIG STONE BEACH BY 435 PM
EDT...
SLAUGHTER BEACH AND 7 MILES NORTH OF MILTON BY 440 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3879 7569 3899 7568 3902 7547 3905 7539
3903 7533 3898 7529 3893 7530 3889 7525
3886 7523 3881 7519 3872 7519
TIME...MOT...LOC 2023Z 276DEG 37KT 3890 7550
$$
TFG519
WWUS51 KPHI 282100
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
500 PM EDT MON JUN 28 2010
DEC001-005-282109-
/O.CAN.KPHI.SV.W.0087.000000T0000Z-100628T2115Z/
KENT DE-SUSSEX DE-
500 PM EDT MON JUN 28 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SUSSEX AND SOUTHERN
KENT COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM HAS MOVED OUT OF KENT COUNTY AND THE NORTHERN
PART OF SUSSEX COUNTY. A SEVERE THUNDERSTORM IS STILL MOVING THROUGH
CENTRAL SUSSEX COUNTY AND THE WARNING FOR CENTRAL SUSSEX COUNTY
REMAINS IN EFFECT UNTIL 515 PM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.
LAT...LON 3879 7569 3899 7568 3902 7547 3905 7539
3903 7533 3898 7529 3893 7530 3889 7525
3886 7523 3881 7519 3872 7519
TIME...MOT...LOC 2059Z 276DEG 37KT 3887 7498
$$
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, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 55 min |
| Jun 28, 3:07 PM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's | 83 min |
| Jun 28, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 65 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2010Severe Thunderstorm Warnings in Maryland, 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.