Alert archive / Maryland / Tornado Warnings in 2011
Tornado Warning 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 27, 2011, 8:49 PM EDT for Kent County, Delaware; Kent County, Queen Anne's County, Maryland. It was in force for 26 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 27, 2011, 8:49 PM EDT (00:49 UTC)
- Expired
- Aug 27, 2011, 9:15 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 51 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 27, 7:56 PM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.8 hours before the alert went out and 143 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
- 117 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
984
WFUS51 KPHI 280049
TORPHI
DEC001-MDC029-035-280115-
/O.NEW.KPHI.TO.W.0018.110828T0049Z-110828T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
849 PM EDT SAT AUG 27 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
THIS INCLUDES THE CITY OF DOVER...
NORTHEASTERN KENT COUNTY IN NORTHEAST MARYLAND...
NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
* UNTIL 915 PM EDT
* AT 843 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CAMDEN...OR
NEAR DOVER...MOVING NORTHWEST AT 35 MPH.
* THE TORNADO WILL BE NEAR...
HARTLY BY 900 PM EDT...
SUDLERSVILLE...MILLINGTON...6 MILES EAST OF CRUMPTON AND 7 MILES
SOUTH OF MASSEY BY 915 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.
&&
LAT...LON 3936 7592 3930 7576 3929 7576 3930 7575
3920 7548 3903 7557 3908 7575 3914 7576
3914 7581 3910 7584 3916 7603
TIME...MOT...LOC 0049Z 113DEG 21KT 3915 7563
$$
HAYES/GAINES2 follow-up statements
664
WWUS51 KPHI 280057
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
857 PM EDT SAT AUG 27 2011
DEC001-MDC029-035-280115-
/O.CON.KPHI.TO.W.0018.000000T0000Z-110828T0115Z/
KENT DE-KENT MD-QUEEN ANNE'S MD-
857 PM EDT SAT AUG 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN KENT AND NORTHWESTERN KENT
COUNTIES...
AT 853 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR HARTLY...OR 8
MILES WEST OF DOVER...MOVING NORTHWEST AT 35 MPH.
THE TORNADO WILL BE NEAR...
SUDLERSVILLE...MILLINGTON...BARCLAY AND 6 MILES EAST OF CRUMPTON BY
915 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.
&&
LAT...LON 3936 7592 3930 7576 3929 7576 3930 7575
3920 7548 3903 7557 3908 7575 3914 7576
3914 7581 3910 7584 3916 7603
TIME...MOT...LOC 0058Z 113DEG 21KT 3917 7569
$$
HAYES659
WWUS51 KPHI 280113
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
913 PM EDT SAT AUG 27 2011
DEC001-MDC029-035-280123-
/O.EXP.KPHI.TO.W.0018.000000T0000Z-110828T0115Z/
KENT DE-KENT MD-QUEEN ANNE'S MD-
913 PM EDT SAT AUG 27 2011
...THE TORNADO WARNING FOR NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN
KENT AND NORTHWESTERN KENT COUNTIES WILL EXPIRE AT 915 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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.
LAT...LON 3936 7592 3930 7576 3929 7576 3930 7575
3920 7548 3903 7557 3908 7575 3914 7576
3914 7581 3910 7584 3916 7603
TIME...MOT...LOC 0113Z 113DEG 21KT 3920 7579
$$
HAYES/GAINESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:28 PM EDT | Flash Flood Warning | PHI | Kent, New Castle, Sussex | 12 hr |
| Aug 27, 8:33 PM EDT | Tornado Warning | PHI | Kent, Sussex | 27 min |
| Aug 27, 9:46 PM EDT | Tornado Warning | PHI | New Castle | 29 min |
| Aug 27, 10:14 PM EDT | Tornado Warning | PHI | New Castle | 31 min |
| Aug 27, 11:37 PM EDT | Flash Flood Warning | PHI | New Castle | 12 hr |
| Aug 28, 7:07 AM EDT | Areal Flood Warning | PHI | Kent, Sussex | 12 hr |
| Aug 28, 8:09 AM EDT | Areal Flood Warning | PHI | New Castle | 12 hr |
| Aug 28, 11:07 AM EDT | Areal Flood Warning | PHI | New Castle | 18 hr |
| Aug 28, 7:03 PM EDT | Areal Flood Warning | PHI | Sussex | 22 hr |
| Aug 28, 3:23 PM EDT | Coastal Flood Statement | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 82 min |
Nearby
Tornado Warnings in Maryland, 2011Tornado Warnings in Delaware, 2011Every tornado warning in 2011Tornadoes in 2011
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.