Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 166, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 5, 2012, 5:10 PM EDT for 5 counties in Maryland. It was in force for 80 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
- Aug 5, 2012, 5:10 PM EDT (21:10 UTC)
- Expired
- Aug 5, 2012, 6:30 PM EDT
- In force
- 80 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 21:10 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 |
|---|---|---|---|
| Aug 5, 6:04 PM EDT | TSTM WND DMG | Chestertown, MD | NUMEROUS TREES AND WIRES DOWN FROM CHESTERTOWN TO FAIRLEE. |
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 |
|---|---|---|---|
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 hours before the alert went out and 103 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
- 809 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1048 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
415
WUUS51 KPHI 052110
SVRPHI
MDC011-015-029-035-041-052230-
/O.NEW.KPHI.SV.W.0166.120805T2110Z-120805T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
510 PM EDT SUN AUG 5 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHERN TALBOT COUNTY IN EASTERN MARYLAND...
SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
* UNTIL 630 PM EDT
* AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 20 MILES WEST OF NEWTOWN TO 21
MILES WEST OF ROCK HALL TO 16 MILES WEST OF CHESAPEAKE BAY
BRIDGE...OR ALONG A LINE EXTENDING FROM 10 MILES NORTHEAST OF
BALTIMORE TO BALTIMORE TO 19 MILES SOUTH OF BALTIMORE...AND MOVING
EAST AT 25 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
KENT POINT AND CHESAPEAKE BAY BRIDGE AROUND 540 PM EDT...
ROMANCOKE AND STEVENSVILLE AROUND 545 PM EDT...
CHESTER AND ROCK HALL AROUND 550 PM EDT...
BETTERTON...OVERTON AND NEWTOWN AROUND 555 PM EDT...
GRASONVILLE AROUND 600 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 3904 7633 3904 7632 3899 7627 3900 7618
3902 7624 3914 7629 3932 7619 3940 7605
3940 7577 3883 7572 3883 7621 3886 7623
3883 7630 3884 7630 3887 7621 3894 7624
3891 7624 3890 7632 3886 7632 3883 7638
TIME...MOT...LOC 2109Z 277DEG 23KT 3941 7647 3924 7659
3903 7661
$$
HEAVENER2 follow-up statements
067
WWUS51 KPHI 052200
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
600 PM EDT SUN AUG 5 2012
MDC041-052209-
/O.CAN.KPHI.SV.W.0166.000000T0000Z-120805T2230Z/
TALBOT MD-
600 PM EDT SUN AUG 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN TALBOT COUNTY IS
CANCELLED...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3900 7574 3898 7624 3899 7624 3900 7618
3902 7624 3903 7624 3914 7626 3927 7622
3932 7619 3940 7605 3940 7577
TIME...MOT...LOC 2159Z 277DEG 23KT 3937 7606 3920 7618
3899 7620
$$
MDC011-015-029-035-052230-
/O.CON.KPHI.SV.W.0166.000000T0000Z-120805T2230Z/
CECIL MD-KENT MD-CAROLINE MD-QUEEN ANNE'S MD-
600 PM EDT SUN AUG 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR QUEEN ANNE'S...NORTHERN CAROLINE...KENT AND SOUTHEASTERN CECIL
COUNTIES...
AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM BETTERTON TO LANGFORD TO
OVERTON...OR ALONG A LINE EXTENDING FROM 21 MILES WEST OF MIDDLETOWN
TO 22 MILES EAST OF BALTIMORE TO 18 MILES NORTHWEST OF EASTON...
MOVING EAST AT 25 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
LANGFORD AND QUEENSTOWN BY 605 PM EDT...
OLD TOWN...KENNEDYVILLE AND CHESTERTOWN BY 610 PM EDT...
MORGNEC...KINGSTOWN AND CENTREVILLE BY 615 PM EDT...
STARKEY CORNER AND CARVILLE BY 620 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 3900 7574 3898 7624 3899 7624 3900 7618
3902 7624 3903 7624 3914 7626 3927 7622
3932 7619 3940 7605 3940 7577
TIME...MOT...LOC 2159Z 277DEG 23KT 3937 7606 3920 7618
3899 7620
$$
HEAVENER602
WWUS51 KPHI 052227
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
627 PM EDT SUN AUG 5 2012
MDC011-015-029-035-052237-
/O.EXP.KPHI.SV.W.0166.000000T0000Z-120805T2230Z/
CECIL MD-KENT MD-CAROLINE MD-QUEEN ANNE'S MD-
627 PM EDT SUN AUG 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR QUEEN ANNE'S...NORTHERN
CAROLINE...KENT AND SOUTHEASTERN CECIL COUNTIES WILL EXPIRE AT 630 PM
EDT...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3900 7574 3898 7624 3899 7624 3900 7618
3902 7624 3903 7624 3914 7626 3927 7622
3932 7619 3940 7605 3940 7577
TIME...MOT...LOC 2227Z 277DEG 23KT 3935 7583 3918 7595
3897 7597
$$
HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 4:40 PM EDT | Special Weather Statement | PHI | Cecil | 95 min |
| Aug 5, 4:54 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 51 min |
| Aug 5, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 82 min |
| Aug 5, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 39 min |
| Aug 5, 7:52 PM EDT | Special Weather Statement | PHI | Queen Anne's | 68 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 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.