Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 139, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2012, 6:41 PM EDT for Queen Anne's County, Talbot County, Maryland. It was in force for 64 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
- Jul 28, 2012, 6:41 PM EDT (22:41 UTC)
- Expired
- Jul 28, 2012, 7:45 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties 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 22:42 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 |
|---|---|---|---|
| Jul 28, 6:42 PM EDT | HAIL 1 | Mcdaniel, MD | QUARTER SIZE HAIL REPORTED IN MCDANIEL. |
| Jul 28, 6:55 PM EDT | TSTM WND DMG | Saint Michaels, MD | TREES DOWN IN ST MICHAELS. |
| Jul 28, 7:16 PM EDT | TSTM WND DMG | 1 Nnw Easton, MD | TREES DOWN IN EASTON. |
| Jul 28, 7:18 PM EDT | HAIL 0.5 | Easton, MD |
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 |
|---|---|---|---|
| Jul 28, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 hours before the alert went out and 102 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
- 552 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1087 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
894
WUUS51 KPHI 282241
SVRPHI
MDC035-041-282345-
/O.NEW.KPHI.SV.W.0139.120728T2241Z-120728T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
641 PM EDT SAT JUL 28 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
TALBOT COUNTY IN EASTERN MARYLAND...
THIS INCLUDES THE CITY OF EASTON...
SOUTHWESTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
* UNTIL 745 PM EDT
* AT 640 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 GRASONVILLE TO TALBOT TO 12
MILES SOUTHWEST OF TILGHMAN ISLAND TO 25 MILES SOUTHWEST OF
TILGHMAN ISLAND...OR ALONG A LINE EXTENDING FROM 16 MILES NORTHWEST
OF EASTON TO 10 MILES NORTHWEST OF EASTON TO 25 MILES WEST OF
EASTON TO 38 MILES WEST OF EASTON...AND MOVING EAST AT 15 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
ST. MICHAELS AROUND 650 PM EDT...
COPPERVILLE AROUND 705 PM EDT...
OXFORD AROUND 720 PM EDT...
EASTON AROUND 735 PM EDT...
HAMBLETON AROUND 740 PM EDT...
TRAPPE AROUND 745 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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3860 7613 3872 7626 3872 7631 3866 7634
3876 7640 3878 7637 3876 7635 3887 7626
3881 7621 3882 7620 3893 7623 3894 7624
3890 7625 3892 7628 3889 7627 3890 7632
3902 7619 3876 7600 3857 7603
TIME...MOT...LOC 2241Z 330DEG 14KT 3897 7621 3883 7624
3865 7650 3856 7672
$$
HAYES2 follow-up statements
406
WWUS51 KPHI 282302
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
702 PM EDT SAT JUL 28 2012
MDC035-041-282345-
/O.CON.KPHI.SV.W.0139.000000T0000Z-120728T2345Z/
TALBOT MD-QUEEN ANNE'S MD-
702 PM EDT SAT JUL 28 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTH CENTRAL QUEEN ANNE'S AND TALBOT COUNTIES...
AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM GRASONVILLE TO ST. MICHAELS
TO 13 MILES SOUTHWEST OF TILGHMAN ISLAND TO 25 MILES SOUTHWEST OF
TILGHMAN ISLAND...MOVING EAST AT 15 MPH.
THIS STORM HAS A HISTORY OF PRODUCING QUARTER SIZED HAIL IN TALBOT
COUNTY.
SEVERE THUNDERSTORMS WILL BE NEAR...
OXFORD BY 720 PM EDT...
EASTON BY 740 PM EDT...
HAMBLETON AND TRAPPE BY 745 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3861 7614 3872 7626 3872 7631 3866 7634
3874 7635 3876 7640 3877 7637 3875 7635
3887 7626 3880 7621 3881 7620 3893 7623
3890 7625 3892 7628 3889 7627 3889 7631
3900 7618 3876 7600 3857 7603
TIME...MOT...LOC 2302Z 330DEG 14KT 3890 7616 3876 7621
3858 7645 3849 7667
$$
HAYES255
WWUS51 KPHI 282338
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
738 PM EDT SAT JUL 28 2012
MDC035-041-282348-
/O.EXP.KPHI.SV.W.0139.000000T0000Z-120728T2345Z/
TALBOT MD-QUEEN ANNE'S MD-
738 PM EDT SAT JUL 28 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL QUEEN ANNE'S AND
TALBOT COUNTIES WILL EXPIRE AT 745 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 3861 7614 3872 7626 3872 7631 3866 7634
3874 7635 3876 7640 3877 7637 3875 7635
3887 7626 3880 7621 3881 7620 3893 7623
3890 7625 3892 7628 3889 7627 3889 7631
3900 7618 3876 7600 3857 7603
TIME...MOT...LOC 2338Z 330DEG 14KT 3878 7607 3864 7612
3846 7636 3837 7658
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 3:12 PM EDT | Special Weather Statement | PHI | Cecil | 63 min |
| Jul 28, 4:10 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 65 min |
| Jul 28, 4:24 PM EDT | Areal Flood Advisory | PHI | Cecil | 95 min |
| Jul 28, 5:20 PM EDT | Special Weather Statement | PHI | Cecil | 55 min |
| Jul 28, 6:09 PM EDT | Special Weather Statement | PHI | Queen Anne's, Talbot | 66 min |
| Jul 28, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 53 min |
| Jul 28, 7:57 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 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.