Alert archive / Maryland / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 107, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 12, 2013, 6:21 PM EDT for Talbot County, Maryland. It was in force for 39 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
- Sep 12, 2013, 6:21 PM EDT (22:21 UTC)
- Expired
- Sep 12, 2013, 7:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Talbot County, MD
The radar
The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 22:24 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 |
|---|---|---|---|
| Sep 12, 2:50 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.4 hours before the alert went out and 80 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
- 1009 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 970 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
604
WUUS51 KPHI 122221
SVRPHI
MDC041-122300-
/O.NEW.KPHI.SV.W.0107.130912T2221Z-130912T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
621 PM EDT THU SEP 12 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 700 PM EDT
* AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR ST. MICHAELS...MOVING EAST
AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
COPPERVILLE AROUND 630 PM EDT...
HAMBLETON AND TRAPPE AROUND 640 PM EDT...
EASTON AROUND 645 PM EDT...
SKIPTON AROUND 650 PM EDT...
WINDYHILL AROUND 655 PM EDT...
CORDOVA AROUND 700 PM EDT...
LAT...LON 3882 7632 3884 7625 3881 7621 3885 7620
3892 7599 3878 7596 3873 7601 3867 7594
3865 7595 3864 7618 3866 7617 3868 7623
3873 7626 3870 7627 3872 7632 3879 7634
TIME...MOT...LOC 2221Z 259DEG 17KT 3874 7620
$$
FORECASTER: AMC1 follow-up statement
595
WWUS51 KPHI 122257
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
657 PM EDT THU SEP 12 2013
MDC041-122305-
/O.EXP.KPHI.SV.W.0107.000000T0000Z-130912T2300Z/
TALBOT MD-
657 PM EDT THU SEP 12 2013
...THE SEVERE THUNDERSTORM WARNING FOR TALBOT COUNTY WILL EXPIRE AT
700 PM EDT...
THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.
ALTHOUGH NOT LIKELY TO BE SEVERE...SHOWERS AND THUNDERSTORMS WILL
CONTINUE OVER THE AREA FOR A WHILE LONGER. RESIDENTS SHOULD EXERCISE
APPROPRIATE CAUTION.
LAT...LON 3882 7632 3884 7625 3881 7621 3885 7620
3892 7599 3878 7596 3873 7601 3867 7594
3865 7595 3864 7618 3866 7617 3868 7623
3873 7626 3870 7627 3872 7632 3879 7634
TIME...MOT...LOC 2255Z 259DEG 17KT 3877 7600
$$
FORECASTER: AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 2:21 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 54 min |
| Sep 12, 5:58 PM EDT | Special Weather Statement | PHI | Queen Anne's, Talbot | 62 min |
| Sep 12, 6:40 PM EDT | Special Weather Statement | PHI | Caroline | 65 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2013Every severe thunderstorm warning in 2013
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.