Alert archive / Maryland / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 260, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 13, 2021, 6:29 PM EDT for Queen Anne's County, Talbot County, Maryland. It was in force for 25 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 13, 2021, 6:29 PM EDT (22:29 UTC)
- Expired
- Aug 13, 2021, 6:54 PM EDT
- In force
- 25 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 71 km from the middle of the area, began a volume at 22:30 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 13, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.5 hours before the alert went out and 100 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
- 313 J/kg
- Mixed-layer CIN
- -199 J/kg
- Mixed-layer LCL
- 1675 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144
WUUS51 KPHI 132229
SVRPHI
MDC035-041-132315-
/O.NEW.KPHI.SV.W.0260.210813T2229Z-210813T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
629 PM EDT Fri Aug 13 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Talbot County in eastern Maryland...
Southwestern Queen Anne's County in northeastern Maryland...
* Until 715 PM EDT.
* At 629 PM EDT, a severe thunderstorm was located near Kent Point,
or near South River, moving east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Easton, Talbot, Trappe, St. Michaels, Oxford, Grasonville, Tilghman
Island, Skipton, Copperville, Chester, Wye Mills, Hambleton,
Cordova, Stevensville South and Dominion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 3876 7633 3886 7626 3879 7620 3879 7619
3897 7625 3891 7624 3894 7628 3891 7631
3896 7631 3884 7638 3899 7633 3897 7597
3866 7599 3869 7621 3877 7624 3872 7630
3878 7629 3871 7635 3877 7638
TIME...MOT...LOC 2229Z 274DEG 22KT 3887 7643
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PO1 follow-up statement
324
WWUS51 KPHI 132254
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
654 PM EDT Fri Aug 13 2021
MDC035-041-132304-
/O.CAN.KPHI.SV.W.0260.000000T0000Z-210813T2315Z/
Talbot MD-Queen Anne's MD-
654 PM EDT Fri Aug 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR TALBOT AND SOUTHWESTERN QUEEN
ANNE'S COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern and northeastern Maryland.
LAT...LON 3876 7633 3886 7626 3879 7620 3879 7619
3897 7625 3891 7624 3894 7628 3891 7631
3896 7631 3884 7638 3899 7633 3897 7597
3866 7599 3869 7621 3877 7624 3872 7630
3878 7629 3871 7635 3877 7638
TIME...MOT...LOC 2253Z 274DEG 22KT 3886 7623
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 6:02 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 58 min |
| Aug 13, 6:29 PM EDT | Special Weather Statement | PHI | Caroline | 31 min |
| Aug 13, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 30 min |
| Aug 13, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 33 min |
| Aug 13, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 47 min |
| Aug 13, 7:57 PM EDT | Areal Flood Advisory | PHI | Caroline, Queen Anne's, Talbot | 93 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2021Every severe thunderstorm warning in 2021
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.