Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 9, 2020, 12:57 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 33 min. 2 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
- Apr 9, 2020, 12:57 PM EDT (16:57 UTC)
- Expired
- Apr 9, 2020, 1:30 PM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 16:57 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 |
|---|---|---|---|
| Apr 9, 1:24 PM EDT | TSTM WND DMG | 2 N Hambleton, MD | SEVERAL REPORTS OF TREES AND WIRES DOWN NEAR U.S. HIGHWAY 50 AND STATE HIGHWAY 565. POWER OUTAGES REPORTED AT THE TIME IN THE AREA. TIME ESTIMATED FROM RADAR. |
| Apr 9, 1:29 PM EDT | TSTM WND DMG | 3 Wsw Harmony, MD | DOWNED TREES AND WIRES. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Apr 9, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.0 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
- 20 J/kg
- Mixed-layer CIN
- -589 J/kg
- Mixed-layer LCL
- 1002 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 394 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
103
WUUS51 KPHI 091657
SVRPHI
MDC011-035-041-091730-
/O.NEW.KPHI.SV.W.0018.200409T1657Z-200409T1730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1257 PM EDT Thu Apr 9 2020
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...
Southern Caroline County in eastern Maryland...
* Until 130 PM EDT.
* At 1257 PM EDT, a severe thunderstorm was located over Romancoke,
or 10 miles east of South River, moving east at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Easton, Talbot, Denton, Ridgely, Trappe, St. Michaels, Preston,
Queen Anne, Tanyard, Harmony, Skipton, Copperville, Matthews,
Choptank, Wye Mills, Hambleton, Griffin, Windyhill, Cordova and
Hillsboro.
People attending Covid-19 Drive through testing should seek safe
shelter immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
&&
LAT...LON 3896 7635 3894 7576 3870 7585 3863 7599
3872 7623 3876 7622 3873 7626 3878 7629
3876 7633 3890 7629 3879 7620 3879 7619
3890 7620 3891 7625 3894 7621 3891 7629
3895 7631 3884 7637 3885 7638
TIME...MOT...LOC 1657Z 278DEG 51KT 3887 7630
HAIL...0.75IN
WIND...60MPH
$$
MPS1 follow-up statement
385
WWUS51 KPHI 091728
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
128 PM EDT Thu Apr 9 2020
MDC011-035-041-091738-
/O.EXP.KPHI.SV.W.0018.000000T0000Z-200409T1730Z/
Talbot MD-Queen Anne's MD-Caroline MD-
128 PM EDT Thu Apr 9 2020
...THE SEVERE THUNDERSTORM WARNING FOR TALBOT...SOUTHWESTERN QUEEN
ANNE'S AND SOUTHERN CAROLINE COUNTIES WILL EXPIRE AT 130 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 400 PM EDT for
eastern and northeastern Maryland.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3896 7635 3894 7576 3870 7585 3863 7599
3872 7623 3876 7622 3873 7626 3878 7629
3876 7633 3890 7629 3879 7620 3879 7619
3890 7620 3891 7625 3894 7621 3891 7629
3895 7631 3884 7637 3885 7638
TIME...MOT...LOC 1728Z 278DEG 51KT 3881 7575
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 6:53 AM EDT | Special Weather Statement | PHI | Queen Anne's, Talbot | 37 min |
| Apr 9, 7:35 AM EDT | Special Weather Statement | PHI | Caroline, Kent | 40 min |
| Apr 9, 12:29 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 31 min |
| Apr 9, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 min |
| Apr 9, 3:32 PM EDT | Wind Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 27 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2020Every severe thunderstorm warning in 2020
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.