Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 25, 2017, 4:11 PM EST for 4 counties in Maryland; Kent County, Delaware. It was in force for 49 min. 3 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
- Feb 25, 2017, 4:11 PM EST (21:11 UTC)
- Expired
- Feb 25, 2017, 5:00 PM EST
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 58 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 |
|---|---|---|---|
| Feb 25, 4:15 PM EST | HAIL 1 | Wye Mills, MD | TIME ESTIMATED FROM RADAR |
| Feb 25, 4:40 PM EST | HAIL 1 | Easton, MD | TIME ESTIMATED FROM RADAR |
| Feb 25, 5:09 PM EST | HAIL 0.25 | Dover Afb, DE |
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 |
|---|---|---|---|
| Feb 25, 1:30 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 hours before the alert went out and 113 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
- 235 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 676 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
808
WUUS51 KPHI 252111
SVRPHI
DEC001-MDC011-029-035-041-252200-
/O.NEW.KPHI.SV.W.0010.170225T2111Z-170225T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
411 PM EST SAT FEB 25 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southern Kent County in central Delaware...
Talbot County in eastern Maryland...
Southern Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Southwestern Kent County in northeastern Maryland...
* Until 500 PM EST
* At 411 PM EST, severe thunderstorms were located along a line
extending from Starr to near Flag Harbor, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Severe thunderstorms will be near,
Centerville, Centreville, Queen Anne, Starr, Hope, Jumptown,
Carville, Wye Mills and Cordova around 415 PM EST.
Oakland and Ridgely around 420 PM EST.
Greensboro and Goldsboro around 425 PM EST.
Sandtown around 430 PM EST.
Trappe, Woodside, Viola, Hazlettville and Hambleton around 440 PM
EST.
Dover, Camden, Choptank, Rising Sun-Lebanon, Windyhill, Rising Sun
and Tanyard around 445 PM EST.
Preston, Dover Base Housing and Harmony around 450 PM EST.
Agner around 455 PM EST.
Other locations impacted by these severe thunderstorms include Rodney
Village, Wyoming, Kent Acres, Riverview, Highland Acres, Felton,
Queenstown, Woodside East, Marydel and Hillsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
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 3885 7627 3879 7620 3879 7619 3883 7619
3898 7626 3900 7617 3904 7620 3918 7539
3883 7567 3883 7572 3868 7579 3868 7594
3857 7604 3876 7622 3872 7629 3878 7629
3877 7631 3868 7634 3875 7637
TIME...MOT...LOC 2111Z 248DEG 43KT 3898 7602 3852 7642
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
Robertson1 follow-up statement
790
WWUS51 KPHI 252143
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
443 PM EST SAT FEB 25 2017
MDC029-252153-
/O.CAN.KPHI.SV.W.0010.000000T0000Z-170225T2200Z/
Kent MD-
443 PM EST SAT FEB 25 2017
...THE SEVERE THUNDERSTORM WARNING FOR KENT COUNTY IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 800 PM EST for
central and southern Delaware...and eastern and northeastern
Maryland.
LAT...LON 3866 7612 3906 7598 3911 7583 3918 7540
3884 7566 3883 7572 3868 7579 3871 7584
3868 7594 3865 7597 3864 7611
TIME...MOT...LOC 2143Z 248DEG 43KT 3911 7559 3866 7599
$$
DEC001-MDC011-035-041-252200-
/O.CON.KPHI.SV.W.0010.000000T0000Z-170225T2200Z/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
443 PM EST SAT FEB 25 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EST
FOR SOUTHERN KENT...EASTERN TALBOT...SOUTHEASTERN QUEEN ANNE'S AND
CAROLINE COUNTIES...
At 443 PM EST, severe thunderstorms were located along a line
extending from Camden to Windyhill, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe storms will be near...
Dover, Camden, Woodside, Dover Base Housing, Rising Sun-Lebanon
and Rising Sun around 450 PM EST.
Other locations impacted by these severe thunderstorms include
Highland Acres, Felton, Rodney Village, Woodside East, Marydel,
Hillsboro, Wyoming, Little Creek, Kent Acres and Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
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 3866 7612 3906 7598 3911 7583 3918 7540
3884 7566 3883 7572 3868 7579 3871 7584
3868 7594 3865 7597 3864 7611
TIME...MOT...LOC 2143Z 248DEG 43KT 3911 7559 3866 7599
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 25, 3:05 PM EST | Special Weather Statement | PHI | Cecil, Kent, Queen Anne's, Talbot | 55 min |
| Feb 25, 3:18 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 57 min |
| Feb 25, 3:26 PM EST | Severe Thunderstorm Warning | PHI | Cecil | 64 min |
| Feb 25, 4:04 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 41 min |
| Feb 25, 4:50 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 55 min |
| Feb 25, 5:07 PM EST | Special Weather Statement | PHI | Kent | 38 min |
| Feb 25, 4:40 PM EST | Severe Thunderstorm Warning | PHI | Kent, New Castle | 50 min |
| Feb 25, 5:42 PM EST | Special Weather Statement | PHI | New Castle | 33 min |
| Feb 25, 5:45 PM EST | Special Weather Statement | PHI | Sussex | 30 min |
| Feb 25, 5:46 PM EST | Special Weather Statement | PHI | Sussex | 29 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2017Severe Thunderstorm Warnings in Delaware, 2017Every severe thunderstorm warning in 2017
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.