Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 25, 2017, 6:26 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 49 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
- May 25, 2017, 6:26 PM EDT (22:26 UTC)
- Expired
- May 25, 2017, 7:15 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 22:27 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 |
|---|---|---|---|
| May 25, 6:45 PM EDT | HAIL 0.75 | 2 N Centreville, MD | |
| May 25, 6:49 PM EDT | TSTM WND DMG | Cordova, MD | SEVERAL MEDIUM TO LARGE TREES SNAPPED OR UPROOTED |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.4 hours before the alert went out and 109 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 532 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 291 m²/s²
- 0-3 km storm-relative helicity
- 365 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
466
WUUS51 KPHI 252226
SVRPHI
DEC001-005-MDC011-029-035-041-252315-
/O.NEW.KPHI.SV.W.0032.170525T2226Z-170525T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
626 PM EDT THU MAY 25 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
Southwestern Kent County in central Delaware...
Talbot County in eastern Maryland...
Central Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Southwestern Kent County in northeastern Maryland...
* Until 715 PM EDT
* At 625 PM EDT, severe thunderstorms were located along a line
extending from Talbot to near Trappe, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Romancoke,
Federalsburg, Greensboro, Oakland, Ridgely, Rock Hall, Trappe, St.
Michaels, Preston, Oxford, Goldsboro, Queen Anne, Smithville, Old
Town and Grasonville.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3901 7620 3918 7627 3911 7587 3884 7550
3866 7573 3870 7590 3858 7605 3868 7621
3876 7622 3871 7627 3878 7629 3875 7635
3886 7626 3879 7620 3879 7619 3896 7625
3891 7624 3884 7637 3885 7638
TIME...MOT...LOC 2225Z 212DEG 26KT 3882 7631 3863 7601
HAIL...0.88IN
WIND...60MPH
$$
JRK2 follow-up statements
351
WWUS51 KPHI 252245
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
645 PM EDT THU MAY 25 2017
DEC001-005-MDC011-029-035-041-252315-
/O.CON.KPHI.SV.W.0032.000000T0000Z-170525T2315Z/
Sussex DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
645 PM EDT THU MAY 25 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHWESTERN SUSSEX...SOUTHWESTERN KENT...NORTHEASTERN TALBOT...
CENTRAL QUEEN ANNE'S...CAROLINE AND SOUTHWESTERN KENT COUNTIES...
At 644 PM EDT, severe thunderstorms were located along a line
extending from near Grasonville to near Preston, moving northeast at
30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Easton, Centerville, Denton, Centreville, Federalsburg, Greensboro,
Oakland, Ridgely, Preston, Goldsboro, Queen Anne, Smithville, Old
Town, Grasonville, Starr, Jumptown, Agner, Choptank, Andrewsville and
Tanyard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3866 7595 3888 7622 3896 7625 3891 7624
3890 7625 3893 7629 3901 7620 3908 7623
3916 7618 3911 7587 3884 7550 3866 7573
3870 7590
TIME...MOT...LOC 2244Z 209DEG 25KT 3892 7617 3872 7595
HAIL...0.75IN
WIND...60MPH
$$
JRK852
WWUS51 KPHI 252314
SVSPHI
(
WWUS51 KPHI 000000
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
714 PM EDT THU MAY 25 2017
DEC001-005-MDC011-029-035-041-252324-
/O.EXP.KPHI.SV.W.0032.000000T0000Z-170525T2315Z/
Sussex DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
714 PM EDT THU MAY 25 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX...
SOUTHWESTERN KENT...NORTHEASTERN TALBOT...CENTRAL QUEEN ANNE'S...
CAROLINE AND SOUTHWESTERN KENT COUNTIES WILL EXPIRE AT 715 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.
LAT...LON 3866 7595 3888 7622 3896 7625 3891 7624
3890 7625 3893 7629 3901 7620 3908 7623
3916 7618 3911 7587 3884 7550 3866 7573
3870 7590
TIME...MOT...LOC 2314Z 212DEG 26KT 3908 7604 3888 7582
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 42 min |
| May 25, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 51 min |
| May 25, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 49 min |
| May 25, 5:29 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 2 hr |
| May 25, 6:48 PM EDT | Special Weather Statement | PHI | Sussex | 27 min |
| May 25, 7:13 PM EDT | Special Weather Statement | PHI | Kent | 32 min |
| May 25, 7:49 PM EDT | Special Weather Statement | PHI | New Castle | 26 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.