Alert archive / Maryland / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 20, 2013, 10:17 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware. It was in force for 58 min. 1 report 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
- Jul 20, 2013, 10:17 PM EDT (02:17 UTC)
- Expired
- Jul 20, 2013, 11:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 02:20 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 |
|---|---|---|---|
| Jul 20, 10:22 PM EDT | TSTM WND DMG | Still Pond, MD | TREES DOWN |
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 00:00Z, 2.3 hours before the alert went out and 127 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
- 2416 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1423 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
849
WUUS51 KPHI 210217
SVRPHI
DEC001-003-MDC015-029-035-210315-
/O.NEW.KPHI.SV.W.0078.130721T0217Z-130721T0315Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1017 PM EDT SAT JUL 20 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
NORTHERN KENT COUNTY IN NORTHEAST MARYLAND...
NORTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
* UNTIL 1115 PM EDT
* AT 1012 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR NEWTOWN...MOVING EAST AT 25
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...
KENNEDYVILLE AND MORGNEC AROUND 1025 PM EDT...
CRUMPTON AROUND 1035 PM EDT...
CECILTON AROUND 1040 PM EDT...
MASSEY AND MILLINGTON AROUND 1045 PM EDT...
SASSAFRAS AROUND 1050 PM EDT...
DELANEY CORNER AROUND 1055 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.
&&
LAT...LON 3934 7617 3934 7615 3938 7611 3938 7606
3939 7605 3943 7557 3915 7558 3920 7618
TIME...MOT...LOC 0216Z 270DEG 23KT 3929 7608
$$
FORECASTER: HEAVENER1 follow-up statement
570
WWUS51 KPHI 210307
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1107 PM EDT SAT JUL 20 2013
DEC001-003-MDC015-029-035-210317-
/O.EXP.KPHI.SV.W.0078.000000T0000Z-130721T0315Z/
NEW CASTLE DE-CECIL MD-KENT MD-KENT DE-QUEEN ANNE'S MD-
1107 PM EDT SAT JUL 20 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S...
NORTHWESTERN KENT...NORTHERN KENT...SOUTHEASTERN CECIL AND
SOUTHWESTERN NEW CASTLE COUNTIES WILL EXPIRE AT 1115 PM EDT...
THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 3934 7617 3934 7615 3938 7611 3938 7606
3939 7605 3943 7557 3915 7558 3920 7618
TIME...MOT...LOC 0307Z 270DEG 23KT 3929 7566
$$
FORECASTER: HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:56 PM EDT | Special Weather Statement | PHI | Cecil | 64 min |
| Jul 20, 9:44 PM EDT | Special Weather Statement | PHI | Kent | 61 min |
| Jul 20, 10:55 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent | 3 hr |
| Jul 20, 11:25 PM EDT | Special Weather Statement | PHI | Kent | 65 min |
| Jul 21, 3:44 PM EDT | Special Weather Statement | PHI | Cecil | 2 hr |
| Jul 21, 4:35 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 85 min |
| Jul 21, 4:36 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 84 min |
| Jul 21, 3:17 PM EDT | Special Weather Statement | PHI | Sussex | 58 min |
| Jul 21, 4:25 PM EDT | Special Weather Statement | PHI | Sussex | 95 min |
| Jul 21, 4:50 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Jul 21, 4:58 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jul 21, 5:45 PM EDT | Special Weather Statement | PHI | Sussex | 60 min |
| Jul 21, 6:28 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 3 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2013Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.