Alert archive / Maryland / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 19, 2013, 8:08 PM EDT for Cecil County, Maryland. It was in force for 52 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
- Apr 19, 2013, 8:08 PM EDT (00:08 UTC)
- Expired
- Apr 19, 2013, 9:00 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 93 km from the middle of the area, began a volume at 00:12 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 19, 8:33 PM EDT | TSTM WND DMG | Elkton, MD | TREES DOWN |
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 19, 2:31 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 136 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
- 118 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
057
WUUS51 KPHI 200008
SVRPHI
MDC015-200100-
/O.NEW.KPHI.SV.W.0010.130420T0008Z-130420T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT FRI APR 19 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CECIL COUNTY IN NORTHEAST MARYLAND...
* UNTIL 900 PM EDT
* AT 805 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 13 MILES SOUTHWEST OF
CECILTON...OR 15 MILES SOUTH OF ABERDEEN...AND MOVING NORTHEAST AT
35 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
HOLLYWOOD BEACH AND CECILTON AROUND 830 PM EDT...
CAYOTS AND BOHEMIAS MILLS AROUND 835 PM EDT...
BRANTWOOD AND ELKTON AROUND 845 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...CLOUD TO GROUND LIGHTNING...AND
BRIEF HEAVY DOWNPOURS. PEOPLE OUTSIDE SHOULD MOVE TO A
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FRIDAY EVENING
FOR NORTHEASTERN MARYLAND.
&&
LAT...LON 3972 7579 3938 7577 3936 7589 3938 7604
3940 7605 3944 7600 3946 7602 3952 7599
3955 7603 3954 7608 3957 7610 3957 7609
3956 7608 3957 7608 3964 7616 3972 7623
TIME...MOT...LOC 0007Z 220DEG 49KT 3933 7605
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 6:09 PM EDT | Frost Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 12 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 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.