Alert archive / Delaware / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2016, 4:30 PM EDT for New Castle County, Delaware; Chester County, Pennsylvania; Cecil County, Maryland. It was in force for 45 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 1, 2016, 4:30 PM EDT (20:30 UTC)
- Expired
- Jul 1, 2016, 5:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cecil County, MD, Chester County, PA
The radar
The Dover AFB radar (KDOX), 105 km from the middle of the area, began a volume at 20:33 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 1, 4:35 PM EDT | TSTM WND DMG | Fair Hill Meadows, MD | NUMEROUS TREES DOWN. POWER LINES DOWNED ALSO. |
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 |
|---|---|---|---|
| Jul 1, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.5 hours before the alert went out and 160 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
- -114 J/kg
- Mixed-layer LCL
- 1086 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
629
WUUS51 KPHI 012030
SVRPHI
DEC003-MDC015-PAC029-012115-
/O.NEW.KPHI.SV.W.0078.160701T2030Z-160701T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 PM EDT FRI JUL 1 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
NORTHEASTERN CECIL COUNTY IN NORTHEASTERN MARYLAND...
SOUTH CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
* UNTIL 515 PM EDT
* AT 430 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BLAKE...OR 8
MILES NORTHWEST OF NEWARK...MOVING EAST AT 20 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.
* LOCATIONS IMPACTED INCLUDE...
NEWARK...BLAKE...ANDORA...KEMBLESVILLE...PIKE CREEK...BARKSDALE...
HOCKESSIN...FAIR HILL...GLEN WESTOVER...LADENBERG...NORTH STAR...
APPLETON...ASHLAND...LOMBARD...STANTON AND BROOKSIDE.
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.
&&
LAT...LON 3968 7595 3976 7595 3982 7563 3965 7564
TIME...MOT...LOC 2030Z 267DEG 17KT 3973 7590
HAIL...1.00IN
WIND...60MPH
$$
AMC2 follow-up statements
402
WWUS51 KPHI 012056
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
456 PM EDT FRI JUL 1 2016
MDC015-PAC029-012105-
/O.CAN.KPHI.SV.W.0078.000000T0000Z-160701T2115Z/
CECIL MD-CHESTER PA-
456 PM EDT FRI JUL 1 2016
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CECIL AND SOUTH
CENTRAL CHESTER COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING IS MOVING OUT OF
THE WARNED AREA, AND THEREFORE THE WARNING HAS BEEN CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
NORTHERN DELAWARE...NORTHEASTERN MARYLAND...AND SOUTHEASTERN
PENNSYLVANIA.
LAT...LON 3972 7578 3976 7575 3980 7571 3982 7563
3965 7564 3970 7579
TIME...MOT...LOC 2055Z 266DEG 16KT 3973 7572
$$
DEC003-012115-
/O.CON.KPHI.SV.W.0078.000000T0000Z-160701T2115Z/
NEW CASTLE DE-
456 PM EDT FRI JUL 1 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN NEW CASTLE COUNTY...
AT 455 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PIKE
CREEK...OR NEAR NEWARK...MOVING EAST AT 20 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.
THIS SEVERE STORM WILL BE NEAR...
HOCKESSIN AROUND 505 PM EDT.
STANTON AND ASHLAND AROUND 510 PM EDT.
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
BROOKSIDE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3972 7578 3976 7575 3980 7571 3982 7563
3965 7564 3970 7579
TIME...MOT...LOC 2055Z 266DEG 16KT 3973 7572
HAIL...1.00IN
WIND...60MPH
$$
GORSE370
WWUS51 KPHI 012107
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
507 PM EDT FRI JUL 1 2016
DEC003-012116-
/O.EXP.KPHI.SV.W.0078.000000T0000Z-160701T2115Z/
NEW CASTLE DE-
507 PM EDT FRI JUL 1 2016
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NEW CASTLE COUNTY
WILL EXPIRE AT 515 PM EDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
NORTHERN DELAWARE...NORTHEASTERN MARYLAND...AND SOUTHEASTERN
PENNSYLVANIA.
LAT...LON 3972 7578 3976 7575 3980 7571 3982 7563
3965 7564 3970 7579
TIME...MOT...LOC 2105Z 267DEG 17KT 3973 7572
$$
GORSEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 5:05 PM EDT | Special Weather Statement | PHI | Sussex | 25 min |
| Jul 1, 2:24 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 66 min |
| Jul 1, 2:47 PM EDT | Special Weather Statement | PHI | Lehigh | 58 min |
| Jul 1, 6:50 PM EDT | Areal Flood Advisory | PHI | Monroe | 4 hr |
| Jul 1, 4:25 PM EDT | Special Weather Statement | PHI | Cecil | 50 min |
| Jul 1, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 43 min |
| Jul 1, 6:29 PM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 4 hr |
| Jul 1, 6:35 PM EDT | Special Weather Statement | PHI | Queen Anne's | 55 min |
| Jul 1, 7:40 PM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 4 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 2016Severe Thunderstorm Warnings in Pennsylvania, 2016Severe Thunderstorm Warnings in Maryland, 2016Every severe thunderstorm warning in 2016
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.