Alert archive / Pennsylvania / Special Weather Statements in 2018
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Apr 16, 2018, 12:04 PM EDT for Chester County, Pennsylvania; Cecil County, Maryland. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 2018, 12:04 PM EDT (16:04 UTC)
- Expired
- Apr 16, 2018, 12:30 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Cecil County, MD, Chester County, PA
The radar
The Dover AFB radar (KDOX), 123 km from the middle of the area, began a volume at 16:07 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 4.1 hours before the alert went out and 165 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
- 581 m above ground
- 0-6 km bulk shear
- 112 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this special weather statement went out at Apr 16, 10:53 AM EDT, 1 hour 11 minutes earlier.
Area forecast discussion, Apr 16, 10:53 AM EDT, 1 hour 11 minutes before
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</html>Hazardous weather outlook, Apr 16, 10:47 AM EDT, 1 hour 17 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 1047 AM EDT Mon Apr 16 2018 NJZ001-007>010-PAZ054-055-060>062-101>105-171500- Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-Lehigh- Northampton-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks- 1047 AM EDT Mon Apr 16 2018 ...FLASH FLOOD WATCH IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern New Jersey, northwest New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ008-012-015-019-020-171500- Cecil-Kent MD-Queen Annes-Talbot-Caroline- 1047 AM EDT Mon Apr 16 2018 This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...Today and Tonight. Some spotty minor flooding will occur this morning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NJZ015-017>019-PAZ070-071-106-171500- Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Lower Bucks- 1047 AM EDT Mon Apr 16 2018 ...FLASH FLOOD WATCH IN EFFECT UNTIL 6 PM EDT THIS EVENING... ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 3 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for central New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. DEZ001-NJZ016-171500- New Castle-Salem- 1047 AM EDT Mon Apr 16 2018 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for northern Delaware and southern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. DEZ002>004-NJZ013-014-020>027-171500- Kent-Inland Sussex-Delaware Beaches-Western Monmouth- Eastern Monmouth-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 1047 AM EDT Mon Apr 16 2018 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for central Delaware, southern Delaware, central New Jersey and southern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NJZ012-171500- Middlesex- 1047 AM EDT Mon Apr 16 2018 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON... ...FLASH FLOOD WATCH IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Warning. Flash Flood Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ430-431-450>455-171500- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 1047 AM EDT Mon Apr 16 2018 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Apr 16, 9:43 AM EDT, 2 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
943 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0730 AM FLASH FLOOD PHILADELPHIA 39.96N 75.14W
04/16/2018 PHILADELPHIA PA EMERGENCY MNGR
RESCUES AND STUCK VEHICLES REPORTED IN THE AREA OF
COBBS CREEK. COBBS CREEK EXCEEDED ITS FLOOD STAGE OF 7
FEET AT 730 AM AND CRESTED AT 7.09 FEET BEFORE QUICKLY
FALLING BACK BELOW FLOOD STAGE BY 8 AM.
&&
EVENT NUMBER PHI1800613
MEOLALocal storm report, Apr 16, 10:06 AM EDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1006 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 AM FLOOD PHILADELPHIA 39.96N 75.14W
04/16/2018 PHILADELPHIA PA EMERGENCY MNGR
FLOODING REPORTED ON INTERSTATE 95 AT THE ON RAMP NEAR
FRONT AND MARKET STREETS.
&&
EVENT NUMBER PHI1800614
JRKLocal storm report, Apr 16, 10:10 AM EDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1010 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0945 AM FLOOD SOUTH BRUNSWICK 40.40N 74.54W
04/16/2018 MIDDLESEX NJ LAW ENFORCEMENT
ROUTE 1 SOUTHBOUND CLOSED DUE TO FLOODING ON THE
ROADWAY.
&&
EVENT NUMBER PHI1800616
MEOLALocal storm report, Apr 16, 10:39 AM EDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1039 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 AM COASTAL FLOOD ATLANTIC CITY 39.36N 74.45W
04/16/2018 ATLANTIC NJ NEWSPAPER
WESTBOUND FAIRMONT AVENUE CLOSED AT TEXAS AVENUE DUE TO
FLOODING.
&&
EVENT NUMBER PHI1800617
MEOLALocal storm report, Apr 16, 11:20 AM EDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1120 AM EDT MON APR 16 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0951 AM FLOOD PLAINSBORO 40.33N 74.60W
04/16/2018 MIDDLESEX NJ LAW ENFORCEMENT
MAPLETON ROAD BETWEEN SEMINARY DRIVE/BARCLAY BLVD AND
LAKEVIEW TERRACE CLOSED DUE TO FLOODING.
&&
EVENT NUMBER PHI1800618
MEOLASpecial weather statement, Apr 16, 12:04 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1204 PM EDT MON APR 16 2018
DEZ001-MDZ008-PAZ101-102-161630-
New Castle-Cecil-Western Chester-Eastern Chester-
1204 PM EDT MON APR 16 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN NEW CASTLE...
NORTHEASTERN CECIL AND SOUTHWESTERN CHESTER COUNTIES...
At 1201 PM EDT, a strong thunderstorm was located over Elkton,
moving north at 40 mph.
Winds up to 40 mph, brief heavy downpours and pea size hail are
possible with this storm.
This storm will be near...
Andora and Fair Hill around 1205 PM EDT.
Newark, Glen Westover, Appleton, Blake and Lombard around 1210 PM
EDT.
Kemblesville, Ladenberg and Pike Creek around 1215 PM EDT.
West Grove, North Star, Hockessin and Ashland around 1220 PM EDT.
Kennett Square and Cochranville around 1225 PM EDT.
Coatesville and Marshallton around 1230 PM EDT.
Although cloud to ground lightning has not yet been detected,
lightning strikes may develop shortly with this storm showing signs
of strengthening. Lightning can strike 10 miles away from a
thunderstorm. Seek a safe shelter inside a building or vehicle.
LAT...LON 4001 7595 4005 7593 4001 7555 3949 7578
3954 7594 3982 7597 3993 7599 3994 7598
3995 7600
TIME...MOT...LOC 1601Z 188DEG 36KT 3964 7583
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 12:32 AM EDT | Winter Weather Advisory | PHI | Sussex | 8 hr |
| Apr 16, 5:20 AM EDT | Special Marine Warning | PHI | 55 min | |
| Apr 16, 5:34 AM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 4 hr |
| Apr 16, 5:52 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer | 7 hr |
| Apr 16, 6:07 AM EDT | Special Marine Warning | PHI | 53 min | |
| Apr 16, 6:30 AM EDT | Areal Flood Advisory | PHI | Hunterdon | 4 hr |
| Apr 16, 6:45 AM EDT | Special Weather Statement | PHI | Cape May, Cumberland | 45 min |
| Apr 16, 6:49 AM EDT | Special Marine Warning | PHI | 86 min | |
| Apr 16, 7:04 AM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 4 hr |
| Apr 16, 7:26 AM EDT | Special Weather Statement | PHI | Camden, Gloucester, Mercer | 34 min |
| Apr 16, 7:49 AM EDT | Special Marine Warning | PHI | 116 min | |
| Apr 16, 8:13 AM EDT | Special Marine Warning | PHI | 62 min | |
| Apr 16, 8:28 AM EDT | Special Weather Statement | PHI | Middlesex, Monmouth, Morris, Somerset, Sussex, Warren | 47 min |
| Apr 16, 9:08 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean and 1 more | 4 hr |
| Apr 16, 9:26 AM EDT | Areal Flood Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more | 4 hr |
| Apr 16, 1:18 PM EDT | Coastal Flood Advisory | PHI | Middlesex, Monmouth, Ocean | 13 hr |
| Apr 16, 1:31 PM EDT | Areal Flood Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 2 more | 4 hr |
| Apr 16, 2:45 PM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer | 3 hr |
| Apr 16, 3:52 PM EDT | Small Craft Advisory | PHI | 44 hr | |
| Apr 16, 4:46 PM EDT | River Flood Warning | PHI | Somerset | 28 hr |
| Apr 16, 5:27 PM EDT | Areal Flood Warning | PHI | Somerset | 8 hr |
| Apr 16, 7:45 AM EDT | River Flood Warning | PHI | Delaware | 4 hr |
| Apr 16, 8:44 AM EDT | Areal Flood Warning | PHI | Philadelphia | 2 hr |
| Apr 16, 10:45 AM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Apr 16, 11:41 AM EDT | River Flood Warning | PHI | Bucks | 12 hr |
| Apr 16, 2:27 PM EDT | Areal Flood Warning | PHI | Montgomery, Philadelphia | 5 hr |
| Apr 16, 4:55 AM EDT | Special Weather Statement | PHI | Kent, New Castle | 50 min |
| Apr 16, 6:04 AM EDT | Special Weather Statement | PHI | Kent, Sussex | 26 min |
| Apr 16, 3:45 AM EDT | Special Weather Statement | PHI | Kent, Queen Anne's, Talbot | 30 min |
| Apr 16, 3:56 AM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's, Talbot | 24 min |
| Apr 16, 4:23 AM EDT | Special Weather Statement | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 37 min |
| Apr 16, 4:38 AM EDT | Areal Flood Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 4 hr |
Nearby
Special Weather Statements in Pennsylvania, 2018Special Weather Statements in Maryland, 2018Every special weather statement in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.