Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

August 21, 2011Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 21, 2011, 12:20 PM EDT for Morris County, New Jersey. It was in force for 55 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: Aug 21, 2011, 12:20 PM EDT (16:20 UTC)
Expired: Aug 21, 2011, 1:15 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 16:23 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
Aug 21, 12:45 PM EDT	TSTM WND DMG	Lake Hiawatha, NJ	LARGE TREE BRANCHES BROKEN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 4.3 hours before the alert went out and 128 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 874 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 857 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

117 
WWUS81 KPHI 211620
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1220 PM EDT SUN AUG 21 2011

NJZ008-211715-
MORRIS NJ-
1220 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT MORRIS COUNTY...

AT 1219 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHWEST OF MORRISTOWN...MOVING
NORTHEAST AT 30 MPH. THE THUNDERSTORM WILL BE NEAR MORRISTOWN...
MADISON...CHATHAM AROUND 1230 PM...HANOVER TOWNSHIP...FLORHAM PARK...
MORRIS PLAINS...ROCKAWAY AROUND 1235 PM...EAST HANOVER...PARSIPPANY
AND MOUNTAIN LAKES AROUND 1240 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO 
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. DO NOT SEEK SHELTER 
UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A 
THUNDERSTORM APPROACHES.

LAT...LON 4089 7427 4089 7433 4086 7431 4078 7437
      4074 7436 4067 7446 4069 7451 4074 7456
      4074 7464 4103 7443 4099 7429 4097 7427
      4092 7428

$$

ROBERTSON

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 21, 3:24 AM EDT	Small Craft Advisory	PHI		30 hr
Aug 21, 3:28 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 6 more	17 hr
Aug 21, 8:41 AM EDT	Special Weather Statement	PHI	Salem	64 min
Aug 21, 10:33 AM EDT	Special Marine Warning	PHI		57 min
Aug 21, 11:07 AM EDT	Special Marine Warning	PHI		83 min
Aug 21, 12:33 PM EDT	Severe Thunderstorm Warning	PHI	Morris	33 min
Aug 21, 12:39 PM EDT	Special Weather Statement	PHI	Burlington, Camden	66 min
Aug 21, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	58 min
Aug 21, 2:33 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer	117 min
Aug 21, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer	62 min
Aug 21, 3:08 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	67 min
Aug 21, 3:21 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	54 min
Aug 21, 3:22 PM EDT	Special Marine Warning	PHI		83 min
Aug 21, 3:46 PM EDT	Flash Flood Warning	PHI	Burlington	2 hr
Aug 21, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Aug 21, 4:26 PM EDT	Special Marine Warning	PHI		57 min
Aug 21, 4:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean	3 hr
Aug 21, 5:44 PM EDT	Special Weather Statement	PHI	Mercer	61 min
Aug 21, 6:05 PM EDT	Flash Flood Warning	PHI	Burlington	6 hr
Aug 21, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	63 min
Aug 21, 6:20 PM EDT	Special Weather Statement	PHI	Hunterdon	55 min
Aug 21, 6:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	111 min
Aug 21, 7:08 PM EDT	Special Weather Statement	PHI	Hunterdon, Middlesex, Somerset	52 min
Aug 21, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	42 min
Aug 21, 7:21 PM EDT	Special Marine Warning	PHI		84 min
Aug 21, 7:24 PM EDT	Flash Flood Warning	PHI	Mercer, Monmouth, Ocean	5 hr
Aug 21, 7:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	115 min
Aug 21, 1:11 PM EDT	Special Weather Statement	PHI	Montgomery	64 min
Aug 21, 1:25 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	110 min
Aug 21, 3:31 PM EDT	Flash Flood Warning	PHI	Philadelphia	8 hr
Aug 21, 4:11 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	64 min
Aug 21, 4:19 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Aug 21, 4:53 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	67 min
Aug 21, 6:41 PM EDT	Special Weather Statement	PHI	Berks	64 min
Aug 21, 8:01 AM EDT	Special Weather Statement	PHI	Cecil, Kent	59 min
Aug 21, 9:08 AM EDT	Special Weather Statement	PHI	Cecil, Kent	52 min
Aug 21, 9:36 AM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	2 hr
Aug 21, 2:01 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	59 min
Aug 21, 2:43 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	3 hr
Aug 21, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	65 min
Aug 21, 3:11 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	2 hr
Aug 21, 4:03 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	57 min
Aug 21, 4:45 PM EDT	Flash Flood Warning	PHI	Kent	3 hr
Aug 21, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	37 min
Aug 21, 5:20 PM EDT	Areal Flood Advisory	PHI	Caroline, Queen Anne's, Talbot	115 min
Aug 21, 7:17 PM EDT	Areal Flood Advisory	PHI	Caroline	118 min
Aug 21, 9:19 AM EDT	Special Weather Statement	PHI	Kent	56 min
Aug 21, 10:15 AM EDT	Special Weather Statement	PHI	Kent	60 min
Aug 21, 10:33 AM EDT	Severe Thunderstorm Warning	PHI	Kent	57 min
Aug 21, 6:29 PM EDT	Special Weather Statement	PHI	Sussex	61 min
Aug 21, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	42 min

Nearby

Special Weather Statements in New Jersey, 2011 Every special weather statement in 2011

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.