Alert archive / New York / Special Weather Statements in 2018

Special Weather Statement, NWS New York, NY

August 8, 2018Westchester County, New York

NWS New York, NY issued this special weather statement at Aug 8, 2018, 8:03 PM EDT for Westchester County, New York. It was in force for 42 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: Aug 8, 2018, 8:03 PM EDT (00:03 UTC)
Expired: Aug 8, 2018, 8:45 PM EDT
In force: 42 min
Issued by: NWS New York, NY

County Westchester County, NY

The radar

The Brookhaven radar (KOKX), 74 km from the middle of the area, began a volume at 00:04 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

Brookhaven, NY (KOKX), launched 00:00Z, 0.1 hours before the alert went out and 74 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: 583 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 New York, NY wrote its last area forecast discussion before this special weather statement went out at Aug 8, 7:47 PM EDT, 16 minutes earlier.

Area forecast discussion, Aug 8, 7:47 PM EDT, 16 minutes before

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Hazardous weather outlook, Aug 8, 7:51 PM EDT, 12 minutes before

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In the hours before

Special weather statement, Aug 8, 5:10 PM EDT, 2 hours 53 minutes before

Special Weather Statement
National Weather Service New York NY
510 PM EDT WED AUG 8 2018

CTZ005-006-010-082200-
Northern Fairfield-Northern New Haven-Southern New Haven-
510 PM EDT WED AUG 8 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN FAIRFIELD AND NEW HAVEN
COUNTIES...

At 509 PM EDT, a strong thunderstorm was located over Southbury,
moving east at 20 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
New Haven, Waterbury, Meriden, Wallingford, Shelton, Naugatuck,
Guilford, Southbury, Wolcott, Durham, Newtown, Hamden, Cheshire,
Branford and North Haven.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4148 7274 4142 7274 4143 7271 4127 7271
      4137 7330 4151 7327 4151 7316 4156 7316
      4157 7294 4156 7295 4156 7288 4155 7287
      4154 7285 4157 7284 4157 7283 4155 7282
      4157 7280 4158 7275
TIME...MOT...LOC 2109Z 274DEG 18KT 4146 7320

PW

Special weather statement, Aug 8, 5:50 PM EDT, 2 hours 13 minutes before

Special Weather Statement
National Weather Service New York NY
550 PM EDT WED AUG 8 2018

CTZ005-006-009-010-NYZ070-082245-
Northern Fairfield-Southern Fairfield-Northern New Haven-Southern New
Haven-Northern Westchester-
550 PM EDT WED AUG 8 2018

...A STRONG THUNDERSTORM WILL AFFECT FAIRFIELD...WESTERN NEW HAVEN
AND NORTHERN WESTCHESTER COUNTIES...

At 549 PM EDT, a strong thunderstorm was located over Redding, or 7
miles southeast of Danbury, moving east at 15 mph.

Winds in excess of 30 mph are possible with this storm.

Another storm was developing over eastern Westchester, moving east
into Fairfield County.

Locations impacted include...
Bridgeport, New Haven, Stamford, Norwalk, Danbury, Milford, Shelton,
Naugatuck, Southbury, New Canaan, Newtown, Fairfield, Stratford,
Trumbull and Westport.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4125 7295 4122 7298 4109 7359 4136 7359
      4137 7355 4139 7354 4147 7333 4147 7331
      4148 7332 4151 7323 4151 7316 4154 7316
      4156 7311
TIME...MOT...LOC 2149Z 257DEG 12KT 4131 7339

PW

Special weather statement, Aug 8, 6:45 PM EDT, 1 hour 18 minutes before

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Special weather statement, Aug 8, 6:51 PM EDT, 1 hour 12 minutes before

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Special weather statement, Aug 8, 7:39 PM EDT, 24 minutes before

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Special weather statement, Aug 8, 8:03 PM EDT, 0 minutes before

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The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 1:32 AM EDT	Special Weather Statement	OKX	Bronx	43 min
Aug 9, 2:15 AM EDT	Special Weather Statement	OKX	Bronx, Nassau	45 min
Aug 9, 2:29 AM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens, Westchester	61 min
Aug 9, 2:44 AM EDT	Special Weather Statement	OKX	Nassau	61 min
Aug 9, 3:02 AM EDT	Special Marine Warning	OKX		58 min
Aug 9, 3:04 AM EDT	Severe Thunderstorm Warning	OKX	Suffolk	41 min
Aug 9, 2:37 AM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Passaic	53 min
Aug 8, 8:38 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	25 min
Aug 9, 1:22 AM EDT	Special Weather Statement	OKX		38 min

Nearby

Special Weather Statements in New York, 2018 Every 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.