Alert archive / Connecticut / Tornado Warnings in 2017

Tornado Warning 1, NWS New York, NY

May 31, 2017Greater Bridgeport Planning Region, Connecticut

NWS New York, NY issued this tornado warning at May 31, 2017, 7:17 PM EDT for Greater Bridgeport Planning Region, Connecticut. It was in force for 28 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: May 31, 2017, 7:17 PM EDT (23:17 UTC)
Expired: May 31, 2017, 7:45 PM EDT
In force: 28 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Greater Bridgeport Planning Region, CT

The radar

The Brookhaven radar (KOKX), 97 km from the middle of the area, began a volume at 23:20 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 12:00Z, 11.3 hours before the alert went out and 97 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: 71 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 434 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

973 
WFUS51 KOKX 312317
TOROKX
CTC001-312345-
/O.NEW.KOKX.TO.W.0001.170531T2317Z-170531T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New York NY
717 PM EDT WED MAY 31 2017

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
  North central Fairfield County in southern Connecticut...

* Until 745 PM EDT
    
* At 716 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Hopewell Junction, or 7 miles northwest of
  Pawling, moving east at 30 mph.

  HAZARD...Tornado and golf ball size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Sherman around 735 PM EDT. 
  New Fairfield around 740 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4165 7349 4164 7350 4153 7345 4150 7345
      4151 7353 4165 7352 4166 7352
TIME...MOT...LOC 2316Z 282DEG 26KT 4162 7372 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

JC

2 follow-up statements

466 
WWUS51 KOKX 312331
SVSOKX

Severe Weather Statement
National Weather Service New York NY
731 PM EDT WED MAY 31 2017

CTC001-312345-
/O.CON.KOKX.TO.W.0001.000000T0000Z-170531T2345Z/
Fairfield CT-
731 PM EDT WED MAY 31 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR NORTH
CENTRAL FAIRFIELD COUNTY...
    
At 730 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Pawling, moving east at 30 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Sherman around 735 PM EDT. 
  New Fairfield around 740 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4165 7349 4164 7350 4153 7345 4150 7345
      4151 7353 4165 7352 4166 7352
TIME...MOT...LOC 2330Z 282DEG 26KT 4160 7358 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

JC

668 
WWUS51 KOKX 312343
SVSOKX

Severe Weather Statement
National Weather Service New York NY
743 PM EDT WED MAY 31 2017

CTC001-312353-
/O.EXP.KOKX.TO.W.0001.000000T0000Z-170531T2345Z/
Fairfield CT-
743 PM EDT WED MAY 31 2017

...THE TORNADO WARNING FOR NORTH CENTRAL FAIRFIELD COUNTY WILL EXPIRE
AT 745 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.

LAT...LON 4165 7349 4164 7350 4153 7345 4150 7345
      4151 7353 4165 7352 4166 7352
TIME...MOT...LOC 2343Z 282DEG 26KT 4158 7348 

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:52 PM EDT	Special Weather Statement	OKX		38 min

Nearby

Tornado Warnings in Connecticut, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.