Alert archive / New York / Special Marine Warnings in 2021

Special Marine Warning 49, NWS Buffalo, NY

July 13, 2021

NWS Buffalo, NY issued this special marine warning at Jul 13, 2021, 6:08 PM EDT. It was in force for 52 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
Jul 13, 2021, 6:08 PM EDT (22:08 UTC)
Expired
Jul 13, 2021, 7:00 PM EDT
In force
52 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.0 in
Wind
34.0 mph

The radar

The Buffalo radar (KBUF), 116 km from the middle of the area, began a volume at 22:08 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.1 hours before the alert went out and 114 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
610 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

011 
WHUS51 KBUF 132208
SMWBUF
LOZ043-063-132300-
/O.NEW.KBUF.MA.W.0049.210713T2208Z-210713T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Buffalo NY
608 PM EDT Tue Jul 13 2021

The National Weather Service in Buffalo has issued a

* Special Marine Warning for...
  Lake Ontario Nearshore and out waters from Braddock Bay to Ontario 
  on the Lake...

* Until 700 PM EDT.

* At 607 PM EDT, a strong thunderstorm was located over Ontario
  Beach, or 26 nm west of Sodus Bay, moving northeast at 25 knots.

  HAZARD...Wind gusts 34 knots or greater.

  SOURCE...Radar.

  IMPACT...Small craft could be damaged in briefly higher winds and 
           suddenly higher waves.

* Locations impacted include...
  Irondequoit Bay, Ontario Beach and Ontario On The Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4327 7773 4331 7778 4363 7754 4363 7697
      4362 7696 4324 7732 4320 7756
TIME...MOT...LOC 2207Z 221DEG 26KT 4329 7757 

HAIL...0.00IN
WIND...>34KTS

$$

Welch
1 follow-up statement
020 
FZUS71 KBUF 132251
MWSBUF

Marine Weather Statement
National Weather Service Buffalo NY
651 PM EDT Tue Jul 13 2021

LOZ043-132259-
/O.CAN.KBUF.MA.W.0049.000000T0000Z-210713T2300Z/
651 PM EDT Tue Jul 13 2021

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were...  
Lake Ontario from Nearshore and out 
waters from Braddock Bay to Ontario on the Lake...

The thunderstorm has moved out of the warned area and no longer 
poses a significant threat to boaters.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
the adjacent waters of Lake Ontario.

LAT...LON 4363 7746 4363 7697 4362 7696 4339 7718
TIME...MOT...LOC 2249Z 227DEG 29KT 4352 7719 

$$

LOZ063-132300-
/O.CON.KBUF.MA.W.0049.000000T0000Z-210713T2300Z/
651 PM EDT Tue Jul 13 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 700 PM EDT...

For the following areas...  
Lake Ontario outer waters from Ontario on the Lake to Sodus Bay...

At 650 PM EDT, a strong thunderstorm was located 15 nm northeast of 
Ontario On The Lake, or 17 nm northwest of Sodus Bay, moving 
northeast at 30 knots.

HAZARD...Wind gusts 34 knots or greater.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and 
         suddenly higher waves.

The strong thunderstorm will remain over mainly open waters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.

&&

LAT...LON 4363 7746 4363 7697 4362 7696 4339 7718
TIME...MOT...LOC 2249Z 227DEG 29KT 4352 7719 

HAIL...0.00IN
WIND...>34KTS

$$

Welch

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 3:40 AM EDTSpecial Weather StatementBUFLewis50 min
Jul 13, 1:29 PM EDTSpecial Weather StatementBUFErie46 min
Jul 13, 1:56 PM EDTSpecial Marine WarningBUF64 min
Jul 13, 2:45 PM EDTSpecial Weather StatementBUFMonroe30 min
Jul 13, 3:40 PM EDTSpecial Marine WarningBUF50 min
Jul 13, 4:34 PM EDTSpecial Marine WarningBUF56 min
Jul 13, 4:41 PM EDTSevere Thunderstorm WarningBUFChautauqua64 min
Jul 13, 4:46 PM EDTSpecial Weather StatementBUFWayne44 min
Jul 13, 4:50 PM EDTSevere Thunderstorm WarningBUFOswego55 min
Jul 13, 4:59 PM EDTSpecial Marine WarningBUF46 min
Jul 13, 5:23 PM EDTSevere Thunderstorm WarningBUFOswego45 min
Jul 13, 5:26 PM EDTSpecial Marine WarningBUF64 min
Jul 13, 5:33 PM EDTSpecial Marine WarningBUF42 min
Jul 13, 5:38 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie52 min
Jul 13, 5:41 PM EDTSevere Thunderstorm WarningBUFLewis, Oswego64 min
Jul 13, 5:43 PM EDTSpecial Weather StatementBUFMonroe32 min
Jul 13, 5:57 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus, Chautauqua, Erie, Wyoming63 min
Jul 13, 6:05 PM EDTSpecial Marine WarningBUF55 min
Jul 13, 6:07 PM EDTSpecial Marine WarningBUF38 min
Jul 13, 6:09 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis53 min
Jul 13, 6:19 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Niagara, Orleans41 min
Jul 13, 6:46 PM EDTSpecial Marine WarningBUF89 min
Jul 13, 6:55 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans50 min
Jul 13, 7:02 PM EDTSpecial Marine WarningBUF58 min
Jul 13, 7:05 PM EDTSpecial Weather StatementBUFJefferson25 min
Jul 13, 7:07 PM EDTSpecial Marine WarningBUF53 min
Jul 13, 7:15 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wayne60 min
Jul 13, 7:27 PM EDTSpecial Marine WarningBUF93 min
Jul 13, 7:41 PM EDTSpecial Marine WarningBUF94 min

Nearby

Special Marine Warnings in New York, 2021Every special marine warning in 2021

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.