Aug.7, 2013 - mini tornado outbreak / severe thunderstorms

[tice23]

Looks like a patch of severe weather could hit us tommorow evening. There is a good level of shear present in the later hours as well as free convection. MLCAPE values are up but nothing crazy. I think around 7-10pm will be the hours to watch. I think most of the excitement will still be south of the border because of the short window of opportunity but fingers crossed anyway.

[Thunderbolt]

I hope something develops in northeastern Ontario.

I'm going down to London from the 9th to the 11th. Hope I see some storms!

[SlideShowBob]

I would like to see some good storms Wednesday. One of my boys was born on August 7th during a thunderstorm.

Easy to remember his birthday...on the anniversary of the Woodstock tornado of '79.

[tice23]

Some early activity for today

Watches are up for southern ontario:

Rodney - Shedden - Western Elgin County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Rodney - Shedden - Western Elgin County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

St. Thomas - Aylmer - Eastern Elgin County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
St. Thomas - Aylmer - Eastern Elgin County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Stratford - Mitchell - Southern Perth County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Stratford - Mitchell - Southern Perth County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Goderich - Bluewater - Southern Huron County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Goderich - Bluewater - Southern Huron County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Listowel - Milverton - Northern Perth County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Listowel - Milverton - Northern Perth County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Wingham - Blyth - Northern Huron County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Wingham - Blyth - Northern Huron County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Strathroy - Komoka - Western Middlesex County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Strathroy - Komoka - Western Middlesex County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

London - Parkhill - Eastern Middlesex County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
London - Parkhill - Eastern Middlesex County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Woodstock - Tillsonburg - Oxford County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Woodstock - Tillsonburg - Oxford County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Sarnia - Petrolia - Western Lambton County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Sarnia - Petrolia - Western Lambton County continued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Watford - Pinery Park - Eastern Lambton County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Watford - Pinery Park - Eastern Lambton County continued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Kitchener - Cambridge - Region of Waterloo
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Kitchener - Cambridge - Region of Waterloo issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Mount Forest - Arthur - Northern Wellington County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Mount Forest - Arthur - Northern Wellington County issued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Watches
Windsor - Leamington - Essex County
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Windsor - Leamington - Essex County continued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

Chatham-Kent - Rondeau Park
9:16 AM EDT Wednesday 07 August 2013
Severe thunderstorm watch for
Chatham-Kent - Rondeau Park continued

Severe thunderstorms possible this morning.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

At 9:00 AM radar shows a line of thunderstorms extending from near Goderich to just east of Lake St Clair. These storms are moving eastward at 60 km/h. Isolated thunderstorms are also developing ahead of this line. Furthermore, strong storms are observed over southern lower Michigan.

There is the risk that a few of storms could locally reach severe limits with isolated wind gusts to 90 km/h as they move eastward across portions of the above regions. Torrential downpours,hail, and frequent cloud to ground lightning are also associated.

[Thunderbolt]

Severe thunderstorm watch issued in northeastern Ontario

WWCN12 CWTO 071513
SEVERE WEATHER BULLETIN
ISSUED BY ENVIRONMENT CANADA
AT 11:13 AM EDT WEDNESDAY 7 AUGUST 2013.
---------------------------------------------------------------------
WATCHES/WARNINGS IN EFFECT FOR NORTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH FOR:
=NEW= GREATER SUDBURY AND VICINITY
=NEW= KIRKLAND LAKE - NEW LISKEARD - TEMAGAMI
=NEW= MANITOULIN ISLAND
=NEW= ESPANOLA - KILLARNEY
=NEW= NORTH BAY - WEST NIPISSING.

SEVERE THUNDERSTORM POTENTIAL THIS AFTERNOON.

THIS IS AN ALERT TO THE POTENTIAL DEVELOPMENT OF SEVERE
THUNDERSTORMS WITH LARGE HAIL, DAMAGING WINDS OR HEAVY
RAINFALL..MONITOR WEATHER CONDITIONS AND LISTEN FOR UPDATED
BULLETINS.

---------------------------------------------------------------------
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS ALONG
AND AHEAD OF A COLD FRONT LOCATED WEST OF SUDBURY. THE COLD FRONT IS
EXPECTED TO REACH NORTH BAY BY THIS EVENING.

THERE IS POTENTIAL FOR SOME OF THESE THUNDERSTORMS TO BECOME SEVERE
WITH DAMAGING WINDS, LARGE HAIL AND TORRENTIAL DOWNPOURS BEING THE
MAIN THREATS. FREQUENT CLOUD TO GROUND LIGHTNING MAY ALSO BE
ASSOCIATED AND AN ISOLATED TORNADO CANNOT BE RULED OUT.

REFER TO YOUR LOCAL PUBLIC FORECAST FOR FURTHER DETAILS.

END/OSPC

WHCN19 CWTO 071510
MARINE WARNING
FOR LAKE OF THE WOODS LAKE NIPIGON NORTH CHANNEL LAKE NIPISSING AND
LAKE SIMCOE ISSUED BY ENVIRONMENT CANADA AT 11:10 A.M. EDT WEDNESDAY
7 AUGUST 2013.
---------------------------------------------------------------------
FOR IMMEDIATE BROADCAST

SQUALL WATCH FOR:
=NEW= NORTH CHANNEL
=NEW= LAKE NIPISSING
=NEW= LAKE SIMCOE.

IN EFFECT FROM 11:30 A.M. TO 7:00 P.M.

---------------------------------------------------------------------
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS ALONG
AND AHEAD OF A COLD FRONT STRETCHING FROM NORTH OF LAKE HURON TO
SOUTHERN LAKE MICHIGAN. THE COLD FRONT IS EXPECTED TO LIE FROM NORTH
BAY TO WINDSOR BY THIS EVENING.

THERE IS POTENTIAL FOR SOME OF THESE THUNDERSTORMS TO PRODUCE VERY
STRONG WIND GUSTS TO 50 KNOTS. LARGE HAIL, FREQUENT LIGHTNING AND
LOW VISIBILITIES IN TORRENTIAL DOWNPOURS MAY ALSO BE ASSOCIATED.

MARINERS ARE ADVISED TO MONITOR THIS MARINE WARNING FOR THE MOST
CURRENT INFORMATION.

END/OSPC

[WayfaringStranger]

Sorry I'm a bit late posting this, but I just got to my computer.
Special weather statement has now ended

WOCN11 CWTO 071532
SPECIAL WEATHER STATEMENT ISSUED BY ENVIRONMENT CANADA AT 11:32 AM
EDT WEDNESDAY 7 AUGUST 2013.
---------------------------------------------------------------------
SPECIAL WEATHER STATEMENT FOR:
ELGIN.

RISK OF VERY WEAK TORNADO.

---------------------------------------------------------------------
SPECIAL WEATHER STATEMENT ENDED FOR:
WINDSOR - ESSEX - CHATHAM-KENT
SARNIA - LAMBTON
LONDON - MIDDLESEX
OXFORD - BRANT
HURON - PERTH.

---------------------------------------------------------------------
==DISCUSSION==
AT 11:10 AM RADAR SHOWS A POSSIBLE WATERSPOUT JUST OFF SHORE NEAR
PORT BRUCE. THERE IS THE RISK THAT THIS COULD COME ON ONSHORE AS A
VERY WEAK TORNADO. PLEASE MONITOR WEATHER CONDITIONS CLOSELY.

THE PUBLIC IS ADVISED TO MONITOR FUTURE FORECASTS AND WARNINGS AS
WARNINGS MAY BE REQUIRED OR EXTENDED.

PLEASE MONITOR THE LATEST FORECASTS AND WARNINGS FROM ENVIRONMENT
CANADA AT WWW.WEATHEROFFICE.GC.CA

END

[tice23]

Here is the SPC's forcast for significant tornadoes for today, nothing crazy but it does cover a larger area. EC does mention the threat of a tornado east of georgian bay in their watch all the way to ottawa...hey wait i'm barely east of georgian bay... . i can see the wind shear today is already considerable and expected to increase as the system moves in. If the free convection numbers drop enough in the next 3-6 hours we could see some fun, particularly near collingwood and eastward.

[OAPEC]

In reference to the special weather statement posted... There has been some significant tree and powerline damage from just east of the village of Sparta, southeastward to Port Bruce... i haven't seen the radar from the time frame (10:30am) to see if there was rotation in this area...

[JohnCyr]

Tornado warning and funnel sspottd nesr haliburton area and peterborough apparently! Not much going on in Ottawa so far...

[tice23]

radar showing some rotation in most of the cells in that line, Got a couple of pics as these storms at 4:30 from the behind them. nice cauliflowers will post tonight