Tue. Sep.4 - Storms today

[DarkSky]

Some nice big reds on radar passing through NE of Toronto right now. Not only would today be the first storm day in a long time (for here in St. Catharines at least, but many other areas I'm sure), but also the first day of RAIN in who knows how long. Truthfully I cannot remember the last time it rained. I know maybe 1-2 weeks ago we had some, and it was probably a month before that that our 2nd last time of rain occurred.

The one good thing is that you don't have to mow the lawns!

But hopefully it'll be more than rain and Mother Nature can jog my memory of what a thunderstorm is like.

[DarkSky]

703 
 WWCN11 CWTO 041643
 SEVERE WEATHER BULLETIN
 ISSUED BY ENVIRONMENT CANADA
 AT 12:43 PM EDT TUESDAY 4 SEPTEMBER 2012.
 ---------------------------------------------------------------------
 WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH FOR:
       CITY OF TORONTO
       WINDSOR - ESSEX - CHATHAM-KENT
       SARNIA - LAMBTON
       ELGIN
       LONDON - MIDDLESEX
       SIMCOE - DELHI - NORFOLK
       DUNNVILLE - CALEDONIA - HALDIMAND
       OXFORD - BRANT
       NIAGARA
       CITY OF HAMILTON
       HALTON - PEEL
       YORK - DURHAM
       HURON - PERTH
       WATERLOO - WELLINGTON
       DUFFERIN - INNISFIL
       BELLEVILLE - QUINTE - NORTHUMBERLAND
       KINGSTON - PRINCE EDWARD
       PETERBOROUGH - KAWARTHA LAKES
       STIRLING - TWEED - SOUTH FRONTENAC
       BANCROFT - BON ECHO PARK
       BROCKVILLE - LEEDS AND GRENVILLE
       SMITHS FALLS - LANARK - SHARBOT LAKE
       RENFREW - PEMBROKE - BARRY'S BAY.

      HEAVY DOWNPOURS POSSIBLE 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.

---------------------------------------------------------------------
 WATCHES/WARNINGS ENDED FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WARNING ENDED FOR:
       CITY OF TORONTO
       MISSISSAUGA - BRAMPTON
       CALEDON
       VAUGHAN - RICHMOND HILL - MARKHAM.

      THE THUNDERSTORM WHICH TRACKED NORTHWEST OF TORONTO HAS
       WEAKENED CONSIDERABLY IN THE LAST 30 MINUTES.  THERE WERE
       LOCALIZED REPORTS RANGING FROM 30 TO 50 MM OVER A SHORT
       DURATION WITH THIS THUNDERSTORM.

---------------------------------------------------------------------
 ==DISCUSSION==
 A SLOW MOVING COLD FRONT IS PRODUCING SHOWERS AND THUNDERSTORMS OVER
 A LARGE SWATH OF SOUTHERN ONTARIO.  THE AIRMASS IS QUITE UNSTABLE AND
 A NUMBER OF THE MORE INTENSE THUNDERSTORMS ARE CAPABLE OF PRODUCING
 HEAVY DOWNPOURS WITH RAINFALL AMOUNTS OF 50 MM IN ONE HOUR.

END/OSPC

Update: Most areas now changed to rainfall warning. We're getting LOTS of it right now.

780 
 WWCN11 CWTO 041842
 SEVERE WEATHER BULLETIN
 ISSUED BY ENVIRONMENT CANADA
 AT 2:42 PM EDT TUESDAY 4 SEPTEMBER 2012.
 ---------------------------------------------------------------------
 WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...

RAINFALL WARNING FOR:
 =NEW= CITY OF TORONTO
 =NEW= SARNIA - LAMBTON
 =NEW= ELGIN
 =NEW= LONDON - MIDDLESEX
 =NEW= SIMCOE - DELHI - NORFOLK
 =NEW= DUNNVILLE - CALEDONIA - HALDIMAND
 =NEW= OXFORD - BRANT
 =NEW= NIAGARA
 =NEW= CITY OF HAMILTON
 =NEW= HALTON - PEEL
 =NEW= YORK - DURHAM
 =NEW= HURON - PERTH
 =NEW= WATERLOO - WELLINGTON
 =NEW= DUFFERIN - INNISFIL
 =NEW= BELLEVILLE - QUINTE - NORTHUMBERLAND
 =NEW= KINGSTON - PRINCE EDWARD
 =NEW= PETERBOROUGH - KAWARTHA LAKES
 =NEW= STIRLING - TWEED - SOUTH FRONTENAC
 =NEW= BANCROFT - BON ECHO PARK
 =NEW= BROCKVILLE - LEEDS AND GRENVILLE
 =NEW= PRESCOTT AND RUSSELL
 =NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
 =NEW= RENFREW - PEMBROKE - BARRY'S BAY.

      ADDITIONAL RAINFALL AMOUNTS OF 20-30 MM.

      THE AREA OF THUNDERSTORMS WHICH FORMED OVER A LARGE PORTION OF
 SOUTHERN ONTARIO THIS MORNING HAS FORMED INTO A GENERAL AREA OF
 RAIN. RADAR INDICATES AMOUNTS OF 30 - 70 MM HAVE ALREADY FALLEN IN
 SOME LOCATIONS. THESE AMOUNTS ARE CONFIRMED BY MEASUREMENTS OF 70 MM
 IN MARKHAM AND 50 MM NEAR LONDON. CURRENT RADAR INDICATES A FURTHER
 20-30 MM OF RAIN IS POSSIBLE BEFORE THE SYSTEM MOVES OUT OF THE
 AREA TONIGHT.

---------------------------------------------------------------------
 WATCHES/WARNINGS ENDED FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH ENDED FOR:
       CITY OF TORONTO
       WINDSOR - ESSEX - CHATHAM-KENT
       SARNIA - LAMBTON
       ELGIN
       LONDON - MIDDLESEX
       SIMCOE - DELHI - NORFOLK
       DUNNVILLE - CALEDONIA - HALDIMAND
       OXFORD - BRANT
       NIAGARA
       CITY OF HAMILTON
       HALTON - PEEL
       YORK - DURHAM
       HURON - PERTH
       WATERLOO - WELLINGTON
       DUFFERIN - INNISFIL
       BELLEVILLE - QUINTE - NORTHUMBERLAND
       KINGSTON - PRINCE EDWARD
       PETERBOROUGH - KAWARTHA LAKES
       STIRLING - TWEED - SOUTH FRONTENAC
       BANCROFT - BON ECHO PARK
       BROCKVILLE - LEEDS AND GRENVILLE
       SMITHS FALLS - LANARK - SHARBOT LAKE
       RENFREW - PEMBROKE - BARRY'S BAY.

THE POTENTIAL FOR SEVERE THUNDERSTORMS HAS NOW ENDED IN THE AREA.

---------------------------------------------------------------------
 ==DISCUSSION==
 THUNDERSTORMS HAVE FORMED INTO A GENERAL AREA OF RAIN.

REFER TO YOUR LOCAL PUBLIC FORECAST FOR FURTHER DETAILS.

END/OSPC

[harrisale]

Rainfall warning was cool. Certainly saw the impacts with flooded streams and paths in the park behind my house.

[DarkSky]

Rainfall totals:

473 
 AWCN11 CWTO 050223
 UPDATED WEATHER SUMMARY FOR ALL OF SOUTHERN ONTARIO AND THE
 NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA
 AT 9:28 PM EDT TUESDAY 4 SEPTEMBER 2012.

-------------------------------------------------------------
 ==WEATHER EVENT DISCUSSION==

IT WAS A VERY WET DAY ACROSS PORTIONS OF SOUTHERN ONTARIO TODAY WITH
 SOME OF THE RAIN BEING PARTIALLY ATTRIBUTED TO THE ADDED MOISTURE
 FROM THE REMNANTS OF POST TROPICAL STORM ISAAC.

THE MORNING BEGAN WITH THUNDERSTORMS WHICH BROUGHT LOCALLY HEAVY
 DOWNPOURS DURING THE MORNING COMMUTE, ESPECIALLY AROUND THE GREATER
 TORONTO AREA (GTA). IT MORPHED INTO A WIDE AREA OF RAIN. RAIN
 CONTINUED THROUGH THE AFTERNOON AND IS NOW RELEGATED TO EASTERN
 ONTARIO THIS EVENING.

AS OF 10:00 PM EDT A GENERAL RAINFALL AMOUNT OF 40 MM OF RAIN FELL
 ACROSS THE REGION WITH LOCALLY HIGHER AMOUNTS OVER 80 MM REPORTED.
 RAIN CONTINUES TO FALL OVER EASTERN ONTARIO AND THIS REPORT WILL BE
 UPDATED WHEN NEW INFORMATION IS RECEIVED.

THE FOLLOWING IS A SUMMARY OF THE MOST SIGNIFICANT RAINFALL REPORTS
 (MAINLY AROUND THE GTA AND NORTH SHORE OF LAKE ONTARIO) ENVIRONMENT
 CANADA HAS RECEIVED AS OF 10:00 PM.

LOCATION                    RAINFALL AMOUNT (MM)
 LUCAN (NEAR LONDON)             50 (UNOFFICIAL OBSERVATION)
 KITCHENER                       30 (UNOFFICIAL OBSERVATION)
 UNIVERSITY OF WATERLOO          39.5
 GRIMSBY                         39.8
 CLAIREVILLE DAM (E OF BRAMPTON) 52.4
 STOUFFVILLE DAM (N OF MARKHAM)  87.3
 DUFFERIN RESERVOIR (VAUGHAN)    67.5
 G ROSS LORD DAM RESERVOIR       51.8
 (DOWNSVIEW)
 DOWNSVIEW                       53.4 (AS OF 4 PM)
 BUTTONVILLE AIRPORT (MARKHAM)   100.6
 MARKHAM (MILNE DAM)             49.2
 PEARSON AIRPORT                 42.8
 DOWNTOWN TORONTO                34.3
 BRIGHTON                        42.9 (UNOFFICICAL)
 TRENTON                         78.6
 POINT PETRE                     98.2
 KINGSTON                        89.7

CLAIREVILLE, G ROSS LORD DAM, STOUFFVILLE, DUFFERIN RESERVOIR, AND
 MARKHAM REPORTS COURTESY OF THE TORONTO AND REGION CONSERVATION
 AUTHORITY.

THIS WEATHER SUMMARY CONTAINS PRELIMINARY INFORMATION AND MAY NOT
 CONSTITUTE AN OFFICIAL OR FINAL REPORT.

END/OSPC