Monday, Jul.11 - svr storm possibility

[DarkSky]

Watches started going up early today...

946 
 WWCN11 CWTO 111243
 SEVERE WEATHER BULLETIN
 ISSUED BY ENVIRONMENT CANADA
 AT 8:43 AM EDT MONDAY 11 JULY 2011.
 ---------------------------------------------------------------------
 WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH FOR:
 =NEW= WINDSOR - ESSEX - CHATHAM-KENT
 =NEW= SARNIA - LAMBTON.

      A LINE OF INTENSE THUNDERSTORMS OVER MICHIGAN IS MOVING
       EASTWARD AND MAY REACH SOUTHWESTERN ONTARIO BY LATE THIS
       MORNING.  THE MAIN THREAT WITH THESE THUNDERSTORMS IS DAMAGING
       WINDS.  HAIL, HEAVY DOWNPOURS, AND INTENSE LIGHTNING ARE ALSO
       POSSIBLE.

---------------------------------------------------------------------
 ==DISCUSSION==
 REFER TO YOUR LOCAL PUBLIC FORECAST FOR FURTHER DETAILS.

END/OSPC

[fitzcalvin]

Is it just me, or is the line that passed through Chicago (and now moving through Michigan) looking sort of derecho-like? Bow echo and long-lived, with loads of wind damage reports rolling in.

[Anspray]

Its not you...

[JohnCyr]

For Ottawa Again Tonight.. Ill be out for sure! Some more funnels were also observed on the 8th but I was way to drunk to think about storms. lol

Ottawa South - Richmond - Metcalfe
2:35 PM EDT Monday 11 July 2011
Severe thunderstorm watch for 
Ottawa South - Richmond - Metcalfe continued

Weather conditions near the Ottawa Valley are favourable for severe thunderstorms this afternoon through early this evening. The main threat is heavy downpours.

[StormJunkie]

will be interesting if that squall line dissipates by evening or spawns a few supercells further south.

[obwan]

for those of you wondering if it was a derecho, from buffalo;

.NEAR TERM /THROUGH TUESDAY/...
315 PM UPDATE...AS SO OFTEN HAS BEEN THE CASE SO FAR THIS
SUMMER...WESTERN NY REMAINS IN THE "SWEET SPOT" BETWEEN ACTIVE
WEATHER REGIMES. TODAY WE HAVE SEEN A MASSIVE TSTORM COMPLEX/DERECHORACE ACROSS CHICAGO AREA AND THEN EAST INTO NW OHIO BEFORE DIVING SE
ACROSS CNTRL OHIO AT PRESS TIME. EDGE OF ITS SHOWERS LOOKS TO CLIP
SW CHAUT COUNTY NEXT COUPLE OF HOURS BUT SHOULD STAY SOUTH OF MOST
OF OUR REGION. ON OUR OTHER FLANK...FAST UPPER JET EXISTS UP ACROSS
ONTARIO AND QUEBEC...WITH SOME CONVECTION ALONG ITS SOUTHERN FRINGE
UP OVER AND NORTH OF GEORGIAN BAY...BUT THIS PROGGED TO STAY TO OUR
NORTH AS IT WORKS TOWARD NRN ST LAWR VALLEY/OTTAWA REGION THIS
EVENING. IN BETWEEN...ABUNDANT DEBRIS MIDDLE CLOUD WILL WORK ACROSS
OUR REGION FOR REST OF AFTERNOON INTO EARLY EVENING...BUT DONT SEE
ANYTHING MORE THAN A SPRINKLE OR TWO IN GENERAL. THERE IS SOME CONVECTION
TRYING TO FORM ALONG THE FRONT EDGE OF THIS CLOUD SHIELD THOUGH...SO
COULD SEE A FEW BRIEF SHOWERS WORKING ACROSS GEN VLY/FINGER LAKES
THROUGH 22Z AND NORTH COUNTRY AROUND 6-8 PM. OTHERWISE...WILL GO
WITH A GENERAL 15-20 POPS THIS EVENING TO ACCOUNT FOR ANYTHING
STRAY...AND AGAIN IN THE 06-10Z TIME FRAME AS A WEAK BOUNDARY
DROPS SOUTHEAST ACROSS THE AREA. IT WILL STAY MUGGY TONIGHT.

[davefootball123]

It may or may not have been a derecho. Because from what ive seen it didnt have sustained winds of 60mph, only gusts of 70 to 75mph. A drecho has to have sustained winds over 60mph and it has to do that for 6hrs. I dont think this quite did that. Or it may have but not past Dtx /toledo area.

[Derecho]

Originally Posted by davefootball123

It may or may not have been a derecho. Because from what ive seen it didnt have sustained winds of 60mph, only gusts of 70 to 75mph. A drecho has to have sustained winds over 60mph and it has to do that for 6hrs. I dont think this quite did that. Or it may have but not past Dtx /toledo area.

It wAs most definitely a derecho

[fitzcalvin]

NWS and news reports confirming that it was a derecho. Signature just had that evil look to it when I first saw it yesterday.

If you check out the wind reports for yesterday on the SPC site (http://www.spc.noaa.gov/climo/reports/yesterday.html), the distinct path is pretty impressive. (I would have imbedded the graphic into this message, but haven't yet figured out how to do that - any help on how to do that would be appreciated)

[davefootball123]

Originally Posted by Derecho

It wAs most definitely a derecho

Yes but not very much past central ohio. You have to look to see if it had sustained winds over 60mph. No doubt it was absolutley insane though

EDIT: I appear to be mistaken. I just looked at a few thins and it appears that sustained winds of 60mph and widspread wind damage occured from Nebraska all the way into Ohio/PA and to a lesser extent into maryland