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June 10-12 Severe Weather Thread


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GRR

SHORT TERM...(1058 AM EDT FRI JUN 10 2011)

(TODAY THROUGH SUNDAY AFTERNOON)

THE FIRST AREA OF TSRA IS EXITING THE CWA ATTM. SFC ANALYSIS SHOWS A

WARM FRONT STRETCHING ACROSS NRN IL/IN. ABUNDANT CLOUD COVER WILL

LIKELY KEEP THE CWA ON THE COOL SIDE TODAY. LATEST NAM...SUPPORTED

BY THE RUC...NOW KEEPS THE WARM FRONT SOUTH OF THE CWA. THAT HAS

MAJOR IMPLICATIONS ON OUR SVR THREAT. IT/S LOOKING INCREASINGLY

LIKELY THAT SVR STORMS WILL REMAIN SOUTH OF THE CWA. NOT COMPLETELY

SOLD ON THAT YET...BUT TRENDS ARE POINTING IN THAT DIRECTION.

ELEVATED INSTABILITY IS STILL PRESENT ON THE 12Z NAM BUT CLEARLY THE

BETTER INSTABILITY REMAINS SOUTH OF I-94.

UPDATED THE GRIDS TO REFLECT LOWER POPS TODAY AS REGIONAL RADAR

DOESN/T SHOW MUCH PCPN WEST OF THE CWA. CONVECTION CONTINUES TO FIRE

OVER NW MISSOURI CLOSER TO THE SFC LOW...BUT WILL TAKE SEVERAL HOURS

BEFORE IT GETS CLOSE TO US...IF IT GETS CLOSE TO US.

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Very concerned currently for NE Indiana/NW Ohio for tonight. Current SRH values are expanding to 300 with anywhere from 45-55 kts of bulk shear and now the sun is out in full force temperatures are rising as well as CAPE which should be able to hit 3000 j/kg across the area later today. The vis sat is showing a lot of stuff starting to rise especially that cu field right overhead. Also EHI's are now at 2 in some parts and that is also growing. I'm tellin you guys a few more hours of sun and things could get bad

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Very concerned currently for NE Indiana/NW Ohio for tonight. Current SRH values are expanding to 300 with anywhere from 45-55 kts of bulk shear and now the sun is out in full force temperatures are rising as well as CAPE which should be able to hit 3000 j/kg across the area later today. The vis sat is showing a lot of stuff starting to rise especially that cu field right overhead. Also EHI's are now at 2 in some parts and that is also growing. I'm tellin you guys a few more hours of sun and things could get bad

I am going to have to agree. I am seeing the significant tornado parameter (effective) at a value of 2 near Fort Wayne. There is also high moisture convergence there. Several non-severe storms have popped up from north central Indiana to Toledo, and one perhaps marginal severe storm at Muncie.

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Very concerned currently for NE Indiana/NW Ohio for tonight. Current SRH values are expanding to 300 with anywhere from 45-55 kts of bulk shear and now the sun is out in full force temperatures are rising as well as CAPE which should be able to hit 3000 j/kg across the area later today. The vis sat is showing a lot of stuff starting to rise especially that cu field right overhead. Also EHI's are now at 2 in some parts and that is also growing. I'm tellin you guys a few more hours of sun and things could get bad

Looks like Toledo should escape the worst of it though as temps are only in the upper 60s / low 70s there with a cool onshore breeze, unlike further south where it's in the mid 80s.

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Cell merger just south of Macomb. Also TOR warned.

BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE LINCOLN IL

715 PM CDT FRI JUN 10 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...

NORTHEASTERN CASS COUNTY IN WEST CENTRAL ILLINOIS...

SOUTHERN FULTON COUNTY IN WEST CENTRAL ILLINOIS...

WESTERN MASON COUNTY IN CENTRAL ILLINOIS...

EASTERN SCHUYLER COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 815 PM CDT.

* AT 713 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS

STORM WAS LOCATED NEAR LITTLETON...OR 6 MILES NORTHWEST OF

RUSHVILLE...AND MOVING EAST AT 35 MPH. FUNNEL CLOUDS HAVE BEEN

SIGHTED WITH THIS STORM. IT COULD PRODUCE A TORNADO AT ANY TIME.

* LOCATIONS IMPACTED INCLUDE...

HAVANA...VERMONT...BROWNING...ASTORIA...CHANDLERVILLE...BATH...

KILBOURNE...RAY...MARBLETOWN...SNICARTE...BLUFF CITY...DUNCAN

MILLS...CHATAUQUA PARK...LIVERPOOL...POPLAR CITY...GOOFY RIDGE AND

TOPEKA.

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Nice bow echo moving across S IL into SW IN here soon

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE LINCOLN IL

1219 AM CDT SAT JUN 11 2011

ILC025-049-079-159-110545-

/O.CON.KILX.SV.W.0154.000000T0000Z-110611T0545Z/

JASPER IL-RICHLAND IL-CLAY IL-EFFINGHAM IL-

1219 AM CDT SAT JUN 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EFFINGHAM...

CLAY...NORTHWESTERN RICHLAND AND WESTERN JASPER COUNTIES UNTIL 1245

AM CDT...

AT 1218 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A

LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS

IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE

EXTENDING FROM SHUMWAY TO 6 MILES NORTHEAST OF IOLA TO STEPHEN FORBES

STATE PARK...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...

EFFINGHAM...FLORA...NEWTON...XENIA...LOUISVILLE...BIBLE GROVE...

TEUTOPOLIS...DIETERICH...MONTROSE...INGAHAM...WHEELER...SAILOR

SPRINGS...BOGOTA...CLAY CITY...NOBLE...SCHNELL...HORD...

HEARTVILLE...ELLIOTSTOWN AND LATONA.

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Had an intense line move through central Hamilton County here in Indiana. My house was right at the apex of the storm as it bowed out. The lightning was intense and the winds along the gust front were easily 70mph. 74 mph winds recorded a few miles to my SE. Would not be surprised if there were a few spots higher than that. Best storm of the year so far, the shelf cloud on this storm was sick as I was out on the driveway watching it approach!

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Had an intense line move through central Hamilton County here in Indiana. My house was right at the apex of the storm as it bowed out. The lightning was intense and the winds along the gust front were easily 70mph. 74 mph winds recorded a few miles to my SE. Would not be surprised if there were a few spots higher than that. Best storm of the year so far, the shelf cloud on this storm was sick as I was out on the driveway watching it approach!

Quite a few reports of trees down in Anderson. Elwood has lots of street flooding. Had a citizen funnel reported. Not too much here other than that.

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This setup actually reminds me of 6/5/10 in some ways, but (and it's a big but) the best deep layer shear lags behind the frontal zone in this case. I'm not expecting anything like last year but I've learned to not turn my back on a warm front.

This.

Well, I don't think the warm front by itself would have yielded anything in our area yesterday. This outflow boundary helped trigger some storms that dumped copious amounts of rain and a few hail and isolated severe wind reports.

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As much as I hate saying this... I think JLN is better (in the worst possible way).

(Okay, that or a little bit north.)

No thanks. :(

The last updated HRRR does develop supercells in NE KS and the SPC Day 1 took a little stronger wording.

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 468

NWS STORM PREDICTION CENTER NORMAN OK

150 PM MDT SUN JUN 12 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF

SOUTHEAST MONTANA

SOUTHWEST NORTH DAKOTA

WESTERN SOUTH DAKOTA

NORTHEAST WYOMING

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 800

PM MDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.

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