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April 15 Severe Weather Thread


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Interestingly enough, despite the cap concerns, the 21z SPC mesoanalysis indicates an area of uncapped 500-1000 J/kg MLCAPE over central and portions of northeast IL. Some convection recently fired over McClean and Livingston counties, so we'll see if anything comes of it given this and the strong shear profiles. So far, looks like it's gotten a bit better organized.

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Interestingly enough, despite the cap concerns, the 21z SPC mesoanalysis indicates an area of uncapped 500-1000 J/kg MLCAPE over central and portions of northeast IL. Some convection recently fired over McClean and Livingston counties, so we'll see if anything comes of it given this and the strong shear profiles. So far, looks like it's gotten a bit better organized.

been watching that, might scrape the southern end of the city if it continues to build

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mlcp.gif?1334526905344

Interestingly enough, despite the cap concerns, the 21z SPC mesoanalysis indicates an area of uncapped 500-1000 J/kg MLCAPE over central and portions of northeast IL. Some convection recently fired over McClean and Livingston counties, so we'll see if anything comes of it given this and the strong shear profiles. So far, looks like it's gotten a bit better organized.

Looks like that area has received better heating than the DVN area.

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Cap has finally unzipped in S Central TX...

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE CORPUS CHRISTI TX

515 PM CDT SUN APR 15 2012

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

WESTERN GOLIAD COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 600 PM CDT

* AT 511 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

PAIR OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE

HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE

LOCATED ALONG A LINE EXTENDING FROM CHARCO TO 8 MILES NORTHWEST OF

BERCLAIR...OR ALONG A LINE EXTENDING FROM 12 MILES NORTHWEST OF

GOLIAD TO 16 MILES NORTH OF BEEVILLE. THESE STORMS WERE NEARLY

STATIONARY.

* LOCATIONS IMPACTED INCLUDE...

BERCLAIR...

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Competition between cells is certainly a concern, but these storms are moving into an excellent environment in north-central IA.

I'd be hanging south by Fort Dodge waiting for one that looks like it'll dominate the line, or at least one with a bigger break to its south than the others.

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BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

523 PM CDT SUN APR 15 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...

CENTRAL MCLEOD COUNTY IN CENTRAL MINNESOTA...

EXTREME NORTH CENTRAL SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 600 PM CDT

* AT 520 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO NEAR BROWNTON...OR OVER BROWNTON. RADAR SHOWED THE TORNADIC STORM MOVING NORTH AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE...

HUTCHINSON... BROWNTON... BISCAY... SUMTER...

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SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

534 PM CDT SUN APR 15 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MCLEOD COUNTY UNTIL 600 PM CDT...

AT 529 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO NEAR BISCAY. THIS TORNADO WAS LOCATED NEAR BISCAY...OR NEAR HUTCHINSON...MOVING NORTH AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...

MAINLY RURAL AREAS OF NORTHERN MCLEOD COUNTY.

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Severe threat is over, but looks like we'll at least see some more rain/t'storms come in with that band just NE of the Quad Cities if it doesn't shift east too fast. This looks to be a bust of a mod risk unless that thin line in E Minnesota starts producing as it enters Wisconsin and SE Minnesota.

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I have to say the GFS and the other models were pretty good within 48 hours at the placement of the precip today. Considering most were expecting the Upper Mississippi Valley to be the zone of big storms, and the models indicated one slug of moisture near the low up in Minnesota, and another one with the gulf flow from the Lower Mississippi Valley up to Lake Michigan, that was pretty much what we got.

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Could the LLJ maybe get some interesting going in Wisconsin tonight? Still wondering since the NWS hasn't downgraded today's outlook at all.

01z outlook did downgrade quite a bit. Still a large latitudinal area with some threat but magnitude considerably lessened.

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Seems that modified EML aloft is really hurting mid level lapse rates and overall instability. This mod risk is going to have a tough time unless things change soon.

Do you think that is what hurt the potential? I mean, there were still areas of 1000+ MLCAPE to work with.

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