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June 22-23 Severe Weather Outbreak


Stebo

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DTX just updated their Hazardous Weather Outlook. They aren't giving up!

AFTER A BREAK IN THUNDERSTORM ACTIVITY DURING THE EARLY EVENING...A

SECOND ROUND OF STORMS IS EXPECTED TO DEVELOP BY LATE EVENING INTO

THE OVERNIGHT HOURS. THERE REMAINS POTENTIAL FOR SIGNIFICANT SEVERE

WEATHER AS STORMS DEVELOP ALONG AND AHEAD OF A COLD FRONT OVER THE

WESTERN GREAT LAKES. THIS FRONT WILL SWEEP THROUGH SOUTHEAST

MICHIGAN DURING THE NIGHT AND EXIT BY SUNRISE TUESDAY. DAMAGING WIND

GUSTS AND LARGE HAIL REMAIN THE PRIMARY HAZARDS BUT TORNADOES AND

FLOODING ARE ALSO STILL POSSIBLE. INDIVIDUAL STORM MOTION WILL BE

WEST TO EAST AT 45 MPH AND PROPAGATION OF LINES OF STORMS COULD

INCREASE IN EXCESS OF 50 MPH.

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DTX just updated their Hazardous Weather Outlook. They aren't giving up!

possible something maybe trying to get going near big rapids, it would be near the instability gradient with a nice uncontaminated flow from the SW into it if it were to go.

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MESOSCALE DISCUSSION 1123

NWS STORM PREDICTION CENTER NORMAN OK
0608 PM CDT MON JUN 22 2015

AREAS AFFECTED...SERN IA...NRN IL

CONCERNING...TORNADO WATCH 335...

VALID 222308Z - 230015Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 335 CONTINUES.

SUMMARY...CONVECTION IS EXPECTED TO EXPAND ACROSS WRN AND NRN
PORTIONS OF WW335 OVER THE NEXT FEW HOURS.

DISCUSSION...CONVECTION IS GRADUALLY EXPANDING IN AREAL COVERAGE
ALONG A PRE-FRONTAL CORRIDOR FROM SCNTRL IA...NEWD INTO NWRN IL.
ALONG THIS ZONE...ISOLATED SUPERCELLS HAVE DEVELOPED WITH ONE
LONGER-LIVED UPDRAFT PROPAGATING SEWD ACROSS MONROE COUNTY IA. OVER
THE NEXT FEW HOURS IT APPEARS TSTM ACTIVITY WILL INCREASE
SUBSTANTIALLY INTO NRN IL ALONG/NEAR OLD OUTFLOW BOUNDARY THAT IS
LOSING ITS IDENTITY. ADDITIONALLY...SHOWERS ARE SLOWLY DEEPENING
ACROSS NWRN MO BUT THIS CONVECTION MAY STRUGGLE A BIT DUE TO VERY
WARM TEMPERATURES ALOFT.

..DARROW.. 06/22/2015

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Seeing rapid intensification of the two supercells as they cross the river. 

I was observing the same thing... Ive been paying a lot of attention to those for about an hour. Northern most one has exhibited pretty long lived rotation, and much stronger than the southernmost one. But the southernmost supercell looks better on reflectivity. 

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I was observing the same thing... Ive been paying a lot of attention to those for about an hour. Northern most one has exhibited pretty long lived rotation, and much stronger than the southernmost one. But the southernmost supercell looks better on reflectivity. 

wonder why no warning for the northern one tbh

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84/74...storms in eastern iowa near davenport growing stronger in an area that didn't have nearly as much destabilization as areas further south near the ottumwa cell...

 

 

Just thinking back on the crazy forecast soundings that were posted for Chicagoland valid at 00z Tuesday, I think they had temps in the mid 80s and dews in the mid 70s.  It's only 2 or 3 degrees off from those values right now so while the threat has been tempered to some degree, I'd have some cautious optimism around there at this point.

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