Posted at 2:28 PM on August 8, 2009
by Paul Huttner
Twin Cities NWS plot shows tornado watch in yellow. The Twin Cities area is included in the watch until 10pm tonight..
Update 5:45pm: It looks like the debris clouds may have won the battle today and will limit storms this evening. There is still a shot at isolated severe storms developing.
SPC has locked onto this in the past few minutes as well. This is from the latest mesoscale update issued at 5:36pm.
"UNCERTAINTY EXISTS AS TO WHETHER ADDITIONAL SURFACE-BASED STORM
DEVELOPMENT WILL OCCUR ACROSS REGION THIS EVENING. SOME HAIL WILL
REMAIN POSSIBLE WITH ELEVATED STORMS OVER PORTIONS OF WI."
Enjoy the New Orleans humidity with our first widespread 70s dew points this evening, but keep one weather eye on the sky.
MPX: 7 Nw Walnut Grove [Redwood Co, MN] public reports HAIL of quarter size (E1.00 INCH) at 04:00 PM CDT -- hailed about five minutes. most of the hail was three quarter inch in diameter.
FSD cancels Tornado Watch for Lyon, Osceola [IA] and Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles, Pipestone, Rock [MN] and Clay, Lincoln, Minnehaha, Moody, Turner, Union, Yankton [SD]
Update 4:20pm: It's not time to let any guard down for sure, but there are a lot of debris clouds which seem to be limiting supercell development. The cells that are forming right now are more "showery" rather than large discrete supercells. There are still plenty of "dynamics" such as lift and shear that may overcome the lack of surface heating caused by the debris clouds. Stay tuned to see how this develops over the next 90 minutes.
Here we go again.
After torrential rains caused flooding last night in and around the Twin Cities, another severe weather day is underway. Severe storms will move through southwest Minnesota this afternoon and head for the Twin Cities area by about 6pm tonight.
A warm front is draped close to the Twin Cities today, and storms will move northeast along the front. Large hail, damaging winds and tornadoes are possible with the stronger storms today. Keep an eye out for severe weather approaching from the west and southwest.
Here's today's mini Weather Lab Weather Center to track the severe threat:
-Twin Cities NWS watches and warnings
-Twin Cities radar loop
-Twin Cities NWS storm reports
-Sioux Falls radar loop
-Sioux Falls NWS watches and warnings
-Sioux Falls NWS storm reports
-SPC watches and discussions
What are the debris clouds from?