Thundersleet?!
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The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K.
Thundersleet?!
Well just about 4 mins ago I had thunder... making that Thundersleet.... windy too. Odd weather/
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FLguy
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Re: Thundersleet?!
David wrote:Well just about 4 mins ago I had thunder... making that Thundersleet.... windy too. Odd weather/
it most likely was related to Conditional Symmetric Instability. it occurs when the absolute vorticity of the geostrophic flow becomes weak positive or slightly negative (the slope of the theta-e surfaces is greater than the Mg surfaces...making the atmosphere inertially unstable...which is best analyzed by areas of negative EPV).... the release of CSI (responsible for the thundersnow) is the feature which restores the atmosphere to equilibrium.
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FLguy
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David wrote:just had a big flash of lightning and thunder making that 8 total now.. sleet still falling, mixed with rain freezing at contact...
judging by the look of the NEXRAD out of topeka...most of the CSI bands appear to be located further back to the northwest of a line from great bend to st. joseph. which also looks like roughly where the mixed precip/snow line is right now.
fairly intense convection appears to be building close to topeka...which is more likely related to CI (convective instability) as compared to CSI.
Last edited by FLguy on Sun Jan 04, 2004 1:53 am, edited 1 time in total.
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David:
You beat me to it!!! I've had thunder with sleet here in Lawrence as well-though I've been dry slotted a bit we are having sleet with freezing rain-it looks like it is trying to fill in more now around here-I haven't had thunder sleet/snow since the October surprise of 1996 in Kansas City where we had 8 inches of snow 2 weeks before Haloween. What a deal!! looks like we have a pretty ggod swath of precip heading our way-there is snow all the way back to Goodland (it is moving more North than east though) have a great night-I have a 9 month old with an ear infection who will be waking up soon and a 4 year old that is going to want to play in the sleet/snow/ice all day tomm. I need some sleep!! I hope this holds together through the night!!
You beat me to it!!! I've had thunder with sleet here in Lawrence as well-though I've been dry slotted a bit we are having sleet with freezing rain-it looks like it is trying to fill in more now around here-I haven't had thunder sleet/snow since the October surprise of 1996 in Kansas City where we had 8 inches of snow 2 weeks before Haloween. What a deal!! looks like we have a pretty ggod swath of precip heading our way-there is snow all the way back to Goodland (it is moving more North than east though) have a great night-I have a 9 month old with an ear infection who will be waking up soon and a 4 year old that is going to want to play in the sleet/snow/ice all day tomm. I need some sleep!! I hope this holds together through the night!!
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1:00am cst weather round up..
NORTHEAST KANSAS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CONCORDIA CLOUDY 21 16 81 NE16G24 29.98F WCI 7
EMPORIA FRZ RAIN 28 24 85 N16 29.88R WCI 16
LAWRENCE FRZ RAIN 29 25 85 NE15G22 29.93F FOG WCI 18
MANHATTAN MIX PCPN 24 20 84 N9 29.99R
OLATHE IND CLOUDY 31 27 85 NE15G24 29.88F WCI 20
OLATHE EXE CLOUDY 30 25 81 NE18G23 29.87F WCI 18
SALINA CLOUDY 25 19 78 N15 29.95F WCI 13
TOPEKA BILLARD FRZ RAIN 27 23 85 NE13G21 29.93F FOG WCI 16
TOPEKA FORBES TSTM 27 25 92 E12 29.93R FOG WCI 17
NORTHEAST KANSAS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CONCORDIA CLOUDY 21 16 81 NE16G24 29.98F WCI 7
EMPORIA FRZ RAIN 28 24 85 N16 29.88R WCI 16
LAWRENCE FRZ RAIN 29 25 85 NE15G22 29.93F FOG WCI 18
MANHATTAN MIX PCPN 24 20 84 N9 29.99R
OLATHE IND CLOUDY 31 27 85 NE15G24 29.88F WCI 20
OLATHE EXE CLOUDY 30 25 81 NE18G23 29.87F WCI 18
SALINA CLOUDY 25 19 78 N15 29.95F WCI 13
TOPEKA BILLARD FRZ RAIN 27 23 85 NE13G21 29.93F FOG WCI 16
TOPEKA FORBES TSTM 27 25 92 E12 29.93R FOG WCI 17
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