444slides.02.011107

444slides.02.011107 - v 0 km 3 km 6 km 9 km Computing...

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Schedule for the next couple of weeks Wed 10 Jan regular class Thu 11 Jan regular class Mon 15 Jan NO CLASS: MLK Jr. holiday Tue 16 Jan basic forecast process and briefing overview; Dr. P briefs Wed 17 Jan in-class lab exercise; Dr. P briefs Thu 18 Jan NO CLASS Mon 22 Jan Q&A on lab with Ben, finish lab in class; Dr. P out of town Tue 23 Jan regular class; student briefings begin Wed 24 Jan regular class; student briefing Thu 25 Jan in-class lab; student briefing
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SBCAPE SBCIN MUCAPE MUCIN
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v Hodographs
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v Hodographs
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v Hodographs
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u v 0 km 3 km 6 km 9 km Computing deep layer vertical wind shear Most forecasters use the magnitude of the 0-6 km shear vector 10 m/s 10 m/s
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v Storm-relative winds and hodographs treat storm’s motion as the origin Storm motion
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Helicity density ( 29 × = - 2 s m u u H m m
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Z 0 km 3 km 6 km Helical flow on a hodograph
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Helicity density Environmental helicity ( 29 × = = - 2 2 0 0 s m dz u u dz H Hel z z m m Evaluated for a layer ( 29 × = - 2 s m u u H m m
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u
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Unformatted text preview: v 0 km 3 km 6 km 9 km Computing helicity Hel = twice the signed area swept out by the hodograph, using 0 as the origin Normally reported for 0-3 km layer 10 m/s 10 m/s area=100 m 2 /s 2 =100 J/kg u v 0 km 3 km 6 km 9 km Computing storm-relative helicity motion of a supercell SRH = twice the signed area swept out by storm-relative hodograph (i.e. use the storm motion as the origin) 10 m/s 10 m/s area=100 m 2 /s 2 =100 J/kg NSHARP does much of this for you! NSHARP does much of this for you! Take note of what parcel youre using, and remember that you can change it! NSHARP does much of this for you! Toggle between skew-T and hodo Hourly plan view analyses of convective forecasting indices from SPC Hourly plan view analyses of convective forecasting indices from SPC Hourly plan view analyses of convective forecasting indices from SPC...
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444slides.02.011107 - v 0 km 3 km 6 km 9 km Computing...

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