Prediction of Frontogenetically Forced Precipitation Bands

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700-500mb Lapse Rate Comparison SGF 12z 11/09/00 TOP 12z 10/15/01 7.8 C/km 4.5 C/km Near neutral or unstable lapse rates (with respect to a moist adiabat) implies multiple narrow and intense (maybe 5-10 km or so in width), bands. Resulted in 2-3”/hr snowfall rates on Nov 9, 2000.
Modulation of Band Intensity by Instability for a constant value of F As gravitational or symmetric stability decreases, the horizontal scale of the band decreases while the intensity of the band increases. Multiple bands become established in an unstable regime.
Page 1 and 2: PREDICTION OF FRONTOGENETICALLY FOR
Page 3 and 4: INGREDIENTS BASED FORECASTING Purp
Page 5 and 6: Vector Frontogenesis Function F = F
Page 7 and 8: Horizontal Divergence Divergence (
Page 9 and 10: Horizontal Deformation (cont.) F
Page 11 and 12: Other Contributing Factors to Front
Page 13 and 14: Dynamics of Frontogenesis (cont.) A
Page 15 and 16: Forecasting Applications
Page 17 and 18: Common Synoptic Patterns TWO CLASSE
Page 19 and 20: Northwest of Strong Cyclone 1/6/02
Page 21 and 22: II. Frontal / Weak Cyclogenesis Pat
Page 23 and 24: Example Case of Frontogenesis and B
Page 25 and 26: Surface 15 OCT 2001 00z 12z
Page 27 and 28: 18z 15 OCT 01 18z mosaic base refle
Page 29 and 30: Topeka, KS 12z 15 OCT 01
Page 31 and 32: Sloped Continuity of F 600 mb 6hr E
Page 33 and 34: Sloped Continuity of Frontogenesis
Page 35 and 36: Role of Deep-Layer Shear (cont.) Ma
Page 37 and 38: Mesoscale Band Variations - Band mo
Page 39 and 40: Mosaic Radar 8z 12/29/02 ‣ RUC 2h
Page 41 and 42: Banded - Warm Season 12Z 6/27/01 Tr
Page 43 and 44: Non-Banded 0256z 12/25/02
Page 45: Banded- Multiple 11/09/00 Montgomer
Page 49 and 50: Using EPV to Measure Stability An e
Page 51 and 52: Cloud-Layer Stratificaiton Comparis
Page 53 and 54: 00z Soundings 10/22/02 Great Falls,
Page 55 and 56: 2/7/03 09Z RUC Forecast QPF/UVV
Page 57 and 58: 2/7/03 Mosaic Radar 1215z-0022z
Page 59 and 60: Profiler - Plymouth, MA
Page 61 and 62: Snowfall Accumulations 2/7/03 • I
Page 63 and 64: Suggested Snow Band Checklist (cont

Prediction of Frontogenetically Forced Precipitation Bands

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