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GBDNA / Guide to Baroclinic Disturbances

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U N D E R   C O N S T R U C T I O N

A Guide to
Baroclinic Disturbances Affecting North America
by Larry Cosgrove, 30 December 2007

Foreword

One of the greatest challenges in forecasting is finding a way to quickly categorize and summarize upcoming weather events. Synoptic climatology can be used as an aid in those endeavors, by utilizing historic patterns of surface and upper level disturbances as a measure or comparison to currently evolving systems.

The following descriptions are meant to provide an accompaniment to other forms of data at the disposal of synopticians (such as numerical models, satellite, radar, etc.). 500MB and surface alignments are the principal concern, with relevant historical backdrop and climatic records used to illustrate the storm events spotlighted in this summary.

Contents

UPPER LEVEL CYCLONIC SYSTEMS

  1. DUMMY
  2. TUTT Signatures
  3. Mesoscale Cold Pools
  4. Trans-ridge Weaknesses
  5. Shortwaves
  6. Trough-type Cyclone
  7. Hybrid-type Storms
  8. Longwave Lows

COMMON STORM TRACKS OF MIDLATITUDE CYCLONES

  1. DUMMY
  2. Border Trackers
  3. Alberta Clippers
  4. GREAT LAKES BACKDOOR STORMS (a.k.a. Manitoba Maulers, Saskatchewan Screamers)
  5. PUGET SOUND TO GREAT BASIN STORMS
  6. MOGOLLAN RIM STORMS
  7. PANHANDLE HOOK "A" CYCLONES
  8. PANHANDLE HOOK "B" CYCLONES
  9. SOUTHLAND TEMPEST (a.k.a. EL NINO EXPRESS)
  10. GALVESTON BAY SPIN-UPS
  11. GULF COASTERS
  12. COLORADO TRINIDAD CYCLONES ("A" and "B" North and South Variants)
  13. COLORADO-LIMON STORMS
  14. GREAT PLAINS/CORN BELT DUSTERS
  15. PENINSULA STORMS
  16. PIEDMONT CYCLONES (a.k.a. Inland Runner)
  17. CHATTANOOGA CHOO-CHOOS
  18. HATTERAS LOWS (NOR'EASTERS)

VORTICES AND SLOW-PROGRESS CLOSED LOWS

  1. DUMMY
  2. ALEUTIAN LOW
  3. GULF OF ALASKA VORTEX
  4. HUDSON BAY VORTEX
  5. GRAND BANKS VORTEX
  6. KONA LOW
  7. BERMUDA LOW
  8. CIRCUMPOLAR VORTEX

"A Guide to Baroclinic Disturbances" is © 2007 by Larry Cosgrove.
All rights reserved.

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