Author: Daniel Ridge
Publisher:
ISBN:
Category : Atmospheric pressure
Languages : en
Pages : 68
Book Description
On 10 April 1979 a comma cloud developed in association with a severe storm outbreak in Texas and Oklahoma during the AVE-SESAME 1 regional-scale experiment. With rather high time- and space-resolution rawinsonde data, plus GOES, radar, and surface data, a diagnosis was made of the structure and evolution of the disturbance which spawned the clouds. Vertical motion was computed by the kinematic method and from the quasi-geostrophic (QG) omega equation. An alternate partition of the GQ forcing function was tested. Five mesoscale waves in the mid- to high-troposphere strongly affected the weather patterns on 10 April 1979. These disturbances had wavelengths from 500 to 800 km, phase speeds of 20 to 33 m/s, and 500 mb height amplitudes around 30 m. They showed excellent time continuity in the 500 mb relative vorticity analyses. Both omega analyses showed 500 mb rising motion in eastern New Mexico six hours before a subsynoptic surface low and tornadic storms developed just to the east in Texas. Kinematic omegas indicated subsidence over the Texas coastal plain for six hours in the afternoon, evidently associated with maintenance of a surface pressure ridge and an intense low-level inversion which inhibited convection in that area. Because of its ageostrophic sensitivity and computational ease, kinematic omega is more useful than QG omega for operational purposes. However, the two methods make an independent and complementary pair for research purposes.
Diagnosis of the Comma Cloud of 10 April 1979
Author: Daniel Ridge
Publisher:
ISBN:
Category : Atmospheric pressure
Languages : en
Pages : 68
Book Description
On 10 April 1979 a comma cloud developed in association with a severe storm outbreak in Texas and Oklahoma during the AVE-SESAME 1 regional-scale experiment. With rather high time- and space-resolution rawinsonde data, plus GOES, radar, and surface data, a diagnosis was made of the structure and evolution of the disturbance which spawned the clouds. Vertical motion was computed by the kinematic method and from the quasi-geostrophic (QG) omega equation. An alternate partition of the GQ forcing function was tested. Five mesoscale waves in the mid- to high-troposphere strongly affected the weather patterns on 10 April 1979. These disturbances had wavelengths from 500 to 800 km, phase speeds of 20 to 33 m/s, and 500 mb height amplitudes around 30 m. They showed excellent time continuity in the 500 mb relative vorticity analyses. Both omega analyses showed 500 mb rising motion in eastern New Mexico six hours before a subsynoptic surface low and tornadic storms developed just to the east in Texas. Kinematic omegas indicated subsidence over the Texas coastal plain for six hours in the afternoon, evidently associated with maintenance of a surface pressure ridge and an intense low-level inversion which inhibited convection in that area. Because of its ageostrophic sensitivity and computational ease, kinematic omega is more useful than QG omega for operational purposes. However, the two methods make an independent and complementary pair for research purposes.
Publisher:
ISBN:
Category : Atmospheric pressure
Languages : en
Pages : 68
Book Description
On 10 April 1979 a comma cloud developed in association with a severe storm outbreak in Texas and Oklahoma during the AVE-SESAME 1 regional-scale experiment. With rather high time- and space-resolution rawinsonde data, plus GOES, radar, and surface data, a diagnosis was made of the structure and evolution of the disturbance which spawned the clouds. Vertical motion was computed by the kinematic method and from the quasi-geostrophic (QG) omega equation. An alternate partition of the GQ forcing function was tested. Five mesoscale waves in the mid- to high-troposphere strongly affected the weather patterns on 10 April 1979. These disturbances had wavelengths from 500 to 800 km, phase speeds of 20 to 33 m/s, and 500 mb height amplitudes around 30 m. They showed excellent time continuity in the 500 mb relative vorticity analyses. Both omega analyses showed 500 mb rising motion in eastern New Mexico six hours before a subsynoptic surface low and tornadic storms developed just to the east in Texas. Kinematic omegas indicated subsidence over the Texas coastal plain for six hours in the afternoon, evidently associated with maintenance of a surface pressure ridge and an intense low-level inversion which inhibited convection in that area. Because of its ageostrophic sensitivity and computational ease, kinematic omega is more useful than QG omega for operational purposes. However, the two methods make an independent and complementary pair for research purposes.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 688
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 688
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Quasi-Lagrangian Diagnostics of the 9-14 April 1979 Great Plains Extratropical Cyclone and Subsynoptic Scales
Author: Russ Schneider
Publisher:
ISBN:
Category :
Languages : en
Pages : 354
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 354
Book Description
Monthly Weather Review
Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 828
Book Description
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 828
Book Description
Accessions List
Author: Assessment and Information Services Center (U.S.). Library and Information Services Division
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 606
Book Description
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 606
Book Description
Accessions List
Author: United States. National Environmental Satellite, Data, and Information Service. Library and Information Services Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 606
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 606
Book Description
Accessions List
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 16
Book Description
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 16
Book Description
Synoptic and Sub-synoptic Scale Isentropic Mass Diagnostics of the 9-14 April 1979 Extratropical Cyclone
Author: Tom H. Zapotocny
Publisher:
ISBN:
Category : Cyclones
Languages : en
Pages : 258
Book Description
Publisher:
ISBN:
Category : Cyclones
Languages : en
Pages : 258
Book Description
Conference on Severe Local Storms
Author:
Publisher:
ISBN:
Category : Storms
Languages : en
Pages : 448
Book Description
Publisher:
ISBN:
Category : Storms
Languages : en
Pages : 448
Book Description
Meteorological and Geoastrophysical Abstracts
Author:
Publisher:
ISBN:
Category : Cosmic physics
Languages : en
Pages : 746
Book Description
Publisher:
ISBN:
Category : Cosmic physics
Languages : en
Pages : 746
Book Description