Convective Sigmets
Entry ID: gov.noaa.ncdc.C00644

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Summary
Abstract: Convective Sigmet maps cover the contiguous U.S. and are produced monthly. These maps are provided as an aid in evaluating the impact of thunderstorms on the U.S. Airspace System using the methods developed by Slemmer and Silberberg (2004). Convective Sigmets (CSIG) are issued by NOAA's Aviation Weather Center as a means of advising aircraft pilots of convective activity that is deemed hazardous to aviation. Convective Sigmets are text bulletins routinely issued on an hourly basis at 55 minutes past the hour, as well as times between hours (non-routine issuances) when areas of convection develop rapidly. Each CSIG is a subjectively drawn polygon, line, or circle that depicts convection whenever a specified set of criteria are met. Convective Sigmets are weather advisories concerning convective weather significant to the safety of all aircraft. Convective SIGMETs are issued for tornadoes, lines of thunderstorms, embedded thunderstorms of any intensity level, areas of thunderstorms greater than or equal to VIP level 4 with an area coverage of 4/10 (40%) or more, and hail 3/4 inch or greater.

Purpose: To make a wide range of climatic data available to researchers and the public.

SUPPLEMENTAL INFORMATION: web page

CURRENTNESS REFERENCE: Ground Condition

Related URL
Link: VIEW EXTENDED METADATA
Description: View Source Metadata document from the Metadata Manager and Repository (NMMR).


Link: VIEW RELATED INFORMATION


Geographic Coverage
 N: 50.0 S: 24.0  E: -66.0  W: -125.0

Data Set Citation
Dataset Originator/Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Dataset Title: Convective Sigmets
Dataset Release Date: Unknown
Dataset Release Place: Asheville, North Carolina
Dataset Publisher: DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Data Presentation Form: map
Online Resource: http://www.ncdc.noaa.gov http://www.ncdc.noaa.gov/oa/climate/resear...


Temporal Coverage
Start Date: 1995-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA


Science Keywords
ATMOSPHERE >ALTITUDE >TROPOPAUSE    [Definition]
ATMOSPHERE >ATMOSPHERIC PHENOMENA >LIGHTNING    [Definition]
ATMOSPHERE >ATMOSPHERIC PHENOMENA >STORMS    [Definition]
ATMOSPHERE >ATMOSPHERIC PHENOMENA >TORNADOES    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >ANTICYCLONES/CYCLONES    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >ATMOSPHERIC STABILITY    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >PRECIPITABLE WATER    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >CONVECTION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >CONVERGENCE/DIVERGENCE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >SURFACE WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >TURBULENCE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >VERTICAL WIND MOTION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND SHEAR    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD FREQUENCY    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD HEIGHT    [Definition]
ATMOSPHERE >CLOUDS >CLOUD TYPES    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >TRANSPORTATION    [Definition]
SPECTRAL/ENGINEERING >RADAR    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >FLIGHT LEVEL WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND PROFILES    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
TRANSPORTATION


Project
ESIP >Earth Science Information Partners Program    [Information]


Quality
ATTRIBUTE ACCURACY REPORT: Not provided

LOGICAL CONSISTENCY REPORT: Unknown

COMPLETENESS REPORT: Completeness information not available.

LINEAGE/PROCESS STEP:
PROCESS DESCRIPTION: Unknown
PROCESS DATE: Unknown


Access Constraints
ACCESS CONSTRAINTS: None

DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.


Use Constraints
None


Keywords
UNITED STATES OF AMERICA
GOSIC
G3OS/


Data Set Progress
IN WORK


Data Center
National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce    [Information]
Data Center URL: http://www.ncdc.noaa.gov/

Data Center Personnel
Name: NCDC CUSTOMER SERVICE
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.orders at noaa.gov
Contact Address:
151 Patton Avenue, Room 120
City: Asheville
Province or State: NC
Postal Code: 28801-5001
Country: USA


Personnel
NCDC CUSTOMER SERVICE
Role: DIF AUTHOR
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.orders at noaa.gov
Contact Address:
151 Patton Avenue, Room 120
City: Asheville
Province or State: NC
Postal Code: 28801-5001
Country: USA



Creation and Review Dates
DIF Creation Date: 2006-06-27
Last DIF Revision Date: 2011-07-21

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Link to Web Site