Evan's CFI Notebook

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== Hazardous Inflight Weather Advisory Service (HIWAS) ======

Hazardous Inflight Weather Advisory Service (HIWAS), 
available in the 48 conterminous states, is an automated 
continuous  broadcast  of  hazardous  weather  information 
over  selected  VOR  navigational  aids  (NAVAIDs).  The 
broadcasts include advisories such as AIRMETS, SIGMETS, 
convective SIGMETS, and urgent PIREPs. The broadcasts 
are automatically updated as changes occur. Pilots should 
contact a FSS or EFAS for additional information. VORs that 
have HIWAS capability are depicted on aeronautical charts 
with an “H” in the upper right corner of the identification 
box. [Figure 13-4]

====== Transcribed Weather Broadcast (TWEB) (Alaska Only) ======
 
A continuous automated broadcast of meteorological and 
aeronautical data over selected low or medium frequency (L/
MF) and very high frequency (VHF) omnidirectional range 
(VOR) NAVAID facilities. The broadcasts are automatically 
updated as changes occur. The broadcast contains adverse 
conditions,  surface  weather  observations,  PIREPS,  and 
a  density  altitude  statement  (if  applicable).  Recordings 
may also include a synopsis, winds aloft forecast, en route 
and terminal forecast data, and radar reports. At selected 
locations, telephone access to the TWEB has been provided 
(TEL-TWEB). Telephone numbers for this service are found in the Alaska Chart Supplement U.S. (formerly Airport/Facility Directory). These broadcasts are made available 
primarily for preflight and inflight planning, and as such, 
should  not  be  considered  as  a  substitute  for  specialist-
provided preflight briefings. 

[[courses:201b:ground:wx_products|Back to 201B WX Products]]
Evan's CFI Notebook

User Tools

Site Tools

Page Tools
