↳ ↑ Forecast Ham Band Conditions

This page is part of the project "Understanding HF Propagation."
by Doron Tal, 4X4XM | Rate site
 
  1. How can we forecast HF propagation conditions?
  2. Forecasts can be based on the recent conditions
  3. Forecasting vs. Prediction
  4. Evolution of forecasting techniques
How can we forecast HF propagation conditions?

Forecasts can be based on the recent conditions

Regional Propagation Maps
based on ham activity and ionosondes.
Pros: Shows geographical distribution
Cons: No explicit signal disruptions
 
Recent Ham Activity (last 15 minutes)
DXview

real-time reports on 11 bands (160-6 m).


Recent MUF Conditions (last 15 minutes)
Recent MUF 3000km

Iso-frequency contours of 8 ham bands
based on data from ionosondes.


The predicted Regional LUF Conditions
Globak LUF map

Global map of the recent LUF shows the
predicted attenuation from 3 to 35 MHz
due to solar and spaceweather events.


Global Conditions Charts
based on solar-terrestrial data.
Pros: Signal disruption indicators
Cons: No geographical distribution
 
Today's Propagation indices
by Paul L Herrman, N0NBH HamQSL


Recent R-S-G reports

Solar flares | More Space weather reports


Forecasting vs. Prediction

The terms forecasting and prediction differ primarily in their time frames and methodologies.

  • Forecasting: Short-term estimations based on current data (e.g., "Conditions will improve in the next hour").
  • Prediction: Long-term estimates based on trends (e.g., "Better 40-meter conditions expected next month").


Evolution of forecasting techniques

Remarkable advancements in space technology , software-defined radio (SDR) , and the internet have revolutionized our understanding of radio wave propagation. Before the 1990s, propagation charts and reports were often published in amateur radio magazines. Today, real-time solar indices and computer programs provide accurate, up-to-the-minute propagation data using online tools .


The project "Understanding HF Propagation" focuses on near-real-time indicators and explains what they mean.

DX condition

Ham DX Map

DX propagation

Ham band conditions

Plan ahead an HF QSO

Ham radio solar events

HF propagation forecast

Global Conditions Charts

Ham radio solar weather

Ham radio space weather

HF communication circuit

DX propagation map online

DX propagation online map

Regional Propagation Maps

Current HF band conditions

Radio propagation tutorials

HF propagation disruptions

Communication disruptions

Latest HF Bands Propagation

Disruption of HF propagation

Recent HF Bands Propagation

Current ham band conditions

Current ham radio conditions

Forecast ham band conditions

Activity Map of HF Radio QSOs

Find Your Opening on the Map

Current Ham Radio Propagation

Space weather status and alerts

How to read propagation charts

Real time radio propagation map

Understanding propagation charts

HF propagation for hams explained

Current solar conditions Ham radio

Current Ham Radio HF Propagation

HF Radio Propagation Search Terms

Disrupted HF propagation conditions

Radio propagation for hams explained

How to read propagation charts for HF

Current HF Band Conditions Online Map

HF propagation Global Conditions Charts

Skywave propagation for hams explained

Current Ham Radio Propagation Conditions

Global Conditions Charts of HF propagation

HF propagation Regional Propagation Maps

How to read propagation charts for HF DXing

Real-time watching of worldwide ham activity

Regional Propagation Maps of HF propagation

Propagation of radio waves explained

Radio propagation explained

How does the sun affect radio communication?

Real-time watching of worldwide activity of hams

The Fascinating World of HF Skywave Propagation

Current HF Bands Conditions—Charts for Radio Hams

Current HF Band Conditions Maps For Radio Operators

24-hour forecast for point-to-point communication circuit

How many amateur radio operators are there in the world?

How many hams are there?