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It is Monday, May 21, 2012, 1317 UTC

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Radio Propagation

Indices from the U.S. NOAA Space Weather Prediction Center in Boulder Colorado, updated every three hours and published here in real time:

Solar-terrestrial indices for 20 May follow. Solar flux 131 and estimated planetary A-index 13. The estimated planetary K-index at 1200 UTC on 21 May was 1. No space weather storms were observed for the past 24 hours. No space weather storms are predicted for the next 24 hours.

What does this mean for DXers?

Here's the short story: High solar flux (solar flux is expected to begin rising from under 100 up to 150-200 when the next solar maximum is reached around 2013), high A-index (over 10) geomagnetic storms, proton events and polar-cap absorption are bad news; they tend to mean poor long-distance reception of mediumwave and tropical band shortwave stations, especially paths over polar areas and paths to east and west of your location are affected. If you live far north, reception may be good towards south and vice versa on the Southern hemisphere.
Here are more detailed instructions.

45-DAY AP FORECAST 21May12 006 22May12 010 23May12 010 24May12 008 25May12 005 26May12 005 27May12 005 28May12 005 29May12 005 30May12 005 31May12 005 01Jun12 005 02Jun12 005 03Jun12 005 04Jun12 005 05Jun12 008 06Jun12 012 07Jun12 018 08Jun12 010 09Jun12 005 10Jun12 005 11Jun12 005 12Jun12 008 13Jun12 008 14Jun12 005 15Jun12 005 16Jun12 005 17Jun12 008 18Jun12 012 19Jun12 008 20Jun12 005 21Jun12 005 22Jun12 005 23Jun12 005 24Jun12 005 25Jun12 005 26Jun12 005 27Jun12 005 28Jun12 005 29Jun12 005 30Jun12 005 01Jul12 005 02Jul12 008 03Jul12 012 04Jul12 018 45-DAY F10.7 CM FLUX FORECAST 21May12 130 22May12 130 23May12 135 24May12 125 25May12 115 26May12 115 27May12 115 28May12 115 29May12 115 30May12 115 31May12 115 01Jun12 120 02Jun12 125 03Jun12 125 04Jun12 130 05Jun12 135 06Jun12 135 07Jun12 135 08Jun12 135 09Jun12 135 10Jun12 130 11Jun12 130 12Jun12 130 13Jun12 125 14Jun12 125 15Jun12 120 16Jun12 120 17Jun12 125 18Jun12 125 19Jun12 125 20Jun12 120 21Jun12 115 22Jun12 115 23Jun12 115 24Jun12 115 25Jun12 115 26Jun12 115 27Jun12 115 28Jun12 120 29Jun12 125 30Jun12 125 01Jul12 130 02Jul12 135 03Jul12 135 04Jul12 135

Source: NOAA Space Weather
Prediction Center

Northern hemisphere

Southern hemisphere

Current situation:
Space weather now (SEC)
Today's space weather (SEC)
Solarsoft latest events (LMSAL)
Magnetic disturbance level in Nurmijärvi and Sodankylä in Finland (FMI)
DST Index and AL Index (LASP Colorado)
DST Index (Kyoto)

Forecasts:
Solar forecast (SWPC)
Solar forecast (SIDC)
Geomagnetic summary and forecast (IPS)

Short and medium term data:
Daily solar data (past 30 days, SWPC)
Daily geomagnetic data (past 30 days, SWPC)
Proton flux (3 days, SWPC)
K and A indices in Australia (past 7 days, IPS)
Solar Terrestrial activity report (past 60 days, DXLC)

Long-term data (solar cycle history):
Solar cycle progression (SWPC)
Solar cycle sunspots (SEC)
Solar cycle sunspots (SIDC)
Solar cycle solar flux (SEC)
Solar cycle Ap-Index (SEC)

General information:
Primer on Space Weather (SEC)
Geophysical Alert Description (LWCA)