Grid AO21 Band Conditions
Localized HF conditions for Maidenhead locator AO21. Coordinating at 51.50°, -175.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
AO21 conditions are FAIR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 137.
From the AO21 operating area, work the 15:50 UTC and 07:44 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses AO21.
Night operation should keep 20m on watch and move to 40m as the path darkens.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- upper mid-latitude
- Local phase
- Darkness
- Aurora exposure
- low at this latitude
- Grayline
- 15:50 UTC / 07:44 UTC
- Best high band
- 10m
- Nearest city
- the AO21 operating area
● Local Band Quality Scorings
Use this local score for AO21, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from AO21 — the AO21 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from AO21 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| East Asia / Japan | 2,524 mi | 264° | 40m, 20m, 80m | Open now |
| North America | 3,664 mi | 71° | 10m, 15m, 20m | Open now |
| Europe | 5,418 mi | 357° | 40m, 20m, 80m | Open now |
| South Asia | 5,725 mi | 297° | 40m, 20m, 80m | Open now |
| Oceania | 6,019 mi | 210° | 40m, 20m, 80m | Open now |
| South America | 8,180 mi | 78° | 10m, 15m, 20m | Open now |
| Southern Africa | 10,359 mi | 320° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for AO21
A planning heuristic for the local day at AO21, built from sunrise 15:50 UTC, sunset 07:44 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching AO21 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in AO21, AO22, AO20, AO31, AO11. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
Worked All Europe - SSB starts Sat, 12 Sep 2026 00:00:00 GMT. Current forecast from AO21: 10m POOR, 15m POOR, 20m FAIR. Current solar conditions (SFI 137, K 3) favor 10m, 15m, 20m for this contest weekend.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links