Magnetic storms in Portland
Magnetic storms in Portland, Oregon today. Current Kp index, 3-day forecast for Portland, local time, geomagnetic latitude and aurora visibility chance.
Data as of 12 Jun, 09:41 (America/Los_Angeles).
Weather in Portland
Weather data: Open-Meteo (CC BY).
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Local context
Sensitivity · Portland
Medium sensitivity (mid latitudes)
Kp is a planetary index — the same globally. Local impact depends on geomagnetic latitude: the higher it is, the more noticeable the storm.
14-day calendar with Kp, moon and cloud factors
Seven quick questions and personal tips
Geomagnetic context for Portland
Magnetic storm in Portland: 3-day Kp chart
Aurora forecast in Portland
| Date | Max Kp | Moon | Clouds | Score | Outlook |
|---|---|---|---|---|---|
| Fri, Jun 12 | 4.7 | 12% | 4% | 0 | Auroras are very unlikely tonight. |
| Sat, Jun 13 | 5.7 | 6% | 13% | 8 | Low chance, only the strongest auroras will show. |
| Sun, Jun 14 | 4.7 | 2% | 33% | 0 | Auroras are very unlikely tonight. |
| Mon, Jun 15 | 2.0 | 0% | 81% | 0 | Auroras are very unlikely tonight. |
| Tue, Jun 16 | 3.0* | 1% | 45% | 0 | Auroras are very unlikely tonight. |
| Wed, Jun 17 | 3.0* | 3% | 3% | 0 | Auroras are very unlikely tonight. |
| Thu, Jun 18 | 3.0* | 8% | 35% | 0 | Auroras are very unlikely tonight. |
| Fri, Jun 19 | 3.0* | 15% | 0% | 0 | Auroras are very unlikely tonight. |
| Sat, Jun 20 | 3.0* | 23% | 2% | 0 | Auroras are very unlikely tonight. |
| Sun, Jun 21 | 3.0* | 33% | 0% | 0 | Auroras are very unlikely tonight. |
| Mon, Jun 22 | 3.0* | 43% | 56% | 0 | Auroras are very unlikely tonight. |
| Tue, Jun 23 | 3.0* | 54% | 64% | 0 | Auroras are very unlikely tonight. |
| Wed, Jun 24 | 3.0* | 64% | 20% | 0 | Auroras are very unlikely tonight. |
| Thu, Jun 25 | 3.0* | 74% | 51% | 0 | Auroras are very unlikely tonight. |
- Fri, Jun 120Max Kp: 4.7Moon: 12%Clouds: 4%Auroras are very unlikely tonight.
- Sat, Jun 138Max Kp: 5.7Moon: 6%Clouds: 13%Low chance, only the strongest auroras will show.
- Sun, Jun 140Max Kp: 4.7Moon: 2%Clouds: 33%Auroras are very unlikely tonight.
- Mon, Jun 150Max Kp: 2.0Moon: 0%Clouds: 81%Auroras are very unlikely tonight.
- Tue, Jun 160Max Kp: 3.0*Moon: 1%Clouds: 45%Auroras are very unlikely tonight.
- Wed, Jun 170Max Kp: 3.0*Moon: 3%Clouds: 3%Auroras are very unlikely tonight.
- Thu, Jun 180Max Kp: 3.0*Moon: 8%Clouds: 35%Auroras are very unlikely tonight.
- Fri, Jun 190Max Kp: 3.0*Moon: 15%Clouds: 0%Auroras are very unlikely tonight.
- Sat, Jun 200Max Kp: 3.0*Moon: 23%Clouds: 2%Auroras are very unlikely tonight.
- Sun, Jun 210Max Kp: 3.0*Moon: 33%Clouds: 0%Auroras are very unlikely tonight.
- Mon, Jun 220Max Kp: 3.0*Moon: 43%Clouds: 56%Auroras are very unlikely tonight.
- Tue, Jun 230Max Kp: 3.0*Moon: 54%Clouds: 64%Auroras are very unlikely tonight.
- Wed, Jun 240Max Kp: 3.0*Moon: 64%Clouds: 20%Auroras are very unlikely tonight.
- Thu, Jun 250Max Kp: 3.0*Moon: 74%Clouds: 51%Auroras are very unlikely tonight.
* Days marked with an asterisk do not have a direct NOAA forecast yet. If we have observations from 27 days ago, we use Bartels recurrence (the Sun rotates roughly every 27 days, so active regions often return with the same period). When no history is available, we substitute a baseline value typical for the current solar cycle 25 peak (Kp 3.0). Accuracy is lower than the direct three-day forecast.
How the score works
The composite score combines three signals: how strong the storm needs to be at your geomagnetic latitude, how bright the moon will be (a full moon hides faint auroras), and how cloudy the sky will be that night. A score of 70 or higher is excellent, 45 to 70 is good, below 20 means you probably will not see anything.
Magnetic storms in Portland over the last 30 days
Geomagnetic storms of class G1 and above recorded over the past month. Times are shown in the city's local timezone (PDT).
In Portland (geomagnetic latitude 51.0°), auroras are possible from Kp ≥ 8.
| Date | Peak | Max Kp | Level | Duration | Aurora visible |
|---|---|---|---|---|---|
| 11:00 | 5.0 | G1 | 3 h | No | |
| 08:00 | 6.3 | G2 | 12 h | No |
About magnetic storms in Portland
Magnetic storm in Portland today: planetary Kp = 1.7 (quiet). Over the last 7 days the maximum Kp above Portland reached 5.0 (G1); storm days (G1+) this week: 2.
Portland sits at geomagnetic latitude 51.0°. The nearest magnetic observatory continuously recording the field is Paratunka (Kamchatka), 5503 km away. Population 652,503.
Portland is located at mid-latitudes (51.0°), where storm effects on the body are usually mild and noticeable mainly during severe G4 to G5 events. At Kp ≥ 6, some weather-sensitive people may report pressure swings, headaches or restless sleep; routine precautions like extra hydration, less caffeine and lighter physical load during the strongest events are usually enough.
For most technical systems in Portland (51.0°, mid-latitudes), routine geomagnetic activity has little practical effect. Noticeable GPS, HF radio or grid issues are largely confined to severe G4 to G5 storms. Long-haul drivers, surveyors and HF operators in the region may want to check the forecast during the strongest events. Source: NOAA Space Weather Prediction Center, refreshed every 10 minutes.
Over Portland during the last 24 hours. Kp reached a maximum of 5.0 around 11:00 local time and dipped to 3.0. The planetary trend over the past 6 hours is falling — the magnetosphere near Portland is in the recovery phase. So far this month the planet has logged 2 days with a G1 or stronger geomagnetic storm.
Aurora visibility threshold for Portland. At a geomagnetic latitude of 51.0°, the minimum Kp giving a realistic chance of visible auroras above Portland is about Kp ≥ 6. The current equatorial Dst index is 0 nT — the magnetosphere is in a quiet phase. Dst complements Kp by showing how long and how deep a storm's main phase has been — useful context when checking whether auroras are likely tonight.
Weather and atmospheric pressure in Portland right now. Temperature +15.5°C, atmospheric pressure 762.1 mm Hg (1016.1 hPa), cloud cover 0%, humidity 65%, wind 9.5 km/h. During G1+ geomagnetic storms, swings in atmospheric pressure tend to amplify symptoms for weather-sensitive people: those with hypertension often notice blood-pressure spikes, and readings below 1000 hPa combined with Kp ≥ 5 frequently bring headaches and fatigue. That is why the Portland page shows both indicators side by side. Weather data from Open-Meteo (CC BY).
Aurora viewing window for Portland tonight. Sunset is at 10:59 local time, sunrise tomorrow at 19:21. Moon phase — waning crescent with 7% disk illumination. Clear sky and low moonlight make the window favorable — with enough Kp, the aurora may be visible even from within city limits..