Magnetic storms in Grenoble
Magnetic storms in Grenoble, Rhône-Alpes today. Current Kp index, 3-day forecast for Grenoble, local time, geomagnetic latitude and aurora visibility chance.
Data as of 24 Aug, 08:08 (Europe/Paris).
Weather in Grenoble
Weather data: Open-Meteo (CC BY).
Health and geomagnetic storms
A small library on how geomagnetic activity is associated with blood pressure, migraine, sleep, the cardiovascular system, anxiety and general wellbeing. Backed by peer-reviewed research, free of medical advice.
Cardiovascular system and geomagnetic storms
Effects on heart rhythm, emergency call statistics, who should pay extra attention.
HealthOlder adults and geomagnetic storms
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Health
Local context
Sensitivity · Grenoble
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 Grenoble
Magnetic storm in Grenoble: 3-day Kp chart
Aurora forecast in Grenoble
| Date | Max Kp | Moon | Clouds | Score | Outlook |
|---|---|---|---|---|---|
| Sun, Aug 23 | — | 73% | 8% | — | Kp forecast is not yet available for this date. |
| Mon, Aug 24 | 1.7 | 82% | 70% | 0 | Auroras are very unlikely tonight. |
| Tue, Aug 25 | 1.7 | 90% | 55% | 0 | Auroras are very unlikely tonight. |
| Wed, Aug 26 | 1.7 | 95% | 69% | 0 | Auroras are very unlikely tonight. |
| Thu, Aug 27 | 1.7 | 99% | 100% | 0 | Auroras are very unlikely tonight. |
| Fri, Aug 28 | 3.0* | 100% | 100% | 0 | Auroras are very unlikely tonight. |
| Sat, Aug 29 | 3.0* | 99% | 30% | 0 | Auroras are very unlikely tonight. |
| Sun, Aug 30 | 3.0* | 96% | 23% | 0 | Auroras are very unlikely tonight. |
| Mon, Aug 31 | 3.0* | 91% | 43% | 0 | Auroras are very unlikely tonight. |
| Tue, Sep 01 | 3.0* | 84% | 49% | 0 | Auroras are very unlikely tonight. |
| Wed, Sep 02 | 3.0* | 75% | 32% | 0 | Auroras are very unlikely tonight. |
| Thu, Sep 03 | 3.0* | 65% | 39% | 0 | Auroras are very unlikely tonight. |
| Fri, Sep 04 | 3.0* | 55% | 51% | 0 | Auroras are very unlikely tonight. |
| Sat, Sep 05 | 3.0* | 44% | 95% | 0 | Auroras are very unlikely tonight. |
| Sun, Sep 06 | 3.0* | 34% | — | 0 | Auroras are very unlikely tonight. |
- Sun, Aug 23no dataMax Kp: —Moon: 73%Clouds: 8%Kp forecast is not yet available for this date.
- Mon, Aug 240Max Kp: 1.7Moon: 82%Clouds: 70%Auroras are very unlikely tonight.
- Tue, Aug 250Max Kp: 1.7Moon: 90%Clouds: 55%Auroras are very unlikely tonight.
- Wed, Aug 260Max Kp: 1.7Moon: 95%Clouds: 69%Auroras are very unlikely tonight.
- Thu, Aug 270Max Kp: 1.7Moon: 99%Clouds: 100%Auroras are very unlikely tonight.
- Fri, Aug 280Max Kp: 3.0*Moon: 100%Clouds: 100%Auroras are very unlikely tonight.
- Sat, Aug 290Max Kp: 3.0*Moon: 99%Clouds: 30%Auroras are very unlikely tonight.
- Sun, Aug 300Max Kp: 3.0*Moon: 96%Clouds: 23%Auroras are very unlikely tonight.
- Mon, Aug 310Max Kp: 3.0*Moon: 91%Clouds: 43%Auroras are very unlikely tonight.
- Tue, Sep 010Max Kp: 3.0*Moon: 84%Clouds: 49%Auroras are very unlikely tonight.
- Wed, Sep 020Max Kp: 3.0*Moon: 75%Clouds: 32%Auroras are very unlikely tonight.
- Thu, Sep 030Max Kp: 3.0*Moon: 65%Clouds: 39%Auroras are very unlikely tonight.
- Fri, Sep 040Max Kp: 3.0*Moon: 55%Clouds: 51%Auroras are very unlikely tonight.
- Sat, Sep 050Max Kp: 3.0*Moon: 44%Clouds: 95%Auroras are very unlikely tonight.
- Sun, Sep 060Max Kp: 3.0*Moon: 34%Clouds: —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 Grenoble 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 (GMT+2).
In Grenoble (geomagnetic latitude 46.3°), auroras are extremely rare even during strong storms.
| Date | Peak | Max Kp | Level | Duration | Aurora visible |
|---|---|---|---|---|---|
| 05:00 | 5.0 | G1 | 3 h | No | |
| 20:00 | 5.3 | G1 | 3 h | No | |
| 05:00 | 5.0 | G1 | 3 h | No |
Nearby cities
About magnetic storms in Grenoble
Magnetic storm in Grenoble today: planetary Kp = 1.3 (quiet). Over the last 7 days the maximum Kp above Grenoble reached 5.3 (G1); storm days (G1+) this week: 2.
Grenoble sits at geomagnetic latitude 46.3°. The nearest magnetic observatory continuously recording the field is Lviv, 1448 km away. Population 158,552.
Grenoble is located at mid-latitudes (46.3°), 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 Grenoble (46.3°, 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 Grenoble during the last 24 hours. Kp reached a maximum of 2.3 around 02:00 local time and dipped to 0.7. The planetary trend over the past 6 hours is steady — no sharp changes near Grenoble right now. So far this month the planet has logged 2 days with a G1 or stronger geomagnetic storm.
Aurora visibility threshold for Grenoble. At a geomagnetic latitude of 46.3°, the minimum Kp giving a realistic chance of visible auroras above Grenoble is about Kp ≥ 7. 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 Grenoble right now. Temperature +28.4°C, atmospheric pressure 743.8 mm Hg (991.6 hPa), cloud cover 5%, humidity 40%, wind 3.4 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 Grenoble page shows both indicators side by side. Weather data from Open-Meteo (CC BY).
Aurora viewing window for Grenoble tonight. Sunset is at 19:31 local time, sunrise tomorrow at 05:48. Moon phase — waxing gibbous with 84% disk illumination. The Moon is close to full tonight, so moonlight will be strong and faint auroras will be harder to spot — wait for Kp ≥ 6 or pick a darker site..