- Home
- Forecast
- Radar
- Maps
- WX-Data
- WX-Misc.
- Astronomy
- Fire
- About
- Links
Air Quality
| Advisories / Alerts |
| Severe Wx Summary! | |
 |
|
 Gale Warning Red Flag WarningCurrent Fire Status Small Craft Advisory Hazardous Seas Warning Hazardous Weather Outlook |
|
|
|
 |
|
| Mon, May 10, 2021 - 9:19pm |
|
|
|
|
|
|
Info Links
|
|||||
|
|
|
|
|
|||||
 |
| Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 130 Issued at 2200Z on 10 May 2021 |
| IA. Analysis of Solar Active Regions and Activity from 09/2100Z to
10/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk. |
| IB. Solar Activity Forecast Solar activity is likely to be low with a slight chance for an M-class flare on days one, two, and three (11 May, 12 May, 13 May). |
| IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 367 km/s at 10/0422Z. Total IMF reached 12 nT at 10/0514Z. The maximum southward component of Bz reached -5 nT at 10/0741Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 619 pfu. |
| IIB. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on day one (11 May) and quiet to active levels on days two and three (12 May, 13 May). |
Product: 3-Day Forecast - Issued: 2021 May 11 0030 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.
Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA Scale levels). The greatest expected 3 hr Kp for May 11-May 13 2021 is 4 (below NOAA Scale levels).
|
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||
|
Rationale: There is a chance for G1 (Minor) geomagnetic storms on 13 May and possibly on 12 May if the CME is moving faster than anticipated.
Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-16 over the past 24 hours, was below S-scale storm level thresholds.
|
Rationale: No S1 (Minor) or greater solar radiation storms are expected. No significant active region activity favorable for radiation storm production is forecast.
Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
|
|||||||||||||
Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.
Product: 27 day Space Weather Outlook - Issued: 2021 May 10 0452 UTC
|
|
|
|||||||
| This plot shows 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites. | The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment. |
|
|
|
|
|||||||
| Large Angle and Spectrometric Coronagraph (LASCO). | Real-Time Solar Wind data broadcast from NASA's ACE satellite. |
|
|||||||
Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere. SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region (which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles. The power input estimate is converted to an auroral activity index that ranges from 1 to 10. |
|
|||||||||||||||||||
The sun is constantly monitored for sun spots and coronal mass ejections. EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere. |
|
|
|
|||||||
|
|||||||
| This plot shows the Solar Cycle Sun Spot Number Progression. | This plot shows the F10.7cm Radio Flux Progression. |
|
|||||||
| This plot shows the Solar Cycle Ap Progression. | Sunspot Cycle 22, 23, and 24 |
The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun.
Solar minimum occurred in December, 2008.
Solar maximum was expected to occur in May, 2013.
 |
|
|
|
| Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach. |
| Source: Space Weather.com |
| Star Clusters M35 and NGC 2158 | |||
|
|||
2021 May 10 |
|||
Explanation: Clusters of stars can be near or far, young or old, diffuse or compact. The featured image shows two quite contrasting open star clusters in the same field. M35, on the lower left, is relatively nearby at 2800 light years distant, relatively young at 150 million years old, and relatively diffuse, with about 2500 stars spread out over a volume 30 light years across. Bright blue stars frequently distinguish younger open clusters like M35. Contrastingly, NGC 2158, on the upper right, is four times more distant than M35, over 10 times older, and much more compact. NGC 2158's bright blue stars have self-destructed, leaving cluster light to be dominated by older and yellower stars. In general, open star clusters are found in the plane of our Milky Way Galaxy, and contain anywhere from 100 to 10,000 stars -- all of which formed at nearly the same time. Both open clusters M35 and NGC 2158 can be found together with a small telescope toward the constellation of the Twins (Gemini). |
|||
| High Resolution Image | |||
| Tomorrow’s Image: beyond uluru | |||
| Credit & Copyright: CFHT, Coelum, MegaCam, J.-C. Cuillandre (CFHT) & G. A. Anselmi (Coelum) | |||
| Courtesy of Astronomy Picture of the Day Index - Main Page & Astronomy Picture of the Day |
Space Weather Images and Information (excluded from copyright) courtesy of: NOAA / NWS Space Weather Prediction Center, Mauna Loa Solar Observatory (HAO/NCAR), and SOHO (ESA & NASA).
Past 7 Days of Astronomy Pic of the DayPowered by Space Weather PHP script by Mike Challis
additions by Martin of Hebrides Weather, Ken True of Saratoga Weather,
Jerry Wilkins of Southeast Lincoln Weather and Jeremy Dyde of Jerbils Weather
Ambient Weather VWS v14.00 Top