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Prediction for CME (2024-05-03T02:48:00-CME-001)

CME Observed Time: 2024-05-03T02:48Z
iSWAS Layout URL: https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/30409/-1
CME Note: A faint CME with narrow brighter front with filamentary structures (likely the bulk) and a wider fainter but slower front (likely the shock). The source is the X1.6 class flare (N26E05) from AR 3663 peaking at 2024-05-03T02:22Z and an eruption with a faint narrow ejecta seen in AIA 193 directed mostly towards the NE and a faint dimming mostly NE of the active region and post-eruptive arcades seen in AIA 193. Arrival signature: gradual CME arrival signature (likely a flank impact/glancing blow) which on 2024-05-06 is followed by the onset of a high speed stream. There is no shock but a steady growth in magnetic field to 16nT on 2024-05-06, accompanied by rotation of all 3 magnetic field components, with a prolonged bout of negative Bz (below 10 nT) on the evening of 2024-05-05. The ICME signature also includes an initial build up of ion density and temperature, followed by drops in both parameters.
CME Shock Arrival Time: 2024-05-05T11:30Z
Observed Geomagnetic Storm Parameters due to CME:
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Predicted Arrival Time: 2024-05-05T09:00Z (-7.0h, +7.0h)
Confidence that the CME will arrive: 60.0%
Predicted geomagnetic storm max Kp range due to CME: 5.0 - 7.0
Prediction Method: WSA-ENLIL + Cone (Met Office)
Prediction Method Note:

Met Office ENLIL settings.
ENLIL version: 2.7
Resolution: medium-res (512x60x180) (X1=0.1-1.7/uniform X2=30.-150./uniform X3=0.-360./uniform)
Ambient settings: a3b2-sa1
WSA version: 4.5
GONG: mrzqs
Note that this arrival time forecast is based on the simulation but is then adjusted by a human-in-the-loop.

Please specify following CME input parameters.
Time at 21.5Rs boundary: 2024-05-03 06:46
Radial velocity (km/s): 900
Longitude (deg): 17
Latitude (deg): 27
Half-angular width (deg): 41

Notes: Northward directed CME assw X1.6 flare from AR3663. Brightest portion of CME heading well north, but wider bulk of CME captured using SOHO and STEREO. Limited frames, so worth another look when more imagery available. 
Space weather advisor: Rebecca Spalton & Stuart Webster

Lead Time: 41.40 hour(s)
Difference: 2.50 hour(s)
Prediction submitted by Met Office (Met Office) on 2024-05-03T18:06Z

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