Reports Report 5520j (Event 5520-2021)

Observer
Name Sheryl D
Experience Level 1/5
Remarks I was heading West on hwy 10 & the street coordinates are a guess. It was so unusual an experience I called my husband right then to tell what I saw. Just checked & called him at 11:18am. I'd be very interested to know if anyone else saw it & what it was.
Location
Address Phoenix, AZ
Latitude 33° 24' 36.45'' N (33.410126°)
Longitude 111° 59' 35.58'' W (-111.993216°)
Elevation 344.884979m
Time and Duration
Local Date & Time 2021-09-08 11:20 MST
UT Date & Time 2021-09-08 18:20 UT
Duration ≈1.5s
Direction
Moving direction From up left to down right
Descent Angle 94°
Moving
Facing azimuth 271.48°
First azimuth 253.67°
First elevation 53°
Last azimuth 320.91°
Last elevation 55°
Brightness and color
Stellar Magnitude -8
Color White flash bright at end
Concurrent Sound
Observation Unknown
Remarks -
Delayed Sound
Observation Unknown
Remarks -
Persistent train
Observation Unknown
Duration -
Length -
Remarks -
Terminal flash
Observation Yes
Remarks Fast dark streak approx south to north ending in a very bright brief flash visible in a very hazy sky. Straight in front of me as I drove West on the freeway. Don't think a trail lingered. 1st time seeing anything like this in daylight. Had to keep my eyes on traffic around me but briefly checked the sky to see if there were others. Not sure if meteor, rocket or ?
Fragmentation
Observation No
Remarks -