![GOES-17 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/pac_vis-20200424_191025.png)
GOES-17 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]
1-minute
Mesoscale Domain Sector GOES-17
(GOES-West) “Red” Visible (
0.64 µm) and “Clean” Infrared Window (
10.35 µm) images
(above) showed the circulation of Tropical Invest 90E in the East Pacific Ocean on 24 April 2020. The low-level circulation center appeared to be located about 100 miles southwest of the 18 UTC surface analysis position.
GOES-17 Visible images with a plot of Deep-Layer Wind Shear from the CIMSS Tropical Cyclones site (below) indicated that Invest 90E was embedded within an environment of low shear — the National Hurricane Center gave the feature an 80% chance of further developing into a tropical depression within 48 hours.
![GOES-17 “Red” Visible (0.64 µm) with a plot of Deep-Layer Wind Shear at 23 UTC images [click to enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/200424_23utc_goes17_visible_shear_Invest90E_anim.gif)
GOES-17 “Red” Visible (0.64 µm) images, with a plot of Deep-Layer Wind Shear at 23 UTC [click to enlarge]
VIIRS True Color RGB and Infrared Window (11.45 µm) images from NOAA-20 and Suomi NPP as viewed using
RealEarth (below) revealed tendrils of transverse banding along the western and northern periphery if the disturbance.
![VIIRS True Color RGB and Infrared Window (11.45 µm) images from NOAA-20 and Suomi NPP [click to enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/200424_noaa20_suomiNPP_trueColorRGB_infraredWindow_East_Pacific_Invest90E_anim.gif)
VIIRS True Color RGB and Infrared Window (11.45 µm) images from NOAA-20 and Suomi NPP [click to enlarge]
===== 25 April Update =====
![GOES-17 “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/G17_IR_TD_ONE_25APR2020_B13_2020116_150032_GOES-17_0001PANEL_FRAME00032.GIF)
GOES-17 “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]
GOES-17 Infrared images
(above) showed the period when the disturbance became classified as Tropical Depression One-E at
15 UTC — making this the earliest tropical cyclone on record in the East Pacific basin during the satellite era.
![GOES-17 “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/pac_ir-20200425_120032.png)
GOES-17 “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]
GOES-17 Infrared images with plots of tropical surface analyses
(above) indicated that TD One-E was situated just north of the Intertropical Convergence Zone (
ITCZ). The
MIMIC-TPW product
(below) showed that the tropical depression was tapping moisture from the ITCZ and drawing it northward.
![MIMIC Total Precipitable Water product [click to enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/200424_200425_mimicTPW_East_Pacific_anim.gif)
MIMIC Total Precipitable Water product [click to enlarge]
GOES-17 Visible images
(below) revealed an exposed low-level circulation that was displaced north-northwest of the primary cluster of deep convection.
![GOES-17 “Red” Visible (0.64 µm) images [click to play animation | MP4]](https://cimss.ssec.wisc.edu/satellite-blog/images/2020/04/G17_VIS_TD_ONE_25APR2020_B2_2020116_150032_GOES-17_0001PANEL_FRAME00009.GIF)
GOES-17 “Red” Visible (0.64 µm) images [click to play animation | MP4]