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added rest of harlan dow data
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acblackford authored Nov 20, 2024
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146 changes: 146 additions & 0 deletions datasets/tornadoes2024-dow.data.mdx
Original file line number Diff line number Diff line change
Expand Up @@ -257,6 +257,152 @@ layers:
spatialExtent: Local
temporalResolution: N/A
unit: dBZ
compare:
datasetId: tornadoes-2024-dow
layerId: tornadoes-2024-dow-v-harlan
mapLabel: |
::js ({ dateFns, datetime, compareDatetime }) => {
return `${dateFns.format(datetime, 'DD LLL yyyy')}`;
}
- id: tornadoes-2024-dow-v-greenfield
stacCol: tornadoes-2024-dow-v-greenfield
name: DOW7 Velocity (Ground; Harlan, IA)
type: raster
description: "Velocities (m/s) of the EF-3 Harlan, IA tornado on April 26, 2024 collected by DOW7. Scan taken at 23:08:12."
initialDatetime: newest
zoomExtent:
- 0
- 20
sourceParams:
colormap_name: seismic
nodata: -32768
rescale:
- -75
- 75
legend:
type: gradient
min: "-75 m/s"
max: "75 m/s"
stops:
- [ "#0000FF", -75 ] # Deep blue (negative extreme)
- [ "#3399FF", -50 ] # Light blue
- [ "#66CCFF", -25 ] # Very light blue
- [ "#FFFFFF", 0 ] # White (zero velocity)
- [ "#FF9999", 25 ] # Light pink
- [ "#FF6666", 50 ] # Light red
- [ "#FF0000", 75 ] # Deep red (positive extreme)
info:
source: Doppler on Wheels (DOW)
spatialExtent: Local
temporalResolution: N/A
unit: m/s
compare:
datasetId: tornadoes-2024-dow
layerId: tornadoes-2024-dow-refl-harlan
mapLabel: |
::js ({ dateFns, datetime, compareDatetime }) => {
return `${dateFns.format(datetime, 'DD LLL yyyy')}`;
}
- id: tornadoes-2024-dow-rhohv-harlan
stacCol: tornadoes-2024-dow-rhohv-harlan
name: DOW7 Correlation Coefficient (Harlan, IA)
type: raster
description: "Correlation Coefficient values from the EF-3 Harlan, IA tornado on April 26, 2024 collected by DOW7. Scan taken at 23:08:12."
initialDatetime: newest
zoomExtent:
- 0
- 20
sourceParams:
colormap_name: turbo
nodata: -32768
rescale:
- 0
- 1
legend:
type: gradient
min: "0"
max: "1"
stops:
- [ "#30123B", 0.0 ] # Deep purple (low correlation)
- [ "#443983", 0.2 ] # Dark blue
- [ "#31678E", 0.4 ] # Cyan
- [ "#35B779", 0.6 ] # Green
- [ "#FDE725", 0.8 ] # Yellow
- [ "#FF0000", 1.0 ] # Red (high correlation)
info:
source: Doppler on Wheels (DOW)
spatialExtent: Local
temporalResolution: N/A
unit: unitless

- id: tornadoes-2024-dow-sw-harlan
stacCol: tornadoes-2024-dow-sw-harlan
name: DOW7 Spectrum Width (Harlan, IA)
type: raster
description: "Spectrum Width values (m/s) from the EF-3 Harlan, IA tornado on April 26, 2024 collected by DOW7. Scan taken at 23:08:12."
initialDatetime: newest
zoomExtent:
- 0
- 20
sourceParams:
colormap_name: rdpu
nodata: -32768
rescale:
- 0
- 25
legend:
type: gradient
min: "0 m/s"
max: "25 m/s"
stops:
- [ "#f7f4f9", 0 ] # Light pink (low spectrum width)
- [ "#fddbc7", 5 ] # Very light pink
- [ "#f4a582", 10 ] # Pinkish-orange
- [ "#d6604d", 15 ] # Orange-red
- [ "#b2182b", 20 ] # Deep red
- [ "#67001f", 25 ] # Deepest purple (high spectrum width)
info:
source: Doppler on Wheels (DOW)
spatialExtent: Local
temporalResolution: N/A
unit: m/s

- id: tornadoes-2024-dow-zdr-harlan
stacCol: tornadoes-2024-dow-zdr-harlan
name: DOW7 Differential Reflectivity (Harlan, IA)
type: raster
description: "Differential Reflectivity values (dB) from the EF-3 Harlan, IA tornado on April 26, 2024 collected by DOW7. Scan taken at 23:08:12."
initialDatetime: newest
zoomExtent:
- 0
- 20
sourceParams:
colormap_name: nipy_spectral
nodata: -32768
rescale:
- -5
- 7
legend:
type: gradient
min: "-5 dB"
max: "7 dB"
stops:
- [ "#000080", -5 ] # Dark blue (low ZDR)
- [ "#0000FF", -3 ] # Blue
- [ "#00FFFF", -1 ] # Cyan
- [ "#00FF00", 1 ] # Green
- [ "#FFFF00", 3 ] # Yellow
- [ "#FFA500", 5 ] # Orange
- [ "#FF0000", 6 ] # Red
- [ "#800080", 7 ] # Purple (high ZDR)
info:
source: Doppler on Wheels (DOW)
spatialExtent: Local
temporalResolution: N/A
unit: dB


---

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22 changes: 18 additions & 4 deletions stories/tornadoes2024.stories.mdx
Original file line number Diff line number Diff line change
Expand Up @@ -1022,13 +1022,27 @@ Intense tornadoes are defined as those that receive an EF-3 rating or higher. Fr
<Prose>
##### Minden-Harlan, IA EF-3
The final intense tornado of the day, likely stronger than its official rating, hit Pottawattamie and Shelby Counties in Iowa, covering 40.9 miles with peak winds of 160 mph. Beginning at 5:25 PM and lifting at 6:29 PM, the tornado caused one fatality and three injuries. Starting east of McClelland, the tornado intensified near Sycamore Road and grew to 800 yards wide as it approached Minden, causing severe EF-3 damage to homes and buildings. Multiple vortices were observed in Minden, where it caused the most destruction, leading to all of the reported casualties. Northeast of Minden, it widened to nearly a mile, flipping a semi-truck on Interstate 80 and damaging homes, trees, and vehicles along the way. Near Harlan, Doppler radar detected wind speeds up to 224 mph just above the ground, suggesting potential for EF-5 damage. The tornado weakened near Defiance, eventually dissipating at the Crawford-Shelby county line, with radar indicating it may have continued briefly into Crawford County.

DOW Data?
</Prose>
</Block>



<Block type='wide'>
<Figure>
<Map
datasetId='tornadoes-2024-dow'
layerId='tornadoes-2024-dow-refl-harlan'
dateTime='2024-04-26'
zoom={12.5}
center={[-95.3994, 41.6852]}
compareDateTime='2024-04-26'
/>
<Caption
attrAuthor='NASA'
attrUrl='https://nasa.gov/'
>
Comparison of DOW-collected reflectivity and velocity values from the Minden-Harlan, Iowa EF-3 tornado on April 26, 2024 as it passed northwest of Harlan. Negative velocity values indicate the wind is moving towards the radar, while positive values indicate the wind is moving away from the radar.
</Caption>
</Figure>
</Block>

<Block>
<Prose>
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