Alert archive / Washington / Flood Watches in 2008
Flood Watch 2, NWS Seattle, WA
NWS Seattle, WA issued this flood watch at Aug 21, 2008, 11:07 AM PDT for Whatcom County, Washington. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 2008, 11:07 AM PDT (18:07 UTC)
- Expired
- Aug 21, 2008, 4:37 PM PDT
- In force
- 6 hr
- Issued by
- NWS Seattle, WA
- Flood severity
- None
County Whatcom County, WA
The radar
The Seattle radar (KATX), 84 km from the middle of the area, began a volume at 18:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 6.1 hours before the alert went out and 424 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 8:57 PM PDT | Small Craft Advisory for Hazardous Seas | SEW | 17 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.