Alert archive / Missouri / Flash Flood Watches in 2008
Flash Flood Watch 17, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at Jul 27, 2008, 3:45 PM CDT for 8 counties in Missouri; Adams County, Brown County, Pike County, Illinois. It took effect at Jul 27, 2008, 7:01 PM CDT. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2008, 3:45 PM CDT (20:45 UTC)
- In effect from
- Jul 27, 2008, 7:01 PM CDT
- Expired
- Jul 28, 2008, 10:00 AM CDT
- In force
- 15 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Adams County, IL, Brown County, IL, Pike County, IL, Audrain County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 136 km from the middle of the area, began a volume at 20:49 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
Davenport, (KDVN), launched 12:00Z, 8.8 hours before the alert went out and 228 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
- 1405 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before this flash flood watch went out at Jul 27, 12:26 PM CDT, 3 hours 19 minutes earlier.
Area forecast discussion, Jul 27, 12:26 PM CDT, 3 hours 19 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 8:05 PM CDT | Areal Flood Warning | LSX | Monroe, Shelby | 12 hr |
| Jul 26, 8:15 PM CDT | Areal Flood Warning | LSX | Lincoln, Montgomery | 11 hr |
| Jul 26, 10:25 PM CDT | River Flood Warning | LSX | Lincoln | 13 hr |
| Jul 27, 7:50 AM CDT | Areal Flood Warning | LSX | Monroe, Shelby | 14 hr |
Nearby
Flash Flood Watches in Missouri, 2008Flash Flood Watches in Illinois, 2008Every flash flood watch in 2008
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.