Alert archive / Missouri / Flash Flood Watches in 2019
Flash Flood Watch 19, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at Sep 27, 2019, 3:40 PM CDT for 6 counties in Missouri; Adams County, Brown County, Pike County, Illinois. It took effect at Sep 27, 2019, 7:00 PM CDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Sep 27, 2019, 3:40 PM CDT (20:40 UTC)
- In effect from
- Sep 27, 2019, 7:00 PM CDT
- Expired
- Sep 28, 2019, 5:13 AM CDT
- In force
- 10 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Adams County, IL, Brown County, IL, Pike County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 146 km from the middle of the area, began a volume at 20:41 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, 8.7 hours before the alert went out and 218 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
- 1100 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 346 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Sep 27, 12:58 PM CDT, 2 hours 42 minutes earlier.
Area forecast discussion, Sep 27, 12:58 PM CDT, 2 hours 42 minutes before
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</html>Hazardous weather outlook, Sep 27, 4:22 AM CDT, 11 hours 18 minutes before
Hazardous Weather Outlook National Weather Service Saint Louis MO 422 AM CDT Fri Sep 27 2019 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-280930- Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO- Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO- Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO- Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO- Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL- Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO- Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO- Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO- 422 AM CDT Fri Sep 27 2019 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Today and tonight. Scattered thunderstorms are expected this morning, mainly across northeast Missouri and west central Illinois. Thunderstorms are likely from late this afternoon through tonight, especially across northeast Missouri and west central Illinois. Some of these storms could be strong to severe with damaging wind, large hail, and localized flash flooding. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a chance of thunderstorms over parts of the area Saturday and Sunday. There is another chance of thunderstorms Tuesday night and Wednesday across much of the area. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late this afternoon and this evening. BSH
In the hours before
Special weather statement, Sep 27, 11:30 AM CDT, 4 hours 10 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 |
|---|---|---|---|---|
| Sep 27, 8:41 AM CDT | Special Weather Statement | LSX | Lewis | 34 min |
| Sep 27, 11:23 AM CDT | River Flood Warning | LSX | Pike | 44 days |
| Sep 27, 11:30 AM CDT | Special Weather Statement | LSX | Knox | 30 min |
| Sep 27, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 48 min |
| Sep 27, 6:52 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 53 min |
Nearby
Flash Flood Watches in Missouri, 2019Flash Flood Watches in Illinois, 2019Every flash flood watch in 2019
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.