Alert archive / Missouri / Flash Flood Warnings in 2017
Flash Flood Warning 20, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 22, 2017, 12:47 AM CDT for Shelby County, Missouri. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2017, 12:47 AM CDT (05:47 UTC)
- Expired
- Aug 22, 2017, 8:45 AM CDT
- In force
- 8 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Shelby County, MO
The radar
The St Louis radar (KLSX), 164 km from the middle of the area, began a volume at 05:49 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 00:00Z, 5.8 hours before the alert went out and 239 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
- 366 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 1050 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
623
WGUS53 KLSX 220547
FFWLSX
MOC205-221345-
/O.NEW.KLSX.FF.W.0020.170822T0547Z-170822T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
1247 AM CDT TUE AUG 22 2017
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Eastern Shelby County in northeastern Missouri...
* Until 845 AM CDT Tuesday.
* At 1247 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Two to three inches of rain
have fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Shelbina, Shelbyville, Emden, Hunnewell and Bethel.
Additional rainfall amounts of up to 1-2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 3981 9185 3966 9185 3970 9213 3985 9215
3989 9202
$$
Gosselin2 follow-up statements
105
WGUS73 KLSX 220937
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
437 AM CDT TUE AUG 22 2017
MOC205-221345-
/O.CON.KLSX.FF.W.0020.000000T0000Z-170822T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shelby MO-
437 AM CDT TUE AUG 22 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 AM CDT FOR
EASTERN SHELBY COUNTY...
At 436 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Two to four inches of rain have fallen.
Some locations that will experience flooding include...
Shelbina, Shelbyville, Emden, Hunnewell and Bethel.
Additional rainfall amounts of up to a half inch are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 3981 9185 3966 9185 3970 9213 3985 9215
3989 9202
$$
Gosselin072
WGUS73 KLSX 221350
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
850 AM CDT TUE AUG 22 2017
MOC205-221359-
/O.EXP.KLSX.FF.W.0020.000000T0000Z-170822T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shelby MO-
850 AM CDT TUE AUG 22 2017
...THE FLASH FLOOD WARNING FOR EASTERN SHELBY COUNTY HAS EXPIRED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3981 9185 3966 9185 3970 9213 3985 9215
3989 9202
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:19 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Cole, Moniteau | 41 min |
| Aug 22, 12:36 AM CDT | Areal Flood Advisory | LSX | Marion | 6 hr |
| Aug 22, 8:57 AM CDT | River Flood Warning | LSX | Cole | 62 hr |
Nearby
Flash Flood Warnings in Missouri, 2017Every flash flood warning in 2017
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.