Alert archive / Missouri / Areal Flood Warnings in 2021
Areal Flood Warning 2, NWS St. Louis, MO
NWS St. Louis, MO issued this areal flood warning at Jun 20, 2021, 2:13 AM CDT for Audrain County, Boone County, Monroe County, Missouri. It was in force for 3 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
- Jun 20, 2021, 2:13 AM CDT (07:13 UTC)
- Expired
- Jun 20, 2021, 5:38 AM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Audrain County, MO, Boone County, MO, Monroe County, MO
The radar
The St Louis radar (KLSX), 125 km from the middle of the area, began a volume at 07:16 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, 7.2 hours before the alert went out and 293 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
- 2652 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
060
WGUS43 KLSX 200713
FLWLSX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
213 AM CDT Sun Jun 20 2021
MOC007-019-137-201315-
/O.NEW.KLSX.FA.W.0002.210620T0713Z-210620T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Audrain MO-Boone MO-Monroe MO-
213 AM CDT Sun Jun 20 2021
The National Weather Service in St Louis has issued a
* Flood Warning for...
Audrain County in central Missouri...
Northeastern Boone County in central Missouri...
Southwestern Monroe County in northeastern Missouri...
* Until 815 AM CDT Sunday.
* At 213 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. Flooding is ongoing in the warned area. Between 2
and 4 inches of rain have fallen.
Additional rainfall amounts up to 1 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.
&&
LAT...LON 3925 9231 3944 9231 3934 9172 3932 9172
3931 9155 3915 9161 3915 9163 3906 9164
3906 9180 3916 9248 3925 9243
$$
MRM1 follow-up statement
602
WGUS83 KLSX 201038
FLSLSX
Flood Statement
National Weather Service St Louis MO
538 AM CDT Sun Jun 20 2021
MOC007-019-137-201048-
/O.CAN.KLSX.FA.W.0002.000000T0000Z-210620T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Audrain MO-Boone MO-Monroe MO-
538 AM CDT Sun Jun 20 2021
...FLOOD WARNING IS CANCELLED FOR AUDRAIN AND NORTHEASTERN BOONE
COUNTIES IN CENTRAL MISSOURI AND SOUTHWESTERN MONROE COUNTY IN
NORTHEASTERN MISSOURI...
Law enforcement has reported that flood waters have receded. The
heavy rain has ended and flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3925 9231 3944 9231 3934 9172 3932 9172
3931 9155 3915 9161 3915 9163 3906 9164
3906 9180 3916 9248 3925 9243
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 48 min |
| Jun 19, 7:31 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 44 min |
| Jun 19, 8:00 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 21 min |
| Jun 19, 8:42 PM CDT | Flash Flood Warning | LSX | Audrain, Boone, Monroe | 6 hr |
| Jun 19, 9:33 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 42 min |
| Jun 19, 11:49 PM CDT | Areal Flood Warning | LSX | Marion, Pike, Ralls | 11 hr |
| Jun 20, 1:39 AM CDT | Flash Flood Warning | LSX | Boone | 5 hr |
Nearby
Areal Flood Warnings in Missouri, 2021Every areal flood warning in 2021
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.