Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 83, NWS Springfield, MO
NWS Springfield, MO issued this flash flood warning at Aug 21, 2021, 3:38 AM CDT for Cedar County, St. Clair County, Vernon County, Missouri. It was in force for 6 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 21, 2021, 3:38 AM CDT (08:38 UTC)
- Expired
- Aug 21, 2021, 9:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS Springfield, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cedar County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 93 km from the middle of the area, began a volume at 08:39 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
Springfield, MO (KSGF), launched 00:00Z, 8.6 hours before the alert went out and 124 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
- 2926 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1041 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
892
WGUS53 KSGF 210838
FFWSGF
MOC039-185-217-211445-
/O.NEW.KSGF.FF.W.0083.210821T0838Z-210821T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
338 AM CDT Sat Aug 21 2021
The National Weather Service in Springfield has issued a
* Flash Flood Warning for...
Northern Cedar County in southwestern Missouri...
St. Clair County in west central Missouri...
Vernon County in west central Missouri...
* Until 945 AM CDT Saturday.
* At 337 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
This warning will remain over mainly rural areas of northern Cedar,
St. Clair and Vernon Counties.
Additional rainfall amounts of one to two inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3806 9461 3805 9424 3803 9423 3805 9421
3805 9415 3803 9406 3821 9405 3820 9356
3822 9356 3820 9350 3792 9351 3791 9357
3783 9357 3781 9363 3772 9362 3776 9462
FLASH FLOOD...RADAR INDICATED
$$
Hatch1 follow-up statement
847
WGUS73 KSGF 211437
FFSSGF
Flash Flood Statement
National Weather Service Springfield MO
937 AM CDT Sat Aug 21 2021
MOC039-185-217-211447-
/O.EXP.KSGF.FF.W.0083.000000T0000Z-210821T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cedar MO-St. Clair MO-Vernon MO-
937 AM CDT Sat Aug 21 2021
...THE FLASH FLOOD WARNING FOR NORTHERN CEDAR...ST. CLAIR AND VERNON
COUNTIES WILL EXPIRE AT 945 AM CDT SATURDAY...
The heavy rain has ended. The threat for rapid rises in water levels
has diminished. Flash flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3806 9461 3805 9424 3803 9423 3805 9421
3805 9415 3803 9406 3821 9405 3820 9356
3822 9356 3820 9350 3792 9351 3791 9357
3783 9357 3781 9363 3772 9362 3776 9462
$$
RothsteinThe office that day
Everything else NWS Springfield, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 12:18 AM CDT | Special Weather Statement | SGF | Benton, Morgan | 27 min |
Nearby
Flash Flood Warnings in Missouri, 2021Every flash 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.