Alert archive / Missouri / Flash Flood Warnings in 2018

Flash Flood Warning 21, NWS Springfield, MO

June 8, 2018Shannon County, Missouri

NWS Springfield, MO issued this flash flood warning at Jun 8, 2018, 7:07 PM CDT for Shannon County, Missouri. It was in force for 2 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 8, 2018, 7:07 PM CDT (00:07 UTC)
Expired: Jun 8, 2018, 9:08 PM CDT
In force: 2 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

County Shannon County, MO

The radar

The Springfield radar (KSGF), 172 km from the middle of the area, began a volume at 00:07 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, 0.1 hours before the alert went out and 210 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1890 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1628 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

762 
WGUS53 KSGF 090007
FFWSGF
MOC203-090300-
/O.NEW.KSGF.FF.W.0021.180609T0007Z-180609T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
707 PM CDT FRI JUN 8 2018

The National Weather Service in Springfield has issued a

* Flash Flood Warning for...
  West central Shannon County in south central Missouri...

* Until 1000 PM CDT

* At 704 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain has
  already fallen. Flash flooding is expected to begin shortly.

* Creeks, streams, and low water crossings will be especially
  susceptible to the dangers of flash flooding.
  Locations in the warning include...Bay Creek and Alley Spring.

Flood waters are moving down Alley Branch and the upper Jacks Fork 
upstream from Alley Spring.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3729 9141 3715 9130 3704 9156 3722 9164

$$

Terry

1 follow-up statement

238 
WGUS73 KSGF 090208
FFSSGF

Flash Flood Statement
National Weather Service Springfield MO
908 PM CDT FRI JUN 8 2018

MOC203-090217-
/O.CAN.KSGF.FF.W.0021.000000T0000Z-180609T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shannon MO-
908 PM CDT FRI JUN 8 2018

...THE FLASH FLOOD WARNING FOR WEST CENTRAL SHANNON COUNTY IS
CANCELLED...

The threat for rapid rises in water levels has diminished. Flash 
flooding is no longer expected to pose a threat to life or property. 
Please continue to heed any remaining road closures.

LAT...LON 3729 9141 3715 9130 3704 9156 3722 9164

$$

Terry

The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 7:13 PM CDT	Flash Flood Warning	SGF	Howell	115 min
Jun 9, 5:53 AM CDT	Special Weather Statement	SGF	Dent	52 min
Jun 9, 6:04 AM CDT	Severe Thunderstorm Warning	SGF	Dent	41 min
Jun 9, 7:04 AM CDT	Special Weather Statement	SGF	Shannon	56 min
Jun 9, 8:00 AM CDT	Special Weather Statement	SGF	Shannon	60 min
Jun 9, 8:43 AM CDT	Areal Flood Advisory	SGF	Shannon	6 hr
Jun 9, 9:19 AM CDT	Areal Flood Advisory	SGF	Dent	6 hr
Jun 9, 9:40 AM CDT	Special Weather Statement	SGF	Vernon	65 min
Jun 9, 12:44 PM CDT	River Flood Warning	SGF	Shannon	15 hr
Jun 9, 2:21 PM CDT	Severe Thunderstorm Warning	SGF	Greene, Webster	28 min

Nearby

Flash Flood Warnings in Missouri, 2018 Every flash flood warning in 2018

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.