Alert archive / Missouri / Flash Flood Warnings in 2017

Flash Flood Warning 78, NWS Springfield, MO

August 22, 2017Benton County, Morgan County, Missouri

NWS Springfield, MO issued this flash flood warning at Aug 22, 2017, 3:44 AM CDT for Benton County, Morgan County, Missouri. It was in force for 7 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 22, 2017, 3:44 AM CDT (08:44 UTC)
Expired: Aug 22, 2017, 10:45 AM CDT
In force: 7 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

Counties Benton County, MO, Morgan County, MO

The radar

The Pleasant Hill radar (KEAX), 124 km from the middle of the area, began a volume at 08:46 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.

What was reported inside it

Time	Report	Where	Remark
Aug 22, 8:05 AM CDT	FLASH FLOOD	1 Se Florence, MO	MODOT REPORTS ROUTE BB CLOSED DUE TO FLASH FLOODING OF GABRIEL CREEK SOUTHEAST OF FLORENCE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.7 hours before the alert went out and 175 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: 1899 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1285 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

498 
WGUS53 KSGF 220844
FFWSGF
MOC015-141-221545-
/O.NEW.KSGF.FF.W.0078.170822T0844Z-170822T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
344 AM CDT TUE AUG 22 2017

The National Weather Service in Springfield has issued a

* Flash Flood Warning for...
  Benton County in central Missouri...
  Morgan County in central Missouri...

* Until 1045 AM CDT Tuesday

* At 339 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to three 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.

This warning includes the Warsaw, Lincoln, Cole Camp, Versailles and 
Gravois Mills areas.

This warning includes but is not limited to the following low water
crossings...
Route V at Deer Creek near Hastain...
Route DD at Knobby Creek 6 miles northeast of Edwards...
Route BB at Gabriel Creek near Florence...
Route WW at Archer Creek northeast of Lakeview Heights...
and Route O near Laurie.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

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 3868 9284 3860 9284 3845 9265 3835 9263
      3835 9269 3822 9270 3822 9276 3819 9277
      3820 9296 3821 9293 3823 9296 3819 9301
      3822 9299 3827 9307 3806 9307 3807 9350
      3808 9350 3851 9351 3853 9307 3869 9306

$$

Foster

1 follow-up statement

610 
WGUS73 KSGF 221223
FFSSGF

Flash Flood Statement
National Weather Service Springfield MO
723 AM CDT TUE AUG 22 2017

MOC015-141-221545-
/O.CON.KSGF.FF.W.0078.000000T0000Z-170822T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton MO-Morgan MO-
723 AM CDT TUE AUG 22 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR
BENTON AND MORGAN COUNTIES...

At 719 AM CDT, Doppler radar indicated that rainfall was diminishing 
across the warned area but light to moderate showers continued. Two 
to four inches of rain has fallen across the warned area with the 
highest amounts across northern Benton County.

* Creeks, streams, and low water crossings will be especially
  susceptible to the dangers of flash flooding.

This warning includes but is not limited to the following low water
crossings...
Route V at Deer Creek near Hastain...
Route DD at Knobby Creek 6 miles northeast of Edwards...
Route BB at Gabriel Creek near Florence...
Route WW at Archer Creek northeast of Lakeview Heights...
and Route O near Laurie.

Additional rainfall amounts up to one half inch will be possible 
before the rain ends this morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3868 9284 3859 9283 3845 9265 3835 9263
      3835 9269 3822 9270 3822 9276 3819 9278
      3820 9295 3822 9293 3823 9296 3819 9300
      3822 9299 3827 9307 3806 9307 3808 9350
      3851 9351 3853 9307 3869 9306

$$

Foster

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 3:16 AM CDT	Areal Flood Advisory	SGF	Benton, Morgan	6 hr
Aug 22, 5:07 AM CDT	Flash Flood Warning	SGF	St. Clair	6 hr
Aug 22, 5:31 AM CDT	Areal Flood Advisory	SGF	Cedar, Vernon	4 hr
Aug 22, 7:35 AM CDT	Areal Flood Advisory	SGF	Miller	6 hr
Aug 22, 8:56 AM CDT	River Flood Warning	SGF	Bates, Vernon	6 days
Aug 22, 9:03 AM CDT	Areal Flood Advisory	SGF	Hickory	6 hr
Aug 22, 10:52 AM CDT	Areal Flood Advisory	SGF	Benton, Morgan	6 hr
Aug 22, 10:59 AM CDT	Areal Flood Advisory	SGF	St. Clair	6 hr
Aug 22, 3:37 PM CDT	River Flood Warning	SGF	Vernon	4 days

Nearby

Flash Flood Warnings in Missouri, 2017 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.