Alert archive / Missouri / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Springfield, MO

April 28, 2020Laclede County, Pulaski County, Missouri

NWS Springfield, MO issued this flash flood warning at Apr 28, 2020, 7:51 PM CDT for Laclede County, Pulaski County, Missouri. It was in force for 6 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: Apr 28, 2020, 7:51 PM CDT (00:51 UTC)
Expired: Apr 29, 2020, 1:45 AM CDT
In force: 6 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

Counties Laclede County, MO, Pulaski County, MO

The radar

The Springfield radar (KSGF), 108 km from the middle of the area, began a volume at 00:51 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
Apr 28, 7:52 PM CDT	FLASH FLOOD	Richland, MO	RICHLAND PD REPORTS 8 INCHES OF RUNNING WATER OVER JEFFERSON.

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, 0.9 hours before the alert went out and 158 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: 1990 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

586 
WGUS53 KSGF 290051
FFWSGF
MOC105-169-290645-
/O.NEW.KSGF.FF.W.0021.200429T0051Z-200429T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
751 PM CDT Tue Apr 28 2020

The National Weather Service in Springfield has issued a

* Flash Flood Warning for...
  Central Laclede County in southwestern Missouri...
  Pulaski County in central Missouri...

* Until 145 AM CDT.

* At 750 PM 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.

* Some locations that will experience flooding include...
  Fort Leonard Wood...              Lebanon...
  Waynesville...                    St. Robert...
  Richland...                       Dixon...
  Crocker...                        Stoutland...
  Twin Bridges...                   Devil's Elbow...
  Sleeper...                        Falcon...
  Laquey...                         Swedeborg...
  Ozark Springs...                  Dry Knob...

This warning includes but is not limited to the following low water
crossings...
Route O at Jones Creek just south of Dixon...
Route BB at Dry Auglaize Creek 4 miles north of Sleeper...
Route T northwest of Waynesville...
Route U at Tavern Creek west of Crocker...
and Route B at The Osage Fork southeast of Lebanon.

Additional rainfall amounts of one to two 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.

&&

LAT...LON 3768 9204 3752 9258 3786 9276 3789 9263
      3784 9260 3780 9256 3783 9250 3782 9246
      3786 9241 3794 9241 3801 9206

FLASH FLOOD...RADAR INDICATED

$$

DSA

1 follow-up statement

421 
WGUS73 KSGF 290638
FFSSGF

Flash Flood Statement
National Weather Service Springfield MO
138 AM CDT Wed Apr 29 2020

MOC105-169-290647-
/O.EXP.KSGF.FF.W.0021.000000T0000Z-200429T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Laclede MO-Pulaski MO-
138 AM CDT Wed Apr 29 2020

...THE FLASH FLOOD WARNING FOR CENTRAL LACLEDE AND PULASKI COUNTIES
WILL EXPIRE AT 145 AM CDT...

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 3768 9204 3752 9258 3786 9276 3789 9263
      3784 9260 3780 9256 3783 9250 3782 9246
      3786 9241 3794 9241 3801 9206

$$

Hatch

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 7:21 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Dallas, Douglas, Ozark, Taney, Webster and 1 more	54 min
Apr 28, 7:23 PM CDT	Tornado Warning	SGF	Christian	22 min
Apr 28, 7:37 PM CDT	Tornado Warning	SGF	Webster	23 min
Apr 28, 7:42 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Phelps, Pulaski	28 min
Apr 28, 7:42 PM CDT	Tornado Warning	SGF	Christian, Douglas	33 min
Apr 28, 7:57 PM CDT	Tornado Warning	SGF	Wright	33 min
Apr 28, 8:05 PM CDT	Tornado Warning	SGF	Douglas	25 min
Apr 28, 8:08 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Howell, Ozark, Texas, Wright	67 min
Apr 28, 8:47 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon, Shannon	58 min

Nearby

Flash Flood Warnings in Missouri, 2020 Every flash flood warning in 2020

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.