Alert archive / Missouri / Flash Flood Warnings in 2016

Flash Flood Warning 18, NWS Kansas City, MO

May 30, 2016Atchison County, Nodaway County, Missouri

NWS Kansas City, MO issued this flash flood warning at May 30, 2016, 8:16 PM CDT for Atchison County, Nodaway County, Missouri. It was in force for 3 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: May 30, 2016, 8:16 PM CDT (01:16 UTC)
Expired: May 30, 2016, 11:15 PM CDT
In force: 3 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Atchison County, MO, Nodaway County, MO

The radar

The Omaha radar (KOAX), 132 km from the middle of the area, began a volume at 01:19 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
May 30, 9:30 PM CDT	FLASH FLOOD	5 N Tarkio, MO	WATER AND MUD FLOWING OVER HWY 59 SOUTH OF 140TH STREET. TIME AND LOCATION ESTIMATED.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 132 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: 609 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1720 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

077 
WGUS53 KEAX 310116
FFWEAX
MOC005-147-310415-
/O.NEW.KEAX.FF.W.0018.160531T0116Z-160531T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
816 PM CDT MON MAY 30 2016

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN ATCHISON COUNTY IN NORTHWESTERN MISSOURI...
  NORTHWESTERN NODAWAY COUNTY IN NORTHWESTERN MISSOURI...

* UNTIL 1115 PM CDT

* AT 816 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TARKIO...ELMO...WESTBORO AND BLANCHARD. 

LAT...LON 4058 9512 4057 9508 4049 9511 4047 9518
      4038 9518 4038 9549 4058 9550

$$

MURRAY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 9:25 PM CDT	Special Weather Statement	EAX	Atchison	35 min
May 30, 9:40 PM CDT	River Flood Warning	EAX	Atchison, Holt	37 hr
May 30, 10:00 PM CDT	Flash Flood Warning	EAX	Atchison	3 hr
May 31, 1:09 AM CDT	Areal Flood Warning	EAX	Atchison	12 hr

Nearby

Flash Flood Warnings in Missouri, 2016 Every flash flood warning in 2016

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.