Alert archive / Missouri / Areal Flood Warnings in 2012

Areal Flood Warning 1, NWS Kansas City, MO

April 30, 20124 counties in Missouri

NWS Kansas City, MO issued this areal flood warning at Apr 30, 2012, 5:35 AM CDT for 4 counties in Missouri. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 30, 2012, 5:35 AM CDT (10:35 UTC)
Expired: Apr 30, 2012, 3:30 PM CDT
In force: 10 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Cooper County, MO, Howard County, MO, Pettis County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 111 km from the middle of the area, began a volume at 10:38 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, 10.6 hours before the alert went out and 240 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: 913 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 985 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this areal flood warning went out at Apr 30, 3:58 AM CDT, 1 hour 37 minutes earlier.

Area forecast discussion, Apr 30, 3:58 AM CDT, 1 hour 37 minutes before

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Hazardous weather outlook, Apr 30, 4:56 AM CDT, 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
456 AM CDT MON APR 30 2012

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-011000-
ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-JOHNSON KS-
ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-SCHUYLER-
HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-BUCHANAN-CLINTON-
CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY-RAY-CARROLL-CHARITON-
RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-JOHNSON MO-PETTIS-
COOPER-BATES-HENRY-
456 AM CDT MON APR 30 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND
WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE LATE TONIGHT ACROSS AREAS MAINLY SOUTH OF
I-70. SOME OF THESE STORMS MAY PRODUCE HEAVY RAINFALL WHICH COULD
LEAD TO ADDITIONAL FLOODING PROBLEMS ACROSS CENTRAL AND WEST CENTRAL
MISSOURI. SEVERE THUNDERSTORMS ARE NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A NORTHWARD SHIFT IN THE STORM TRACK WILL BRING THE HIGHEST CHANCES
FOR THUNDERSTORMS INTO NEBRASKA AND IOWA TUESDAY THROUGH FRIDAY. SOME
OF THESE THUNDERSTORMS MAY REACH AS FAR SOUTH AS NORTHERN
MISSOURI...ESPECIALLY WEDNESDAY NIGHT AND AGAIN THURSDAY NIGHT. IT IS
TOO EARLY TO DETERMINE IF ANY OF THESE STORMS MAY BECOME SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

HAWBLITZEL

In the hours before

Local storm report, Apr 30, 12:52 AM CDT, 4 hours 43 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 10:13 PM CDT	Areal Flood Advisory	EAX	Carroll, Chariton, Linn, Macon, Randolph	6 hr
Apr 29, 10:41 PM CDT	Areal Flood Advisory	EAX	Cooper, Howard, Pettis, Saline	3 hr
Apr 29, 10:50 PM CDT	Special Weather Statement	EAX	Pettis	25 min
Apr 29, 11:36 PM CDT	Flash Flood Warning	EAX	Cooper, Howard, Pettis, Saline	6 hr
Apr 29, 11:53 PM CDT	River Flood Warning	EAX	Howard	19 hr
Apr 30, 12:08 AM CDT	Areal Flood Advisory	EAX	Bates, Henry, Johnson	6 hr
Apr 30, 1:00 AM CDT	River Flood Warning	EAX	Cooper	52 hr
Apr 30, 7:05 AM CDT	River Flood Warning	EAX	Johnson, Pettis	8 hr
Apr 30, 7:23 AM CDT	River Flood Warning	EAX	Cooper	22 hr

Nearby

Areal Flood Warnings in Missouri, 2012 Every areal flood warning in 2012

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.