Alert archive / Missouri / Flash Flood Watches in 2009

Flash Flood Watch 4, NWS Kansas City, MO

March 23, 200937 counties in Missouri; 7 counties in Kansas

NWS Kansas City, MO issued this flash flood watch at Mar 23, 2009, 4:01 PM CDT for 37 counties in Missouri; 7 counties in Kansas. It took effect at Mar 23, 2009, 10:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Mar 23, 2009, 4:01 PM CDT (21:01 UTC)
In effect from
Mar 23, 2009, 10:00 PM CDT
Expired
Mar 24, 2009, 1:00 PM CDT
In force
15 hr
Issued by
NWS Kansas City, MO
Flood severity
None
All 44 counties

Atchison County, KS, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Pettis County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 84 km from the middle of the area, began a volume at 21:04 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

Topeka, KS (KTOP), launched 12:00Z, 9.0 hours before the alert went out and 154 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2009-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2009-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 332 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
-529 J/kg
Mixed-layer LCL
1190 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
332 m²/s²
0-3 km storm-relative helicity
505 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 23, 12:30 PM CDT, 3 hours 31 minutes earlier.

Area forecast discussion, Mar 23, 12:30 PM CDT, 3 hours 31 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Mar 23, 1:11 PM CDT, 2 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
111 PM CDT MON MAR 23 2009

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-241815-
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-
111 PM CDT MON MAR 23 2009

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

GUSTY SOUTH WINDS WILL REMAIN SUSTAINED IN THE 25 TO 35 MPH RANGE
THROUGH THE AFTERNOON HOURS WITH GUSTS INTO THE 40 TO 45 MPH RANGE AT
TIMES AND A WIND ADVISORY REMAINS IN EFFECT THROUGH 7 PM.

A COLD FRONT WILL BE APPROACHING FROM THE WEST THIS EVENING.
SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS EVENING FROM SOUTHEAST
AND EAST CENTRAL KANSAS INTO NORTHWEST MISSOURI...WELL AHEAD OF THE
MAIN LINE OF STORMS ASSOCIATED WITH THE COLD FRONT. THE INSTABILITY
WILL NOT BE AS GREAT WITH THE SCATTERED STORMS AHEAD OF THE
FRONT...BUT THERE IS ENOUGH SHEAR TO BE OF CONCERN TO ORGANIZE THESE
STORMS INTO SUPERCELL TYPE DEVELOPMENT THAT COULD SUSTAIN A LARGE
HAIL AND DAMAGING WIND THREAT.

THEN BY LATE EVENING THE DRY LINE AND COLD FRONT WILL BE SURGING
NORTHEAST TOWARD NORTHEAST KANSAS AND NORTHWEST MISSOURI. THIS IS
EXPECTED TO BRING THE STRONG TO SEVERE STORMS ASSOCIATED WITH THE
FRONT INTO THIS REGION...WITH THE MORE LIKELY TIMEFRAME BEING AFTER
9 PM. THESE STORMS WILL HAVE THE POTENTIAL OF PRODUCING DAMAGING
WINDS...LARGE HAIL AND ISOLATED TORNADOES.  THEN AFTER MIDNIGHT AND
DURING THE EARLY MORNING HOURS THE LINE OF STORMS ASSOCIATED WITH THE
COLD FRONT SHOULD SWING EAST INTO EAST CENTRAL KANSAS AND WEST
CENTRAL MISSOURI. AT THIS POINT...THE MAIN THREAT IS EXPECTED TO BE
WINDS...HAIL AND VERY HEAVY RAINFALL. THE STORMS IN NORTHWEST
MISSOURI WILL BE MOVING EAST INTO NORTH CENTRAL MISSOURI DURING THIS
TIME FRAME WITH ALSO WINDS...HAIL AND HEAVY RAINFALL THE MAIN
THREATS.

THE EASTWARD PROGRESSION OF THE FRONT WILL BE SLOWED OVERNIGHT...SO
REPEATED ROUNDS OF THUNDERSTORMS WITH HEAVY RAINFALL WILL BE POSSIBLE
ACROSS AREAS FROM EASTERN KANSAS INTO NORTHWEST AND NORTH CENTRAL
MISSOURI. CENTRAL MISSOURI...INCLUDING THE SEDALIA AND BOONVILLE
AREAS...MAY NOT SEE THE HEAVIER RAIN UNTIL TOWARD DAYBREAK. WITH THE
THREAT OF HEAVY RAINFALL...FLOODING ISSUES WILL BE A BIG CONCERN.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ON TUESDAY...THE FRONT WILL LIKELY NOT MOVE EAST OF THE OUTLOOK AREA
UNTIL EARLY AFTERNOON. UNTIL THAT TIME...THERE WILL BE THE POTENTIAL
OF STRONG STORMS PRODUCING MORE HEAVY RAINFALL...MAINLY IN AREAS FROM EAST
OF INTERSTATE 35...INTO NORTHEAST AND CENTRAL MISSOURI. SEVERE STORMS
WILL BE LESS LIKELY...ALTHOUGH HAIL AND STRONG WINDS CAN NOT BE
TOTALLY RULED OUT.

ANOTHER STORM SYSTEM WILL BE MOVING INTO THE REGION FRIDAY AND FRIDAY
NIGHT. THE MOST LIKELY TIME FRAME FOR THUNDERSTORMS WILL BE FRIDAY
NIGHT...MAINLY IN AREAS TO THE SOUTH AND EAST OF KANSAS CITY...INTO
CENTRAL MISSOURI. IT IS TOO EARLY TO TELL IF SEVERE WEATHER WILL
OCCUR WITH THIS SYSTEM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED...LATER THIS EVENING AND
INTO THE EARLY MORNING HOURS ALONG AND WEST OF A LINE FROM BETHANY TO
CLINTON. REPORTS OF FLOODING ARE REQUESTED TONIGHT AND ON TUESDAY.

PC

Nearby

Flash Flood Watches in Missouri, 2009Flash Flood Watches in Kansas, 2009Every flash flood watch in 2009

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.