Alert archive / Missouri / Areal Flood Advisories in 2012

Areal Flood Advisory 5, NWS St. Louis, MO

March 23, 2012Lewis County, Missouri

NWS St. Louis, MO issued this areal flood advisory at Mar 23, 2012, 5:01 PM CDT for Lewis County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 23, 2012, 5:01 PM CDT (22:01 UTC)
Expired
Mar 23, 2012, 9:00 PM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon

County Lewis County, MO

The radar

The St Louis radar (KLSX), 179 km from the middle of the area, began a volume at 22:01 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

Davenport, (KDVN), launched 12:00Z, 10.0 hours before the alert went out and 198 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, Davenport, at 12:00Z on 2012-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Davenport, at 12:00Z on 2012-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -46 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
997 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-46 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 23, 4:42 AM CDTSevere Thunderstorm WarningLSXSaint Francois, Washington33 min
Mar 23, 4:14 PM CDTSevere Thunderstorm WarningLSXLewis31 min
Mar 23, 4:30 PM CDTSevere Thunderstorm WarningLSXPike, Ralls30 min
Mar 23, 12:59 PM CDTTornado WarningLSXWashington46 min
Mar 23, 1:47 PM CDTTornado WarningLSXMarion43 min
Mar 23, 2:15 PM CDTTornado WarningLSXMarion30 min
Mar 23, 4:26 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene14 min

Nearby

Areal Flood Advisories in Missouri, 2012Every areal flood advisory 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.