Alert archive / Missouri / Flash Flood Warnings in 2015

Flash Flood Warning 92, NWS St. Louis, MO

December 28, 2015Saint Charles County, Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this flash flood warning at Dec 28, 2015, 4:28 AM CST for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 8 hr. 13 reports 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
Dec 28, 2015, 4:28 AM CST (10:28 UTC)
Expired
Dec 28, 2015, 12:15 PM CST
In force
8 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 13 km from the middle of the area, began a volume at 10:29 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

TimeReportWhereRemark
Dec 28, 5:53 AM CSTHEAVY RAIN 9.12 Sse St. Peters, MOSTORM TOTAL SO FAR.
Dec 28, 6:09 AM CSTHEAVY RAIN 9.38Weldon Spring, MOWFO ST. LOUIS HAS MEASURED 9.38 INCHES FOR THE EVENT SO FAR.
Dec 28, 6:29 AM CSTHEAVY RAIN 9.66Cottleville, MOSTORM TOTAL SO FAR.
Dec 28, 6:37 AM CSTHEAVY RAIN 8.14Chesterfield, MORETIRED NWS EMPLOYEE
Dec 28, 7:00 AM CSTHEAVY RAIN 9.58Harvester, MOEVENT TOTAL...SO FAR
Dec 28, 7:35 AM CSTHEAVY RAIN 9.88St. Ann, MOSTORM TOTAL SO FAR.
Dec 28, 8:00 AM CSTHEAVY RAIN 6.4Eureka, MOSTORM TOTAL SO FAR
Dec 28, 8:30 AM CSTHEAVY RAIN 6.542 Nnw Valley Park, MOSTORM TOTAL SO FAR
Dec 28, 8:57 AM CSTHEAVY RAIN 8.36Peerless Park, MO
Dec 28, 9:15 AM CSTHEAVY RAIN 9.111 Se St. Peters, MOSTORM TOTAL SO FAR
Dec 28, 9:45 AM CSTHEAVY RAIN 9.376 Wsw O'Fallon, MOSTORM TOTAL SO FAR
Dec 28, 9:49 AM CSTHEAVY RAIN 8.1St. Louis, MO
Dec 28, 10:15 AM CSTHEAVY RAIN 8.252 Nw O'Fallon, MOSTORM TOTAL SO FAR

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.5 hours before the alert went out and 235 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, Lincoln, IL at 00:00Z on 2015-12-28Temperature 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, Lincoln, IL at 00:00Z on 2015-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
773 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

520 
WGUS53 KLSX 281028
FFWLSX
MOC183-189-510-281815-
/O.NEW.KLSX.FF.W.0092.151228T1028Z-151228T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
428 AM CST MON DEC 28 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  ST. LOUIS CITY IN EAST CENTRAL MISSOURI...

* UNTIL 1215 PM CST MONDAY

* AT 420 AM CST...DOPPER RADAR INDICATED PERIODS OF MODERATE TO
  HEAVY RAIN WILL FALL ACROSS THE WARNED AREA THIS MORNING. 5 TO
  LOCALLY 10 INCHES OF RAIN HAS ALREADY FALLEN ACROSS THE ST. LOUIS
  AREA IN THE PAST 48 HOURS AND AN ADDITIONAL 1 TO 3 INCHES OF
  RAINFALL IS EXPECTED THROUGH THIS MORNING. RIVERS...CREEKS AND
  STREAMS REMAIN HIGH AND IN MOST CASES ARE FLOODING LOW LYING
  AREAS. THIS ADDITIONAL RAINFALL WILL LEAD TO FLASH FLOODING ACROSS
  THE ST. LOUIS METROPOLITAN AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN YOU ENCOUNTER FLOODED ROADS...TURN AROUND DON'T DROWN! MOST
FLOOD DEATHS OCCUR IN VEHICLES. DO NOT BECOME THE NEXT FLASH FLOOD
VICTIM!

&&

LAT...LON 3872 9021 3861 9018 3852 9027 3839 9034
      3845 9034 3850 9041 3850 9059 3849 9066
      3845 9067 3847 9071 3864 9073 3853 9093
      3854 9095 3889 9095 3887 9082 3893 9067
      3889 9062 3887 9056 3897 9045 3885 9011

$$

CVKING

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 28, 2:08 AM CSTFlash Flood WarningLSXReynolds3 hr
Dec 28, 5:21 AM CSTFlash Flood WarningLSXCallaway, Cole, Crawford, Franklin, Gasconade, Lincoln and 3 more7 hr
Dec 28, 5:24 AM CSTFlash Flood WarningLSXIron, Jefferson, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more7 hr
Dec 28, 7:57 AM CSTFlash Flood WarningLSXAudrain, Lincoln, Montgomery, Pike6 hr
Dec 28, 12:23 PM CSTAreal Flood WarningLSXCrawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more24 hr
Dec 28, 12:37 PM CSTAreal Flood WarningLSXCole, Franklin, Gasconade, Jefferson, Lincoln, Montgomery and 5 more24 hr

Nearby

Flash Flood Warnings in Missouri, 2015Every flash flood warning in 2015

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.