Alert archive / Missouri / Flash Flood Warnings in 2011
Flash Flood Warning 52, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 17, 2011, 12:25 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 5 hr. 4 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
- Jun 17, 2011, 12:25 PM CDT (17:25 UTC)
- Expired
- Jun 17, 2011, 5:21 PM CDT
- In force
- 5 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The St Louis radar (KLSX), 23 km from the middle of the area, began a volume at 17:25 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 |
|---|---|---|---|
| Jun 17, 12:26 PM CDT | HEAVY RAIN 1.12 | Overland, MO | AT PAGE AVE AND INTERSTATE 170 |
| Jun 17, 12:50 PM CDT | FLASH FLOOD | 3 Nnw Town And Country, MO | A RETENTION POND BLEW OUT JUST NORTH OF LADUE ROAD ON 141...UNABLE TO ESTIMATE HOW DEEP THE WATER IS ON PARTS OF 141. |
| Jun 17, 12:53 PM CDT | FLASH FLOOD | 1 E Woodson Terrace, MO | APPROXIMATELY 6 TO 8 INCHES OF WATER ON EASTBOUND NATURAL BRIDGE ROAD UNDER INTERSTATE 70 |
| Jun 17, 1:00 PM CDT | HEAVY RAIN 1.46 | Maryland Heights, MO | MEASURED AT FOX 2 |
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 12:00Z, 5.4 hours before the alert went out and 231 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.
- Mixed-layer CAPE
- 786 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1122 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
514
WGUS53 KLSX 171725
FFWLSX
MOC189-510-172330-
/O.NEW.KLSX.FF.W.0052.110617T1725Z-110617T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1225 PM CDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. LOUIS CITY IN EAST CENTRAL MISSOURI...
* UNTIL 630 PM CDT
* AT 1225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. ONE TO TWO INCHES OF RAINFALL HAVE FALLEN IN LESS
THAN AN HOUR OVER MANY LOCATIONS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AFFTON...BALLWIN...BEL-RIDGE...BELLEFONTAINE NEIGHBORS...
BERKELEY...BLACK JACK...BRENTWOOD...BRIDGETON...CHESTERFIELD...
CLARKSON VALLEY...CLAYTON...COOL VALLEY...CRESTWOOD...CREVE
COEUR...DELLWOOD...DES PERES...ELLISVILLE...EUREKA...FENTON...
FERGUSON...FLORISSANT...FRONTENAC...GLENDALE...HAZELWOOD...
HILLSDALE...JENNINGS...KINLOCH...KIRKWOOD...LADUE AND LAKESHIRE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.
&&
LAT...LON 3873 9021 3861 9018 3839 9034 3846 9034
3845 9041 3850 9041 3850 9059 3847 9062
3849 9065 3845 9068 3848 9073 3864 9073
3869 9065 3868 9055 3881 9046 3883 9036
3889 9033 3889 9029 3882 9020 3882 9012
$$
TES1 follow-up statement
129
WGUS73 KLSX 172221
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
521 PM CDT FRI JUN 17 2011
MOC189-510-172234-
/O.CAN.KLSX.FF.W.0052.000000T0000Z-110617T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. LOUIS MO-ST. LOUIS CITY MO-
521 PM CDT FRI JUN 17 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR ST. LOUIS CITY AND
ST. LOUIS COUNTIES IS CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 3873 9021 3861 9018 3839 9034 3846 9034
3845 9041 3850 9041 3850 9059 3847 9062
3849 9065 3845 9068 3848 9073 3864 9073
3869 9065 3868 9055 3881 9046 3883 9036
3889 9033 3889 9029 3882 9020 3882 9012
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 9:23 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery, Warren | 37 min |
| Jun 17, 9:35 AM CDT | Severe Thunderstorm Warning | LSX | Osage | 39 min |
| Jun 17, 10:48 AM CDT | Areal Flood Advisory | LSX | Audrain, Boone | 4 hr |
| Jun 17, 11:12 AM CDT | Areal Flood Advisory | LSX | Lincoln, Montgomery, Warren | 4 hr |
| Jun 17, 11:51 AM CDT | Areal Flood Advisory | LSX | Saint Charles, Saint Louis, City of Saint Louis | 3 hr |
| Jun 17, 12:15 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 45 min |
| Jun 17, 12:33 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 27 min |
| Jun 17, 12:50 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 40 min |
| Jun 17, 4:44 PM CDT | River Flood Warning | LSX | Saint Charles | 3 hr |
Nearby
Flash Flood Warnings in Missouri, 2011Every flash flood warning in 2011
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.