Alert archive / Missouri / Flash Flood Warnings in 2012
Flash Flood Warning 17, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 30, 2012, 12:02 AM CDT for Boone County, Missouri. It was in force for 7 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
- Apr 30, 2012, 12:02 AM CDT (05:02 UTC)
- Expired
- Apr 30, 2012, 7:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Boone County, MO
The radar
The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 05:03 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 |
|---|---|---|---|
| Apr 30, 12:40 AM CDT | FLASH FLOOD | Ashland, MO | 6 INCHES OF WATER REPORTED ON U.S. HIGHWAY 63 NEAR ASHLAND |
| Apr 30, 1:28 AM CDT | FLASH FLOOD | 6 N Ashland, MO | U.S. HIGHWAY 63 NORTHBOUND NEAR HIGHWAY 163 IS CLOSED BECAUSE OF FLOODING. ALSO CLOSED IS BEARFIELD ROAD NEAR GANS ROAD AND RANGELINE ROAD NEAR HIGHWAY AB. |
| Apr 30, 4:58 AM CDT | FLASH FLOOD | Columbia, MO | HILLCREEK ROAD SOUTH NEAR BUFFALO RIDGE ROAD CLOSED DUE TO FLOODING. |
| Apr 30, 5:58 AM CDT | FLASH FLOOD | 4 Ese Ashland, MO | ROUTE Y CLOSED NEAR THE BOONE...CALLAWAY COUNTY LINE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 5.0 hours before the alert went out and 250 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
087
WGUS53 KLSX 300502
FFWLSX
MOC019-301200-
/O.NEW.KLSX.FF.W.0017.120430T0502Z-120430T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1202 AM CDT MON APR 30 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN BOONE COUNTY IN CENTRAL MISSOURI...
* UNTIL 700 AM CDT
* AT 1202 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RAINFALL RATES OF 1 TO 3 INCHES PER HOUR CAN BE
EXPECTED WITH THESE THUNDERSTORMS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ASHLAND...COLUMBIA...MIDWAY AND ROCHEPORT.
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.
&&
LAT...LON 3901 9256 3901 9214 3890 9217 3881 9214
3880 9216 3874 9218 3871 9222 3865 9222
3868 9236 3872 9234 3874 9240 3876 9241
3881 9238 3883 9244 3888 9248 3890 9248
3897 9257
$$
CVKING2 follow-up statements
577
WGUS73 KLSX 300539
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1239 AM CDT MON APR 30 2012
MOC019-301200-
/O.CON.KLSX.FF.W.0017.000000T0000Z-120430T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE MO-
1239 AM CDT MON APR 30 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN BOONE COUNTY
UNTIL 700 AM CDT...
AT 1235 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
AREA. SEVERAL ROUNDS OF HEAVY RAINFALL HAVE LED TO SOME LOCATIONS
ACROSS SOUTHERN BOONE COUNTY RECEIVING RAINFALL AMOUNTS OF 4 TO 6
INCHES THE PAST TWO DAYS.
RUNOFF FROM THIS EXCESSIVE RAINFALL IS CAUSING FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ASHLAND...COLUMBIA...MIDWAY AND ROCHEPORT.
FLASH FLOODING IS OCCURRING! SIX INCHES OF FAST MOVING WATER IS NOW
FLOWING ACROSS HIGHWAY 63 NORTH OF ASHLAND. OTHER SMALL STREAMS AND
CREEKS ARE FLOODING LOW LYING AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3901 9256 3901 9214 3890 9217 3881 9214
3880 9216 3874 9218 3871 9222 3865 9222
3868 9236 3872 9234 3874 9240 3876 9241
3881 9238 3883 9244 3888 9248 3890 9248
3897 9257
$$
CVKING005
WGUS73 KLSX 300640
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
140 AM CDT MON APR 30 2012
MOC019-301200-
/O.CON.KLSX.FF.W.0017.000000T0000Z-120430T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE MO-
140 AM CDT MON APR 30 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN BOONE COUNTY
UNTIL 700 AM CDT...
AT 136 AM CDT...FLASH FLOODING WAS OCCURRING ACROSS SOUTHERN BOONE
COUNTY. THUNDERSTORMS WITH VERY HEAVY RAINFALL WILL CONTINUE TO
DEVELOP AND MOVE OVER THE AREA THROUGH SUNRISE. RADAR INDICATES THAT
UPWARDS OF 6 INCHES OF RAIN HAS FALLEN ACROSS THE WARNED AREA OVER
THE PAST TWO DAYS.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY. THIS
EXCESSIVE RAINFALL WILL CONTINUE TO LEAD TO FLASH FLOODING. SOME
LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE ASHLAND AND COLUMBIA.
THE FOLLOWING HIGHWAYS AND ROADS HAVE BEEN CLOSED DUE TO FLASH
FLOODING...
U.S. HIGHWAY 63 NORTHBOUND NEAR HIGHWAY 163 IS CLOSED.
BEARFIELD ROAD NEAR GANS ROAD IS CLOSED.
RANGELINE ROAD NEAR HIGHWAY AB IS CLOSED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH 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.
&&
LAT...LON 3901 9256 3901 9214 3890 9217 3881 9214
3880 9216 3874 9218 3871 9222 3865 9222
3868 9236 3872 9234 3874 9240 3876 9241
3881 9238 3883 9244 3888 9248 3890 9248
3897 9257
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:11 PM CDT | River Flood Warning | LSX | Cole | 45 hr |
| Apr 29, 10:10 PM CDT | River Flood Warning | LSX | Lincoln | 11 hr |
| Apr 29, 10:13 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 47 min |
| Apr 29, 10:43 PM CDT | Flash Flood Warning | LSX | Audrain, Boone | 8 hr |
| Apr 29, 10:45 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Monroe, Ralls | 45 min |
| Apr 30, 2:40 AM CDT | Flash Flood Warning | LSX | Callaway | 6 hr |
| Apr 30, 6:29 AM CDT | Flash Flood Warning | LSX | Audrain, Boone | 5 hr |
| Apr 30, 8:31 AM CDT | Areal Flood Warning | LSX | Callaway | 6 hr |
| Apr 30, 10:48 AM CDT | Areal Flood Warning | LSX | Boone | 6 hr |
| Apr 30, 4:51 PM CDT | Areal Flood Warning | LSX | Boone | 6 hr |
| Apr 30, 5:27 PM CDT | River Flood Warning | LSX | Lincoln | 17 hr |
Nearby
Flash Flood Warnings in Missouri, 2012Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.