Alert archive / Missouri / Flash Flood Warnings in 2001

Flash Flood Warning 17, NWS St. Louis, MO

September 8, 2001Crawford County, Missouri

NWS St. Louis, MO issued this flash flood warning at Sep 8, 2001, 9:24 PM CDT for Crawford County, Missouri. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 8, 2001, 9:24 PM CDT (02:24 UTC)
Expired
Sep 9, 2001, 12:30 AM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Crawford County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 02:23 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

Springfield, MO (KSGF), launched 00:00Z, 2.4 hours before the alert went out and 251 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, Springfield, MO at 00:00Z on 2001-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 471 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, Springfield, MO at 00:00Z on 2001-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
471 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
550 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 090228
FFWSTL
MOC055-090530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
924 PM CDT SAT SEP 8 2001

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 1230 AM CDT

* AT 924 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED 2 TO 4 
INCHES IF RAIN HAD FALLEN AROUND STEELVILLE AND SOUTWEST OF 
STEELVILLE.   

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE   
AFFECTING THE ENTIRE COUNTY AS MORE STORMS ARE MOVING FROM THE 
SOUTHWEST.   

IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER
GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD.

THOSE CAMPING NEAR SMALL STREAMS SHOULD MOVE TO HIGHER GROUND AT
ONCE. WATER LEVELS MAY RISE RAPIDLY WITH LITTLE OR NO WARNING...EVEN
IF THE HEAVY RAINS ARE WELL UPSTREAM OF YOUR CAMPSITE.

AV/ST

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 7:24 PM CDTSevere Thunderstorm WarningLSXIron51 min
Sep 8, 8:59 PM CDTSevere Thunderstorm WarningLSXCrawford46 min
Sep 8, 9:15 PM CDTSevere Thunderstorm WarningLSXJefferson30 min
Sep 8, 9:43 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis47 min
Sep 8, 10:19 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis41 min
Sep 9, 12:15 AM CDTFlash Flood WarningLSXCrawford4 hr

Nearby

Flash Flood Warnings in Missouri, 2001Every flash flood warning in 2001

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.