Alert archive / Illinois / Flash Flood Warnings in 1994

Flash Flood Warning 26, NWS St. Louis, MO

April 28, 1994Jefferson County, Missouri; Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this flash flood warning at Apr 28, 1994, 6:35 AM CDT for Jefferson County, Missouri; Monroe County, Saint Clair County, Illinois. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 28, 1994, 6:35 AM CDT (11:35 UTC)
Expired
Apr 28, 1994, 10:30 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Monroe County, IL, Saint Clair County, IL, Jefferson County, MO

The radar

The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 11:37 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 (KUMN), launched 00:00Z, 11.6 hours before the alert went out and 354 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 1994-04-28Temperature 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, Springfield, MO at 00:00Z on 1994-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 493 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
852 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
493 m²/s²
0-3 km storm-relative helicity
792 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 281138
FFWSTL
ILC133-163-MOC099-281530-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
635 AM CDT THU APR 28 1994
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ILLINOIS
 
   ...MONROE COUNTY...ST CLAIR COUNTY
 
 
IN EAST CENTRAL MISSOURI
 
   ...JEFFERSON COUNTY
 
AT 630 AM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A BAND OF
HEAVY THUNDERSTORMS TRAILED FROM 20 MILES SOUTHWEST OF ST LOUIS..NEAR
PACAFIC...SOUTHWEST TO AROUND STEELVILLE MISSOURI...80 MILES SOUTHWEST
OF ST LOUIS.  THESE STORMS WERE MOVING TO THE NORTHEAST AT 40 MPH AND
WILL MOVE ACROSS THE MISSISSIPPI RIVER INTO ILLINOIS BETWEEN 730 AND 830
AM THIS MORNING.
 
DOPPLER PRECIPITATION ESTIMATES INDICATE ONE TO TWO INCHES OF RAIN
HAS ALREADY FALLEN IN NORTHERN PORTIONS OF THESE COUNTIES.  RAINS WILL
BE VERY HEAVY AT TIMES THIS MORNING. FLOODING OF SMALLER STREAMS AND
TRIBUTARIES WILL BE IMMINENT ALONG WITH PONDING AND LOCAL FLOODING OF
ROADWAYS...ESPECIALLY SECONDARY ROADS WITH POORER DRAINAGE.
 
RAINFALL WILL LIKELY CONTINUE THROUGH THE MORNING...HEAVY AT TIMES.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
PEDIGO

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 28, 12:49 AM CDT, 5 hours 46 minutes before
MOZ024-025-032-033-039>042-045>051-055>059-068>070-280645

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
1245 AM CDT THU APR 28 1994

...STRONG THUNDERSTORMS WERE MOVING THROUGH THE SOUTH HALF OF CENTRAL
MISSOURI...

AT 1240 AM STRONG THUNDERSTORMS WERE SCATTERED FROM THE NORTH END
OF THE LAKE OF THE OZARKS TO JEFFERSON CITY AND THEN EAST TO
HERMANN IN GASCONADE COUNTY AND BELLE IN MARIES COUNTY.  THE STRONGEST
STORMS WERE LOCATED 35 MILES EAST AND 25 MILES SOUTHEAST OF JEFFERSON
CITY.  THESE STRONGEST STORMS MAY PRODUCE SMALL HAIL AND STRONG GUSTY
WINDS.  ALL OF THE THUNDERSTORMS WILL PRODUCE BRIEF HEAVY RAIN WHICH
MAY CAUSE FLOODING OF LOW LYING AREAS IN TOWNS AND ON COUNTY ROADS.
THE THUNDERSTORMS WERE MOVING EAST AT 30 MPH.

IF YOU LIVE IN FLOOD PRONE AREAS BE ALERT TO POSSIBLE FLOODING.  IF
YOU ARE DRIVING...SLOW DOWN WHEN CROSSING LOW BRIDGES OR LOW SPOTS
IN TOWNS.                          KENNEDY
Special weather statement, Apr 28, 1:00 AM CDT, 5 hours 35 minutes before
MOZ060>065-ILZ100>102-280800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1258 AM CDT THU APR 28 1994

...THUNDERSTORMS CONTINUE TO FORM OVER THE BI-STATE AREA...

AT 1255 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED ANOTHER
ROUND OF SHOWERS AND THUNDERSTORMS ACROSS EAST CENTRAL MISSOURI. THE
STORMS EXTEND FROM 20 MILES WEST OF ST. CHARLES TO 15 MILES WEST OF
WASHINGTON.

STORMS WERE MOVING TO THE EAST TO NORTHEAST AT 35 TO 40 MPH.  THESE
STORMS WILL BRING SMALL HAIL AND ISOLATED AREAS OF HEAVY RAIN ACROSS
THE MISSOURI COUNTIES OF WARREN...FRANKLIN...JEFFERSON...ST.
CHARLES...ST. LOUIS AND ST. LOUIS CITY...AND THE ILLINOIS COUNTIES OF
MADISON...ST. CLAIR...AND MONROE. THIS ACTIVITY WILL OCCUR BETWEEN ONE
AND THREE THIS MORNING.

REMEMBER...LIGHTNING MAY STRIKE SOME MILES AWAY FROM THE PARENT
CLOUD.  PRECAUTIONS SHOULD BE TAKEN EVEN THOUGH THE THUNDERSTORM IS
NOT DIRECTLY OVERHEAD.

ST/DM
Special weather statement, Apr 28, 4:49 AM CDT, 1 hour 46 minutes before
MOZ045>051-055>059-068>070-281050-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MISSOURI
447 AM CDT THU APR 28 1994

...SEVERE THUNDERSTORM WATCH FOR THE SOUTHERN HALF OF CENTRAL MISSOURI
UNTIL 800 AM...

AT 435 AM VERY STRONG THUNDERSTORMS WERE SCATTERED IN A 10 MILE WIDE
AREA FROM NEAR ROLLA TO 50 MILES SOUTH OF SEDALIA NEAR HERMITAGE.
THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 30 MILES AN HOUR.
A SMALL TREEWAS BLOWN OVER BY ONE OF THESE THUNDERSTORMS NEAR ELKTON
IN SOUTHERN HICKORY COUNTY...AND LARGE HAIL WAS REPORTED WITH A
THUNDERSTORM EARLIER IN DALLAS COUNTY. THE THUNDERSTORMS HAD DECREASED
SOMEWHAT IN INTENSITY BUT WERE STILL CAPABLE OF PRODUCING GUSTY WINDS
AND HAIL.

IF YOU LIVE IN LINN CREEK...TUSCUMBIA OR VIENNA BE PREPARED FOR THESE
THUNDERSTORMS BETWEEN 440 AM AND 515 AM THIS MORNING

IF SEVERE THUNDERSTORMS THREATEN YOUR AREA GET TO A STRONG BUILDING
AWAY FROM WINDOWS. PASS ALONG AND SEVERE WEATHER INFORMATION TO THE
NEAREST LAW ENFORCEMENT AGENCY SO IT CAN BE RELAYED TO THE NATIONAL
WEATHER SERVICE.

LA GREE
Special weather statement, Apr 28, 5:03 AM CDT, 1 hour 32 minutes before
MOZ053>057-066>069-077>081-088>096-101>105-281100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
502 AM CDT THU APR 28 1994

...SEVERE THUNDERSTORM WATCH HAS EXPIRED ACROSS EXTREME PORTIONS OF
   WEST CENTRAL AND SOUTHWEST MISSOURI...
...FLASH FLOOD WATCH CONTINUES FOR CENTRAL AND SOUTHERN MISSOURI THIS
   MORNING...

SEVERE THUNDERSTORM WATCH #162 FOR THE FOLLOWING COUNTIES OF BATES...
HENRY...ST CLAIR...VERNON...BARTON...DADE...JASPER...LAWRENCE...
NEWTON...MCDONALD...AND BARRY HAS EXPIRED AND WILL NOT BE REISSUED.

HOWEVER...A LARGE AREA OF SHOWERS AND THUNDERSTORMS COVERED MUCH OF
WEST CENTRAL AND SOUTHWEST MISSOURI AT 500 AM CDT. THESE STORMS WILL
HAVE THE POTENTIAL OF PRODUCING SMALL HAIL AND LOCALLY HEAVY RAINFALL.
THUS...FLASH FLOOD WATCHES REMAIN IN EFFECT FOR MUCH OF CENTRAL AND
SOUTHERN MISSOURI THIS MORNING.

 PEOPLE IN THE FLASH FLOOD WATCH AREA SHOULD MONITOR FLOOD
CONDITIONS...AND BE PREPARED TO MOVJE TO HIGHER GROUND...SHOULD
FLOODWATERS THREATEN.

METZE
Special weather statement, Apr 28, 5:12 AM CDT, 1 hour 23 minutes before
MOZ001>115-KSZ102>105-ILZ095>102-271800-

MISSOURI SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
512 AM CDT THU APR 28 1994

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS TODAY AND THIS
EVENING FOR PARTS OF EASTERN MISSOURI.  THIS RISK IS GENERALLY EAST OF
A QUINCY...ROLLA...TO CAPE GIRARDEAU LINE...AND INCLUDES THE ENTIRE
ST LOUIS METRO AREA.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY OVER THE
REMAINDER OF MISSOURI...EZXCEPT THE EXTREME NORTHWEST CORNER.

STORM SPOTTER GROUPS AND EMERGENCY MANAGERS ARE URGED TO KEEP ADVISED
OF THE LATEST FORECAST AND WATCH INFORMATION.  SKYWARN SPOTTER ACTION
MAY BE NEEDED TODAY AND THIS EVENING.

SHEA
Special weather statement, Apr 28, 5:26 AM CDT, 1 hour 9 minutes before
MOZ047>049-055>065-068>076-079>087-090>092-095-096-098>100-103-
ILZ099>102-281200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
525 AM CDT THU APR 28 1994

...SEVERE THUNDERSTORMS WATCH #165 FOR PORTIONS OF CENTRAL AND SOUTHERN
   MISSOURI IS IN EFFECT UNTIL 800 AM CDT...

AT 515 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADARS CONTINUED TO SHOW
A LARGE AREA OF SHOWERS AND THUNDERSTORMS FROM JUST NORTH OF JOPLIN TO
THE ST. LOUIS METROPOLITAN AREA. THESE STORM WERE MOVING TO THE EAST TO
NORTHEAST AT 40 MPH. THE MAIN THREAT OF SEVERE WEATHER SEEMS TO BE
LARGE HAIL AND LOCALLY HEAVY RAIN THIS MORNING. THUS...THE SEVERE
THUNDERSTORM WATCH WILL CONTINUE. ALSO...A FLASH FLOOD WATCH CONTINUES
FOR PORTIONS OF CENTRAL AND SOUTHERN MISSOURI THIS MORNING.

DO NOT TRY TO CROSS A FLOWING STREAM ON FOOT OR WITH YOUR AUTOMOBILE...
AS THE DEPTH AND CURRENT STRENGTH MAY BE TO HARD TO JUDGE. MOST FLASH
FLOOD DEATHS OCCUR AT NIGHT WHEN IT IS HARD TO DETERMINE FLOODED CONDITIONS.
.
STAY TUNED TO LOCAL MEDIA OR NOAA WEATHER RADIO FOR THE LASTEST WARNINGS
AND STATEMENTS.

METZE

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:19 PM CDTSevere Thunderstorm WarningLSXIron, Madison56 min
Apr 28, 1:23 AM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis47 min
Apr 28, 1:58 AM CDTFlash Flood WarningLSXFranklin4 hr
Apr 28, 2:21 AM CDTFlash Flood WarningLSXSaint Charles, Saint Louis4 hr
Apr 28, 2:21 AM CDTFlash Flood WarningLSXCity of Saint Louis4 hr
Apr 28, 3:30 AM CDTFlash Flood WarningLSXFranklin5 hr
Apr 28, 5:12 AM CDTFlash Flood WarningLSXCrawford, Phelps4 hr
Apr 28, 5:55 AM CDTFlash Flood WarningLSXSaint Charles, Saint Louis, City of Saint Louis4 hr
Apr 28, 5:55 AM CDTFlash Flood WarningLSXFranklin4 hr
Apr 28, 8:39 AM CDTSevere Thunderstorm WarningLSXJefferson, Saint Francois, Washington35 min
Apr 28, 11:25 AM CDTSevere Thunderstorm WarningLSXReynolds47 min
Apr 28, 12:17 PM CDTTornado WarningLSXSainte Genevieve43 min
Apr 28, 12:17 PM CDTTornado WarningLSXSaint Francois32 min
Apr 27, 7:05 PM CDTSevere Thunderstorm WarningLSXMonroe40 min
Apr 28, 3:03 AM CDTFlash Flood WarningLSXMadison5 hr
Apr 28, 10:45 AM CDTFlash Flood WarningLSXMonroe, Saint Clair3 hr
Apr 28, 12:22 PM CDTTornado WarningLSXRandolph38 min
Apr 28, 12:40 PM CDTTornado WarningLSXWashington50 min
Apr 28, 12:40 PM CDTTornado WarningLSXSaint Clair24 min
Apr 28, 1:00 PM CDTTornado WarningLSXRandolph23 min
Apr 28, 1:00 PM CDTTornado WarningLSXPerry45 min

Nearby

Flash Flood Warnings in Illinois, 1994Flash Flood Warnings in Missouri, 1994Every flash flood warning in 1994

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.