Alert archive / Missouri / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 69, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 24, 1989, 10:09 AM CDT for Macon County, Missouri. It was in force for 51 min.
The area
The counties it named.
The facts
- Issued
- May 24, 1989, 10:09 AM CDT (15:09 UTC)
- Expired
- May 24, 1989, 11:00 AM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Macon County, MO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Peoria Regional, IL (KPIA), launched 12:00Z, 3.2 hours before the alert went out and 268 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
- 691 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCOU 241510
SVRCOU
MOC121-241600-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA MO
1009 AM CDT WED MAY 24 1989
THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTH CENTRAL MISSOURI
...MACON
AT 1005 AM CDT A SEVERE THUNDERSTORM WAS 6 MILES WEST OF MACON MOVING
TO THE EAST AT 30 MILES AN HOUR. THIS STORM HAS PRODUCED ONE INCH
HAIL.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNT~IL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
METWhat forecasters said that day
The local office's own words before this severe thunderstorm 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, May 24, 4:29 AM CDT, 5 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAINT LOUIS, MO 430 AM CDT WED MAY 24 1989 ...POTENTIAL FOR SEVERE WEATHER NEXT 24 HOURS... ...MISSOURI SEVERE WEATHER OUTLOOK... THERE IS A HIGH RISK FOR SEVERE THUNDERSTORMS AND POSSIBLY TORNADOES ACROSS THE NORTHERN THIRD OF MISSOURI TODAY AND TONIGHT. THERE IS A SLIGHT CHANCE FOR SEVERE THUNDERSTORMS ACROSS THE REMAINDER OF THE STATE AS WELL. VERY WARM..MOIST AND UNSTABLE AIR WAS PUSHING INTO MISSSOURI EARLY THIS MORNING ON STRONG SOUTHERLY WINDS. TEMPERATURES TODAY WILL REACH WELL INTO THE 80S WHILE DEW POINTS APPROACH 70 DEGREES. THIS WILL SET THE STAGE FOR SEVERE THUNDERSTORMS. A COLD FRONT WILL PUSH OUT OF THE PLAINS AND REACH THE MISSOURI BORDER THIS EVENING. ALONG THIS CONTRASTING LINE BETWEEN HOT MOIST AIR AND COOLER DRIER AIR...SEVERE THUNDERSTORMS ARE FORECAST TO DEVELOP. AS OF 430AM...SEVERE THUNDERSTORMS WERE ALREADY INDICATED IN THE FAR NORTHEAST TIP OF MISSOURI. ALTHOUGH THESE STORMS ARE SEPERATE FROM THE SEVERE STORMS EXPECTED LATER TODAY..THEY ARE AN INDICATION OF THE INSTABILITY IN THE ATMOSPHERE. A LINE OF SEVERE THUNDERSTORMS IS FORECAST TO DEVELOP LATER TODAY IN THE PLAINS AND REACH NORTHWEST MISSOURI THIS EVENING. THE VERY STRONG WINDS AT THE EARTHS SURFACE AS WELL AS A FAVORABLE POSITION OF THE JET STREAM INDICATE A LIKELYHOOD FOR TORNADOES WITH A FEW OF THESE STORMS. ONCE THE MAIN SQUALL LINE FORMS IT SHOULD CONTINUE TO MOVE RAPLDLY EASTWARD THROUGH THE NIGHT AND EFFECT EASTERN SECTIONS OF THE STATE WELL INTO THE NIGHT. KEEP INFORMED ON THIS DEVELOPING WEATHER SITUATION BY LISTENING FOR ADDITIONAL STATEMENTS OR WARNINGS FROM THE NATIONAL WEATHER SERVICE THROUGHOUT THE DAY. FELDT
Special weather statement, May 24, 4:54 AM CDT, 5 hours 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAINT LOUIS, MO 450 AM CDT WED MAY 24 1989 ...SEVERE THUNDERSTORM WATCH NORTHEAST MISSOURI UNTIL 7AM... AT 450 AM..A LINE OF VERY STRONG THUNDERSTORMS WAS LOCATED ACROSS THE NORTHERN PORTIONS OF SCHUYLER AND SCOTLAND COUNTIES. THE STRONGEST STORM WAS LOCATED JUST NORTH OF MEMPHIS IN SCOTLAND COUNTY. THESE STORMS ARE PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING.. AS WELL AS A CHANCE FOR HAIL OR HIGH WINDS. BETWEEN 5 AND 6AM...VERY STRONG THUNDERSTORMS WILL MOVE ACROSS THE REMAINDER OF SCHUYLER..SCOTLAND AND CLARK COUNTIES AND INTO PARTS OF ADAIR AND KNOX COUNTIES. PERSONS IN THESE COUNTIES SHOULD KEEP ALERT FOR POSSIBLE SEVERE WEATHER. FELDT
Special weather statement, May 24, 6:53 AM CDT, 3 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAINT LOUIS, MO 700 AM CDT WED MAY 24 1989 ...SEVERE THUNDERSTORM WATCH EXPIRES... SEVERE THUNDERSTORM WATCH NO 311 WILL EXPIRE AT 7AM. eONE REMAINING STRONG THUNDERSTORM WAS INDICATED IN SOUTHEAST IOWA..AND IT COULD MOVE ACROSS CLARK COUNTY MISSOURI BEFORE 8AM.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 4:06 AM CDT | Severe Thunderstorm Warning | LSX | Clark, Scotland | 69 min |
| May 24, 4:06 AM CDT | Severe Thunderstorm Warning | LSX | Schuyler | 69 min |
| May 24, 9:12 AM CDT | Severe Thunderstorm Warning | LSX | Adair, Knox | 48 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1989Every severe thunderstorm warning in 1989
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.