Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 8, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jan 21, 1999, 12:51 PM CST for Audrain County, Boone County, Missouri. It was in force for 34 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 21, 1999, 12:51 PM CST (18:51 UTC)
- Expired
- Jan 21, 1999, 1:25 PM CST
- In force
- 34 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Audrain County, MO, Boone County, MO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 21, 12:55 PM CST | Hail 1 | Hallsville, MO | |
| Jan 21, 12:57 PM CST | Hail 1.75 | Sturgeon, MO | |
| Jan 21, 1:00 PM CST | Hail 1.75 | Sturgeon, MO |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 6.9 hours before the alert went out and 288 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
- 911 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 533 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 239 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSTL 211850 RRA SVRSTL MOC007-019-211925- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1251 PM CST THU JAN 21 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN AUDRAIN COUNTY IN CENTRAL MISSOURI NORTHERN BOONE COUNTY IN CENTRAL MISSOURI * UNTIL 125 PM CST * AT 1249 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHERN BOONE COUNTY... MOVING NORTHEAST AT 35 MPH. * LOCATIONS THAT WILL BE AFFECTED... STURGEON CENTRALIA THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY FROM WINDOWS. RP/DB
What 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, Jan 21, 6:55 AM CST, 5 hours 56 minutes before
ILZ058-059-095>102-MOZ009-010-018-019-026-027-034>036-041-042- 047>052-059>065-072-073-211730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 655 AM CST THU JAN 21 1999 ...A NEW WINTER STORM WILL CAUSE SIGNIFICANT CHANGES OVER EASTERN MISSOURI AND WEST CDNTRAL INTO SOUTHWEST ILLINOIS FRIDAY NIGHT INTO SATURDAY... AN INTENSE STORM SYSTEM WILL DEVELOP OVER OKLAHOMA TODAY...THEN DEEPEN QUICKLY AS IT MOVES FROM CENTRAL ARKANSAS NORTHEAST INTO CENTRAL ILLINOIS BY EARLY SATURDAY MORNING. WEATHER CONDITIONS WILL BE QUITE VARIABLE FROM THIS STORM...FIRST A STEADY RAIN THURSDAY NIGHT AND FRIDAY WITH EMBEDDED THUNDERSTORMS. THEN...AS THE STORM LIFTS BY TO THE EAST... COLDER AIR WILL CAUSE THE RAIN TO CHANGE TO SNOW FROM THE WEST FRIDAY NIGHT AND EARLY SATURDAY. TEMPERATURES WILL FALL BELOW FREEZING LATE FRIDAY NIGHT AND EARLY SATURDAY AND RAIN SLICKED SURFACES COULD FREEZE CREATING ICY AND VERY HAZARDOUS TRAVEL AND WALKING CONDITIONS. IN ADDITION... THE RAIN WILL GRADUALLY CHANGE TO SNOW FROM WEST TO EAST. SIGNIFICANT ACCUMULATIONS OF SNOW WILL BE POSSIBLE BY SATURDAY MORNING. MOST LIKELY AREA FOR SNOW WILL BE ALONG AND 60 MILES EITHER SIDE OF A LINE FROM 50 MILES SOUTHWEST OF ST LOUIS TO QUINCY ILLINOIS. ONCE THE SNOW BEGINS...IF TRAVEL IS NECESSARY...MOTORISTS SHOULD BE PREPARED FOR SEVERE WINTER WEATHER CONDITIONS. DRESS WARMLY AND MAKE SURE YOUR CAR IS IN GOOD RUNNING CONDITION. BE SURE THAT YOUR CAR IS WINTERIZED AND THAT BRAKES...LIGHTS...BATTERY...EXHAUST...HEATER CONNECTIONS...DEFROSTER...AND WINDSHIELD WIPERS ARE IN GOOD WORKING ORDER. STAY TUNED TO NOAA WEATHER RADIO...OR THE COMMERCIAL MEDIA FOR LATER STATEMENTS CONCERNING THIS DANGEROUS WINTER WEATHER SITUATION. PEDIGO
Special weather statement, Jan 21, 9:50 AM CST, 3 hours 1 minute before
MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047- 051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095- 064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074- MOZ065-221200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 950 AM CST THU JAN 21 1999 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT ACROSS SOUTHERN SECTIONS OF THE COUNTY WARNING AREA...GENERALLY SOUTH OF A LINE FROM JEFFERSON CITY TO BELLEVILLE. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS...AND MONITOR LATER WEATHER INFORMATION FOR POSSIBLE SKYWARN ACTION. GKS
Special weather statement, Jan 21, 10:16 AM CST, 2 hours 35 minutes before
MOZ063-211635- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1016 AM CST THU JAN 21 1999 ...TEST....TEST....TEST....
Special weather statement, Jan 21, 10:17 AM CST, 2 hours 34 minutes before
MOZ062-211635- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1017 AM CST THU JAN 21 1999 TEST...TEST....TEST...THIS IS A TEST// RP
Special weather statement, Jan 21, 10:25 AM CST, 2 hours 26 minutes before
MOZ062-211645- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1025 AM CST THU JAN 21 1999 THIS IS A TEST.....THIS IS A TEST....THIS IS A TEST... THIS IS ONLY A TEST... RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 9:56 AM CST | Severe Thunderstorm Warning | LSX | Osage | 49 min |
| Jan 21, 10:13 AM CST | Severe Thunderstorm Warning | LSX | Gasconade | 47 min |
| Jan 21, 10:39 AM CST | Severe Thunderstorm Warning | LSX | Moniteau | 46 min |
| Jan 21, 11:04 AM CST | Severe Thunderstorm Warning | LSX | Montgomery | 46 min |
| Jan 21, 11:43 AM CST | Severe Thunderstorm Warning | LSX | Lincoln | 47 min |
| Jan 21, 11:45 AM CST | Severe Thunderstorm Warning | LSX | Boone | 45 min |
| Jan 21, 12:01 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Monroe | 49 min |
| Jan 21, 1:04 PM CST | Severe Thunderstorm Warning | LSX | Monroe | 46 min |
| Jan 21, 1:11 PM CST | Severe Thunderstorm Warning | LSX | Madison, Saint Francois | 49 min |
| Jan 21, 5:41 PM CST | Severe Thunderstorm Warning | LSX | Madison | 49 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.