Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 81, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 16, 1999, 12:08 PM CDT for Washington County, Missouri. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 16, 1999, 12:08 PM CDT (17:08 UTC)
- Expired
- May 16, 1999, 1:00 PM CDT
- In force
- 52 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, MO
The radar
The St Louis radar (KLSX), 84 km from the middle of the area, began a volume at 17:11 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 12:00Z, 5.1 hours before the alert went out and 284 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
- 1981 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 384 m²/s²
- 0-3 km storm-relative helicity
- 364 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSTL 161710 RRA SVRSTL MOC221-161800- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1208 PM CDT SUN MAY 16 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WASHINGTON COUNTY IN EAST CENTRAL MISSOURI * UNTIL 100 PM CDT THIS REPLACES AND EXTENDS THE EARLIER WARNING FOR WASHINGTON COUNTY * AT 1203 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 17 MILES NORTHWEST OF POTOSI TO 15 MILES SOUTH OF POTOSI... MOVING EAST AT 25 MPH. * LOCATIONS THAT WILL BE AFFECTED... POTOSI OLD MINES OTHER COMMUNITIES ALONG AND NEAR HIGHWAY 21 3/4 INCH DIAMETER HAIL WAS REPORTED NEAR BELGRADE AT 1142 AM BY FIRE DEPARTMENT OFFICIALS THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. JP &
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, May 16, 7:05 AM CDT, 5 hours 3 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-161630- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 705 AM CDT SUN MAY 16 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 PORTIONS OF CENTRAL AND NORTHEAST MISSOURI AS WELL AS A LARGE PORTION OF WEST CENTRAL ILLINOIS. THE SLIGHT RISK AREA IS GENERALLY ALONG AND NORTH OF A SEDALIA...COLUMBIA...VANDALIA...PITTSFIELD LINE. THE MAIN SEVERE WEATHER THREAT IS DAMAGING WINDS AND LARGE HAIL. EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD REMAIN ALERT FOR POSSIBLE SKYWARN ACTIVATION. GLASS
Special weather statement, May 16, 7:05 AM CDT, 5 hours 3 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-161630- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 705 AM CDT SUN MAY 16 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 PORTIONS OF CENTRAL AND NORTHEAST MISSOURI AS WELL AS A LARGE PORTION OF WEST CENTRAL ILLINOIS. THE SLIGHT RISK AREA IS GENERALLY ALONG AND NORTH OF A SEDALIA...COLUMBIA...VANDALIA...PITTSFIELD LINE. THE MAIN SEVERE WEATHER THREAT IS DAMAGING WINDS AND LARGE HAIL. EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD REMAIN ALERT FOR POSSIBLE SKYWARN ACTIVATION. GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 11:11 AM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 64 min |
| May 16, 11:21 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 64 min |
| May 16, 4:59 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.