Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 189, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 7, 1999, 11:31 PM CDT for Cole County, Missouri. It was in force for 64 min. 1 report 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
- Aug 7, 1999, 11:31 PM CDT (04:31 UTC)
- Expired
- Aug 8, 1999, 12:35 AM CDT
- In force
- 64 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Cole County, MO
The radar
The St Louis radar (KLSX), 141 km from the middle of the area, began a volume at 04:32 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 12:05 AM CDT | Thunderstorm Wind 70 | Jefferson City, 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 00:00Z, 4.5 hours before the alert went out and 223 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
- 719 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 2377 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 1:45 PM CDT, 9 hours 46 minutes earlier.
Area forecast discussion, Aug 7, 1:45 PM CDT, 9 hours 46 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 145 PM CDT SAT AUG 7 1999 SATL LOOP SHOWS TOPS HV BEEN COOLG SINCE ABT 17Z ACRS E CNTRL MO WITH SUM MUCH NEEDED RN ACRS RGN. MCS CONTS TO ROLL ESEWD WITH HVIEST PCPN JST SE OF METRO AREA. SANGSTER CHART FM LT MRNG SHOWED FAIRLY DECENT LOW LVL INFLOW WITH 25 KTS FM SW INTO NE MO. ADAP WOOD SUGGST LN OF TRW WILL CONT TO ROLL ACRS SRN PTN OF AREA THIS AFTN WITH FAIRLY DECENT MSTR CNVGC ACRS NW MO/NE KS AHD OF FNT. MCS TOOK THE STARCH OUT ACRS MUCH OF N AND CNTRL MO SO MAY BE AWHILE BFR DVLPMNT OCCURS. WILL FOLLOW TREND OF ETA LOW LVL MSTR CNVGC OVRNGT AS WELL REMEMBER BIG BUST WITH CD FNT IN LT JULY. AT MIDN, ETA FCSTS DECENT LOW LVL MSTR CNVGC ACRS SRN THIRD OF MO WHILE NGM FCSTS TREEMENDUS MSTR CNVGC FM CNTRL IL ACRS NRN OZARKS. ETA WAS RIGHT IN JULY. .STL...NONE
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 10:58 PM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 62 min |
| Aug 7, 11:19 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 51 min |
| Aug 8, 12:05 AM CDT | Severe Thunderstorm Warning | LSX | Osage | 65 min |
| Aug 8, 12:15 AM CDT | Severe Thunderstorm Warning | LSX | Crawford, Gasconade | 65 min |
| Aug 8, 12:40 AM CDT | Severe Thunderstorm Warning | LSX | Franklin, Warren | 50 min |
| Aug 8, 12:53 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 32 min |
| Aug 8, 1:10 AM CDT | Flash Flood Warning | LSX | Crawford, Washington | 5 hr |
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; radar from the NEXRAD Level II archive.