Alert archive / Missouri / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 179, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 15, 2009, 4:58 PM CDT for Madison County, Missouri. It was in force for 47 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
- Jul 15, 2009, 4:58 PM CDT (21:58 UTC)
- Expired
- Jul 15, 2009, 5:45 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
County Madison County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 21:59 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 15, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 10.0 hours before the alert went out and 297 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
- 1320 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 1142 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 Jul 15, 3:28 PM CDT, 1 hour 30 minutes earlier.
Area forecast discussion, Jul 15, 3:28 PM CDT, 1 hour 30 minutes before
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</html>Hazardous weather outlook, Jul 15, 4:04 PM CDT, 54 minutes before
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Special weather statement, Jul 15, 2:49 PM CDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 249 PM CDT WED JUL 15 2009 MOZ099-152045- REYNOLDS MO- 249 PM CDT WED JUL 15 2009 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN REYNOLDS COUNTY UNTIL 345 PM CDT... AT 248 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11 MILES SOUTH OF SALEM...MOVING SOUTHEAST AT 25 MPH. HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... BUNKER AROUND 330 PM CDT. OATES AROUND 340 PM CDT. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. BROWNING
Local storm report, Jul 15, 3:58 PM CDT, 1 hour before
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</html>Special weather statement, Jul 15, 4:48 PM CDT, 10 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 3:10 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 50 min |
| Jul 15, 7:27 AM CDT | Areal Flood Advisory | LSX | Greene, Jersey, Macoupin | 5 hr |
| Jul 15, 8:22 AM CDT | Flash Flood Warning | LSX | Greene, Jersey, Macoupin | 5 hr |
| Jul 15, 8:57 AM CDT | Areal Flood Advisory | LSX | Bond, Madison, Montgomery | 5 hr |
| Jul 15, 9:48 AM CDT | Areal Flood Advisory | LSX | Marion | 4 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 2009Every severe thunderstorm warning in 2009
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.