Alert archive / Missouri / Heat Advisories in 2019
Heat Advisory 5, NWS St. Louis, MO
NWS St. Louis, MO issued this heat advisory at Aug 19, 2019, 10:01 AM CDT for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri; Madison County, Saint Clair County, Illinois. It took effect at Aug 19, 2019, 1:00 PM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Aug 19, 2019, 10:01 AM CDT (15:01 UTC)
- In effect from
- Aug 19, 2019, 1:00 PM CDT
- Expired
- Aug 19, 2019, 8:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS St. Louis, MO
Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 3.0 hours before the alert went out and 216 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
- 399 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1179 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this heat advisory 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 heat advisory went out at Aug 19, 6:33 AM CDT, 3 hours 28 minutes earlier.
Area forecast discussion, Aug 19, 6:33 AM CDT, 3 hours 28 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 |
|---|---|---|---|---|
| Aug 19, 2:06 PM CDT | Special Weather Statement | LSX | Reynolds | 39 min |
| Aug 19, 4:28 PM CDT | Special Weather Statement | LSX | Sainte Genevieve | 47 min |
| Aug 19, 6:04 PM CDT | Special Weather Statement | LSX | Saint Clair | 41 min |
| Aug 19, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 35 min |
| Aug 19, 6:25 PM CDT | Special Weather Statement | LSX | Marion | 50 min |
| Aug 19, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 19 min |
| Aug 19, 6:44 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Madison | 31 min |
Nearby
Heat Advisories in Missouri, 2019Heat Advisories in Illinois, 2019Every heat advisory in 2019
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.