Alert archive / Missouri / Heat Advisories in 2015
Heat Advisory 5, NWS St. Louis, MO
NWS St. Louis, MO issued this heat advisory at Jul 25, 2015, 4:05 PM CDT for 5 counties in Missouri. It took effect at Jul 26, 2015, 12:00 PM CDT. It was in force for 28 hr.
The area
The counties it named.
The facts
- Issued
- Jul 25, 2015, 4:05 PM CDT (21:05 UTC)
- In effect from
- Jul 26, 2015, 12:00 PM CDT
- Expired
- Jul 27, 2015, 3:40 PM CDT
- In force
- 28 hr
- Issued by
- NWS St. Louis, MO
Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 131 km from the middle of the area, began a volume at 21:07 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
Topeka, KS (KFOE), launched 12:00Z, 9.1 hours before the alert went out and 301 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
- 157 J/kg
- Mixed-layer CIN
- -456 J/kg
- Mixed-layer LCL
- 1208 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 Jul 25, 3:52 PM CDT, 13 minutes earlier.
Area forecast discussion, Jul 25, 3:52 PM CDT, 13 minutes before
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</html>Hazardous weather outlook, Jul 25, 5:57 AM CDT, 10 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 557 AM CDT SAT JUL 25 2015 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-261100- GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL- CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO- LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO- AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO- LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 557 AM CDT SAT JUL 25 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TODAY AND TONIGHT SEVERAL ROUNDS OF THUNDERSTORMS ARE EXPECTED ACROSS THE REGION TODAY AND TONIGHT. SOME OF THESE STORMS WILL BE STRONG TO SEVERE...WITH THE MOST INTENSE STORMS PRODUCING HAIL AND STRONG WINDS. HEAVY RAIN CAN ALSO BE EXPECTED. HEAT INDEX VALUES OF AROUND 105 DEGREES ARE EXPECTED OVER PARTS OF CENTRAL AND SOUTHEAST MISSOURI THIS AFTERNOON AND EARLY THIS EVENING...AND A HEAT ADVISORY IS IN EFFECT FOR THESE AREAS. PLEASE SEE THE HEAT ADVISORY PRODUCT FOR ADDITIONAL DETAILS. MAJOR FLOODING IS ONGOING ALONG THE ILLINOIS RIVER FROM LA GRANGE TO MEREDOSIA. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORMS ARE LIKELY OVER PARTS OF THE AREA SUNDAY MORNING...WITH ADDITIONAL CHANCES FOR STORMS SUNDAY AFTERNOON INTO SUNDAY NIGHT. SOME STRONG TO SEVERE STORMS ARE POSSIBLE. HEAVY RAIN WILL ALSO REMAIN A POSSIBILITY...ESPECIALLY SUNDAY MORNING. THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS FOR MONDAY THROUGH TUESDAY NIGHT....PRIMARILY ALONG AND EAST OF THE MISSISSIPPI RIVER. A COLD FRONT WILL MOVE THROUGH THE REGION WEDNESDAY NIGHT AND THURSDAY BRINGING A CHANCE FOR STORMS TO MUCH OF THE AREA. HEAT INDEX READINGS OF 100 TO 105 WILL BE POSSIBLE ACROSS MUCH OF THE AREA SUNDAY AND MONDAY...WITH READINGS POSSIBLY REACHING 110 DEGREES IN A FEW LOCATIONS BY TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY TODAY AND TONIGHT. TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 2:16 AM CDT | Special Weather Statement | LSX | Audrain, Boone, Monroe, Shelby | 44 min |
| Jul 25, 4:31 AM CDT | Flash Flood Warning | LSX | Moniteau | 6 hr |
| Jul 25, 4:09 PM CDT | Flash Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Knox, Lewis and 8 more | 20 hr |
Nearby
Heat Advisories in Missouri, 2015Every heat advisory in 2015
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.