Alert archive / Missouri / Heat Advisories in 2015
Heat Advisory 6, NWS St. Louis, MO
NWS St. Louis, MO issued this heat advisory at Jul 26, 2015, 3:55 PM CDT for 24 counties in Missouri; 17 counties in Illinois. It took effect at Jul 27, 2015, 12:00 PM CDT. It was in force for 33 hr.
The area
The counties it named.
The facts
- Issued
- Jul 26, 2015, 3:55 PM CDT (20:55 UTC)
- In effect from
- Jul 27, 2015, 12:00 PM CDT
- Expired
- Jul 28, 2015, 9:00 PM CDT
- In force
- 33 hr
- Issued by
- NWS St. Louis, MO
All 41 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, City of Saint Louis, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Madison County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shelby County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 15 km from the middle of the area, began a volume at 20:55 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
Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 229 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
- 708 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 939 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
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 26, 3:31 PM CDT, 24 minutes earlier.
Area forecast discussion, Jul 26, 3:31 PM CDT, 24 minutes before
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</html>Hazardous weather outlook, Jul 26, 6:02 AM CDT, 9 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 602 AM CDT SUN JUL 26 2015 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-271115- 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- 602 AM CDT SUN JUL 26 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. SOME OF THESE STORMS WILL BE STRONG...WITH THE MOST INTENSE STORMS PRODUCING STRONG WINDS AND POSSIBLY HAIL. IN ADDITION...SOME OF THE STORMS WILL PRODUCE HEAVY RAIN...ESPECIALLY OVER PARTS OF NORTHEAST AND CENTRAL MISSOURI AND WEST CENTRAL ILLINOIS THIS MORNING. BECAUSE OF THIS CONTINUED THREAT...THE FLASH FLOOD WATCH FOR THESE AREAS HAS BEEN EXTENDED UNTIL MIDDAY. THE RETURN OF AFTERNOON SUNSHINE ACROSS PARTS OF MID MISSOURI WILL PUSH THE HEAT INDEX TO AROUND 105 DEGREES...AND A HEAT ADVISORY IS IN EFFECT FOR THIS AREA FROM NOON UNTIL 7PM. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY 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 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 ON MONDAY...WITH READINGS POSSIBLY REACHING 110 DEGREES IN A FEW LOCATIONS ON TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE TODAY. SPOTTERS ARE REQUESTED TO REPORT ANY RAINFALLS OF AN INCH OR MORE. TRUETT
In the hours before
Special weather statement, Jul 26, 10:15 AM CDT, 5 hours 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1015 AM CDT SUN JUL 26 2015
MOZ035-036-261600-
PIKE MO-RALLS MO-
1015 AM CDT SUN JUL 26 2015
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN RALLS AND NORTHWESTERN
PIKE COUNTIES IN NORTHEASTERN MISSOURI UNTIL 1100 AM CDT...
AT 1015 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR SPAULDING...MOVING EAST AT 30 MPH.
DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.
LOCATIONS IMPACTED INCLUDE...
NEW LONDON...CENTER...FRANKFORD...RENSSELAER...SPAULDING...
SPENCERBURG AND THE LANDING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 3960 9118 3937 9125 3951 9171 3953 9171
3968 9166
TIME...MOT...LOC 1515Z 286DEG 25KT 3958 9160
BYRDThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 2:10 AM CDT | Special Weather Statement | LSX | Boone, Moniteau | 50 min |
| Jul 26, 2:54 AM CDT | Special Weather Statement | LSX | Callaway, Cole, Moniteau, Osage | 51 min |
| Jul 26, 3:24 AM CDT | Flash Flood Warning | LSX | Shelby | 6 hr |
| Jul 26, 4:23 AM CDT | Special Weather Statement | LSX | Franklin, Lincoln, Saint Charles, Saint Louis, Warren | 52 min |
| Jul 26, 10:15 AM CDT | Special Weather Statement | LSX | Ralls | 45 min |
| Jul 26, 12:14 PM CDT | River Flood Warning | LSX | Marion | 28 hr |
| Jul 26, 1:12 PM CDT | River Flood Warning | LSX | Marion | 35 hr |
| Jul 26, 2:41 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 34 min |
| Jul 26, 4:45 AM CDT | Flash Flood Warning | LSX | Pike | 6 hr |
| Jul 26, 5:03 AM CDT | Flash Flood Warning | LSX | Adams | 5 hr |
Nearby
Heat Advisories in Missouri, 2015Heat Advisories in Illinois, 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.