Alert archive / Missouri / Frost Advisories in 2011
Frost Advisory 2, NWS St. Louis, MO
NWS St. Louis, MO issued this frost advisory at Oct 1, 2011, 2:25 PM CDT for 24 counties in Missouri; 17 counties in Illinois. It took effect at Oct 2, 2011, 4:00 AM CDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Oct 1, 2011, 2:25 PM CDT (19:25 UTC)
- In effect from
- Oct 2, 2011, 4:00 AM CDT
- Expired
- Oct 2, 2011, 8:00 AM CDT
- In force
- 4 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 19:25 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, 7.4 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 897 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
461 WWUS73 KLSX 011925 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 225 PM CDT SAT OCT 1 2011 ...FROST LIKELY SUNDAY MORNING... .A CANADIAN HIGH PRESSURE SYSTEM WILL CONTINUE TO BUILD ACROSS THE AREA THIS WEEKEND AND USHER AN UNSEASONABLY COOL AIRMASS INTO THE REGION. TEMPERATURES ARE EXPECTED TO DROP INTO THE MID 30S. THESE COOL TEMPERATURES ALONG WITH LIGHT WINDS AND CLEAR SKIES WILL RESULT IN AREAS OF FROST FORMING EARLY SUNDAY MORNING. FROST WILL BE MOST LIKELY IN SHELTERED AND LOW LYING LOCATIONS. ILZ058>060-064-065-069-095>102-MOZ018-019-026-027-034>036-042-051- 052-059>065-072>075-021000- /O.NEW.KLSX.FR.Y.0002.111002T0900Z-111002T1300Z/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON 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-AUDRAIN 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- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...QUINCY... EDWARDSVILLE...BELLEVILLE...HANNIBAL...BOWLING GREEN...MEXICO... ST CHARLES...UNION...ST LOUIS...FARMINGTON 225 PM CDT SAT OCT 1 2011 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM CDT SUNDAY... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO 8 AM CDT SUNDAY. * TIMING...FROST WILL DEVELOP EARLY SUNDAY MORNING AND LAST TO ABOUT AN HOUR AFTER SUNRISE. * TEMPERATURES...LOW TEMPERATURES IN THE MID 30S. * IMPACTS...SENSITIVE OUTDOOR PLANTS AND OTHER VEGETATION COULD BE DAMAGED OR EVEN KILLED BY THE COLD TEMPERATURES IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY IS ISSUED WHEN FROST IS EXPECTED TO DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL INTERESTS IN THE ADVISORY AREA SHOULD PROTECT TENDER VEGETATION. ALSO...POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE AWAY FROM THE COLD. && $$ BYRD
3 follow-up statements
002 WWUS73 KLSX 020154 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 854 PM CDT SAT OCT 1 2011 ...FROST LIKELY SUNDAY MORNING... .A CANADIAN HIGH PRESSURE SYSTEM WILL CONTINUE TO BUILD ACROSS THE AREA THIS WEEKEND AND USHER AN UNSEASONABLY COOL AIRMASS INTO THE REGION. TEMPERATURES ARE EXPECTED TO DROP INTO THE MID 30S. THESE COOL TEMPERATURES ALONG WITH LIGHT WINDS AND CLEAR SKIES WILL RESULT IN AREAS OF FROST FORMING EARLY SUNDAY MORNING. FROST WILL BE MOST LIKELY IN SHELTERED AND LOW LYING LOCATIONS. ILZ070-074-079-MOZ084-085-099-021300- /O.EXA.KLSX.FR.Y.0002.111002T0900Z-111002T1300Z/ MARION IL-WASHINGTON IL-RANDOLPH IL-IRON MO-MADISON MO- REYNOLDS MO- INCLUDING THE CITIES OF...SALEM...CHESTER 854 PM CDT SAT OCT 1 2011 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM CDT SUNDAY... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO 8 AM CDT SUNDAY. * TIMING...FROST WILL DEVELOP EARLY SUNDAY MORNING AND LAST TO ABOUT AN HOUR AFTER SUNRISE. * TEMPERATURES...LOW TEMPERATURES IN THE MID 30S. * IMPACTS...SENSITIVE OUTDOOR PLANTS AND OTHER VEGETATION COULD BE DAMAGED OR EVEN KILLED BY THE COLD TEMPERATURES IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY IS ISSUED WHEN FROST IS EXPECTED TO DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL INTERESTS IN THE ADVISORY AREA SHOULD PROTECT TENDER VEGETATION. ALSO...POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE AWAY FROM THE COLD. && $$ ILZ058>060-064-065-069-095>102-MOZ018-019-026-027-034>036-042-051- 052-059>065-072>075-021300- /O.CON.KLSX.FR.Y.0002.111002T0900Z-111002T1300Z/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON 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-AUDRAIN 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- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...QUINCY... EDWARDSVILLE...BELLEVILLE...HANNIBAL...BOWLING GREEN...MEXICO... ST CHARLES...UNION...ST LOUIS...FARMINGTON 854 PM CDT SAT OCT 1 2011 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM CDT SUNDAY... * TIMING...FROST WILL DEVELOP EARLY SUNDAY MORNING AND LAST TO ABOUT AN HOUR AFTER SUNRISE. * TEMPERATURES...LOW TEMPERATURES IN THE MID 30S. * IMPACTS...SENSITIVE OUTDOOR PLANTS AND OTHER VEGETATION COULD BE DAMAGED OR EVEN KILLED BY THE COLD TEMPERATURES IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY IS ISSUED WHEN FROST IS EXPECTED TO DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL INTERESTS IN THE ADVISORY AREA SHOULD PROTECT TENDER VEGETATION. ALSO...POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE AWAY FROM THE COLD. && $$ GLASS
807 WWUS73 KLSX 020911 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 411 AM CDT SUN OCT 2 2011 ...FROST LIKELY EARLY TODAY... .CLEAR SKIES AND LIGHT WINDS WILL COMBINE WITH THE COOL CANADIAN AIRMASS THAT BLANKETS THE REGION TO DROP TEMPERATURES INTO THE 30S EARLY THIS MORNING. FROST WILL CONTINUE TO FORM UNTIL JUST AFTER DAYBREAK...WITH EARLY MORNING TEMPERATURES SUGGESTING THAT THE FROST WILL BE MOST WIDESPREAD FROM NORTHEAST MISSOURI INTO THE EASTERN OZARKS...AND OVER SOUTHWEST ILLINOIS. ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-042-051-052-059>065-072>075-084-085-099-021300- /O.CON.KLSX.FR.Y.0002.000000T0000Z-111002T1300Z/ 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- AUDRAIN 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- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... CHESTER...QUINCY...EDWARDSVILLE...BELLEVILLE...HANNIBAL... BOWLING GREEN...MEXICO...ST CHARLES...UNION...ST LOUIS... FARMINGTON 411 AM CDT SUN OCT 2 2011 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * TIMING...FROST WILL LINGER UNTIL AROUND 8 AM. * TEMPERATURES...EARLY MORNING TEMPERATURES WILL DROP INTO THE LOWER AND MIDDLE 30S...PRIMARILY IN SHELTERED AND LOW LYING AREAS. * IMPACTS...SENSITIVE OUTDOOR PLANTS AND OTHER VEGETATION WILL BE DAMAGED...AND POSSIBLY KILLED...BY THESE NEAR FREEZING TEMPERATURES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY IS ISSUED WHEN FROST IS EXPECTED TO DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL INTERESTS IN THE ADVISORY AREA SHOULD PROTECT TENDER VEGETATION. ALSO...POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE AWAY FROM THE COLD. && $$ TRUETT
746 WWUS73 KLSX 021254 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 754 AM CDT SUN OCT 2 2011 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-042-051-052-059>065-072>075-084-085-099-021400- /O.EXP.KLSX.FR.Y.0002.000000T0000Z-111002T1300Z/ 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- AUDRAIN 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- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... CHESTER...QUINCY...EDWARDSVILLE...BELLEVILLE...HANNIBAL... BOWLING GREEN...MEXICO...ST CHARLES...UNION...ST LOUIS... FARMINGTON 754 AM CDT SUN OCT 2 2011 ...FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING... THE FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING. $$ TILLY
Nearby
Frost Advisories in Missouri, 2011Frost Advisories in Illinois, 2011Every frost advisory in 2011
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.