Alert archive / Illinois / Frost Advisories in 2012
Frost Advisory 3, NWS St. Louis, MO
NWS St. Louis, MO issued this frost advisory at Sep 23, 2012, 3:05 PM CDT for 17 counties in Illinois. It took effect at Sep 24, 2012, 1:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Sep 23, 2012, 3:05 PM CDT (20:05 UTC)
- In effect from
- Sep 24, 2012, 1:00 AM CDT
- Expired
- Sep 24, 2012, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS St. Louis, MO
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
The radar
The St Louis radar (KLSX), 69 km from the middle of the area, began a volume at 20:10 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, 8.1 hours before the alert went out and 175 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
- 1267 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
743 WWUS73 KLSX 232005 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 305 PM CDT SUN SEP 23 2012 ILZ058>060-064-065-069-070-074-079-095>102-240815- /O.NEW.KLSX.FR.Y.0003.120924T0600Z-120924T1300Z/ 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- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... CHESTER...QUINCY...EDWARDSVILLE...BELLEVILLE 305 PM CDT SUN SEP 23 2012 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT MONDAY... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 1 AM TO 8 AM CDT MONDAY. * TIMING...LATE TONIGHT AND EARLY TOMORROW MORNING. * TEMPERATURES...MID TO UPPER 30S. * IMPACTS...FROST MAY DAMAGE SENSITIVE VEGETATION IF IT IS 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. && $$ KANOFSKY
2 follow-up statements
621 WWUS73 KLSX 240855 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 355 AM CDT MON SEP 24 2012 ILZ095-241000- /O.CAN.KLSX.FR.Y.0003.000000T0000Z-120924T1300Z/ ADAMS IL- INCLUDING THE CITY OF...QUINCY 355 AM CDT MON SEP 24 2012 ...FROST ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS CANCELLED THE FROST ADVISORY. TEMPERATURES OVER THE QUINCY AREA HAVE REMAINED IN THE 40S OVERNIGHT...AND LIGHT SOUTHEAST WINDS WILL HOLD TEMPERATURES IN THE UPPER 30S AND LOWER 40S THROUGH DAYBREAK. $$ ILZ058>060-064-065-069-070-074-079-096>102-241300- /O.CON.KLSX.FR.Y.0003.000000T0000Z-120924T1300Z/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-BROWN IL-PIKE IL-CALHOUN IL- JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... CHESTER...EDWARDSVILLE...BELLEVILLE 355 AM CDT MON SEP 24 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * TIMING...THROUGH 8AM * TEMPERATURES...MID TO UPPER 30S THROUGH DAYBREAK...WITH A RAPID WARMUP AFTER 8AM. * IMPACTS...FROST MAY DAMAGE SENSITIVE VEGETATION IF IT IS 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. && $$ TRUETT
961 WWUS73 KLSX 241314 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 814 AM CDT MON SEP 24 2012 ILZ058>060-064-065-069-070-074-079-096>102-241415- /O.EXP.KLSX.FR.Y.0003.000000T0000Z-120924T1300Z/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-BROWN IL-PIKE IL-CALHOUN IL- JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... CHESTER...EDWARDSVILLE...BELLEVILLE 814 AM CDT MON SEP 24 2012 ...FROST ADVISORY HAS EXPIRED... TEMPERATURES ARE RAPIDLY WARMING INTO THE 40S...ENDING THE FROST THREAT OVER WEST CENTRAL...SOUTHWEST...AND SOUTH CENTRAL ILLINOIS. $$ TRUETT
Nearby
Frost Advisories in Illinois, 2012Every frost advisory in 2012
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.