Alert archive / Missouri / Frost Advisories in 2012
Frost Advisory 2, NWS St. Louis, MO
NWS St. Louis, MO issued this frost advisory at Sep 22, 2012, 3:50 PM CDT for Adams County, Brown County, Pike County, Illinois; 4 counties in Missouri. It took effect at Sep 23, 2012, 4:00 AM CDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 22, 2012, 3:50 PM CDT (20:50 UTC)
- In effect from
- Sep 23, 2012, 4:00 AM CDT
- Expired
- Sep 23, 2012, 8:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
Counties Adams County, IL, Brown County, IL, Pike County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 20:49 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
Davenport, (KDVN), launched 12:00Z, 8.8 hours before the alert went out and 207 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
- 1551 m above ground
- 0-6 km bulk shear
- 99 kt
- 0-1 km storm-relative helicity
- -95 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
765 WWUS73 KLSX 222050 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 350 PM CDT SAT SEP 22 2012 ILZ095>097-MOZ018-019-026-027-230900- /O.NEW.KLSX.FR.Y.0002.120923T0900Z-120923T1300Z/ ADAMS IL-BROWN IL-PIKE IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO- INCLUDING THE CITIES OF...QUINCY...HANNIBAL 350 PM CDT SAT SEP 22 2012 ...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...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. && $$ KANOFSKY
2 follow-up statements
165 WWUS73 KLSX 230857 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 357 AM CDT SUN SEP 23 2012 ILZ095>097-MOZ018-019-026-027-231300- /O.CON.KLSX.FR.Y.0002.120923T0900Z-120923T1300Z/ ADAMS IL-BROWN IL-PIKE IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO- INCLUDING THE CITIES OF...QUINCY...HANNIBAL 357 AM CDT SUN SEP 23 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * TIMING...THROUGH 8AM. * TEMPERATURES...MID TO UPPER 30S THROUGH DAYBREAK...WITH A RAPID WARMUP AFTER 8AM. * IMPACTS...FROST MAY DAMAGE SENSITIVE VEGETATION IF IT IS LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY IS ISSUED WHEN FROST IS EXPECTED TO DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL INTERESTS IN THE ADVISORY AREA SHOULD PROTECT TENDER VEGETATION. ALSO...POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE AWAY FROM THE COLD. && $$ TRUETT
621 WWUS73 KLSX 231253 NPWLSX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 753 AM CDT SUN SEP 23 2012 ILZ095>097-MOZ018-019-026-027-231400- /O.EXP.KLSX.FR.Y.0002.000000T0000Z-120923T1300Z/ ADAMS IL-BROWN IL-PIKE IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO- INCLUDING THE CITIES OF...QUINCY...HANNIBAL 753 AM CDT SUN SEP 23 2012 ...FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING... TEMPERATURES HAVE BEGUN TO RISE UNDER SUNNY SKIES...SO ANY FROST THAT FORMED OVERNIGHT WILL BEGIN TO DISSIPATE. THE ADVISORY HAS BEEN ALLOWED TO EXPIRE. $$ BYRD
Nearby
Frost Advisories in Missouri, 2012Frost 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.