Alert archive / Missouri / Frost Advisories in 2014

Frost Advisory 2, NWS St. Louis, MO

May 16, 20148 counties in Missouri; Adams County, Brown County, Pike County, Illinois

NWS St. Louis, MO issued this frost advisory at May 16, 2014, 2:58 PM CDT for 8 counties in Missouri; Adams County, Brown County, Pike County, Illinois. It took effect at May 17, 2014, 4:00 AM CDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
May 16, 2014, 2:58 PM CDT (19:58 UTC)
In effect from
May 17, 2014, 4:00 AM CDT
Expired
May 17, 2014, 7:00 AM CDT
In force
3 hr
Issued by
NWS St. Louis, MO

Counties Adams County, IL, Brown County, IL, Pike County, IL, Audrain County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 136 km from the middle of the area, began a volume at 19:56 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, 8.0 hours before the alert went out and 228 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.

Skew-T log-pSkew-T log-p diagram, Davenport, at 12:00Z on 2014-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2014-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -39 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
489 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-39 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

716 
WWUS73 KLSX 161958
NPWLSX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
258 PM CDT FRI MAY 16 2014

ILZ095>097-MOZ018-019-026-027-034>036-042-171200-
/O.NEW.KLSX.FR.Y.0002.140517T0900Z-140517T1200Z/
ADAMS IL-AUDRAIN MO-BROWN IL-KNOX MO-LEWIS MO-MARION MO-MONROE MO-
PIKE IL-PIKE MO-RALLS MO-SHELBY MO-
INCLUDING THE CITIES OF...BOWLING GREEN...HANNIBAL...MEXICO...
QUINCY
258 PM CDT FRI MAY 16 2014

...FROST ADVISORY IN EFFECT FROM 4 AM TO 7 AM CDT SATURDAY...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO 7 AM CDT SATURDAY.

* TIMING...FROST MAY BEGIN TO DEVELOP AS EARLY AS 4 AM AND
  CONTINUE THROUGH 7 AM.

* TEMPERATURES...IN THE MID 30S.

* IMPACTS...TENDER VEGETATION MAY BE DAMAGED BY THE FROST.

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.

&&

$$

CARNEY
1 follow-up statement
176 
WWUS73 KLSX 171153
NPWLSX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
653 AM CDT SAT MAY 17 2014

ILZ095>097-MOZ018-019-026-027-034>036-042-171300-
/O.EXP.KLSX.FR.Y.0002.000000T0000Z-140517T1200Z/
ADAMS IL-AUDRAIN MO-BROWN IL-KNOX MO-LEWIS MO-MARION MO-MONROE MO-
PIKE IL-PIKE MO-RALLS MO-SHELBY MO-
INCLUDING THE CITIES OF...BOWLING GREEN...HANNIBAL...MEXICO...
QUINCY
653 AM CDT SAT MAY 17 2014

...FROST ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING...

TEMPERATURES WILL CONTINUE TO CLIMB OUT OF THE 30S THIS
MORNING...THEREFORE THE FROST ADVISORY WILL BE ALLOWED TO EXPIRE
AT 7 AM.

$$

KANOFSKY

Nearby

Frost Advisories in Missouri, 2014Frost Advisories in Illinois, 2014Every frost advisory in 2014

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.