Alert archive / Alabama / Freeze Watches in 2018

Freeze Watch 2, NWS Mobile, AL

March 13, 201812 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this freeze watch at Mar 13, 2018, 3:11 PM CDT for 12 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; Greene County, Perry County, Wayne County, Mississippi. It took effect at Mar 15, 2018, 2:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 13, 2018, 3:11 PM CDT (20:11 UTC)
In effect from
Mar 15, 2018, 2:00 AM CDT
Expired
Mar 14, 2018, 2:45 AM CDT
In force
Issued by
NWS Mobile, AL

Counties Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 20:08 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.2 hours before the alert went out and 236 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, Slidell Radar S, LA at 12:00Z on 2018-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2018-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -121 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1309 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-121 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this freeze watch went out at Mar 13, 12:13 PM CDT, 2 hours 58 minutes earlier.

Area forecast discussion, Mar 13, 12:13 PM CDT, 2 hours 58 minutes before
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Hazardous weather outlook, Mar 13, 9:32 AM CDT, 5 hours 39 minutes before
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 13, 3:11 PM CDTFrost AdvisoryMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more16 hr

Nearby

Freeze Watches in Alabama, 2018Freeze Watches in Florida, 2018Freeze Watches in Mississippi, 2018Every freeze watch in 2018

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.