Alert archive / Florida / Mesoscale Discussions in 2014

Mesoscale Discussion 191

March 16, 2014Coffee County, Geneva County, Houston County, Alabama; 6 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Mar 16, 2014, 7:51 AM CDT for Coffee County, Geneva County, Houston County, Alabama; 6 counties in Florida. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Mar 16, 2014, 7:51 AM CDT (12:51 UTC)
Expired
Mar 16, 2014, 9:15 AM CDT
In force
84 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Coffee County, AL, Geneva County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Holmes County, FL, Jackson County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 38 km from the middle of the area, began a volume at 12:51 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.9 hours before the alert went out and 131 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, Tallahassee Rgnl, FL at 12:00Z on 2014-03-16Temperature 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, Tallahassee Rgnl, FL at 12:00Z on 2014-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 423 square meters per square second.1939587897Sfc1 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
891 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
423 m²/s²
0-3 km storm-relative helicity
431 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 16, 4:20 AM CDTMesoscale DiscussionSPCMobile, Washington115 min
Mar 16, 4:51 AM CDTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more7 hr
Mar 16, 6:31 AM CDTMesoscale DiscussionSPCBaldwin, Clarke, Escambia, Mobile, Monroe, Washington and 1 more89 min
Mar 16, 8:59 AM CDTTornado WatchSPCBarbour, Coffee, Dale, Geneva, Henry, Houston and 1 more8 hr
Mar 16, 10:27 AM CDTMesoscale DiscussionSPCHouston93 min
Mar 16, 1:02 PM CDTMesoscale DiscussionSPCHamilton118 min
Mar 16, 2:55 PM CDTMesoscale DiscussionSPCLafayette, Taylor, Wakulla95 min

Nearby

Mesoscale Discussions in Florida, 2014Mesoscale Discussions in Alabama, 2014Every mesoscale discussion 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.