Alert archive / Georgia / Mesoscale Discussions in 2003
Mesoscale Discussion 1056
The Storm Prediction Center issued this mesoscale discussion at May 18, 2003, 1:16 PM EDT for 14 counties in Florida; 15 counties in Georgia. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2003, 1:16 PM EDT (17:16 UTC)
- Expired
- May 18, 2003, 3:15 PM EDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 29 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Madison County, FL, Nassau County, FL, Putnam County, FL, Suwannee County, FL, Union County, FL, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Cook County, GA, Echols County, GA, Lanier County, GA, Lowndes County, GA, Pierce County, GA, Ware County, GA
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 5.3 hours before the alert went out and 100 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
- 2020 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 6:52 AM EDT | Mesoscale Discussion | SPC | Bay, Escambia, Holmes, Okaloosa, Santa Rosa, Walton and 1 more | 53 min |
| May 18, 11:18 AM EDT | Mesoscale Discussion | SPC | Calhoun, Escambia, Gadsden, Holmes, Jackson, Leon and 5 more | 87 min |
| May 18, 12:00 PM EDT | Tornado Watch | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 8 more | 5 hr |
| May 18, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more | 6 hr |
| May 18, 2:10 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Gadsden, Gulf, Holmes, Jackson and 3 more | 95 min |
| May 18, 6:22 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 15 more | 83 min |
| May 18, 1:10 PM EDT | Tornado Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Effingham and 17 more | 6 hr |
| May 18, 5:57 PM EDT | Mesoscale Discussion | SPC | Burke, Candler, Columbia, Emanuel, Jefferson, Jenkins and 6 more | 63 min |
Nearby
Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Florida, 2003Every mesoscale discussion in 2003
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.