Alert archive / Florida / Flash Flood Watches in 2018

Flash Flood Watch 1, NWS Tallahassee, FL

May 26, 201813 counties in Florida; 13 counties in Georgia; 5 counties in Alabama

NWS Tallahassee, FL issued this flash flood watch at May 26, 2018, 3:16 PM CDT for 13 counties in Florida; 13 counties in Georgia; 5 counties in Alabama. It took effect at May 27, 2018, 4:00 AM CDT. It was in force for 58 hr.

The area

The counties it named.

The facts

Issued: May 26, 2018, 3:16 PM CDT (20:16 UTC)
In effect from: May 27, 2018, 4:00 AM CDT
Expired: May 29, 2018, 1:41 PM CDT
In force: 58 hr
Issued by: NWS Tallahassee, FL
Flood severity: None

All 31 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA

The radar

The Ft Rucker radar (KEOX), 76 km from the middle of the area, began a volume at 20:17 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 270 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 433 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 47 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 flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tallahassee, FL wrote its last area forecast discussion before this flash flood watch went out at May 26, 3:05 PM CDT, 11 minutes earlier.

Area forecast discussion, May 26, 3:05 PM CDT, 11 minutes before

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In the hours before

Special weather statement, May 26, 1:54 PM CDT, 1 hour 22 minutes before

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Special weather statement, May 26, 2:00 PM CDT, 1 hour 16 minutes before

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Special weather statement, May 26, 2:39 PM CDT, 37 minutes before

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The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 5:06 AM CDT	Small Craft Advisory	TAE		5 hr
May 26, 11:45 AM CDT	High Surf Advisory	TAE	Bay, Franklin, Gulf, Walton	31 hr
May 26, 1:54 PM CDT	Special Weather Statement	TAE	Walton	51 min
May 26, 2:00 PM CDT	Special Weather Statement	TAE	Washington	45 min
May 26, 2:39 PM CDT	Special Weather Statement	TAE	Washington	36 min
May 26, 4:00 PM CDT	Tropical Storm Warning	TAE	Bay, Calhoun, Dixie, Franklin, Gulf, Holmes and 6 more	54 hr

Nearby

Flash Flood Watches in Florida, 2018 Flash Flood Watches in Georgia, 2018 Flash Flood Watches in Alabama, 2018 Every flash flood 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.