Alert archive / Florida / Flash Flood Warnings in 2017

Flash Flood Warning 17, NWS Jacksonville, FL

September 11, 20176 counties in Florida; Charlton County, Clinch County, Ware County, Georgia

NWS Jacksonville, FL issued this flash flood warning at Sep 11, 2017, 6:15 AM EDT for 6 counties in Florida; Charlton County, Clinch County, Ware County, Georgia. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 11, 2017, 6:15 AM EDT (10:15 UTC)
Expired: Sep 11, 2017, 9:15 AM EDT
In force: 3 hr
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Flood severity: None

Counties Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Union County, FL, Charlton County, GA, Clinch County, GA, Ware County, GA

The radar

The Jacksonville radar (KJAX), 51 km from the middle of the area, began a volume at 10:20 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.

What was reported inside it

Time	Report	Where	Remark
Sep 11, 7:30 AM EDT	FLASH FLOOD	1 Ese Lake City, FL	PICTURES OF FLASH FLOODING IN THE LAKE CITY AREA RELAYED VIA SOCIAL MEDIA.
Sep 11, 8:35 AM EDT	FLASH FLOOD	Macclenny, FL	NUMEROUS REPORTS OF FLASH FLOODING ACROSS MACCLENNY AND BAKER COUNTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 75 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 10.3 hours before the alert went out and 52 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: 270 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 319 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

703 
WGUS52 KJAX 111015
FFWJAX
FLC003-007-019-023-031-125-GAC049-065-299-111315-
/O.NEW.KJAX.FF.W.0017.170911T1015Z-170911T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jacksonville FL
615 AM EDT MON SEP 11 2017

The National Weather Service in Jacksonville has issued a

* Flash Flood Warning for...
  Northeastern Bradford County in northern Florida...
  Baker County in northeastern Florida...
  Union County in northern Florida...
  Northeastern Columbia County in northern Florida...
  Northwestern Clay County in northeastern Florida...
  Southwestern Duval County in northeastern Florida...
  Southeastern Ware County in southeastern Georgia...
  Southeastern Clinch County in southeastern Georgia...
  South central Charlton County in southeastern Georgia...

* Until 915 AM EDT

* At 614 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. 6 to 12 inches of rain has fallen. Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Lake City, Starke, Lake Butler, Raiford, Middleburg, Columbia,
  Taylor, Macclenny, Glen St. Mary and Palestine Community.

Additional rainfall amounts of 3 to 5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3059 8260 3059 8258 3067 8258 3086 8206
      3044 8203 3028 8205 3030 8202 3028 8202
      3027 8175 2986 8174 3007 8271

$$

HESS

1 follow-up statement

003 
WGUS72 KJAX 111308
FFSJAX

Flash Flood Statement
National Weather Service Jacksonville FL
908 AM EDT MON SEP 11 2017

FLC003-007-019-023-031-125-GAC049-065-299-111316-
/O.EXP.KJAX.FF.W.0017.000000T0000Z-170911T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradford FL-Baker FL-Union FL-Columbia FL-Clay FL-Duval FL-Ware GA-
Clinch GA-Charlton GA-
908 AM EDT MON SEP 11 2017

...THE FLASH FLOOD WARNING FOR NORTHEASTERN BRADFORD...BAKER...
UNION...NORTHEASTERN COLUMBIA...NORTHWESTERN CLAY...SOUTHWESTERN
DUVAL...SOUTHEASTERN WARE...SOUTHEASTERN CLINCH AND SOUTH CENTRAL
CHARLTON COUNTIES WILL EXPIRE AT 915 AM EDT...

The heavy rain has mainly ended, but current flooding will be slow 
to recede. A separate Flood Warning has been issued for continued 
flooding.

LAT...LON 3059 8260 3059 8258 3067 8258 3086 8206
      3044 8203 3028 8205 3030 8202 3028 8202
      3027 8175 2986 8174 3007 8271

$$

ARB

What forecasters said that day

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

NWS Jacksonville, FL wrote its last area forecast discussion before this flash flood warning went out at Sep 11, 3:57 AM EDT, 2 hours 18 minutes earlier.

Area forecast discussion, Sep 11, 3:57 AM EDT, 2 hours 18 minutes before

Area Forecast Discussion
National Weather Service Jacksonville FL
357 AM EDT Mon Sep 11 2017

...HURRICANE WARNING CONTINUES THIS MORNING...

.SHORT TERM...Today and tonight...Hurricane Irma at 07z was
centered over west central Fl just north of Tampa and moving to
the NNW. Rainbands over the area will continue the threat of
flooding rainfall and damaging winds...with isolated tornadoes
and a storm surge at the coast. As Irma moves faster to the nw
today conditions will slowly improve from south to north this
afternoon and evening. Strong winds early this morning will
decrease but still remain strong and gusty through the afternoon
as ne winds veer around to the south.

Tuesday through Wednesday...Irma will be well to the nw of the
area on Tuesday with drier air and lighter winds expected for ne
Fl/se Ga. With ample sun and sw winds temperatures will be at or a
few degrees above average Tue and Wed. A deep sw flow will
increase moisture across the area on Wednesday with scattered
afternoon/evening showers and storms expected.

.LONG TERM...Thursday through Sunday...A moist sw flow will
prevail this period. Expect scattered diurnal storms each day with
a few strong storms possbile on Thursday due to moderate speed
shear in the vertical wind profile. Winds and shear will decrease
after Thursday. Temperatures will be a little above average
through the period. Extended range models show Hurricane Jose in
the Atlantic meandering and doing a loop while staying east of
the se U.S coast.

&&

.AVIATION...IFR/LIFR conditions will continue this morning as
rainbands from Hurricane Irma affect ne Fl/se Ga TAF sites.
Improving conditions expected to spread from south to north this
afternoon. Strong ne winds will veer to the south by early
afternoon with gusts to near 40 knots continuing through the
afternoon hours along with MVFR cigs.

&&

.MARINE...Hurricane warning continues for the waters as Irma
continues to produce extremely hazardous conditions. Effects from
Irma will start to subside late today but seas will be slower to
fall and stay elevated due to swells. Northeast winds this morning
will become southerly by this afternoon. Winds and seas look
relatively benign Wednesday through Friday with the possibility
that the track of Hurricane Jose may affect the waters with at
least swells by the end of the week.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  79  66  83  67 / 100  30  10  10
SSI  84  74  86  73 / 100  30  10  10
JAX  84  71  87  71 / 100  20  10  10
SGJ  87  72  87  72 /  90  20  10  10
GNV  83  70  87  70 /  90  30  20  10
OCF  82  72  87  71 /  90  30  20  10

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...Flash Flood Watch through this evening for Alachua-Baker-
     Bradford-Clay-Coastal Duval-Coastal Nassau-Columbia-Flagler-
     Gilchrist-Hamilton-Inland Duval-Inland Nassau-Marion-Putnam-
     St. Johns-Suwannee-Union.

     Hurricane Warning for Alachua-Baker-Bradford-Clay-Coastal Duval-
     Coastal Nassau-Columbia-Flagler-Gilchrist-Hamilton-Inland
     Duval-Inland Nassau-Marion-Putnam-St. Johns-Suwannee-Union.

GA...Flash Flood Watch through this evening for Appling-Atkinson-
     Bacon-Brantley-Charlton-Clinch-Coastal Camden-Coastal Glynn-
     Coffee-Echols-Inland Camden-Inland Glynn-Jeff Davis-Pierce-
     Ware-Wayne.

     Tropical Storm Warning for Appling-Bacon-Brantley-Charlton-
     Coastal Camden-Coastal Glynn-Coffee-Inland Camden-Inland
     Glynn-Jeff Davis-Pierce-Ware-Wayne.

     Hurricane Watch for Coastal Camden-Coastal Glynn-Inland Camden-
     Inland Glynn.

     Hurricane Warning for Atkinson-Clinch-Echols.

AM...Hurricane Warning for Coastal waters from Altamaha Sound to
     Fernandina Beach FL out 20 NM-Coastal waters from
     Fernandina Beach to St. Augustine FL out 20 NM-Coastal
     waters from St. Augustine to Flagler Beach FL out 20 NM-
     Waters from Altamaha Sound GA to Fernandina Beach FL from
     20 to 60 NM-Waters from Fernandina Beach to St. Augustine
     FL from 20 to 60 NM-Waters from St. Augustine to Flagler
     Beach FL from 20 to 60 NM.

&&

Zibura/Kennedy/Shashy

In the hours before

Local storm report, Sep 11, 5:45 AM EDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
545 AM EDT MON SEP 11 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 AM     STORM SURGE      4 NNW MANDARIN          30.20N 81.66W
09/11/2017  U0.00 FT         Duval              FL   OTHER FEDERAL

            THE ST JOHNS RIVER AT MAIN STREET BRIDGE REPORTED A WATER
            LEVEL OF 4.39 FEET NAVD88. THIS BREAKS THE RECORD FROM
            HURRICANE DORA IN 1964 OF 4.12 FEET NAVD88.

&&

AK

Local storm report, Sep 11, 5:53 AM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
553 AM EDT MON SEP 11 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 AM     STORM SURGE      1 SSE BRUNSWICK         31.14N 81.48W
09/11/2017                   GLYNN              GA   BROADCAST MEDIA

            WATER UP TO CAR DOORS ON US-17 IN BRUNSWICK.

&&

NM

Special weather statement, Sep 11, 5:59 AM EDT, 16 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
559 AM EDT Mon Sep 11 2017

FLZ025-125-111600-
Inland Duval-Coastal Duval-
Including the cities of Normandy, Ortega, Riverside, San Marco,
Arlington, Jacksonville, Oceanway, and Tallyrand
559 AM EDT Mon Sep 11 2017

The storm tide at the Main Street Bridge has exceeded Hurricane
Dora. When the wind switches to the south, the St. Johns River
water will push north into downtown and we may see Category 2
flooding in that area due to the high astronomical tides and
trapped tide in the river. That water may rise to 4 to 5 feet
above ground level in Landing Park in San Marco and the South
Hampton areas. Residents should evacuate vertically to the second
floor rather than try to move through rising flood waters.

Local storm report, Sep 11, 6:00 AM EDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
600 AM EDT MON SEP 11 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1253 AM     FLASH FLOOD      1 E NORMANDY            30.31N 81.74W
09/11/2017                   DUVAL              FL   PUBLIC

            SOCIAL MEDIA POST SHOWING WATER IN HOME NEAR
            ELLIS RD IN MURRY HILL.

&&

NM

Local storm report, Sep 11, 6:02 AM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
602 AM EDT MON SEP 11 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0555 AM     STORM SURGE      1 SSW JACKSONVILLE BEAC 30.26N 81.41W
09/11/2017                   DUVAL              FL   PUBLIC

            SOCIAL MEDIA POST REPORTING WATER IN
            SANCTUARY NEIGHBORHOOD.

&&

NM

Local storm report, Sep 11, 6:07 AM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
607 AM EDT MON SEP 11 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0446 AM     FLASH FLOOD      1 N JACKSONVILLE BEACH  30.29N 81.39W
09/11/2017                   DUVAL              FL   BROADCAST MEDIA

            SOCIAL MEDIA POST REPORTING WATER ON 3RD
            STREET NEAR PITA PIT WITH ADDITIONAL WATER
            ON 5TH STREET.

&&

NM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 10, 8:06 PM EDT	Areal Flood Warning	JAX	Duval, Nassau, Saint Johns	3 hr
Sep 10, 8:09 PM EDT	Areal Flood Warning	JAX	Clay, Duval, Flagler, Putnam, Saint Johns	3 hr
Sep 10, 8:10 PM EDT	Tornado Warning	JAX	Flagler, Saint Johns	35 min
Sep 10, 8:38 PM EDT	Areal Flood Warning	JAX	Alachua, Baker, Bradford, Clay, Duval, Putnam and 2 more	3 hr
Sep 10, 8:44 PM EDT	Areal Flood Warning	JAX	Duval, Nassau	3 hr
Sep 10, 10:23 PM EDT	Flash Flood Warning	JAX	Duval, Nassau	3 hr
Sep 10, 10:56 PM EDT	Areal Flood Warning	JAX	Clay, Duval, Nassau, Saint Johns	6 hr
Sep 11, 12:26 AM EDT	Areal Flood Warning	JAX	Alachua, Bradford, Clay, Flagler, Marion, Putnam and 1 more	3 hr
Sep 11, 12:38 AM EDT	Areal Flood Warning	JAX	Nassau	6 hr
Sep 11, 12:49 AM EDT	Flash Flood Warning	JAX	Flagler, Marion, Putnam, Saint Johns	5 hr
Sep 11, 1:35 AM EDT	Flash Flood Warning	JAX	Clay, Flagler, Putnam, Saint Johns	3 hr
Sep 11, 2:02 AM EDT	Tornado Warning	JAX	Nassau	28 min
Sep 11, 2:10 AM EDT	Flash Flood Warning	JAX	Clay, Saint Johns	3 hr
Sep 11, 2:31 AM EDT	Flash Flood Warning	JAX	Clay, Duval, Nassau, Saint Johns	3 hr
Sep 11, 2:34 AM EDT	Tornado Warning	JAX	Nassau	6 min
Sep 11, 2:41 AM EDT	Flash Flood Warning	JAX	Clay, Duval, Saint Johns	3 hr
Sep 11, 3:36 AM EDT	Tornado Warning	JAX	Duval	24 min
Sep 11, 4:10 AM EDT	Flash Flood Warning	JAX	Duval, Nassau	3 hr
Sep 11, 4:22 AM EDT	Areal Flood Advisory	JAX	Marion	3 hr
Sep 11, 4:38 AM EDT	Areal Flood Advisory	JAX	Alachua, Bradford, Clay, Putnam	3 hr
Sep 11, 5:08 AM EDT	Areal Flood Warning	JAX	Alachua, Baker, Bradford, Columbia, Gilchrist, Union	3 hr
Sep 11, 5:14 AM EDT	Flash Flood Warning	JAX	Nassau	3 hr
Sep 11, 5:34 AM EDT	Flash Flood Warning	JAX	Clay, Duval, Nassau, Saint Johns	3 hr
Sep 11, 6:37 AM EDT	Areal Flood Warning	JAX	Columbia, Hamilton, Suwannee	3 hr
Sep 11, 6:45 AM EDT	Flash Flood Warning Emergency	JAX	Duval	6 hr
Sep 11, 8:23 AM EDT	Areal Flood Warning	JAX	Clay, Duval, Nassau, Saint Johns	3 hr
Sep 11, 9:06 AM EDT	Areal Flood Warning	JAX	Baker, Bradford, Clay, Columbia, Duval, Union	3 hr
Sep 11, 9:48 AM EDT	River Flood Warning	JAX	Columbia, Gilchrist, Suwannee	18 days
Sep 11, 12:19 PM EDT	Flash Flood Warning Emergency	JAX	Clay, Duval, Putnam, Saint Johns	6 hr
Sep 11, 5:11 PM EDT	Wind Advisory	JAX	Baker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more	5 hr
Sep 11, 5:18 PM EDT	Coastal Flood Warning	JAX	Duval, Flagler, Nassau	3 days
Sep 11, 5:18 PM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	27 hr
Sep 11, 5:18 PM EDT	High Surf Advisory	JAX	Duval, Flagler, Nassau	10 hr
Sep 11, 5:26 PM EDT	Small Craft Advisory	JAX		28 hr
Sep 10, 10:31 PM EDT	River Flood Warning	JAX	Appling, Tattnall, Toombs, Wayne	24 hr
Sep 11, 5:18 AM EDT	Tornado Warning	JAX	Camden	27 min
Sep 11, 6:41 AM EDT	Areal Flood Warning	JAX	Brantley, Charlton, Clinch, Pierce, Ware, Wayne	3 hr
Sep 11, 8:09 AM EDT	Flash Flood Warning	JAX	Brantley, Camden, Charlton, Glynn	111 min
Sep 11, 9:41 AM EDT	Flash Flood Warning	JAX	Charlton, Ware	2 hr
Sep 11, 9:46 AM EDT	Areal Flood Warning	JAX	Brantley, Charlton, Pierce, Ware, Wayne	3 hr
Sep 11, 9:56 AM EDT	Areal Flood Warning	JAX	Brantley, Camden, Charlton, Glynn	2 hr
Sep 11, 3:07 PM EDT	River Flood Warning	JAX	Brantley	16 days

Nearby

Flash Flood Warnings in Florida, 2017 Flash Flood Warnings in Georgia, 2017 Every flash flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.