Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 67, NWS Tallahassee, FL

April 30, 2014Bay County, Gulf County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 30, 2014, 8:20 AM CDT for Bay County, Gulf County, Florida. It was in force for 40 min. 1 report 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: Apr 30, 2014, 8:20 AM CDT (13:20 UTC)
Expired: Apr 30, 2014, 9:00 AM CDT
In force: 40 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Bay County, FL, Gulf County, FL

The radar

The Eglin Afb radar (KEVX), 96 km from the middle of the area, began a volume at 13:24 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
Apr 30, 9:00 AM CDT	TSTM WND DMG	2 Ssw Stonemill Creek, FL	TREE DOWN ACROSS POWER LINES AND BLOCKING LAKE GROVE ROAD.

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 one storm report to this severe thunderstorm warning; the first came 40 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 30, 12:45 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 1.3 hours before the alert went out and 348 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: 1400 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 794 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

240 
WUUS52 KTAE 301320
SVRTAE
FLC005-045-301400-
/O.NEW.KTAE.SV.W.0067.140430T1320Z-140430T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
820 AM CDT WED APR 30 2014

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BAY COUNTY IN THE PANHANDLE OF FLORIDA...
  THIS INCLUDES THE CITIES OF...PANAMA CITY...CALLAWAY...
  GULF COUNTY IN THE PANHANDLE OF FLORIDA...
  THIS INCLUDES THE CITY OF PORT ST. JOE...

* UNTIL 900 AM CDT/1000 AM EDT/

* AT 815 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 8 MILES SOUTHWEST OF PANAMA CITY TO 
  32 MILES SOUTHWEST OF MEXICO BEACH TO 48 MILES SOUTHWEST OF 
  PORT ST. JOE...AND MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HILAND PARK AND SPRINGFIELD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE IMMEDIATELY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS UNTIL
THIS STORM PASSES.

&&

LAT...LON 2982 8543 2988 8540 2969 8535 2981 8531
      2990 8537 3017 8581 3031 8539 3020 8539
      3020 8512 3009 8515 3003 8513 2998 8503
      2991 8501 2993 8504 2989 8505 2981 8502
      2978 8511 2967 8523 2967 8533 2965 8535
TIME...MOT...LOC 1318Z 269DEG 39KT 3011 8573 2996 8568
          2981 8568 2963 8576 2942 8593

$$

9-FOURNIER

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 30, 7:13 AM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, Apr 30, 7:13 AM CDT, 1 hour 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
813 AM EDT Wed Apr 30 2014

.Near Term [Through Today]...

HEAVIEST RAINFALL FOR REMAINDER OF TODAY LOOKS TO BE SOUTH OF
INTERSTATE 10 IN THE FLORIDA PANHANDLE WHERE SIGNIFICANT RAINFALL
AND FLOODING OCCURRED OVERNIGHT...PARTICULARLY IN WALTON AND BAY
COUNTIES. WILL BE WATCHING THE COASTAL COUNTIES AND SLIGHTLY
INLAND FROM FRANKLIN COUNTY WESTWARD FOR THE MAIN SEVERE WEATHER
THREAT REST OF TODAY WITH MINIMAL CHANCES ELSEWHERE. EXPECT
PERIODS OF HEAVY RAINFALL MOST AREAS THIS AFTERNOON WITH RAIN
DIMINISHING IN SOUTHEAST ALABAMA COUNTIES MID AFTERNOON TO EARLY
EVENING.

&&

.Aviation...
[Through 12Z Thursday]...
THERE WILL BE WIDESPREAD MVFR/IFR CONDITIONS IN RAIN AND
SCATTERED THUNDERSTORMS ALL TERMINALS THROUGH 00Z. RAIN AND
THUNDERSTORMS WILL GRADUALLY DIMINISH AT ALL TERMINALS BETWEEN 00Z
AND 06Z EXCEPT AT KVLD WHERE SCATTERED CONVECTION WILL CONTINUE
THROUGH 12Z. IN THE WAKE OF PRECIPITATION EXPECT IFR/MVFR CIGS
WITH VSBY AOA 6SM.

&&

.Prev Discussion [417 AM EDT]...

.Short Term [Tonight Through Thursday Night]...
The closed mid-upper level slow moving low will finally eject to the
northeast and across the Great Lakes region on Thursday. Even so,
the local area will remain under deep southwest flow. The associated
surface cold front will move into our Ern zones tonight and slowly
push ESE of our CWFA on Thurs. Until then...rain chances will
continue and with saturated grounds..there will be an accompanying
flash flooding threat which is detailed below in the hydrology
section. Will go with 30-60% SW-NE POP gradient tonight...30-50%
NW-SE POP gradient on Thurs and 20-60% Thurs night

.Long Term [Friday Through Tuesday]...
The stubborn surface low that has been stuck over the CONUS for
the past few days finally begins to lift into eastern Canada by
Friday. The associated trailing cold front will finally push
through our area for good bringing with it the chance for showers
on Friday afternoon. Behind the front ridging will settle in
place. Rain chances will be minimal and southerly flow at the end
of the period will bring sticky conditions with high temperatures
in the upper 80s and dewpoints near 60.

.Marine...
Strong and gusty onshore winds over the Panhandle waters justified a
Small Craft Advisory which should end soon after sunrise. Exercise
caution level winds are expected into this morning. After the
cold front passes thru this evening, offshore winds will prevail
through the weekend until high pressure builds in the Gulf on
Sunday switching our prevailing winds out of the east.

.Fire Weather...
No fire weather concerns.

.Hydrology...
Rainfall totals so far for this event are around 2 to 4 inches
across our area with higher totals around 5 to 7 inches in the
Florida Panhandle. Through the rest of the predawn hours, the
Panhandle, SE Alabama, and SW Georgia may see another 3-5 inches
of rainfall, with noticeably lower accumulations possible in the
Big Bend and in south central Georgia. With rain continuing thru
today, flash flooding will be possible.

Flooding continues on the Suwannee River in the eastern Big Bend,
but most other rivers have receded since our previous rainfall
event. However, rainfall totals will be sufficient to bring many
rivers into minor flood stage once again and many rivers have
already begun rising again. There is uncertainty about how much the
rivers will rise, since much of the rain hasn't fallen yet.

The most up-to-date river forecast information can always be found
on our AHPS page (below).

http:/water.weather.gov/ahps2/index.php?wfo=tae.

&&

.Preliminary Point Temps/PoPs...

Tallahassee   84  67  80  58  75 /  60  40  50  50  70
Panama City   78  63  76  59  70 /  70  40  40  50  60
Dothan        79  60  76  54  74 /  70  40  30  30  30
Albany        82  63  77  56  75 /  70  50  40  30  40
Valdosta      87  67  80  58  73 /  50  40  50  50  60
Cross City    85  69  82  63  75 /  40  30  50  60  70
Apalachicola  78  66  75  59  70 /  60  30  50  60  70

&&

.TAE Watches/Warnings/Advisories...

FL...Flash Flood Watch through this evening for Calhoun-Central
     Walton-Coastal Bay-Coastal Franklin-Coastal Gulf-Coastal
     Wakulla-Gadsden-Holmes-Inland Bay-Inland Franklin-Inland
     Gulf-Inland Wakulla-Inland Walton-Jackson-Leon-Liberty-
     South Walton-Washington.

     High Rip Current Risk through this evening for Coastal Bay-
     Coastal Franklin-Coastal Gulf-South Walton.

GA...Flash Flood Watch through this evening for Baker-Ben Hill-
     Calhoun-Clay-Colquitt-Decatur-Dougherty-Early-Grady-Irwin-
     Lee-Miller-Mitchell-Quitman-Randolph-Seminole-Terrell-
     Thomas-Tift-Turner-Worth.

AL...Flash Flood Watch through this evening for Coffee-Dale-Geneva-
     Henry-Houston.

GM...Small Craft Advisory until 8 AM EDT this morning for Coastal
     waters from Apalachicola to Destin FL out 20 NM-Waters from
     Apalachicola to Destin FL from 20 to 60 NM.

&&

NEAR TERM...HOLLINGSWORTH
SHORT TERM...BLOCK
LONG TERM...BARRY
AVIATION...HOLLINGSWORTH
MARINE...BLOCK
FIRE WEATHER...HOLLINGSWORTH
HYDROLOGY...BLOCK

In the hours before

Local storm report, Apr 30, 5:06 AM CDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
606 AM EDT WED APR 30 2014

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

0605 AM     FLASH FLOOD      MARIANNA                30.77N 85.24W
04/30/2014                   JACKSON            FL   EMERGENCY MNGR

            APPROXIMATELY 64 ROADS CLOSED OR UNDER WATER ACROSS
            JACKSON COUNTY DUE TO HEAVY RAIN AND FLASH FLOODING.

&&

08-LAMERS

Local storm report, Apr 30, 5:34 AM CDT, 2 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
634 AM EDT WED APR 30 2014

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

0630 AM     FLASH FLOOD      SANTA ROSA BEACH        30.39N 86.23W
04/30/2014                   WALTON             FL   911 CALL CENTER

            DANGEROUS FLASH FLOODING REPORTED. RISING WATERS
            APPROACHING SOME HOMES OR ENTERING SOME HOMES. ON SPOTTED
            DOLPHIN DRIVE...ALL HOMES WERE TAKING ON WATER. STRANDED
            AND STALLED VEHICLES WERE ALSO REPORTED IN FLOOD WATERS.
            WORST OF THE FLOODING REPORTED FROM THE BEACH COMMUNITIES
            OF SOUTHERN WALTON COUNTY.

&&

08-LAMERS

Local storm report, Apr 30, 5:35 AM CDT, 2 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
635 AM EDT WED APR 30 2014

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

0630 AM     FLASH FLOOD      VERNON                  30.62N 85.71W
04/30/2014                   WASHINGTON         FL   911 CALL CENTER

            MULTIPLE ROADS FLOODED...IMPASSABLE...OR CLOSED ACROSS
            WASHINGTON COUNTY.

&&

08-LAMERS

Local storm report, Apr 30, 6:05 AM CDT, 2 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
705 AM EDT WED APR 30 2014

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

0703 AM     FLASH FLOOD      PANAMA CITY AIRPORT     30.34N 85.80W
04/30/2014                   BAY                FL   911 CALL CENTER

            HARRISON AT 14TH STREET AND WILSON AT 12TH STREET
            INTERSECTIONS ARE FLOODED.

&&

WESTON

Local storm report, Apr 30, 6:06 AM CDT, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
706 AM EDT WED APR 30 2014

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

0630 AM     FLASH FLOOD      1 S BENNETT             30.37N 85.53W
04/30/2014                   BAY                FL   NEWSPAPER

            MULTIPLE ROADS CLOSED INCLUDING CLEAR CREEK ROAD FROM
            TIMBER RUN ROAD TO ANN ELIZABETH LANE AND OAK TREE LANE.
            ONE STRETCH OF ROAD HAD A THREE FOOT WASHOUT.

&&

08-LAMERS

Local storm report, Apr 30, 6:39 AM CDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
739 AM EDT WED APR 30 2014

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

0703 AM     FLASH FLOOD      PANAMA CITY AIRPORT     30.34N 85.80W
04/30/2014                   BAY                FL   BROADCAST MEDIA

            US HIGHWAY 98 IMPASSABLE DUE TO HIGH WATER.

&&

WESTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 8:27 PM CDT	River Flood Warning	TAE	Wakulla	7 days
Apr 29, 10:19 PM CDT	Special Weather Statement	TAE	Walton	56 min
Apr 29, 10:33 PM CDT	Severe Thunderstorm Warning	TAE	Walton	57 min
Apr 29, 10:56 PM CDT	Flash Flood Warning	TAE	Walton	9 hr
Apr 29, 11:01 PM CDT	Severe Thunderstorm Warning	TAE	Walton	44 min
Apr 29, 11:20 PM CDT	River Flood Warning	TAE	Walton	49 hr
Apr 29, 11:42 PM CDT	Severe Thunderstorm Warning	TAE	Walton	63 min
Apr 30, 12:04 AM CDT	Special Marine Warning	TAE		116 min
Apr 30, 12:15 AM CDT	Flash Flood Warning Emergency	TAE	Walton	14 hr
Apr 30, 12:17 AM CDT	Severe Thunderstorm Warning	TAE	Holmes, Walton	58 min
Apr 30, 12:31 AM CDT	Tornado Warning	TAE	Walton	29 min
Apr 30, 12:35 AM CDT	Flash Flood Warning	TAE	Holmes	6 hr
Apr 30, 12:46 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	44 min
Apr 30, 12:47 AM CDT	Tornado Warning	TAE	Walton, Washington	28 min
Apr 30, 12:56 AM CDT	Special Marine Warning	TAE		94 min
Apr 30, 1:04 AM CDT	Severe Thunderstorm Warning	TAE	Holmes, Jackson, Walton	41 min
Apr 30, 1:15 AM CDT	Flash Flood Warning	TAE	Holmes, Jackson, Washington	6 hr
Apr 30, 1:27 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Jackson, Washington	63 min
Apr 30, 1:45 AM CDT	Tornado Warning	TAE	Jackson	30 min
Apr 30, 1:53 AM CDT	Tornado Warning	TAE	Jackson	37 min
Apr 30, 1:57 AM CDT	Flash Flood Warning	TAE	Jackson	6 hr
Apr 30, 2:06 AM CDT	Flash Flood Warning	TAE	Bay	9 hr
Apr 30, 2:26 AM CDT	Severe Thunderstorm Warning	TAE	Jackson	64 min
Apr 30, 2:29 AM CDT	Tornado Warning	TAE	Jackson	31 min
Apr 30, 2:31 AM CDT	Severe Thunderstorm Warning	TAE	Calhoun	44 min
Apr 30, 3:03 AM CDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Jackson, Liberty	57 min
Apr 30, 3:08 AM CDT	Flash Flood Warning	TAE	Calhoun	9 hr
Apr 30, 3:30 AM CDT	Special Marine Warning	TAE		90 min
Apr 30, 3:35 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Walton	40 min
Apr 30, 3:41 AM CDT	Severe Thunderstorm Warning	TAE	Gadsden	64 min
Apr 30, 3:58 AM CDT	Flash Flood Warning	TAE	Gadsden, Liberty	6 hr
Apr 30, 5:02 AM CDT	Flash Flood Warning	TAE	Bay, Calhoun	6 hr
Apr 30, 5:18 AM CDT	Special Marine Warning	TAE		87 min
Apr 30, 6:21 AM CDT	Special Marine Warning	TAE		114 min
Apr 30, 6:45 AM CDT	Special Marine Warning	TAE		60 min
Apr 30, 8:27 AM CDT	Special Marine Warning	TAE		2 hr
Apr 30, 8:32 AM CDT	Areal Flood Warning	TAE	Jackson	3 hr
Apr 30, 8:46 AM CDT	Areal Flood Warning	TAE	Washington	3 hr
Apr 30, 8:55 AM CDT	River Flood Warning	TAE	Jackson	3 days
Apr 30, 8:55 AM CDT	River Flood Warning	TAE	Calhoun	8 days
Apr 30, 8:56 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Franklin, Gulf	34 min
Apr 30, 11:01 AM CDT	Flash Flood Warning	TAE	Bay, Gulf	4 hr
Apr 30, 11:21 AM CDT	Flash Flood Warning	TAE	Jackson, Washington	4 hr
Apr 30, 11:48 AM CDT	Flash Flood Warning	TAE	Calhoun	3 hr
Apr 30, 12:05 PM CDT	Wind Advisory	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 6 more	5 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2014 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.