Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 9, NWS Mobile, AL

February 21, 2014Escambia County, Santa Rosa County, Florida; Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 21, 2014, 2:34 AM CST for Escambia County, Santa Rosa County, Florida; Baldwin County, Alabama. It was in force for 56 min. 4 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: Feb 21, 2014, 2:34 AM CST (08:34 UTC)
Expired: Feb 21, 2014, 3:30 AM CST
In force: 56 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Baldwin County, AL, Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 82 km from the middle of the area, began a volume at 08:34 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
Feb 21, 2:39 AM CST	TSTM WND GST 50	Loxley, AL	UNIVERSITY OF SOUTH ALABAMA MESONET SITE RECORDED A 50 MPH WIND GUST
Feb 21, 2:55 AM CST	TSTM WND DMG	2 Se Walnut Hill, FL	18 WHEELER FLIPPED ON ITS SIDE AND TOPS OF TREES SNAPPED NEAR HIGHWAY 97 AND TUNGOIL ROAD
Feb 21, 2:55 AM CST	TSTM WND DMG	2 Se Walnut Hill, FL	POWER LINES DOWN ACROSS HIGHWAY 97 NEAR TUNGOIL RD
Feb 21, 2:56 AM CST	TSTM WND DMG	2 Se Walnut Hill, FL	TREES DOWN ON POWER LINES ON MASON ROAD OFF OF HIGHWAY 97

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 21, 12:58 AM CST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.6 hours before the alert went out and 229 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: 1934 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

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

687 
WUUS54 KMOB 210834
SVRMOB
ALC003-FLC033-113-210930-
/O.NEW.KMOB.SV.W.0009.140221T0834Z-140221T0930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
234 AM CST FRI FEB 21 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  WESTERN SANTA ROSA COUNTY IN NORTHWEST FLORIDA...
  CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 330 AM CST

* AT 230 AM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE EXTENDING FROM
  5 MILES NORTHEAST OF BAY MINETTE TO 5 MILES NORTH OF LOXLEY TO 2
  MILES SOUTHEAST OF DAPHNE...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHITFIELD...          PINE LEVEL...         JAY...
  MOLINO...             GONZALEZ...           LOXLEY...

THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 42 AND
66.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM CST FRIDAY
MORNING FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3097 8701 3068 8709 3057 8722 3057 8787
      3069 8779 3097 8770
TIME...MOT...LOC 0834Z 270DEG 42KT 3093 8766 3069 8770
          3058 8783

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 1:48 AM CST	Areal Flood Advisory	MOB	Escambia	117 min
Feb 21, 3:01 AM CST	Tornado Warning	MOB	Escambia, Santa Rosa	44 min
Feb 21, 3:04 AM CST	Wind Advisory	MOB		6 hr
Feb 21, 3:24 AM CST	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	51 min
Feb 21, 3:37 AM CST	Areal Flood Advisory	MOB	Escambia, Okaloosa, Santa Rosa	113 min
Feb 21, 3:54 AM CST	Areal Flood Advisory	MOB	Escambia	2 hr
Feb 20, 7:51 PM CST	Marine Dense Fog Advisory	MOB		7 hr
Feb 20, 7:55 PM CST	Tornado Warning	MOB	Clarke, Washington	35 min
Feb 20, 8:27 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	63 min
Feb 20, 10:31 PM CST	Areal Flood Advisory	MOB	Choctaw	3 hr
Feb 20, 10:57 PM CST	Severe Thunderstorm Warning	MOB	Choctaw, Washington	78 min
Feb 21, 12:10 AM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	80 min
Feb 21, 12:34 AM CST	Areal Flood Advisory	MOB	Baldwin, Choctaw, Clarke, Mobile, Washington	116 min
Feb 21, 1:04 AM CST	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Wilcox	41 min
Feb 21, 1:52 AM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	53 min
Feb 21, 1:57 AM CST	Special Marine Warning	MOB		93 min
Feb 21, 2:46 AM CST	Areal Flood Advisory	MOB	Butler, Conecuh, Escambia, Monroe	119 min
Feb 21, 3:54 AM CST	Special Marine Warning	MOB		96 min
Feb 21, 4:30 AM CST	Special Marine Warning	MOB		90 min
Feb 21, 4:42 AM CST	Special Marine Warning	MOB		93 min
Feb 21, 5:25 AM CST	Special Marine Warning	MOB		95 min
Feb 21, 10:46 AM CST	River Flood Warning	MOB	Choctaw, Clarke, Washington	3 days

Nearby

Severe Thunderstorm Warnings in Florida, 2014 Severe Thunderstorm Warnings in Alabama, 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.