Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Mobile, AL

April 27, 2015Baldwin County, Mobile County, Alabama; Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this special weather statement at Apr 27, 2015, 3:10 PM CDT for Baldwin County, Mobile County, Alabama; Escambia County, Santa Rosa County, Florida. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 27, 2015, 3:10 PM CDT (20:10 UTC)
Expired
Apr 27, 2015, 4:00 PM CDT
In force
50 min
Issued by
NWS Mobile, AL

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

The radar

The Mobile radar (KMOB), 67 km from the middle of the area, began a volume at 20:11 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.2 hours before the alert went out and 201 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2015-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 757 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2015-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
757 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
853 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
274 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

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

NWS Mobile, AL wrote its last area forecast discussion before this special weather statement went out at Apr 27, 3:08 PM CDT, 2 minutes earlier.

Area forecast discussion, Apr 27, 3:08 PM CDT, 2 minutes before
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Hazardous weather outlook, Apr 27, 7:35 AM CDT, 7 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOBILE AL
735 AM CDT MON APR 27 2015

ALZ051>064-FLZ001>006-MSZ067-075-076-078-079-281245-
CHOCTAW-WASHINGTON-CLARKE-WILCOX-MONROE-CONECUH-BUTLER-CRENSHAW-
ESCAMBIA-COVINGTON-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE-
LOWER BALDWIN-INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA-
COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-WAYNE-PERRY-
GREENE-STONE-GEORGE-
735 AM CDT MON APR 27 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ALABAMA...SOUTHWEST ALABAMA...NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

.DAY ONE...TODAY AND TONIGHT

A FEW THUNDERSTORMS WILL DAMPEN AREA COASTAL WATERS...WITH A
WATERSPOUT OR TWO POSSIBLE.

SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE AND STRENGTHEN
LATER TODAY INTO TONIGHT. DAMAGING WINDS...AND LARGE HAIL ARE THE
PRIMARY THREATS...MAINLY OVER COASTAL AREAS. ALSO...WITH A BOUNDARY
STALLED ALONG THE COAST...TRAINING THUNDERSTORMS MAY CAUSE FLOODING
TO AREA COASTAL COUNTIES LATER TODAY INTO TUESDAY.

THERE IS A MODERATE RISK OF RIP CURRENTS ALONG AREA BEACHES TODAY
THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
SHOWERS AND THUNDERSTORMS WILL BE ONGOING. A WARM FRONT IS EXPECTED
TO MOVE INLAND DURING THE DAY...SPREADING THE RISK OF SEVERE WEAKER
OVER THE SOUTHERN THIRD OF THE AREA. DAMAGING WINDS...LARGE HAIL AND
A TORNADO REMAIN POSSIBLE. ALSO...TRAINING THUNDERSTORMS IN THE
MORNING MAY CONTINUE TO CREATE LOCALIZED FLOODING CONDITIONS.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME WEDNESDAY THROUGH
SUNDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF SKYWARN SEVERE STORM SPOTTER NETWORKS IS NOT
EXPECTED THROUGH SUNDAY.

GMZ630>635-650-655-670-675-281245-
NORTHERN MOBILE BAY-SOUTHERN MOBILE BAY-MISSISSIPPI SOUND-
PERDIDO BAY-PENSACOLA BAY SYSTEM-CHOCTAWHATCHEE BAY-
COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA MS OUT 20 NM-
COASTAL WATERS FROM DESTIN TO PENSACOLA FL OUT 20 NM-
WATERS FROM PENSACOLA FL TO PASCAGOULA MS FROM 20 TO 60 NM-
WATERS FROM DESTIN TO PENSACOLA FL FROM 20 TO 60 NM-
735 AM CDT MON APR 27 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE COASTAL
WATERS OF ALABAMA AND NORTHWEST FLORIDA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO BECOME MORE NUMEROUS LATER TODAY
THROUGH TONIGHT. WATERSPOUTS ARE POSSIBLE THIS MORNING...WITH
STRONG THUNDERSTORMS WINDS AND LOCALIZED REDUCTION IN VISIBILITIES IN
VERY HEAVY RAINS LATER TODAY THROUGH TONIGHT. ALSO...MODERATE EAST TO
SOUTHEAST WINDS TONIGHT WILL CREATE HAZARDOUS CONDITIONS FOR SMALL
CRAFT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SHOWERS AND THUNDERSTORMS WILL END LATE TUESDAY. LOCALLY STRONG
WINDS AND REDUCED VISIBILITIES IN VERY HEAVY RAINS CONTINUE...BUT
GRADUALLY TAPER OFF THROUGH THE DAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME WEDNESDAY THROUGH
SUNDAY.

In the hours before

Special weather statement, Apr 27, 3:10 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 4:28 AM CDTFlash Flood WatchMOB24 hr
Apr 27, 9:48 AM CDTSpecial Marine WarningMOB87 min
Apr 27, 10:42 AM CDTSpecial Marine WarningMOB93 min
Apr 27, 1:01 PM CDTSpecial Marine WarningMOB89 min
Apr 27, 3:10 PM CDTSpecial Marine WarningMOB80 min
Apr 27, 3:16 PM CDTSpecial Marine WarningMOB89 min
Apr 27, 3:26 PM CDTSpecial Marine WarningMOB2 hr

Nearby

Special Weather Statements in Alabama, 2015Special Weather Statements in Florida, 2015Every special weather statement in 2015

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.