Alert archive / Alabama / Hard Freeze Warnings in 2008

Hard Freeze Warning 5, NWS Mobile, AL

November 21, 200810 counties in Alabama; 5 counties in Mississippi

NWS Mobile, AL issued this hard freeze warning at Nov 21, 2008, 1:29 PM CST for 10 counties in Alabama; 5 counties in Mississippi. It took effect at Nov 22, 2008, 12:00 AM CST. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 21, 2008, 1:29 PM CST (19:29 UTC)
In effect from: Nov 22, 2008, 12:00 AM CST
Expired: Nov 22, 2008, 7:00 AM CST
In force: 7 hr
Issued by: NWS Mobile, AL

Counties Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 96 km from the middle of the area, began a volume at 19:27 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

Birmingham, AL (KBMX), launched 12:00Z, 7.5 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1536 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: -193 m²/s²
0-3 km storm-relative helicity: -154 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 hard freeze warning 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 hard freeze warning went out at Nov 20, 3:50 PM CST, 21 hours 39 minutes earlier.

Area forecast discussion, Nov 20, 3:50 PM CST, 21 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOBILE AL
350 PM CST THU NOV 20 2008

.SHORT TERM TONIGHT THROUGH SATURDAY NIGHT...A FEW CLOUDS WILL
ACCOMPANY A COLD FRONT THAT WILL MOVE ACROSS THE FORECAST AREA EARLY
THIS EVENING. LOWS TONIGHT WILL FALL INTO THE MID 20S TO UPPER 20S
INLAND AND THE LOWER 30S ALONG THE COAST. COOLER HIGH TEMPS WILL
OCCUR ON SATURDAY WITH READINGS ONLY IN THE LOWER TO MID 50S. VERY
COLD TEMPERATURES EXPECTED FRIDAY NIGHT UNDER CLEAR SKIES AND
DIMINISHING WINDS...WITH LOWS IN THE LOWER TO MIDDLE 20S INLAND
AREAS...WITH UPPER 20S TO LOWER 30S ALONG THE COASTAL ZONES. A HARD
FREEZE WATCH IS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY
MORNING FOR THE INLAND AREAS. A COOL DRY AIR MASS WILL PERSIST
THROUGH SATURDAY NIGHT. /22

.LONG TERM SUNDAY THROUGH THURSDAY...SURFACE HIGH WILL MOVE OFF
THE EAST COAST BY SUNDAY...WITH RETURN TO SEASONAL TEMPS THROUGH
TUESDAY. GULF OPENS UP AT THAT TIME INCREASING CHANCES OF RAIN
MONDAY AFTERNOON INTO EARLY TUESDAY MORNING AS A FRONT APPROACHES.
GFS IS DOWNPLAYING SURFACE CYCLOGENESIS OVER THE GULF AND INSTEAD
DEVELOPING THE APPROACHING A COLD FRONT AS PART OF A LOW SOUTH OF
THE GREAT LAKES. THIS IS MORE CONGRUENT WITH THE ECMWF WHICH HAS NOT
HERALDED GULF CYCLOGENESIS. ANOTHER HIGH PRESSURE WILL MOVE IN
BEHIND THE FRONT FOLLOWED BY MORE DRY WEATHER. /77

&&

.MARINE...A COLD FRONT WILL MOVE SOUTH ACROSS THE COASTAL WATERS
LATE TONIGHT...WITH A STRONG NORTHERLY WIND...AND RESULTANT BUILDING
SEAS DEVELOPING. STRONG WINDS WILL PERSIST...BUT BECOME MORE
EASTERLY THROUGH FRIDAY NIGHT. AS A RESULT...A SMALL CRAFT ADVISORY
WILL BE IN EFFECT FROM MIDNIGHT TONIGHT UNTIL 6AM SATURDAY MORNING.
BY MID MORNING SATURDAY...THE EASTERLY WINDS WILL WEAKEN AS HIGH
PRESSURE MOVES OFF THE SOUTHEAST ATLANTIC COAST...THEN A LIGHT TO
MODERATE EAST TO SOUTHEAST WINDFLOW WILL PREVAIL INTO THE EARLY PART
OF NEXT WEEK. 12/DS

&&

.FIRE WEATHER...ANOTHER DRY COLD FRONT WILL PASS THROUGH THE REGION
LATE THIS EVENING. A HIGH BEHIND THAT FRONT WILL POUR DRY AIR INTO
THE REGION..AND LOWERING RELATIVE HUMIDITY BELOW RED FLAG WARNING
CRITERIA FOR ALABAMA AND WESTERN FLORIDA. THIS WILL ELEVATE THE RISK
OF EXPLOSIVE FIRE GROWTH IN THE REGION. RED FLAG WARNINGS HAVE BEEN
ISSUED FOR BOTH FRIDAY AND SATURDAY ACROSS THE WESTERN FLORIDA
PANHANDLE AND SOUTHWEST ALABAMA FOR LONG DURATIONS OF LOW RELATIVE
HUMIDITY BELOW CRITICAL LEVELS. /22

&&

.AVIATION (20/18Z AND 21/00Z ISSUANCES)...VISUAL FLIGHT RULES FOR
THE NEXT 24 HOURS WITH REGARD TO CIGS/VSBYS...BUT WINDS WILL
INCREASE FROM THE NORTH LATER TONIGHT AS A COLD FRONT MOVES ACROSS
THE REGION. 12/DS

&&

.PRELIMINARY POINT TEMPS/POPS...
MOBILE      41  54  28  57 /  05  00  05  05
PENSACOLA   42  56  30  57 /  05  05  05  05
DESTIN      44  56  37  56 /  05  05  05  05
EVERGREEN   33  52  23  58 /  05  00  05  05
WAYNESBORO  34  51  22  58 /  05  00  05  05
CAMDEN      34  51  24  57 /  05  00  05  05

&&

.MOB WATCHES/WARNINGS/ADVISORIES...
AL...RED FLAG WARNING FROM 11 AM FRIDAY TO 6 PM FRIDAY FOR THE
     FOLLOWING ZONES: BUTLER...CHOCTAW...CLARKE...CONECUH...
     COVINGTON...CRENSHAW...ESCAMBIA...LOWER BALDWIN...LOWER
     MOBILE...MONROE...UPPER BALDWIN...UPPER MOBILE...
     WASHINGTON...AND WILCOX.

     HARD FREEZE WATCH FROM MIDNIGHT SATURDAY TO 8 AM SATURDAY FOR
     THE FOLLOWING ZONES: BUTLER...CHOCTAW...CLARKE...CONECUH...
     COVINGTON...CRENSHAW...ESCAMBIA...MONROE...WASHINGTON...AND
     WILCOX.

     RED FLAG WARNING FROM 10 AM SATURDAY TO 5 PM SATURDAY FOR THE
     FOLLOWING ZONES: BUTLER...CHOCTAW...CLARKE...CONECUH...
     COVINGTON...CRENSHAW...ESCAMBIA...LOWER BALDWIN...LOWER
     MOBILE...MONROE...UPPER BALDWIN...UPPER MOBILE...
     WASHINGTON...AND WILCOX.

FL...RED FLAG WARNING FROM 11 AM FRIDAY TO 6 PM FRIDAY FOR THE
     FOLLOWING ZONES: COASTAL ESCAMBIA...COASTAL OKALOOSA...
     COASTAL SANTA ROSA...INLAND ESCAMBIA...INLAND OKALOOSA...
     AND INLAND SANTA ROSA.

     RED FLAG WARNING FROM 10 AM SATURDAY TO 5 PM SATURDAY FOR THE
     FOLLOWING ZONES: COASTAL ESCAMBIA...COASTAL OKALOOSA...
     COASTAL SANTA ROSA...INLAND ESCAMBIA...INLAND OKALOOSA...
     AND INLAND SANTA ROSA.

     HARD FREEZE WATCH FROM MIDNIGHT SATURDAY TO 8 AM SATURDAY FOR
     THE FOLLOWING ZONES: AND INLAND OKALOOSA.

MS...HARD FREEZE WATCH FROM MIDNIGHT SATURDAY TO 8 AM SATURDAY FOR
     THE FOLLOWING ZONES: GREENE...PERRY...AND WAYNE.

GM...SMALL CRAFT ADVISORY FROM MIDNIGHT FRIDAY TO 6 AM SATURDAY FOR
     THE FOLLOWING ZONES: COASTAL WATERS FROM DESTIN TO
     PENSACOLA FL OUT 20 NM...COASTAL WATERS FROM PENSACOLA FL
     TO PASCAGOULA MS OUT 20 NM...MOBILE BAY...WATERS FROM
     DESTIN TO PENSACOLA FL FROM 20 TO 60 NM...AND WATERS FROM
     PENSACOLA FL TO PASCAGOULA MS FROM 20 TO 60 NM.

&&

Nearby

Hard Freeze Warnings in Alabama, 2008 Hard Freeze Warnings in Mississippi, 2008 Hard Freeze Warnings in Florida, 2008 Every hard freeze warning in 2008

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.