Alert archive / Alabama / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 339, NWS Mobile, AL

December 16, 2000Mobile County, Alabama; Greene County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Dec 16, 2000, 2:42 PM CST for Mobile County, Alabama; Greene County, Mississippi. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Dec 16, 2000, 2:42 PM CST (20:42 UTC)
Expired: Dec 16, 2000, 3:15 PM CST
In force: 33 min
Issued by: NWS Mobile, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Mobile County, AL, Greene County, MS

The watch it was issued in

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

Issued	Product	Office	Lasted
Dec 16, 1:30 PM CST	Severe Thunderstorm Watch	SPC	6 hr
Dec 16, 10:15 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 143 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: 745 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 516 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 162042
SVRMOB
ALC097-MSC041-162115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
242 PM CST SAT DEC 16 2000

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI
  
* UNTIL 315 PM CST

* AT 242 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER VERNAL...MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEAKESVILLE BY 250 PM CST
  PISGAH BY 255 PM CST
  ROUNSAVILLE BY 300 PM CST

STRONG DAMAGING WIND...LARGE HAIL...AND HEAVY RAIN ARE LIKELY WITH_
THIS STORM.  IF IN THE PATH OF THIS STORM...TAKE COVER IN A STURDY
SHELTER UNTIL THE STORM HAS PASSED.

LAT...LON 3110 8873 3092 8871 3093 8827 3123 8826

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 Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 16, 5:55 AM CST, 8 hours 47 minutes earlier.

Area forecast discussion, Dec 16, 5:55 AM CST, 8 hours 47 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MOBILE AL
555 AM CST SAT DEC 16 2000

UPON FURTHER REVIEW...WILL NOT EXTEND DENSE FOG ADVISORY FOR
ALZ039-051>060 AND MSZ067-075-076.  WARM FRONT CONTINUES TO PUSH N
ACROSS FA EARLY THIS MORNING...AND MIXING S OF THE BOUNDARY IS
RESULTING IN DISSIPATION OF WIDESPREAD DENSE FOG.  LATEST OBS
INDICATE GENERAL 1/2SM TO 3SM VSBY'S OVER AREA.  ALONG COASTAL AREAS
VSBY'S ARE EVEN BETTER...RANGING 1/2SM TO P6SM.  WILL THEREFORE
UPDATE ZONES TO REMOVE DENSE FOG ADVISORY HEADER FOR THIS MORNING.
WILL CONTINUE WORDING OF PATCHY MORNING FOG...HOWEVER.  ADDITIONALLY
...SPC RECENTLY CALLED TO GIVE HEADS-UP OF UPCOMING MODERATE SVR
RISK FOR TODAY...PRIMARILY OVER NRN PORTIONS OF FA.  ATTM APPEARS
LINE OF STRONG/SVR STORMS COULD BE OVER CENTRAL AL AROUND 18Z-21Z
TIME FRAME THIS AFTERNOON.  ZONES ALREADY HAVE MENTION OF SVR FOR
TODAY.  OTHERWISE...NO CHANGES.  UPDATE OUT SHORTLY.

PRELIMINARY NUMBERS...
MOB TU 073/033 045/026 056 12700
PNS TU 074/036 048/030 056 12700
DTS TU 074/036 048/030 056 12700
GZH TU 068/030 040/023 050 129-0
2R0 TU 064/026 040/021 052 12900
61A TU 068/030 040/023 050 129-0

MOB...
AL...SCA TODAY GMZ650-670.
FL...SCA TODAY GMZ655-675.
MS...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 16, 1:09 AM CST	Severe Thunderstorm Warning	MOB	Marengo	51 min
Dec 16, 12:39 PM CST	Severe Thunderstorm Warning	MOB	Marengo	51 min
Dec 16, 2:37 PM CST	Tornado Warning	MOB	Choctaw, Clarke, Washington	23 min
Dec 16, 4:02 PM CST	Tornado Warning	MOB	Conecuh, Monroe	28 min
Dec 16, 4:31 PM CST	Tornado Warning	MOB	Butler, Conecuh, Monroe	29 min
Dec 16, 4:50 PM CST	Severe Thunderstorm Warning	MOB	Escambia	40 min
Dec 16, 5:22 PM CST	Severe Thunderstorm Warning	MOB	Covington	38 min
Dec 16, 1:32 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	43 min
Dec 16, 1:43 PM CST	Severe Thunderstorm Warning	MOB	George, Stone	62 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2000 Severe Thunderstorm Warnings in Mississippi, 2000 Every severe thunderstorm warning in 2000

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.