Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 1, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Jan 2, 1999, 8:38 AM CST for Wayne County, Mississippi. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 2, 1999, 8:38 AM CST (14:38 UTC)
- Expired
- Jan 2, 1999, 9:45 AM CST
- In force
- 67 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Wayne County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 2.6 hours before the alert went out and 151 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.
- Mixed-layer CAPE
- 218 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 396 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KMOB 021439 RRA SVRMOB MSC153-021545- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 838 AM CST SAT JAN 2 1999 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WAYNE COUNTY IN SOUTHEASTERN MISSISSIPPI * UNTIL 945 AM CST * AT 837 AM CST... AS INDICATED BY DOPPLER RADAR A SEVERE THUNDERSTORM WAS LOCATED 17 MILES SOUTHWEST OF WAYNESBORO... MOVING NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL REACH THE VICINITY OF - WAYNESBORO BY 905 AM CST WOODWARDS BY 905 AM CST BOICE BY 905 AM CST MATHERVILLE BY 925 AM CST A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.
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 Jan 2, 2:32 AM CST, 6 hours 6 minutes earlier.
Area forecast discussion, Jan 2, 2:32 AM CST, 6 hours 6 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOBILE AL 230 AM CST SAT JAN 2 1998 COMPLEX OF STRONG/SEVERE STORMS GETTING ALIGNED AHEAD OF FRONT AS SYSTEM PUSHES OUT OF SERN TX INTO WRN LA EARLY THIS MORNING. ETA STILL PREFERRED MODEL ON TIMING OF FRONTAL BOUNDARY TODAY AS IT SEEMS TO HANDLE SURFACE REFLECTION ACROSS ERN TX THE BEST. NGM TOO FAR S WITH MAIN SURFACE LOW...AND SEEMS TO BE LAGGING A BIT ON FRONTAL MOVEMENT (AGAIN). BEST GUESS ATTM WOULD PLACE FRONT INTO SERN MS MID TO LATE MORNING...TO NEAR MOB AROUND MIDDAY...AND ACROSS ERN FORECAST ZONES BY MID/LATE AFTERNOON. 40KT 1-3 KFT WINDS ALREADY NOTED ON KMOB VAD WIND PROFILE AT 08Z. EXPECT WINDS TO CONT INCREASING AS GRADIENT TIGHTENS. SHEAR PROFILES OVER AREA NOT THAT IMPRESSIVE RIGHT NOW...BUT AS FRONT APPROACHES EXPECT WINDS IN THE 2-6KFT LAYER TO BECOME MORE SWLY ENHANCING HELICITIES BY MID MORNING ALONG THE CENTRAL GULF COAST. LOOKS LIKE A BUSY DAYSHIFT ON HAND AS LINE OF THUNDERSTORMS/HEAVY RAIN MOVES ACROSS. HEAVY RAINS SHOULD SHIFT EAST WITH FRONT DURING THE EARLY EVENING HOURS WITH THICKNESSES PLUMMETING THROUGH THE NIGHT ON THE HEELS OF STRONG NWLY COLD ADVECTION. ETA PUTS THE 534 1000-500 MB THICKNESS ACROSS OUR NORTHERN ZONES LATE TOMORROW. EVEN THE FWC IS FORECASTING A LOW OF 22 AT MOBILE BY 12Z MON. NOT SURE IT WILL GET QUITE THAT COLD...BUT LOW/MID 20S ACROSS THE NORTHERN ZONES WITH MID/UPPER 20S ALONG THE COAST DEFINATELY POSSIBLE. GROWERS SHOULD BE ALERTED EARLY TODAY TO THIS THREAT SO THEY CAN TAKE NECESSARY PRECAUTIONS AGAINST A HARD/KILLING FREEZE DURING NEXT 48 HOURS. OVER THE COASTAL WATERS...SLY WINDS START PICKING UP IN EARNEST TODAY AS FRONT MOVES CLOSER...BECOMING WLY THEN NWLY THIS EVENING GUSTING AROUND 30 KTS AT TIMES OVERNIGHT AND EARLY TOMORROW IN WAKE OF FRONT. NUMEROUS STRONG THUNDERSTORMS ALONG AND AHEAD OF FRONT WITH SEAS BUILDING TO 9 FT EARLY TONIGHT...10 FT TOMORROW WITH STRONG NLY rOFFSHORE FLOW. SMALL CRAFT ADVISORYS REMAIN IN EFFECT. EXPECT WINDS TO BEGIN RELAXING MON INTO TUE AS HI PRES BUILDS IN FROM NW. MOB 66/34/40/24 92-- PNS 68/38/40/28 84-- DTS 68/41/42/30 741- GZH 64/33/39/22 82-- 05
In the hours before
Special weather statement, Jan 2, 5:12 AM CST, 3 hours 26 minutes before
ALZ051>064-MSZ067-075-076-078-079-FLZ001>006-031500- HAZARDOUS WEATHER OUTLOOK FOR SOUTHWEST AL...NORTHWEST FL AND SOUTHEAST MS NATIONAL WEATHER SERVICE MOBILE AL 600 AM CST SAT JAN 02 1999 ...THERE IS A CHANCE OF SEVERE THUNDERSTORMS ALONG THE CENTRAL GULF COAST TODAY... A STRONG COLD FRONT WILL CONTINUE MOVING EAST OUT OF THE SOUTHERN PLAINS AND INTO THE SOUTHEASTERN STATES TODAY. AHEAD OF THIS FRONT...A LINE OF STRONG TO POTENTIALLY SEVERE THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST MISSISSIPPI AND PORTIONS OF SOUTHWEST ALABAMA THIS MORNING...AND ACROSS NORTHWEST FLORIDA BY EARLY AFTERNOON. DOWNBURST WIND AND LARGE HAIL WILL BE THE PRIMARY THREAT WITH THE MAIN LINE OF THUNDERSTORMS. SCATTERED STORMS THAT FORM AHEAD OF THE SQUALL LINE MAY BECOME SEVERE AS WELL. A FEW OF THESE SCATTERED STORMS MAY BECOME ORGANIZED ENOUGH TO PRODUCE ISOLATED TORNADOES ALONG THE CENTRAL GULF COAST THROUGH EARLY AFTERNOON. ALL RESIDENTS ACROSS SOUTHEAST MISSISSIPPI...SOUTHWEST ALABAMA... AND NORTHWEST FLORIDA SHOULD STAY IN TOUCH WITH THE LATEST WEATHER DEVELOPMENTS TODAY. REMAIN ALERT FOR POTENTIAL SEVERE WEATHER WATCHES AND WARNINGS FROM YOUR NATIONAL WEATHER SERVICE. THE STRONGEST STORMS SHOULD MOVE THROUGH SOUTHEAST MISSISSIPPI BY MID MORNING...THROUGH THE MOBILE AREA BY LATE MORNING...AND INTO NORTHWEST FLORIDA BY MIDDAY. THE LINE OF STRONG STORMS WILL EXIT TO THE EAST BY MID AFTERNOON AS THE COLD FRONT SW>EEPS ACROSS THE REGION USHERING IN A MUCH COLDER...STABLE AIRMASS. ACTIVATION OF SPOTTERS AND EMA PERSONNEL ACROSS SOUTHEAST MISSISSIPPI ...SOUTHWEST ALABAMA...AND NORTHWEST FLORIDA WILL LIKELY BE REQUIRED TODAY.
Special weather statement, Jan 2, 6:00 AM CST, 2 hours 38 minutes before
ALZ051>064-MSZ067-075-076-078-079-FLZ001>006-031500- HAZARDOUS WEATHER OUTLOOK FOR SOUTHWEST AL...NORTHWEST FL AND SOUTHEAST MS NATIONAL WEATHER SERVICE MOBILE AL 600 AM CST SAT JAN 02 1999 ...THERE IS A CHANCE OF SEVERE THUNDERSTORMS ALONG THE CENTRAL GULF COAST TODAY... A STRONG COLD FRONT WILL CONTINUE MOVING EAST OUT OF THE SOUTHERN PLAINS AND INTO THE SOUTHEASTERN STATES TODAY. AHEAD OF THIS FRONT...A LINE OF STRONG TO POTENTIALLY SEVERE THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST MISSISSIPPI AND PORTIONS OF SOUTHWEST ALABAMA THIS MORNING...AND ACROSS NORTHWEST FLORIDA BY EARLY AFTERNOON. DOWNBURST WIND AND LARGE HAIL WILL BE THE PRIMARY THREAT WITH THE MAIN LINE OF THUNDERSTORMS. SCATTERED STORMS THAT FORM AHEAD OF THE SQUALL LINE MAY BECOME SEVERE AS WELL. A FEW OF THESE SCATTERED STORMS MAY BECOME ORGANIZED ENOUGH TO PRODUCE ISOLATED TORNADOES ALONG THE CENTRAL GULF COAST THROUGH EARLY AFTERNOON. ALL RESIDENTS ACROSS SOUTHEAST MISSISSIPPI...SOUTHWEST ALABAMA... AND NORTHWEST FLORIDA SHOULD STAY IN TOUCH WITH THE LATEST WEATHER DEVELOPMENTS TODAY. REMAIN ALERT FOR POTENTIAL SEVERE WEATHER WATCHES AND WARNINGS FROM YOUR NATIONAL WEATHER SERVICE. THE STRONGEST STORMS SHOULD MOVE THROUGH SOUTHEAST MISSISSIPPI BY MID MORNING...THROUGH THE MOBILE AREA BY LATE MORNING...AND INTO NORTHWEST FLORIDA BY MIDDAY. THE LINE OF STRONG STORMS WILL EXIT TO THE EAST BY MID AFTERNOON AS THE COLD FRONT SWEEPS ACROSS THE REGION USHERING IN A MUCH COLDER...STABLE AIRMASS. ACTIVATION OF SPOTTERS AND EMA PERSONNEL ACROSS SOUTHEAST MISSISSIPPI ...SOUTHWEST ALABAMA...AND NORTHWEST FLORIDA WILL LIKELY BE REQUIRED TODAY.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 8:48 AM CST | Severe Thunderstorm Warning | MOB | George, Stone | 57 min |
| Jan 2, 9:05 AM CST | Severe Thunderstorm Warning | MOB | Greene | 55 min |
| Jan 2, 9:19 AM CST | Tornado Warning | MOB | Greene | 41 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning in 1999
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.