Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 9, NWS Mobile, AL

March 22, 20125 counties in Mississippi

NWS Mobile, AL issued this flash flood warning at Mar 22, 2012, 9:41 AM CDT for 5 counties in Mississippi. It was in force for 6 hr. 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: Mar 22, 2012, 9:41 AM CDT (14:41 UTC)
Expired: Mar 22, 2012, 3:30 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 81 km from the middle of the area, began a volume at 14:43 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
Mar 22, 10:43 AM CDT	HEAVY RAIN 0	Waynesboro, MS	4.85 INCHES REPORTED BY LOCAL COOP SITE AT 7AM...CITY POLICE REPORTING LOCALIZED STREET FLOODING.
Mar 22, 10:43 AM CDT	HEAVY RAIN 4.85	Waynesboro, MS	4.85 INCHES REPORTED BY LOCAL COOP STATION AT 7AM...CITY POLICE DEPT. REPORTING LOCALIZED STREET FLOODING.
Mar 22, 11:14 AM CDT	HEAVY RAIN 0	3 Ne Waynesboro, MS	COUNTY EMERGENCY MANAGER REPORTS CHAPPARAL/HIWANEE ROAD CUT IN HALF BY RUNNING WATER.
Mar 22, 11:14 AM CDT	HEAVY RAIN 0	E Wiggins, MS	EMERGENCY MANAGER REPORTS SMALL CREEKS AND STREAMS COUNTY WIDE NEAR BANK FULL...ADDITIONAL RAIN EXPECTED TO CAUSE OVER TOPPING.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.7 hours before the alert went out and 108 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 438 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 377 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

523 
WGUS54 KMOB 221441
FFWMOB
MSC039-041-111-131-153-222030-
/O.NEW.KMOB.FF.W.0009.120322T1441Z-120322T2030Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
941 AM CDT THU MAR 22 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  STONE COUNTY IN SOUTHEAST MISSISSIPPI...
  WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 330 PM CDT

* AT 941 AM CDT...VERY HEAVY RAIN HAS FALLEN OVERNIGHT OVER MUCH OF 
SOUTHEASTERN MISSISSIPPI. IN SOME CASES...FIVE TO SEVEN INCH STORM 
TOTALS HAVE ALREADY OCCURRED ESPECIALLY OVER EASTERN GREENE AND 
STONE COUNTIES SINCE LAST EVENING. THE AXIS OF HEAVY RAINFALL WILL 
SLOWLY SHIFT EAST THROUGH THE AFTERNOON AND RADAR CURRENTLY SHOWS 3 
TO 4 INCH PER THREE HOUR AND 2 TO 3 INCH PER HOUR RAINFALL RATES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLARA...
  MCLAIN...NEW AUGUSTA AND BEAUMONT

SEVERAL LINES OF SHOWERS AND THUNDERSTORMS WILL CONTINUE STREAMING 
ACROSS MOST OF INTERIOR SOUTHEASTERN MISSISSIPPI DURING THE NEXT 12 
TO 24 HOURS. ADDITIONAL RAINFALL AMOUNTS OF 4 TO 6 INCHES IS 
POSSIBLE LOCALLY.

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. TURN AROUND...DONT DROWN.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3092 8914 3143 8915 3144 8895 3183 8894
      3187 8854 3075 8852 3073 8865 3073 8888
      3069 8888 3067 8923 3064 8924 3064 8934
      3091 8935

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 10:11 PM CDT	River Flood Warning	MOB	George, Greene, Perry	9 days
Mar 22, 2:02 AM CDT	Flash Flood Warning	MOB	Stone	3 hr
Mar 22, 2:04 AM CDT	Tornado Warning	MOB	Perry	23 min
Mar 22, 3:31 AM CDT	Flash Flood Warning	MOB	Perry	3 hr
Mar 22, 9:58 AM CDT	River Flood Warning	MOB	George, Greene, Jackson	9 days
Mar 22, 10:00 AM CDT	River Flood Warning	MOB	George, Greene, Wayne	9 days
Mar 22, 1:36 PM CDT	Flash Flood Warning	MOB	George, Greene	6 hr
Mar 22, 4:01 PM CDT	Areal Flood Warning	MOB	Greene, Wayne	12 hr

Nearby

Flash Flood Warnings in Mississippi, 2012 Every flash flood warning in 2012

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.