Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 92, NWS Jackson, MS

July 21, 2012Copiah County, Franklin County, Lincoln County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 21, 2012, 9:25 AM CDT for Copiah County, Franklin County, Lincoln County, Mississippi. It was in force for 2 hr. 1 report 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: Jul 21, 2012, 9:25 AM CDT (14:25 UTC)
Expired: Jul 21, 2012, 11:30 AM CDT
In force: 2 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Copiah County, MS, Franklin County, MS, Lincoln County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 92 km from the middle of the area, began a volume at 14:26 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
Jul 21, 10:35 AM CDT	FLASH FLOOD	3 Wnw Brookhaven, MS	COUNTY SO REPORTED WATER COVERING CALIFORNIA ROAD AND WEEKS LANE NEAR LOYD STAR.

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.4 hours before the alert went out and 91 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: 710 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

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

668 
WGUS54 KJAN 211425
FFWJAN
MSC029-037-085-211630-
/O.NEW.KJAN.FF.W.0092.120721T1425Z-120721T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
925 AM CDT SAT JUL 21 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL COPIAH COUNTY IN CENTRAL MISSISSIPPI...
  LINCOLN COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BROOKHAVEN...
  EASTERN FRANKLIN COUNTY IN SOUTHWEST MISSISSIPPI...

* UNTIL 1130 AM CDT

* AT 925 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  BROOKHAVEN TO BUDE. THE LINE OF STORMS WAS NEARLY STATIONARY.      
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO THREE    
  INCHES...HAVE OCCURRED IN THE PAST HOUR.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LITTLE SPRINGS...CENTER POINT AND WEST LINCOLN

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
HOUR WITH AN ADDITIONAL ONE TO THREE INCHES POSSIBLE.

RAINFALL AMOUNTS FROM ONE TO THREE INCHES IN A HOUR CAN CAUSE
FLOODING ALONG HIGHWAY 887 AND PORTIONS OF HIGHWAY 4 TO VERONA STREET
IN THE TOWN OF NEWELLTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE WATER COVERS THE ROADWAY. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3146 9093 3181 9044 3179 9022 3173 9022
      3172 9024 3167 9024 3134 9064 3134 9082

$$

BYB

2 follow-up statements

733 
WGUS74 KJAN 211522
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1022 AM CDT SAT JUL 21 2012

MSC029-037-085-211630-
/O.CON.KJAN.FF.W.0092.000000T0000Z-120721T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN MS-FRANKLIN MS-COPIAH MS-
1022 AM CDT SAT JUL 21 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
SOUTH CENTRAL COPIAH...EASTERN FRANKLIN AND LINCOLN COUNTIES...

AT 1022 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT HEAVY RAIN OVER MUCH OF THE WARNED AREA. ESTIMATED RADAR 
RAINFALL AMOUNTS...ON THE ORDER OF TWO TO FOUR INCHES...HAVE 
OCCURRED IN THE PAST TWO HOURS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MARTINSVILLE...LOYD STAR AND WESSON

LOCALLY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE 
NEXT HOUR WITH AN ADDITIONAL ONE INCH POSSIBLE.

RAINFALL AMOUNTS FROM ONE TO THREE INCHES IN AN HOUR CAN CAUSE
FLOODING ALONG HIGHWAY 887 AND PORTIONS OF HIGHWAY 4 TO VERONA STREET
IN THE TOWN OF NEWELLTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE WATER COVERS THE ROADWAY. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3146 9093 3181 9044 3179 9022 3173 9022
      3172 9024 3167 9024 3134 9064 3134 9082

$$

BYB

317 
WGUS74 KJAN 211636
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1136 AM CDT SAT JUL 21 2012

MSC029-037-085-211646-
/O.EXP.KJAN.FF.W.0092.000000T0000Z-120721T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN MS-FRANKLIN MS-COPIAH MS-
1136 AM CDT SAT JUL 21 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTH CENTRAL COPIAH...
EASTERN FRANKLIN AND LINCOLN COUNTIES...

LIGHT TO MODERATE RAIN MAY CONTINUE FOR ANOTHER HOUR...BUT 
ADDITIONAL FLASH FLOODING ISSUES ARE NOT ANTICIPATED.

LAT...LON 3146 9093 3181 9044 3179 9022 3173 9022
      3172 9024 3167 9024 3134 9064 3134 9082

$$

BYB

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 7:00 PM CDT	Special Weather Statement	JAN	Simpson	30 min
Jul 20, 7:07 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne	38 min
Jul 20, 7:11 PM CDT	Special Weather Statement	JAN	Simpson	29 min
Jul 21, 3:48 AM CDT	Special Weather Statement	JAN	Noxubee	32 min
Jul 21, 4:19 AM CDT	Special Weather Statement	JAN	Lowndes, Noxubee	56 min
Jul 21, 5:45 AM CDT	Special Weather Statement	JAN	Newton	45 min
Jul 21, 5:50 AM CDT	Severe Thunderstorm Warning	JAN	Newton	27 min
Jul 21, 6:38 AM CDT	Flash Flood Warning	JAN	Kemper, Lauderdale	2 hr
Jul 21, 6:56 AM CDT	Special Weather Statement	JAN	Rankin	59 min
Jul 21, 7:07 AM CDT	Flash Flood Warning	JAN	Holmes	3 hr
Jul 21, 8:28 AM CDT	Flash Flood Warning	JAN	Rankin	2 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.