Alert archive / Texas / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS Fort Worth, TX

May 20, 2011Fannin County, Texas

NWS Fort Worth, TX issued this flash flood warning at May 20, 2011, 5:23 PM CDT for Fannin County, Texas. It was in force for 3 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: May 20, 2011, 5:23 PM CDT (22:23 UTC)
Expired: May 20, 2011, 8:15 PM CDT
In force: 3 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

County Fannin County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 174 km from the middle of the area, began a volume at 22:26 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
May 20, 7:02 PM CDT	FLASH FLOOD	1 W Telephone, TX	FLOODED ROADWAY AT FM 273. OTHER REPORTS OF FLASH FLOODING IN TRENTON AND BETWEEN IVANHOE AND LAKE FANNIN.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 99 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.4 hours before the alert went out and 153 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: 2657 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

974 
WGUS54 KFWD 202223
FFWFWD
TXC147-210115-
/O.NEW.KFWD.FF.W.0008.110520T2223Z-110521T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
523 PM CDT FRI MAY 20 2011

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FANNIN COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 815 PM CDT

* AT 521 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
THUNDERSTORMS PRODUCING HEAVY RAIN OVER ALL OF FANNIN COUNTY. RADAR 
INDICATES THAT 2 TO 3 INCHES OF RAIN HAS ALREADY FALLEN.   ANOTHER 2 
TO 3 INCHES WILL BE POSSIBLE THROUGH 815 PM CDT.  THE HEAVIEST 
RAINFALL HAS FALLEN AROUND BONHAM...TIMBER CREEK WILL LIKELY 
EXPERIENCE FLASH FLOODING SHORTLY.  COUNTY OFFICIALS REPORT FLOODING 
OF LOW LYING AREAS AROUND FANNIN COUNTY IS ONGOING.

* LOCATIONS THAT WILL CONTINUE TO BE AFFECTED BY HEAVY RAIN   
INCLUDE...BONHAM...HONEY GROVE AND TRENTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROADWAY REMEMBER...TURN AROUND DONT DROWN. IT
ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY MOST SPORT UTILITY
VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO REACH YOUR
DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...MOST FLOOD 
RELATED DEATHS OCCUR IN AUTOMOBILES.

&&

LAT...LON 3386 9587 3384 9584 3341 9586 3334 9638
      3372 9638 3370 9633 3377 9629 3376 9619
      3380 9616 3381 9618 3385 9613 3385 9601
      3388 9600 3387 9595 3389 9593

$$


CAVANAUGH

1 follow-up statement

731 
WGUS74 KFWD 210106
FFSFWD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
806 PM CDT FRI MAY 20 2011

TXC147-210115-
/O.EXP.KFWD.FF.W.0008.000000T0000Z-110521T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FANNIN TX-
806 PM CDT FRI MAY 20 2011

...THE FLASH FLOOD WARNING FOR FANNIN COUNTY EXPIRES AT 815 PM CDT...

THE HEAVY RAINFALL HAS ENDED ACROSS THE WARNED AREA...AND LOCAL LAW 
ENFORCEMENT REPORTS THAT WATER OVER COUNTY ROADWAYS HAS 
RECEDED...THEREFORE THE FLASH FLOOD WARNING WILL BE ALLOWED TO 
EXPIRE.

TO REPORT PREVIOUS FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
FORT WORTH.

LAT...LON 3386 9587 3384 9584 3341 9586 3334 9638
      3372 9638 3370 9633 3377 9629 3376 9619
      3380 9616 3381 9618 3385 9613 3385 9601
      3388 9600 3387 9595 3389 9593

$$


CAVANAUGH

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this flash flood warning went out at May 20, 4:30 PM CDT, 53 minutes earlier.

Area forecast discussion, May 20, 4:30 PM CDT, 53 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
430 PM CDT FRI MAY 20 2011

.UPDATE...
QUICK UPDATE TO REMOVE COUNTIES ALONG WEST OF A GAINESVILLE TO
GOLDTHWAITE LINE AS STRONG TO OCCASIONALLY SEVERE THUNDERSTORMS
PROPAGATE SLOWLY BUT STEADILY EASTWARD. OTHERWISE FORECAST PACKAGE
REMAINS UNCHANGED.

30

&&

.PREV DISCUSSION... /ISSUED 256 PM CDT FRI MAY 20 2011/

SHORT TERM FORECAST DISCUSSION OF ENVIRONMENTAL CONDITIONS
REMAINS LARGELY UNCHANGED FROM AREA WEATHER UPDATE FORECAST
DISCUSSION /PRODUCT AWUFWD/ ISSUED AROUND 11 AM...SO WILL NOT
REHASH THE DETAILS HERE. TO ADD TO THIS DISCUSSION SOUTHERLY FLOW
OUT AHEAD OF THE LINE OF TSTMS EXTENDING FROM GAINESVILLE TO NEAR
DENTON AND THEN SOUTHWEST TOWARDS WEATHERFORD AND STEPHENVILLE
INCREASED TO AROUND 15 KTS WITH HIGHER GUSTS AS OF 19Z. IF ANY
DISCRETE STORMS CAN ORGANIZE EAST OF THIS LINE THIS INCREASE IN
LOW LEVEL FLOW SHOULD ENHANCE TORNADO THREAT THROUGH 00Z.
THUNDERSTORMS IN GENERAL WILL LIKELY CONTINUE TO DEVELOP AND GROW
UPSCALE INTO A MULTICELLULAR LINE AS THEY HAVE BEEN THE PAST HOUR
OR SO...BUT WILL BE WATCHING ANY DISCRETE STORMS OUT AHEAD OF THIS
LINE CLOSELY THROUGH SUNSET. AFTER SUNSET THE LOSS OF DAYTIME
HEATING SHOULD DIMINISH THE OVERALL TORNADO THREAT ACROSS NORTH
TEXAS. OTHERWISE A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT
THRU 8 PM CDT AND ANY STORM THAT DEVELOPS WITHIN THE WATCH WILL
CONTINUE TO HAVE A CHANCE TO PRODUCE LARGE HAIL AND DAMAGING
OUTFLOW WINDS.

THE SOUTHERN PLAINS SHORTWAVE TROUGH WILL CONTINUE TO MOVE EAST
THRU THE REGION OVERNIGHT. THE PASSAGE OF THIS TROUGH IS EXPECTED
TO SEND THE LINE OF CONVECTION SOUTHEAST THRU THE FORECAST AREA
TONIGHT AS WELL AS FORCE THE WEST CENTRAL TX DRYLINE EAST INTO THE
FORECAST AREA BEFORE SUNRISE. THE DRYLINE IS EXPECTED TO SET UP
JUST WEST OF THE METROPLEX TOMORROW AND SHOULD BECOME MORE
DIFFUSE LATER IN THE DAY AS THE LACK OF STRONG SYNOPTIC FORCING
WILL ALLOW BOUNDARY LAYER MOISTURE TO RECOVER DURING THE AFTERNOON
HRS. EAST OF THE DRYLINE A MOIST AND UNSTABLE AIRMASS WILL REMAIN
IN PLACE...HOWEVER ONLY HAVE A MENTION OF 20 PERCENT CHANCE OF
STORMS WITH AN ABSENCE OF OBVIOUS FORCING FOR ASCENT WITH THE
DRYLINE EXPECTED TO LOSE DEFINITION THROUGHOUT THE DAY. H500
HEIGHT RISES OF 3-4 DM ARE EXPECTED OVER NORTH TX TOMORROW WHICH
SHOULD FAVOR WEAK FORCING FOR SUBSIDENCE OVER THE REGION TOMORROW
AFTERNOON. IF ANY STORM IS ABLE TO DEVELOP IT WILL LIKELY BECOME
SEVERE WITH OVER 3000 J/KG OF CAPE FORECAST OVER THE SOUTHEASTERN
COUNTIES OF THE CWA. DEEP LAYER SHEAR IS SOMEWHAT MARGINAL...BUT
REMAINS SUPPORTIVE OF ORGANIZED CONVECTION...HOWEVER WEAK FORCING
FOR SUBSIDENCE IS EXPECTED TO BE SUFFICIENT TO PREVENT INITIATION
AT THIS TIME.

THE DRYLINE IS EXPECTED TO RETREAT NORTHWEST ON SUNDAY AS A WEAK
SHORTWAVE TROUGH MOVES INTO THE SOUTHERN PLAINS. THIS FEATURE IS
EXPECTED TO MOVE OVER NORTH CENTRAL TX LATE SUNDAY AFTERNOON.
GUIDANCE HAS BEEN FAIRLY CONSISTENT IN DEVELOPING AN MCS WHERE THE
LARGE SCALE FORCING FOR ASCENT BEST INTERSECTS THE DIFFUSE DRYLINE
BOUNDARY NEAR WICHITA FALLS. AFTER INITIATION MODELS DEVELOP A
STRONG MID LVL POTENTIAL VORTICITY ANOMALY DUE TO STRONG LATENT
HEAT RELEASE ASSOCIATED WITH THE MCS. THIS FEATURE PROPAGATES
DOWNSTREAM AND INTENSIFIES DUE TO FEEDBACK FOR THE EVENING HRS
OVER THE NORTHWESTERN THIRD OF THE CWA. WHILE RAW MODEL OUTPUT IS
LIKELY WRONG REGARDING THE HUGE QPF BULLS-EYE GENERATED FROM THIS
MCS...THE INITIATION OF AN MCS WHERE THE SHORTWAVE TROUGH
INTERACTS WITH THE SFC DRYLINE LOOKS REASONABLE ENOUGH. WENT AHEAD
WITH A 30 PERCENT CHANCE OF STORMS NORTHWEST OF THE METROPLEX
SUNDAY AFTERNOON...EXTENDING SOUTHEAST INTO THE METROPLEX AFTER
00Z FOR SUNDAY EVENING ANTICIPATING THE MCS WILL PROPAGATE
SOUTHEAST INTO THE CWA ON A STRONG COLD POOL.

EXTENDED...OTHERWISE OUR NEXT BEST CHANCE OF STORMS LOOKS TO OCCUR
ON WEDNESDAY AS THE NEXT STRONG SHORTWAVE TROUGH MOVES THROUGH THE
PLAINS. THIS MIDWEEK TROUGH IS EXPECTED TO SEND A COLD FRONT
SOUTHEAST THRU NORTH TX WEDNESDAY WHICH WILL LIKELY BE ACCOMPANIED
BY SCATTERED TSTMS AS IT MOVES THRU THE FORECAST AREA. BEHIND THIS
TROUGH UPPER RIDGING BUILDS OVER THE SOUTHERN PLAINS FOR THE END
OF THE WEEK WHICH WILL SUPPORT A DRY FORECAST AT THIS TIME.

CAVANAUGH

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  68  91  73  87  71 /  40  10  10  20  30
WACO, TX              70  95  74  91  73 /  40  20  20  10  10
PARIS, TX             68  85  69  84  68 /  60  10  10  20  20
DENTON, TX            61  87  72  86  69 /  40   5  10  20  30
MCKINNEY, TX          66  87  72  86  70 /  40  10  10  20  30
DALLAS, TX            70  91  73  86  72 /  40  10  10  20  30
TERRELL, TX           71  89  71  88  70 /  50  10  10  10  20
CORSICANA, TX         73  90  73  89  72 /  60  20  20  10  20
TEMPLE, TX            70  92  73  91  72 /  50  20  20  10  10
MINERAL WELLS, TX     58  90  69  87  70 /  20   5  10  20  30

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

Hazardous weather outlook, May 20, 2:52 PM CDT, 2 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
252 PM CDT FRI MAY 20 2011

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211200-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
252 PM CDT FRI MAY 20 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE NORTHEAST THROUGH
THE EASTERN TWO THIRDS OF NORTH TEXAS THIS AFTERNOON AND TONIGHT.
THESE STORMS WILL REMAIN CAPABLE OF PRODUCING SEVERE WEATHER
THROUGH SUNSET. LARGE HAIL AND DAMAGING OUTFLOW WINDS ARE THE
PRIMARY SEVERE WEATHER HAZARDS. THESE STORMS WILL REMAIN CAPABLE
OF PRODUCING HEAVY RAINFALL WHICH MAY LEAD TO LOCALIZED FLOODING
PROBLEMS. AN ISOLATED TORNADO CANNOT BE RULED OUT THROUGH SUNSET.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

LOW THUNDERSTORM CHANCES WILL CONTINUE FROM SATURDAY THROUGH
WEDNESDAY ACROSS VARIOUS PORTIONS OF NORTH TEXAS EACH DAY.
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL CONTINUE TO BE NEEDED THROUGH SUNSET FOR
THE EASTERN TWO THIRDS OF NORTH TEXAS.

CAVANAUGH

In the hours before

Special weather statement, May 20, 4:52 PM CDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
452 PM CDT FRI MAY 20 2011

TXZ157-202215-
CORYELL TX-
452 PM CDT FRI MAY 20 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN CORYELL COUNTY

AT 452 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 10 MILES NORTH OF FORT HOOD...MOVING NORTHEAST AT
25 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE COPPERAS COVE...FORT
GATES...GATESVILLE AND MOTHER NEFF STATE PARK.

NICKEL-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FRIDAY
EVENING FOR CENTRAL TEXAS.

LAT...LON 3107 9791 3132 9808 3153 9756 3132 9742
      3129 9748
TIME...MOT...LOC 2152Z 243DEG 23KT 3128 9776

82/JLD

Local storm report, May 20, 5:01 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
501 PM CDT FRI MAY 20 2011

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0458 PM     HAIL             LUCAS                   33.08N  96.58W
05/20/2011  M1.50 INCH       COLLIN             TX   AMATEUR RADIO

Local storm report, May 20, 5:07 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
507 PM CDT FRI MAY 20 2011

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0305 PM     HAIL             EVANT                   31.47N  98.15W
05/20/2011  E1.00 INCH       HAMILTON           TX   LAW ENFORCEMENT

Local storm report, May 20, 5:18 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
518 PM CDT FRI MAY 20 2011

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     HAIL             COPPERAS COVE           31.13N  97.92W
05/20/2011  E0.88 INCH       CORYELL            TX   LAW ENFORCEMENT

Special weather statement, May 20, 5:18 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
518 PM CDT FRI MAY 20 2011

TXZ147-161-202245-
FREESTONE TX-LIMESTONE TX-
518 PM CDT FRI MAY 20 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  FREESTONE COUNTY
  LIMESTONE COUNTY

AT 517 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 12 MILES SOUTH OF TEAGUE...MOVING NORTHEAST AT 30
MPH. ADDITIONAL STRONG THUNDERSTORMS WERE ALSO OCCURRING IN THESE
COUNTIES.

CITIES IN THE PATH OF THIS STORM INCLUDE FAIRFIELD...GROESBECK...
MEXIA...TEAGUE...WORTHAM AND FORT PARKER STATE PARK.

NICKEL-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FRIDAY
EVENING FOR CENTRAL TEXAS.

LAT...LON 3155 9595 3138 9631 3137 9632 3129 9646
      3157 9683 3189 9630
TIME...MOT...LOC 2217Z 215DEG 28KT 3148 9629

82/JLD

Local storm report, May 20, 5:23 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
523 PM CDT FRI MAY 20 2011

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0521 PM     FLOOD            BONHAM                  33.58N  96.18W
05/20/2011                   FANNIN             TX   AMATEUR RADIO

            STREET FLOODING ON HWY 56 JUST SOUTH OF BONHAM

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 8:52 AM CDT	Special Weather Statement	FWD	Jack	23 min
May 20, 9:27 AM CDT	Special Weather Statement	FWD	Erath	33 min
May 20, 10:20 AM CDT	Special Weather Statement	FWD	Cooke	25 min
May 20, 10:54 AM CDT	Special Weather Statement	FWD	Lamar	36 min
May 20, 12:07 PM CDT	Special Weather Statement	FWD	Mills	23 min
May 20, 12:32 PM CDT	Special Weather Statement	FWD	Mills	28 min
May 20, 12:36 PM CDT	Special Weather Statement	FWD	Wise	24 min
May 20, 12:46 PM CDT	Severe Thunderstorm Warning	FWD	Parker, Wise	59 min
May 20, 1:15 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton, Mills	45 min
May 20, 1:48 PM CDT	Special Weather Statement	FWD	Cooke, Denton	27 min
May 20, 2:04 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Denton	41 min
May 20, 2:09 PM CDT	Special Weather Statement	FWD	Dallas	36 min
May 20, 2:13 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas	47 min
May 20, 2:16 PM CDT	Severe Thunderstorm Warning	FWD	Parker, Tarrant	44 min
May 20, 2:38 PM CDT	Severe Thunderstorm Warning	FWD	Coryell, Hamilton, Lampasas	52 min
May 20, 2:40 PM CDT	Special Weather Statement	FWD	Grayson	35 min
May 20, 2:46 PM CDT	Areal Flood Advisory	FWD	Cooke, Grayson	119 min
May 20, 2:58 PM CDT	Special Weather Statement	FWD	Hood	32 min
May 20, 3:23 PM CDT	Special Weather Statement	FWD	Fannin	37 min
May 20, 3:25 PM CDT	Special Weather Statement	FWD	Tarrant	35 min
May 20, 3:45 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	30 min
May 20, 3:47 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Leon	58 min
May 20, 3:59 PM CDT	Special Weather Statement	FWD	Hunt, Rockwall	31 min
May 20, 4:03 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton	27 min
May 20, 4:12 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	48 min
May 20, 4:28 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Fannin, Hunt	62 min
May 20, 4:40 PM CDT	Areal Flood Advisory	FWD	Collin, Fannin, Grayson, Hunt	3 hr
May 20, 4:52 PM CDT	Areal Flood Advisory	FWD	Dallas, Tarrant	3 hr
May 20, 4:52 PM CDT	Special Weather Statement	FWD	Coryell	23 min
May 20, 5:13 PM CDT	Areal Flood Advisory	FWD	Leon	3 hr
May 20, 5:18 PM CDT	Special Weather Statement	FWD	Freestone, Limestone	27 min
May 20, 5:24 PM CDT	Severe Thunderstorm Warning	FWD	Hunt, Rains, Van Zandt	66 min
May 20, 5:26 PM CDT	Special Weather Statement	FWD	McLennan	34 min
May 20, 5:40 PM CDT	Flash Flood Warning	FWD	Leon	6 hr
May 20, 5:45 PM CDT	Severe Thunderstorm Warning	FWD	Freestone, Limestone	60 min
May 20, 5:54 PM CDT	Severe Thunderstorm Warning	FWD	Leon	66 min
May 20, 5:56 PM CDT	Special Weather Statement	FWD	McLennan	34 min
May 20, 5:57 PM CDT	Special Weather Statement	FWD	Delta, Fannin, Hopkins, Lamar	33 min
May 20, 6:02 PM CDT	Severe Thunderstorm Warning	FWD	Kaufman	58 min
May 20, 6:08 PM CDT	Areal Flood Advisory	FWD	Anderson, Freestone, Limestone	3 hr
May 20, 6:24 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Navarro	52 min
May 20, 6:26 PM CDT	Areal Flood Advisory	FWD	Delta, Hopkins, Hunt, Lamar, Rains	3 hr
May 20, 6:35 PM CDT	Special Weather Statement	FWD	Falls	25 min
May 20, 6:48 PM CDT	Severe Thunderstorm Warning	FWD	Henderson, Kaufman	57 min

Nearby

Flash Flood Warnings in Texas, 2011 Every flash flood warning in 2011

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.