Alert archive / Texas / Flash Flood Warnings in 2013

Flash Flood Warning 12, NWS Fort Worth, TX

September 20, 2013Hill County, Limestone County, McLennan County, Texas

NWS Fort Worth, TX issued this flash flood warning at Sep 20, 2013, 9:43 AM CDT for Hill County, Limestone County, McLennan County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 20, 2013, 9:43 AM CDT (14:43 UTC)
Expired: Sep 20, 2013, 12:45 PM CDT
In force: 3 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

Counties Hill County, TX, Limestone County, TX, McLennan County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 102 km from the middle of the area, began a volume at 14:45 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 2.7 hours before the alert went out and 130 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: 107 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

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 Sep 20, 7:43 AM CDT, 2 hours earlier.

Area forecast discussion, Sep 20, 7:43 AM CDT, 2 hours before

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Hazardous weather outlook, Sep 20, 4:48 AM CDT, 4 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
448 AM CDT FRI SEP 20 2013

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211145-
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-
448 AM CDT FRI SEP 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A FLASH FLOOD WATCH IS IN EFFECT ALONG AND SOUTH OF A LINE FROM
GOLDTHWAITE TO ATHENS. PERIODS OF MODERATE TO HEAVY RAINFALL WILL
OCCUR ACROSS THE REGION THROUGH TONIGHT. LOCALIZED FLOODING IN LOW
LYING AREAS IS POSSIBLE...EVEN IN AREAS OUTSIDE OF THE FLASH FLOOD
WATCH. CLOUD TO GROUND LIGHTNING MAY ACCOMPANY ISOLATED
THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
RAIN WILL LINGER INTO SATURDAY SOUTH OF A GOLDTHWAITE TO CANTON LINE
AND ISOLATED THUNDERSTORMS ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...
VERY LIMITED SPOTTER ACTIVATION MAY BE REQUESTED FOR FLOOD REPORTS
WHERE HEAVIER RAINFALL OCCURS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 7:53 PM CDT	Special Weather Statement	FWD	Ellis	37 min
Sep 19, 9:27 PM CDT	Areal Flood Advisory	FWD	Collin, Dallas, Denton, Tarrant	2 hr
Sep 20, 2:41 AM CDT	Areal Flood Advisory	FWD	Coryell, Lampasas	4 hr
Sep 20, 4:00 AM CDT	Flash Flood Watch	FWD	Anderson, Bell, Bosque, Coryell, Falls, Freestone and 11 more	17 hr
Sep 20, 5:56 AM CDT	Flash Flood Warning	FWD	Bosque	2 hr
Sep 20, 6:26 AM CDT	Areal Flood Advisory	FWD	Dallas, Ellis, Johnson, Tarrant	3 hr
Sep 20, 8:41 AM CDT	Areal Flood Advisory	FWD	Henderson, Kaufman, Navarro, Van Zandt	3 hr
Sep 20, 9:16 AM CDT	Flash Flood Warning	FWD	Navarro	3 hr
Sep 20, 9:31 AM CDT	Areal Flood Advisory	FWD	Dallas, Ellis, Johnson, Tarrant	3 hr
Sep 20, 11:17 AM CDT	Areal Flood Advisory	FWD	Anderson, Freestone, Henderson	3 hr
Sep 20, 12:11 PM CDT	Areal Flood Advisory	FWD	Bell, Falls, Limestone, McLennan	3 hr
Sep 20, 12:15 PM CDT	Areal Flood Advisory	FWD	Navarro	3 hr
Sep 20, 12:45 PM CDT	Areal Flood Advisory	FWD	Hill, Limestone, McLennan	3 hr
Sep 20, 1:19 PM CDT	Areal Flood Advisory	FWD	Anderson, Freestone	4 hr
Sep 20, 1:41 PM CDT	Areal Flood Advisory	FWD	Milam, Robertson	4 hr
Sep 20, 2:00 PM CDT	Areal Flood Advisory	FWD	Anderson, Leon	4 hr
Sep 20, 3:58 PM CDT	Areal Flood Advisory	FWD	Bell, Coryell, Falls, Limestone, McLennan	3 hr

Nearby

Flash Flood Warnings in Texas, 2013 Every flash flood warning in 2013

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; radar from the NEXRAD Level II archive.