Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 6, NWS San Angelo, TX

April 10, 2017Kimble County, Mason County, Texas

NWS San Angelo, TX issued this flash flood warning at Apr 10, 2017, 9:29 PM CDT for Kimble County, Mason 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 outline as issued.

The facts

Issued: Apr 10, 2017, 9:29 PM CDT (02:29 UTC)
Expired: Apr 11, 2017, 12:30 AM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Flood severity: None

Counties Kimble County, TX, Mason County, TX

The radar

The San Angelo radar (KSJT), 130 km from the middle of the area, began a volume at 02:28 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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

Del Rio, TX (KDLF), launched 00:00Z, 2.5 hours before the alert went out and 201 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: 2462 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1270 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -68 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -3.9

Open this sounding in Storm Lab

The text

As transmitted.

071 
WGUS54 KSJT 110229
FFWSJT
TXC267-319-110530-
/O.NEW.KSJT.FF.W.0006.170411T0229Z-170411T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Angelo TX
929 PM CDT MON APR 10 2017

The National Weather Service in San Angelo has issued a

* Flash Flood Warning for...
  Northeastern Kimble County in west central Texas...
  Mason County in west central Texas...

* Until 1230 AM CDT

* At 924 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain along a band of thunderstorms from just northeast of 
  Junction to Mason to Castell and Pontotoc. Radar has estimated 
  over 3 inches earlier along this band from earlier storms...and as 
  additional storms continue to move east along the tracks of 
  previous storms, an additional 3 inches is likely. This will 
  produce flash flooding. 

* Some locations that will experience flooding include...
  Mason, Pontotoc, Loyal Valley, London, Streeter, The Intersection
  Of Ranch Road 385 And Ranch Road 1871, Us-87 Near The Mason-
  Gillespie County Line, The Intersection Of US-
  377 And Ranch Road 385, Koockville and The Intersection Of US-
  87 And Ranch Road 783.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3050 9974 3071 9973 3071 9948 3092 9916
      3092 9896 3050 9897

$$

04

1 follow-up statement

572 
WGUS74 KSJT 110339
FFSSJT

Flash Flood Statement
National Weather Service San Angelo TX
1039 PM CDT MON APR 10 2017

TXC267-319-110530-
/O.CON.KSJT.FF.W.0006.000000T0000Z-170411T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kimble TX-Mason TX-
1039 PM CDT MON APR 10 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR
NORTHEASTERN KIMBLE AND MASON COUNTIES...


Radar has estimated at 1030 PM...4 to 7 inches of rainfall has 
fallen in the last 3 hours...east and southeast of Mason. Motorists 
on roadway 29 east of Mason and on highway 87...from southeast of 
Mason to Loyal Valley should look out for flooded roadways! Turn 
around, Do not drown.  4.71 inches was reported by the LCRA gage in 
the last 3 hours on Willow Creek east of Mason...and 3.18 inches on
Comanche Creek southeast of Mason.

Flash flooding is expected to begin shortly.

Some locations that will experience flooding include...
Mason, Pontotoc, Loyal Valley, London, Streeter, The Intersection Of
Ranch Road 385 And Ranch Road 1871, Us-87 Near The Mason-
Gillespie County Line, The Intersection Of US-
377 And Ranch Road 385, Koockville and The Intersection Of US-
87 And Ranch Road 783.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3050 9974 3071 9973 3071 9948 3092 9916
      3092 9896 3050 9897

$$

04

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 San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Apr 10, 6:29 PM CDT, 3 hours earlier.

Area forecast discussion, Apr 10, 6:29 PM CDT, 3 hours before

Area Forecast Discussion
National Weather Service San Angelo TX
629 PM CDT Mon Apr 10 2017

.AVIATION...
/00Z TAFS/

Look for VFR conditions to dominate most of West Central Texas for
the next 24 hours. A cold front will stall along or just south of
our Interstate 10 corridor tonight. Stratus will then develop
near sunrise, across mainly our southern counties. Plus, showers
and thunderstorms are possible, mainly along and near this front.
By tomorrow afternoon, expect VFR conditions across all of West
Central Texas.

&&

.PREV DISCUSSION... /issued 307 PM CDT Mon Apr 10 2017/

SHORT TERM...
(Tonight and Tuesday)

A cold front is moving south through the forecast area. Currently it
extends from San Saba county through northwest Menard County to
northwest Crockett County. Isolated to scattered rain showers with
very isolated heavy showers were mostly in southern Tom Green
County along and within 50 miles north of the front.

The cold front will slow down as it moves southeast through the
forecast area and there is a chance for heavy rain in San Saba,
Mason and Kimble counties this evening and overnight...a Flash Flood
Watch is currently posted for those counties until 7AM CDT Tuesday.
A few storms could reach severe levels over southeastern counties
later today, therefore the Storm Prediction Center has issued a
Severe Thunderstorm Watch for San Saba, McCullough, Menard, Mason,
Schleicher, Sutton and Kimble Counties until 11PM CDT tonight.

Expect cooler temperatures on Tuesday with lows near 50 degrees in
the Big Country to near 60 from Ozona to Junction. High temperatures
on Tuesday will be in the low to mid 70s with some cloudiness
lingering. Chances for rain of 30 to 50 percent continues through
mid-Tuesday across southern and especially southeastern most
counties. Rain chances are 20 percent or less from San Angelo
northward.

22

LONG TERM...
(Tuesday night through Sunday)

Quieter weather is expected Tuesday night into Wednesday as weak
upper level ridging develops across West Central Texas ahead of the
next approaching upper level shortwave trough. Overnight lows will
mainly be in the mid 50s to near 60 degrees, with high temperatures
on Wednesday near seasonal normals, in the mid to upper 70s.

The next upper level shortwave trough will track across the South
Plains/Texas Panhandle Wednesday night into Thursday. At this point,
the best chance for showers and thunderstorms looks to be across our
western and northern counties, closest to the track of the
aforementioned shortwave trough. Current rain chances range from
likely across our northwest counties, to slight chance across our
southeast counties. Highs on Thursday will be near seasonal normals,
in the mid to upper 70s. Drier conditions are anticipated Friday and
Saturday as weak upper level ridging develops across the forecast
area.

The next chance for showers and thunderstorms looks to be late next
weekend into the first part of next week as the next upper level
storm system approaches from the west. For now, PoPs were kept in
the slight chance/chance category given the uncertainty this far
out.

Daniels

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 53  74  58  77 /  20  10  10  20
San Angelo 	 57  74  59  79 /  20  20  20  20
Junction 	 60  74  60  78 /  60  40  10  20
Brownwood 	 57  73  58  77 /  40  20  10  20
Sweetwater 	 52  72  58  76 /  10  10  10  20
Ozona      	 58  73  60  75 /  30  30  20  20

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through Tuesday morning for Kimble-Mason-San
Saba.

&&

Hazardous weather outlook, Apr 10, 2:59 PM CDT, 6 hours 30 minutes before

Hazardous Weather Outlook
National Weather Service San Angelo TX
259 PM CDT Mon Apr 10 2017

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-112000-
Fisher-Nolan-Sterling-Coke-Runnels-Irion-Tom Green-Concho-
Crockett-Schleicher-Sutton-Haskell-Throckmorton-Jones-Shackelford-
Taylor-Callahan-Coleman-Brown-McCulloch-San Saba-Menard-Kimble-
Mason-
259 PM CDT Mon Apr 10 2017

This Hazardous Weather Outlook is for portions of west central
Texas.

.DAY ONE...This Afternoon and Tonight

Thunderstorms are possible this afternoon into tonight. Some of
the storms may become severe this afternoon and evening, mainly
south and east of a Brownwood to Eldorado to Sonora line. The main
hazards will be dangerous lightning, large hail, and damaging
winds. In addition, locally heavy rainfall may caused localized
flooding, especially in urban areas and poor drainage places.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

An isolated severe thunderstorm is possible west of a line from
Rotan to Mertzon to Ozona Wednesday night into Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon.

In the hours before

Special weather statement, Apr 10, 7:41 PM CDT, 1 hour 48 minutes before

Special Weather Statement
National Weather Service San Angelo TX
741 PM CDT MON APR 10 2017

TXZ076-110130-
Crockett TX-
741 PM CDT MON APR 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CROCKETT COUNTY UNTIL 830
PM CDT...

At 740 PM CDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Sheffield. this storm was nearly stationary.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This storm will remain over mainly rural areas of central Crockett
County, including the following locations: Ft Lancaster and The
Intersection Of I-10 And Highway 290.

LAT...LON 3049 10169 3050 10168 3052 10168 3055 10165
      3063 10166 3065 10169 3066 10172 3065 10177
      3066 10177 3074 10153 3050 10145
TIME...MOT...LOC 0040Z 253DEG 4KT 3060 10167

AJW

Special weather statement, Apr 10, 7:47 PM CDT, 1 hour 42 minutes before

Special Weather Statement
National Weather Service San Angelo TX
747 PM CDT MON APR 10 2017

TXZ170-110130-
Mason TX-
747 PM CDT MON APR 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL MASON COUNTY UNTIL
830 PM CDT...

At 746 PM CDT, Doppler radar was tracking a strong thunderstorm 2
miles southeast of Mason, moving east at 15 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

This storm will remain over mainly rural areas of east central Mason
County, including the following locations: The Intersection Of US-87
And Ranch Road 783.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
west central Texas.

LAT...LON 3064 9928 3071 9924 3083 9897 3076 9896
      3063 9897
TIME...MOT...LOC 0046Z 248DEG 14KT 3069 9920

04

Special weather statement, Apr 10, 8:06 PM CDT, 1 hour 23 minutes before

Special Weather Statement
National Weather Service San Angelo TX
806 PM CDT MON APR 10 2017

TXZ155-170-110145-
Mason TX-San Saba TX-
806 PM CDT MON APR 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MASON AND
SOUTHWESTERN SAN SABA COUNTIES UNTIL 845 PM CDT...

At 805 PM CDT, Doppler radar was tracking a strong thunderstorm near
Fredonia, or 11 miles northeast of Mason, moving northeast at 15 mph.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm.

This strong thunderstorm will be near...
  Pontotoc around 835 PM CDT.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
west central Texas.

LAT...LON 3092 9883 3092 9897 3077 9897 3081 9919
      3103 9904 3094 9881
TIME...MOT...LOC 0105Z 220DEG 11KT 3086 9908

04

Special weather statement, Apr 10, 8:48 PM CDT, 41 minutes before

Special Weather Statement
National Weather Service San Angelo TX
848 PM CDT MON APR 10 2017

TXZ155-170-110230-
Mason TX-San Saba TX-
848 PM CDT MON APR 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SAN SABA COUNTY UNTIL
930 PM CDT...

At 847 PM CDT, Doppler radar was tracking a strong thunderstorm near
Field Creek, or 17 miles northwest of Llano, moving east at 20 mph
along the southern San Saba County Line.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm along with heavy rainfalls up to 2 inches.

This strong thunderstorm will be near...
  Cherokee around 925 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A severe thunderstorm watch remains in effect until 1100 PM CDT for
west central Texas.

LAT...LON 3092 9850 3092 9896 3082 9897 3082 9899
      3100 9902 3111 9847 3108 9846 3106 9849
      3104 9846
TIME...MOT...LOC 0147Z 263DEG 16KT 3093 9889

04

Local storm report, Apr 10, 9:08 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
908 PM CDT MON APR 10 2017

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

0905 PM     HAIL             6 E MASON               30.75N  99.13W
04/10/2017  E1.50 INCH       MASON              TX   LAW ENFORCEMENT

&&

EVENT NUMBER SJT1700054

HUBER

Special weather statement, Apr 10, 9:18 PM CDT, 11 minutes before

Special Weather Statement
National Weather Service San Angelo TX
918 PM CDT MON APR 10 2017

TXZ169-110245-
Kimble TX-
918 PM CDT MON APR 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KIMBLE COUNTY UNTIL
945 PM CDT...

At 918 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles southwest of London, or 12 miles northeast of Junction, moving
east at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm. Heavy rainfall of 1 to 2 inches is also possible.

This strong thunderstorm will be near...
  London around 925 PM CDT.

Other locations impacted by this storm include The Intersection Of
US-
377 And Ranch Road 385 and The Intersection Of Ranch Road 385 And
Ranch Road 1871.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
west central Texas.

LAT...LON 3056 9975 3071 9973 3071 9949 3052 9949
TIME...MOT...LOC 0218Z 269DEG 12KT 3060 9961

04

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:41 PM CDT	Special Weather Statement	SJT	Crockett	49 min
Apr 10, 7:47 PM CDT	Special Weather Statement	SJT	Mason	43 min
Apr 10, 7:54 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	66 min
Apr 10, 8:06 PM CDT	Special Weather Statement	SJT	Mason	39 min
Apr 10, 8:11 PM CDT	Severe Thunderstorm Warning	SJT	Mason	49 min
Apr 10, 8:24 PM CDT	Areal Flood Advisory	SJT	Mason	111 min
Apr 10, 8:48 PM CDT	Special Weather Statement	SJT	San Saba	42 min
Apr 10, 8:56 PM CDT	Severe Thunderstorm Warning	SJT	Mason	49 min
Apr 10, 8:59 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	61 min
Apr 10, 9:11 PM CDT	Flash Flood Warning	SJT	Crockett	5 hr
Apr 10, 9:18 PM CDT	Special Weather Statement	SJT	Kimble	27 min
Apr 10, 9:46 PM CDT	Special Weather Statement	SJT	Mason	44 min
Apr 10, 9:59 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	46 min
Apr 10, 10:12 PM CDT	Severe Thunderstorm Warning	SJT	Mason	63 min
Apr 10, 10:51 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	38 min
Apr 10, 10:55 PM CDT	Special Weather Statement	SJT	McCulloch	20 min
Apr 10, 11:16 PM CDT	Severe Thunderstorm Warning	SJT	Mason	59 min
Apr 11, 11:43 AM CDT	Special Weather Statement	SJT	Menard	47 min
Apr 11, 12:08 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, McCulloch, Mason, Menard	52 min
Apr 11, 12:55 PM CDT	Special Weather Statement	SJT	Mason	50 min

Nearby

Flash Flood Warnings in Texas, 2017 Every flash flood warning in 2017

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.