Alert archive / Texas / Flash Flood Watches in 2016

Flash Flood Watch 4, NWS San Angelo, TX

May 31, 201624 counties in Texas

NWS San Angelo, TX issued this flash flood watch at May 31, 2016, 10:59 AM CDT for 24 counties in Texas. It took effect at May 31, 2016, 12:00 PM CDT. It was in force for 3 days.

The area

The counties it named.

The facts

Issued
May 31, 2016, 10:59 AM CDT (15:59 UTC)
In effect from
May 31, 2016, 12:00 PM CDT
Expired
Jun 3, 2016, 1:00 PM CDT
In force
3 days
Issued by
NWS San Angelo, TX
Flood severity
None
All 24 counties

Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Fisher County, TX, Haskell County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 63 km from the middle of the area, began a volume at 16:00 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

Midland Regional, TX (KMAF), launched 12:00Z, 4.0 hours before the alert went out and 213 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-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 2016-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 604 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2016-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
604 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1014 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
26 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 watch 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 watch went out at May 31, 6:36 AM CDT, 4 hours 23 minutes earlier.

Area forecast discussion, May 31, 6:36 AM CDT, 4 hours 23 minutes before
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Hazardous weather outlook, May 31, 4:56 AM CDT, 6 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
456 AM CDT TUE MAY 31 2016

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-011000-
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-
456 AM CDT TUE MAY 31 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE ACROSS WEST CENTRAL TEXAS TODAY AND
TONIGHT. A FEW STORMS MAY BE SEVERE...MAINLY DURING THE AFTERNOON
AND EVENING HOURS. THE MAIN HAZARDS WILL BE LARGE HAIL...DAMAGING
WINDS AND DANGEROUS LIGHTNING. ALSO...THE STORMS WILL PRODUCE VERY
HEAVY RAINFALL WHICH MAY RESULT IN LOCALIZE FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS ARE POSSIBLE ACROSS WEST CENTRAL TEXAS WEDNESDAY THROUGH
SATURDAY. A FEW STORMS MAY BECOME SEVERE WEDNESDAY ALONG AND SOUTH
OF INTERSTATE 10. THE PRIMARY HAZARDS WILL BE LARGE HAIL AND
DAMAGING WINDS. HEAVY RAINFALL AND THE THREAT FOR FLASH FLOODING
WILL ALSO BE A CONCERN...ESPECIALLY WEDNESDAY THROUGH THURSDAY
WHEN SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BE MORE WIDESPREAD
ACROSS THE AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, May 31, 10:17 AM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1017 AM CDT TUE MAY 31 2016

TXZ170-311600-
MASON TX-
1017 AM CDT TUE MAY 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN MASON COUNTY UNTIL 1100
AM CDT...

AT 1016 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR CASTELL...OR
10 MILES EAST OF MASON...MOVING NORTHEAST AT 30 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN MASON
COUNTY...INCLUDING THE INTERSECTION OF US-87 AND RANCH ROAD 783.

LAT...LON 3074 9930 3092 9897 3058 9896 3052 9920
TIME...MOT...LOC 1516Z 249DEG 36KT 3073 9906
Special weather statement, May 31, 10:54 AM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1054 AM CDT TUE MAY 31 2016

TXZ073-154-168-311645-
MCCULLOCH TX-CONCHO TX-MENARD TX-
1054 AM CDT TUE MAY 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MENARD...SOUTHEASTERN
CONCHO AND WEST CENTRAL MCCULLOCH COUNTIES UNTIL 1145 AM CDT...

AT 1053 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 9 MILES NORTHEAST
OF FORT MCKAVETT...OR 12 MILES WEST OF MENARD...MOVING NORTHEAST AT
15 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF NORTHERN MENARD...
SOUTHEASTERN CONCHO AND WEST CENTRAL MCCULLOCH COUNTIES...INCLUDING
THE FOLLOWING LOCATIONS: LIVE OAK...US-83 NEAR THE MENARD-CONCHO
COUNTY LINE AND CAMP SOL MAYER.

LAT...LON 3074 10012 3109 10012 3120 9983 3130 9962
      3108 9948
TIME...MOT...LOC 1553Z 230DEG 14KT 3093 10000
Special weather statement, May 31, 10:58 AM CDT, 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1058 AM CDT TUE MAY 31 2016

TXZ155-170-311700-
SAN SABA TX-MASON TX-
1058 AM CDT TUE MAY 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MASON AND SOUTHERN
SAN SABA COUNTIES UNTIL NOON CDT...

AT 1058 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR CASTELL...OR
12 MILES EAST 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 1130 AM CDT.
  CHEROKEE AROUND 1200 PM CDT.

LAT...LON 3092 9844 3092 9896 3069 9896 3065 9906
      3076 9920 3079 9928 3094 9921 3094 9909
      3100 9909 3111 9892 3099 9844 3096 9845
      3094 9841 3093 9842
TIME...MOT...LOC 1558Z 230DEG 14KT 3076 9902

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:41 PM CDTSpecial Weather StatementSJTCallahan19 min
May 31, 10:17 AM CDTSpecial Weather StatementSJTMason43 min
May 31, 10:54 AM CDTSpecial Weather StatementSJTMenard51 min
May 31, 10:58 AM CDTSpecial Weather StatementSJTLlano62 min
May 31, 11:14 AM CDTSevere Thunderstorm WarningSJTConcho, McCulloch, Menard46 min
May 31, 11:26 AM CDTFlash Flood WarningSJTMason3 hr
May 31, 12:12 PM CDTAreal Flood AdvisorySJTMenard3 hr
May 31, 12:42 PM CDTAreal Flood AdvisorySJTConcho3 hr
May 31, 2:06 PM CDTAreal Flood AdvisorySJTBrown, McCulloch, San Saba3 hr
May 31, 2:09 PM CDTSevere Thunderstorm WarningSJTKimble51 min
May 31, 2:31 PM CDTAreal Flood AdvisorySJTKimble, Mason3 hr
May 31, 2:59 PM CDTSpecial Weather StatementSJTNolan61 min
May 31, 3:04 PM CDTSpecial Weather StatementSJTCallahan, Taylor56 min
May 31, 4:23 PM CDTSpecial Weather StatementSJTTaylor52 min
May 31, 5:06 PM CDTFlash Flood WarningSJTTaylor3 hr
May 31, 5:30 PM CDTSpecial Weather StatementSJTRunnels60 min
May 31, 5:46 PM CDTAreal Flood AdvisorySJTCoke, Runnels, Tom Green3 hr
May 31, 6:24 PM CDTAreal Flood AdvisorySJTTom Green3 hr

Nearby

Flash Flood Watches in Texas, 2016Every flash flood watch in 2016

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.