Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 13, NWS Houston/Galveston, TX

January 18, 2017Harris County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jan 18, 2017, 5:03 AM CST for Harris County, Texas. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jan 18, 2017, 5:03 AM CST (11:03 UTC)
Expired
Jan 18, 2017, 5:30 AM CST
In force
27 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Harris County, TX

The radar

The Houston radar (KHGX), 40 km from the middle of the area, began a volume at 11:02 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jan 2, 1:39 AM CSTSevere Thunderstorm WatchSPC59 days

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.1 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2017-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 508 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2017-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939587897Sfc1 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
508 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

112 
WFUS54 KHGX 181103
TORHGX
TXC201-181130-
/O.NEW.KHGX.TO.W.0013.170118T1103Z-170118T1130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
503 AM CST WED JAN 18 2017

The National Weather Service in League City has issued a

* Tornado Warning for...
  Southwestern Harris County in southeastern Texas...

* Until 530 AM CST.

* At 502 AM CST, a severe thunderstorm capable of producing a tornado
  was located over Denver Harbor / Port Houston, or over Jacinto
  City, moving northeast at 15 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

* Locations impacted include...
  Galena Park, Jacinto City, Second Ward, Greater Fifth Ward,
  Cloverleaf, Magnolia Park, El Dorado / Oates Prairie, Sheldon,
  Settegast, Clinton Park Tri-Community, Denver Harbor / Port
  Houston, Hunterwood, Northshore, East Houston, Pleasantville Area,
  Harrisburg / Manchester, Houston Gardens, Pecan Park, Lawndale /
  Wayside and East Little York / Homestead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
League City.

&&

LAT...LON 2971 9528 2975 9533 2995 9526 2986 9510
TIME...MOT...LOC 1102Z 219DEG 14KT 2977 9528 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

40
2 follow-up statements
825 
WWUS54 KHGX 181110
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
510 AM CST WED JAN 18 2017

TXC201-181130-
/O.CON.KHGX.TO.W.0013.000000T0000Z-170118T1130Z/
Harris TX-
510 AM CST WED JAN 18 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 AM CST FOR EAST
CENTRAL HARRIS COUNTY...
    
At 510 AM CST, a severe thunderstorm capable of producing a tornado
was located over El Dorado / Oates Prairie, or over Jacinto City,
moving northeast at 20 mph.

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

Locations impacted include...
Galena Park, Jacinto City, Cloverleaf, Greater Fifth Ward, El Dorado
/ Oates Prairie, Sheldon, Settegast, Hunterwood, Northshore, East
Houston, Pleasantville Area, Clinton Park Tri-Community, Houston
Gardens, Denver Harbor / Port Houston, Kashmere Gardens and East
Little York / Homestead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 2995 9526 2986 9510 2974 9525 2979 9532
TIME...MOT...LOC 1110Z 218DEG 17KT 2980 9526 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

40
266 
WWUS54 KHGX 181124
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
524 AM CST WED JAN 18 2017

TXC201-181134-
/O.EXP.KHGX.TO.W.0013.000000T0000Z-170118T1130Z/
Harris TX-
524 AM CST WED JAN 18 2017

...THE TORNADO WARNING FOR EAST CENTRAL HARRIS COUNTY WILL EXPIRE AT
530 AM CST...
    
The tornadic thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.

LAT...LON 2995 9526 2986 9510 2974 9525 2979 9532
TIME...MOT...LOC 1124Z 219DEG 14KT 2984 9522 

$$

40

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 17, 11:43 PM CSTMarine Dense Fog AdvisoryHGX4 hr
Jan 18, 1:05 AM CSTTornado WarningHGXWharton25 min
Jan 18, 3:02 AM CSTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Harris, Waller, Wharton118 min
Jan 18, 3:51 AM CSTTornado WarningHGXHarris24 min
Jan 18, 4:16 AM CSTAreal Flood AdvisoryHGXFort Bend, Harris, Montgomery59 min
Jan 18, 4:54 AM CSTSpecial Weather StatementHGXHarris51 min
Jan 18, 4:58 AM CSTMarine Dense Fog AdvisoryHGX4 hr
Jan 18, 5:19 AM CSTRiver Flood WarningHGXHarris24 hr
Jan 18, 5:21 AM CSTFlash Flood WarningHGXFort Bend, Harris, Wharton5 hr
Jan 18, 5:47 AM CSTSpecial Weather StatementHGXHarris43 min
Jan 18, 6:36 AM CSTRiver Flood WarningHGXAustin, Fort Bend, Wharton5 days
Jan 18, 7:03 AM CSTRiver Flood WarningHGXHarris8 hr
Jan 18, 7:54 AM CSTRiver Flood WarningHGXHarris24 hr
Jan 18, 7:55 AM CSTRiver Flood WarningHGXHarris11 hr
Jan 18, 8:05 AM CSTRiver Flood WarningHGXMontgomery54 hr
Jan 18, 8:27 AM CSTRiver Flood WarningHGXHarris7 hr
Jan 18, 8:30 AM CSTRiver Flood WarningHGXHarris24 hr
Jan 18, 8:36 AM CSTRiver Flood WarningHGXHarris7 hr
Jan 18, 8:37 AM CSTRiver Flood WarningHGXHarris24 hr
Jan 18, 8:46 AM CSTRiver Flood WarningHGXHarris24 hr
Jan 18, 8:49 AM CSTRiver Flood WarningHGXHarris7 hr
Jan 18, 8:50 AM CSTRiver Flood WarningHGXHarris15 hr
Jan 18, 8:59 AM CSTRiver Flood WarningHGXBrazoria, Fort Bend, Wharton8 days
Jan 18, 8:59 AM CSTRiver Flood WarningHGXBrazoria4 days
Jan 18, 9:37 AM CSTRiver Flood WarningHGXBurleson, Harris, Lee6 days
Jan 18, 10:14 AM CSTAreal Flood WarningHGXFort Bend, Harris, Wharton6 hr
Jan 18, 12:41 PM CSTSpecial Weather StatementHGXLiberty49 min
Jan 18, 2:13 PM CSTRiver Flood WarningHGXHarris30 hr

Nearby

Tornado Warnings in Texas, 2017Every tornado warning in 2017Tornadoes 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.