Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 68, NWS Houston/Galveston, TX

April 27, 20155 counties in Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 27, 2015, 4:40 AM CDT for 5 counties in Texas. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 27, 2015, 4:40 AM CDT (09:40 UTC)
Expired: Apr 27, 2015, 5:15 AM CDT
In force: 35 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

Counties Houston County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 160 km from the middle of the area, began a volume at 09:44 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.

Issued	Product	Office	Lasted
Apr 27, 1:27 AM CDT	Tornado Watch	SPC	6 hr

What forecasters said that day

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

NWS Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 27, 3:36 AM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Apr 27, 3:36 AM CDT, 1 hour 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
336 AM CDT MON APR 27 2015

.DISCUSSION...
AT 3 AM...A LINEAR MCS IS JUST ENTERING THE CWA. IT APPEARS THAT
THIS FEATURE WILL MOVE THROUGH THE ENTIRE CWA BEFORE 12Z AND MAY
PRODUCE SOME WIND DAMAGE AND HAIL BEFORE EXITING SE TX. THINGS GET
MORE COMPLICATED FOR THIS AFTN. SUBSIDENCE WILL LIKELY DOMINATE IN
THE WAKE OF THIS SYSTEM THROUGH THE EARLY AFTN...BUT FCST SOUNDINGS
SHOW A GREAT DEAL OF INSTABILITY FOR THE AFTN. NOT SURE HOW THINGS
WILL PLAY OUT BUT WILL KEEP HIGH END CHANCE POPS FOR NOW AND SEE
IF CONVECTION CAN REFIRE. WILL ALSO MAINTAIN CHANCE OF SEVERE FOR
THE AFTERNOON CONVECTION AS COLDER AIR ALOFT WOULD SUPPORT A HAIL
THREAT. WILL BE TWEAKING POPS BEFORE THE MORNING ZFP IS ISSUED.

A COLD FRONT WILL CROSS SE TX TONIGHT AND THIS FEATURE COULD ALSO
SERVE AS A FOCUS FOR ADDITIONAL SHRA/TSRA. THE FRONT WILL USHER IN
COOLER TEMPS AND BRISK NORTHWEST WINDS. MAV GUIDANCE IS BULLISH
WITH WINDS AND A WIND ADVISORY MAY BE REQUIRED FOR THE COASTAL
COUNTIES LATE TONIGHT INTO EARLY TUESDAY.

WRAP AROUND CLOUDS AND SOME LIGHT SHOWERS WILL BE POSSIBLE ON
TUESDAY AS THE UPPER LEVEL FEATURE GRADUALLY SHIFTS EAST. SUNSHINE
SHOULD RETURN ON WEDNESDAY AND CONTINUE THROUGH NEXT WEEKEND. DEW
PTS WILL BE IN THE LOWER 50S SO HUMIDITY LEVELS WILL BE AS
PLEASANT AS THE TEMPERATURES. AFTER ALL THE ACTIVE WEATHER OVER
THE PAST COUPLE OF WEEKS...IT'LL BE NICE TO GET A 5-6 DAY STRETCH
OF NICE WEATHER. MOISTURE RETURN WON'T REALLY GET GOING UNTIL
EARLY NEXT WEEK SO PULLED RAIN CHANCES FROM NEXT WEEKEND. 43

&&

.MARINE...
MODERATE ONSHORE WINDS WILL AFFECT THE GULF WATERS EARLY THIS
MORNING AS INFLOW INCREASES TOWARD A LINE OF THUNDERSTORMS MOVING
THROUGH SOUTHEAST TEXAS. THESE WILL SLOWLY DIMINISH LATER TODAY...
ALTHOUGH GUSTY WINDS MAY ACCOMPANY THUNDERSTORMS THROUGHOUT THE DAY.
A COLD FRONT IS EXPECTED TO MOVE OFF THE COAST EARLY TUESDAY MORNING
WITH WINDS BEHIND THE FRONT INCREASING TO ADVISORY CRITERIA ON
TUESDAY AT LEAST OVER THE GULF WATERS. THE STRONG OFFSHORE WINDS
WILL LEAD TO WATER LEVELS FALLING TO BETWEEN 1 AND 1.5 FEET BELOW
NORMAL IN THE WESTERN SHORES OF THE BAYS AND IN THE HOUSTON SHIP
CHANNEL. THE WINDS WILL THEN DIMINISH TUESDAY NIGHT AND WEDNESDAY
WITH HIGH PRESSURE BUILDING OVERHEAD.

40

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      80  60  67  49  72 /  70  40  20  10   0
HOUSTON (IAH)              82  63  70  49  74 /  80  40  20  10   0
GALVESTON (GLS)            78  69  73  56  71 /  80  20  10  10   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.
&&

In the hours before

Special weather statement, Apr 27, 2:42 AM CDT, 1 hour 58 minutes before

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Special weather statement, Apr 27, 3:11 AM CDT, 1 hour 29 minutes before

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Local storm report, Apr 27, 3:50 AM CDT, 50 minutes before

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Local storm report, Apr 27, 4:24 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
424 AM CDT MON APR 27 2015

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

0355 AM     TSTM WND DMG     HEMPSTEAD               30.09N  96.08W
04/27/2015                   WALLER             TX   LAW ENFORCEMENT

            TREES DOWN ALONG HIGHWAY 6 AND IN HEMPSTEAD.

&&

EVENT NUMBER HGX1500154

BLOOD

Local storm report, Apr 27, 4:31 AM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
431 AM CDT MON APR 27 2015

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

0340 AM     TSTM WND DMG     BRENHAM                 30.16N  96.40W
04/27/2015                   WASHINGTON         TX   FIRE DEPT/RESCUE

            TREES DOWN IN BRENHAM.

&&

EVENT NUMBER HGX1500155

BLOOD

Local storm report, Apr 27, 4:39 AM CDT, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 7:15 PM CDT	Special Marine Warning	HGX		90 min
Apr 26, 7:24 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Galveston, Harris	23 min
Apr 27, 2:40 AM CDT	River Flood Warning	HGX	Brazoria, Fort Bend, Wharton	61 hr
Apr 27, 2:42 AM CDT	Special Weather Statement	HGX	Austin, Brazos, Burleson, Colorado, Grimes, Washington	78 min
Apr 27, 3:11 AM CDT	Special Weather Statement	HGX	Grimes, Houston, Madison, Walker	64 min
Apr 27, 3:21 AM CDT	Severe Thunderstorm Warning	HGX	Austin, Brazos, Burleson, Colorado, Grimes, Madison and 2 more	24 min
Apr 27, 3:44 AM CDT	Severe Thunderstorm Warning	HGX	Houston	31 min
Apr 27, 3:52 AM CDT	Severe Thunderstorm Warning	HGX	Austin, Brazos, Burleson, Colorado, Fort Bend, Grimes and 6 more	38 min
Apr 27, 3:59 AM CDT	Tornado Warning	HGX	Grimes, Montgomery, Walker	31 min
Apr 27, 4:17 AM CDT	Areal Flood Advisory	HGX	Brazos, Grimes, Madison, Walker	118 min
Apr 27, 4:17 AM CDT	Severe Thunderstorm Warning	HGX	Houston	13 min
Apr 27, 4:27 AM CDT	Severe Thunderstorm Warning	HGX	Grimes, Harris, Liberty, Montgomery, Polk, San Jacinto and 1 more	78 min
Apr 27, 4:33 AM CDT	Severe Thunderstorm Warning	HGX	Houston, Trinity	27 min
Apr 27, 4:36 AM CDT	Tornado Warning	HGX	Polk, San Jacinto, Trinity, Walker	39 min
Apr 27, 4:46 AM CDT	Areal Flood Advisory	HGX	Houston, Madison, Polk, San Jacinto, Trinity, Walker	119 min
Apr 27, 4:52 AM CDT	Tornado Warning	HGX	Liberty, Polk, San Jacinto	23 min
Apr 27, 5:24 AM CDT	Severe Thunderstorm Warning	HGX	Polk	21 min
Apr 27, 5:40 AM CDT	Special Weather Statement	HGX	Brazos, Grimes, Houston, Madison, Montgomery, Polk and 3 more	65 min
Apr 27, 5:42 AM CDT	Severe Thunderstorm Warning	HGX	Chambers, Harris, Liberty	63 min
Apr 27, 5:48 AM CDT	Special Weather Statement	HGX	Liberty	42 min
Apr 27, 6:45 AM CDT	Special Weather Statement	HGX	Liberty	45 min
Apr 27, 1:56 PM CDT	Special Weather Statement	HGX	Liberty	34 min
Apr 27, 2:44 PM CDT	Special Marine Warning	HGX		46 min
Apr 27, 3:29 PM CDT	Special Marine Warning	HGX		61 min
Apr 27, 3:31 PM CDT	Special Marine Warning	HGX		44 min
Apr 27, 3:41 PM CDT	Small Craft Advisory	HGX		6 hr
Apr 27, 3:41 PM CDT	Small Craft Advisory	HGX		39 hr
Apr 27, 4:19 PM CDT	Special Marine Warning	HGX		56 min
Apr 27, 4:47 PM CDT	Special Weather Statement	HGX	Chambers	43 min
Apr 27, 5:13 PM CDT	Special Weather Statement	HGX	Grimes	47 min
Apr 27, 5:55 PM CDT	Special Weather Statement	HGX	Grimes, Washington	35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.