July 2014: Stalled Front/ Rain Chnaces To End July

[Belmer]

This is indeed becoming a very dangerous flooding situation for folks in NE Harris county. Rainfall rates are falling as much as 3.5-4 inches PER HOUR. Doppler radar has already estimated up to 4 inches of rain has fallen from that storm near Atascocita area. Storm complex is slowly moving southward. If models are correct, mainly HRRR and RPM, could be looking at a huge flooding situation unfolding tonight across SE Harris county as the storm continues to slow down and stall along the coast.
Be aware tonight, mainly if you're east of I-45.

[Rip76]

Yeah it's looking bad out there, as they seem to be slowing down.

[djjordan]

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1133 PM CDT THU JUL 31 2014

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST TEXAS...
NORTH CENTRAL HARRIS COUNTY IN SOUTHEAST TEXAS...

* UNTIL 230 AM CDT

* AT 1129 PM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
HEAVY RAIN FALLING ALONG THE NORTH SIDE OF BELTWAY 8 FROM NEAR THE
TOMBALL PARKWAY TO HIGHWAY 59. HARRIS COUNTY FLOOD WARNING SYSTEM
REPORTS 2.56 INCHES IN THE LAST HOUR NEAR ALDINE AND NORTH HOUSTON.
REPORTS OF HIGH WATER HAVE REPORTED IN THESE AREAS.

TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS ALREADY
OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
HUMBLE...JERSEY VILLAGE...NORTHSIDE / NORTHLINE...GREATER
HEIGHTS...ALDINE...SPRING...NEAR NORTHSIDE HOUSTON...GREATER
GREENSPOINT...KINGWOOD...ACRES HOME...EAST HOUSTON...EASTEX /
JENSEN AREA...LAZYBROOK / TIMBERGROVE...FAIRBANKS / NORTHWEST
CROSSING...BUSH INTERCONTINENTAL AIRPORT...EAST LITTLE YORK /
HOMESTEAD...CENTRAL NORTHWEST...HIDDEN VALLEY...HOUSTON GARDENS AND
LANGWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

[djjordan]

Watching the continuous backbuilding occuring right now from Central Montgomery County to Western Harris County. Flooding is already occuring along the Sam Houston Tollway and Hwy 59. Numerous cars flooded out being reported.

[Rip76]

Starting to look like we may get a little something in the Pearland area.

Question.
Normally (even with a small front), storms like these tend to die out after the sun goes down.
What make a system like this different?

Stronger front/atmospheric conditions?

I haven't seen this much continual lightning in a very very long time.

[Rip76]

Downtown has to be getting hammered right now.

[djjordan]

Absolutely Rip...... looks like the storms downtown are actually intensifying a bit. covers most everyone inside the 610 loop!!!!

[Rip76]

I noticed the reds on radar cranking back up.

Watching those clouds coming in on the NW Beltway area as well.
Along I-10 West as well.

It's tropical storm humid out here.

[BlueJay]

I hope all are well after last night's weather action.

No measurable rain for us last night, although I did enjoy the lightening show!

Ending July 2014 with 2.42 inches of rain for the month.
26.37 inches of precip for the year so far.

Now, it's on to August! (Already!)

[txflagwaver]

No rain here..but the light show was awesome.

[jasons2k]

So, it was a race to the finish. It looked like July was going to come under 2" here at my place, then last night around 10:00 I got a nice storm that lasted for about 30 minutes. I picked-up .81", bringing my July total up to 2.67". It also was the most rain in one day since June 26th.

[srainhoutx]

Morning Update from Jeff...(Note some of the rainfall totals likely occurred after mid night)...I was sound asleep.

Impressive rainfall event unfolded overnight across SE TX with upwards of 5-6.5 inches in some locations.

A slow moving band of thunderstorms ahead of a ill defined frontal boundary coupled with deep tropical moisture produced some impressive short term rainfall rates overnight. Flash flooding occurred in a corridor generally along US 59 from downtown Houston to Lake Livingston. Flooding of low lying areas and roadways continues in and around the north side of metro Houston with some locations still deeply inundated and impassable.

HCFCD Flood Warning gages recorded the following rainfall rates overnight:

Maximum 5 min rate: .72 of an inch (2-yr rainfall)

Maximum 15-min rate: 1.56 inches (10-yr rainfall)

Maximum 1-hr rate: 4.16 inches (50-yr to 100-yr rainfall)

Maximum 3-hr rate: 6.24 inches (50-yr to 100-yr rainfall)

The hardest hit area was in the corridor from Aldine to Humble where maximum rainfall of 6.56 inches was recorded.

Forecast:
Activity has pushed toward the coastal counties and currently extends from Jackson County to Galveston County in a much weakened state compared to earlier. Ill defined frontal boundary is located somewhere between Houston and College Station based on dewpoints. Not sure how worked over the air mass is across the region as much of the area SW of Houston was not overly hard hit and suspect it will not take much to recharge the air mass. Dry air will attempt to move in from the north, but not sure just how far south it will make it. With the boundary in place across the region and daytime heating expect additional development this afternoon especially near the coast and possibly as far inland as I-10.

Boundary will linger and wave back and forth across the coastal areas this weekend so rain chances will remain. Luckily moisture levels are not expected to be as deep as overnight so rainfall rates will likely not be as intense as seen overnight. Still hourly rates of 1-3 inches will be possible under any slow moving strong convection.

[Katdaddy]

Only 0.03" overnight in League City while the deluge was ongoing across the Houston area. Additional development may occur later today.

[tireman4]

We got bombed last night in Humble. I mean the rain was torrential at times. The lightning was as vivid as I have ever seen it. My goodness.

[srainhoutx]

The July Climate Report for NWS Houston/Galveston is out and we did not hit 100F during this past month!

Code: Select all

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
403 PM CDT FRI AUG 1 2014

...JULY 2014 ENDED SLIGHTLY COOLER AND DRIER THAN NORMAL...

A SUM OF THE AVERAGE TEMPERATURE DEPARTURES ACROSS SOUTHEAST TEXAS
SHOWS THAT THE MONTH OF JULY ENDED UP SLIGHTLY COOLER THAN NORMAL.
CONVECTIVE RAINFALL EVENTS BROUGHT A MIX OF DRIER AND WETTER THAN 
NORMAL CONDITIONS...ALTHOUGH ONLY FOUR OF THE CLIMATE SITES RECEIVED 
WETTER THAN NORMAL RAINFALL.

ONE UNUSUAL FACT FOR THE YEAR THROUGH JULY 31ST IS THAT NONE OF THE 
FOUR FIRST-ORDER CLIMATE SITES HAVE YET TO HIT THE 100 DEGREE MARK. 
HOW ODD IS THIS? FOR THE 30-YEAR PERIOD OF 1981 TO 2010...COLLEGE 
STATION NORMALLY REACHES 100 DEGREES BY JULY 21ST WITH THE AVERAGE 
NUMBER OF 100-DEGREE DAYS BEING 5.7 DAYS THROUGH JULY 31ST. THE CITY 
OF HOUSTON NORMALLY EXPERIENCES A 100 DEGREE DATE BY JULY 24TH...WITH 
THE AVERAGE BEING 1.8 THROUGH JULY 31ST.

EVEN THOUGH BELOW NORMAL RAINFALL WAS RECORDED AT MOST OF THE CLIMATE
SITES...HEAVIER RAINFALL FELL OVER COLLEGE STATION...HUNTSVILLE... 
INTERCONTINENTAL AIRPORT...AND LEAGUE CITY. THE AVERAGE RAINFALL 
DEPARTURES FOR THESE SITES RANGED FROM +0.53 TO +4.58 INCHES. DRIEST 
CONDITIONS WERE EXPERIENCED ALONG THE COASTAL AREAS...ESPECIALLY 
BETWEEN SUGAR LAND AND PALACIOS. OVERALL RAINFALL AMOUNTS WERE ENOUGH 
TO EASE MOST OF SOUTHEAST TEXAS OUT OF DROUGHT. HOWEVER...THE JULY 
31ST DROUGHT MONITOR REPORTED ABNORMALLY DRY CONDITIONS ACROSS 
BURLESON...NORTHERN AUSTIN...WESTERN COLORADO...MOST OF JACKSON...AND 
MOST OF MATAGORDA COUNTIES. MODERATE DROUGHT CONDITIONS WERE REPORTED 
NEAR MATAGORDA BAY ACROSS FAR SOUTHERN JACKSON AND WESTERN MATAGORDA 
COUNTIES.

THE FOLLOWING IS A LIST OF SOME HIGH AND LOW EXTREMES RECORDED AT 
THE FIRST- AND SECOND-ORDER CLIMATE SITES. NOTE SOME OF THESE ARE 
THE LAST DATE OF OCCURRENCE FOR EACH SITE. SEE THE TABLE FOLLOWING 
THIS LIST FOR MORE DETAILS.

- WARMEST DAILY AVERAGE TEMPERATURE...88 AT IAH ON THE 28TH
                                      88 AT GLS ON THE 27TH
                                      88 AT PSX ON THE 31ST
- COOLEST DAILY AVERAGE TEMPERATURE...76 AT CLL ON THE 18TH
                                      76 AT UTS ON THE 19TH
- COLDEST DAILY MINIMUM TEMPERATURE...68 AT CXO ON THE 30TH
                                      68 AT UTS ON THE 20TH
- WARMEST DAILY MAXIMUM TEMPERATURE...99 AT IAH ON THE 28TH
- HIGHEST DAILY RAINFALL..............4.55 AT CLL ON THE 17TH

THE FOLLOWING TABLE GIVES INDIVIDUAL SITE TEMPERATURE AND RAINFALL 
EXTREMES FOR THE MONTH MEASURED AT THE FIRST- AND SECOND-ORDER 
CLIMATE STATIONS...


       DAILY MAX    DAILY MIN      DAILY AVERAGE TEMP      MAX RNFALL
SITE   TMP DATES    TMP DATES    MAX DATES    MIN DATES    PCPN DATES

IAH    99   28      72   30**    88   28      79   19      3.97   31
GLS    94   29      75   19      88   27      81   19##    0.70   18
CLL    97   28*     69   20      87   27#     76   18      4.55   17
HOU    97   28      73    6      87   28#     81   19##    0.43   23
CXO    96   28      68   30**    86   28      77   19      0.74&  18
UTS    96   14*     68   20      87   14      76   19##    1.67   17
DWH    96   28*     71    4      87   21      79   19      1.14   31
SGR    98   28      71   11      87   27#     81    6##    0.91   24
LBX    95   29      69   12**    84   29#     80   11##    2.12   20
PSX    93   25*     71    4      88   31#     81   18##    1.00    4
LVJ    97   28      74   19**    87   29#     81   18      1.17   23
HGX    97   28      69    3      87   28      78   18      2.42   23

NOTES...THE LAST DATE OF OCCURRENCE IS NOTED IN THE TABLE. OTHER DATES
THAT TIED ARE AS FOLLOWS...
*  FOR HIGH TEMPERATURES...
   CLL - 9TH...13TH...14TH...AND 27TH
   UTS - 9TH
   DWH - 21ST...25TH...AND 27TH
   PSX - 21ST

** FOR LOW TEMPERATURES...
   IAH - 4TH...6TH...11TH...AND 19TH
   CXO - 6TH AND 11TH
   LBX - 9TH AND 11TH
   LVJ - 2ND...3RD...6TH...9TH...11TH...AND 12TH

#  FOR MAX DAILY AVERAGE TEMPERATURES...
   CLL - 14TH
   HOU - 21ST AND 22ND
   SGR - 20TH AND 21ST
   LBX - 20TH...21ST...AND 22ND
   PSX - 21ST
   LVJ - 21ST AND 28TH

## FOR MIN DAILY AVERAGE TEMPERATURES...
   GLS - 18TH
   HOU - 6TH AND 18TH
   UTS - 18TH
   SGR - 5TH
   LBX - 6TH AND 9TH
   PSX - 6TH AND 10TH

&  FOR MAX RAINFALL
   CXO - 17TH


THE FOLLOWING TABLE LISTS THE MONTHLY TEMPERATURE AND RAINFALL DATA 
FOR FIRST- AND SECOND-ORDER CLIMATE SITES ACROSS SOUTHEAST TEXAS...


                           JULY 2014 DATA

        AVE     AVE     MONTHLY AVE        MONTHLY       YEAR-TO-DATE
SITE    HIGH    LOW     DAILY   DEP     RAIN     DEP     RAIN    DEP

IAH     93.1    74.3    83.7   -0.7     5.40    +1.61   26.65   -1.46
GLS     90.2    79.3    84.8   +0.3     1.08    -2.72   11.30  -15.49
CLL     92.8    73.6    83.2   -1.5     6.72    +4.58   22.36   -0.48
HOU     92.2    75.6    83.9   +0.1     1.26    -3.40   21.08   -8.96
CXO     91.3    71.5    81.4   -1.2     2.91    -0.52   26.05   +0.92
UTS     91.8    73.4    82.6   -1.5     4.40    +1.02   25.62   -0.36
DWH     92.5    74.0    83.2   +1.1     3.42    -0.42   25.77   -1.62
SGR     93.4    74.5    84.0   +0.4     2.68    -1.68   23.80   -3.60
LBX     90.9    72.3    81.6   -0.7     4.21    -0.35   18.37   -9.28
PSX     90.6    77.9    84.3   +0.3     1.75    -3.01    9.46  -15.32
LVJ     92.4    75.7    84.0   +1.0     3.00    -1.71   19.07   -9.68
HGX     91.2    74.7    82.9   +0.9     5.11    +0.53   22.28   -7.31

[Ptarmigan]

The July Climate Report for NWS Houston/Galveston is out and we did not hit 100F during this past month!

Code: Select all

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
403 PM CDT FRI AUG 1 2014

...JULY 2014 ENDED SLIGHTLY COOLER AND DRIER THAN NORMAL...

A SUM OF THE AVERAGE TEMPERATURE DEPARTURES ACROSS SOUTHEAST TEXAS
SHOWS THAT THE MONTH OF JULY ENDED UP SLIGHTLY COOLER THAN NORMAL.
CONVECTIVE RAINFALL EVENTS BROUGHT A MIX OF DRIER AND WETTER THAN 
NORMAL CONDITIONS...ALTHOUGH ONLY FOUR OF THE CLIMATE SITES RECEIVED 
WETTER THAN NORMAL RAINFALL.

ONE UNUSUAL FACT FOR THE YEAR THROUGH JULY 31ST IS THAT NONE OF THE 
FOUR FIRST-ORDER CLIMATE SITES HAVE YET TO HIT THE 100 DEGREE MARK. 
HOW ODD IS THIS? FOR THE 30-YEAR PERIOD OF 1981 TO 2010...COLLEGE 
STATION NORMALLY REACHES 100 DEGREES BY JULY 21ST WITH THE AVERAGE 
NUMBER OF 100-DEGREE DAYS BEING 5.7 DAYS THROUGH JULY 31ST. THE CITY 
OF HOUSTON NORMALLY EXPERIENCES A 100 DEGREE DATE BY JULY 24TH...WITH 
THE AVERAGE BEING 1.8 THROUGH JULY 31ST.

EVEN THOUGH BELOW NORMAL RAINFALL WAS RECORDED AT MOST OF THE CLIMATE
SITES...HEAVIER RAINFALL FELL OVER COLLEGE STATION...HUNTSVILLE... 
INTERCONTINENTAL AIRPORT...AND LEAGUE CITY. THE AVERAGE RAINFALL 
DEPARTURES FOR THESE SITES RANGED FROM +0.53 TO +4.58 INCHES. DRIEST 
CONDITIONS WERE EXPERIENCED ALONG THE COASTAL AREAS...ESPECIALLY 
BETWEEN SUGAR LAND AND PALACIOS. OVERALL RAINFALL AMOUNTS WERE ENOUGH 
TO EASE MOST OF SOUTHEAST TEXAS OUT OF DROUGHT. HOWEVER...THE JULY 
31ST DROUGHT MONITOR REPORTED ABNORMALLY DRY CONDITIONS ACROSS 
BURLESON...NORTHERN AUSTIN...WESTERN COLORADO...MOST OF JACKSON...AND 
MOST OF MATAGORDA COUNTIES. MODERATE DROUGHT CONDITIONS WERE REPORTED 
NEAR MATAGORDA BAY ACROSS FAR SOUTHERN JACKSON AND WESTERN MATAGORDA 
COUNTIES.

THE FOLLOWING IS A LIST OF SOME HIGH AND LOW EXTREMES RECORDED AT 
THE FIRST- AND SECOND-ORDER CLIMATE SITES. NOTE SOME OF THESE ARE 
THE LAST DATE OF OCCURRENCE FOR EACH SITE. SEE THE TABLE FOLLOWING 
THIS LIST FOR MORE DETAILS.

- WARMEST DAILY AVERAGE TEMPERATURE...88 AT IAH ON THE 28TH
                                      88 AT GLS ON THE 27TH
                                      88 AT PSX ON THE 31ST
- COOLEST DAILY AVERAGE TEMPERATURE...76 AT CLL ON THE 18TH
                                      76 AT UTS ON THE 19TH
- COLDEST DAILY MINIMUM TEMPERATURE...68 AT CXO ON THE 30TH
                                      68 AT UTS ON THE 20TH
- WARMEST DAILY MAXIMUM TEMPERATURE...99 AT IAH ON THE 28TH
- HIGHEST DAILY RAINFALL..............4.55 AT CLL ON THE 17TH

THE FOLLOWING TABLE GIVES INDIVIDUAL SITE TEMPERATURE AND RAINFALL 
EXTREMES FOR THE MONTH MEASURED AT THE FIRST- AND SECOND-ORDER 
CLIMATE STATIONS...


       DAILY MAX    DAILY MIN      DAILY AVERAGE TEMP      MAX RNFALL
SITE   TMP DATES    TMP DATES    MAX DATES    MIN DATES    PCPN DATES

IAH    99   28      72   30**    88   28      79   19      3.97   31
GLS    94   29      75   19      88   27      81   19##    0.70   18
CLL    97   28*     69   20      87   27#     76   18      4.55   17
HOU    97   28      73    6      87   28#     81   19##    0.43   23
CXO    96   28      68   30**    86   28      77   19      0.74&  18
UTS    96   14*     68   20      87   14      76   19##    1.67   17
DWH    96   28*     71    4      87   21      79   19      1.14   31
SGR    98   28      71   11      87   27#     81    6##    0.91   24
LBX    95   29      69   12**    84   29#     80   11##    2.12   20
PSX    93   25*     71    4      88   31#     81   18##    1.00    4
LVJ    97   28      74   19**    87   29#     81   18      1.17   23
HGX    97   28      69    3      87   28      78   18      2.42   23

NOTES...THE LAST DATE OF OCCURRENCE IS NOTED IN THE TABLE. OTHER DATES
THAT TIED ARE AS FOLLOWS...
*  FOR HIGH TEMPERATURES...
   CLL - 9TH...13TH...14TH...AND 27TH
   UTS - 9TH
   DWH - 21ST...25TH...AND 27TH
   PSX - 21ST

** FOR LOW TEMPERATURES...
   IAH - 4TH...6TH...11TH...AND 19TH
   CXO - 6TH AND 11TH
   LBX - 9TH AND 11TH
   LVJ - 2ND...3RD...6TH...9TH...11TH...AND 12TH

#  FOR MAX DAILY AVERAGE TEMPERATURES...
   CLL - 14TH
   HOU - 21ST AND 22ND
   SGR - 20TH AND 21ST
   LBX - 20TH...21ST...AND 22ND
   PSX - 21ST
   LVJ - 21ST AND 28TH

## FOR MIN DAILY AVERAGE TEMPERATURES...
   GLS - 18TH
   HOU - 6TH AND 18TH
   UTS - 18TH
   SGR - 5TH
   LBX - 6TH AND 9TH
   PSX - 6TH AND 10TH

&  FOR MAX RAINFALL
   CXO - 17TH


THE FOLLOWING TABLE LISTS THE MONTHLY TEMPERATURE AND RAINFALL DATA 
FOR FIRST- AND SECOND-ORDER CLIMATE SITES ACROSS SOUTHEAST TEXAS...


                           JULY 2014 DATA

        AVE     AVE     MONTHLY AVE        MONTHLY       YEAR-TO-DATE
SITE    HIGH    LOW     DAILY   DEP     RAIN     DEP     RAIN    DEP

IAH     93.1    74.3    83.7   -0.7     5.40    +1.61   26.65   -1.46
GLS     90.2    79.3    84.8   +0.3     1.08    -2.72   11.30  -15.49
CLL     92.8    73.6    83.2   -1.5     6.72    +4.58   22.36   -0.48
HOU     92.2    75.6    83.9   +0.1     1.26    -3.40   21.08   -8.96
CXO     91.3    71.5    81.4   -1.2     2.91    -0.52   26.05   +0.92
UTS     91.8    73.4    82.6   -1.5     4.40    +1.02   25.62   -0.36
DWH     92.5    74.0    83.2   +1.1     3.42    -0.42   25.77   -1.62
SGR     93.4    74.5    84.0   +0.4     2.68    -1.68   23.80   -3.60
LBX     90.9    72.3    81.6   -0.7     4.21    -0.35   18.37   -9.28
PSX     90.6    77.9    84.3   +0.3     1.75    -3.01    9.46  -15.32
LVJ     92.4    75.7    84.0   +1.0     3.00    -1.71   19.07   -9.68
HGX     91.2    74.7    82.9   +0.9     5.11    +0.53   22.28   -7.31

Reminds me of 2002. Coastal areas were dry, while inland areas were wetter. Fall 2002 was very wet. Tropical Storm Fay paid a visit in September 2002.

[cisa]

Crazy here in Porter too. Our lights were out from 11 pm to 6pm. That was one of the craziest storm I''ve seen probably since the storms that came through in the Spring before Alicia. The lightening was spectacular.

[Rip76]

It feels like California out here tonight.