April Weather Discussion.

[wxdata]

From Houston's NWS:

A LINE OF STORMS LOCATED ALONG THE INTERSTATE 35 CORRIDOR AT 615
PM CDT ARE EXPECTED TO MOVE EASTWARD TOWARD AND INTO THE AREA
EARLY THIS EVENING. THE STORMS ARE EXPECTED TO BEGIN AFFECTING
LOCATIONS ALONG AND WEST OF A LINE FROM NORMANGEE TO BRYAN-C0LLEGE
STATION TO SOMERVILLE BY 8 PM.

[biggerbyte]

Look at what's coming this way....

http://wxweb.meteostar.com/models/noaap ... UMBLOOP=10

[Ptarmigan]

I looked at the Central Texas Doppler Radar and notice a nice line of thunderstorms. Wonder if they will be over us later tonight?

[Ounce]

So, how long is it going to take for Iceland's volcanic ash to make it around the earth to North America?? Thanks.

[sleetstorm]

Look at what's coming this way....

http://wxweb.meteostar.com/models/noaap ... UMBLOOP=10

Most of it has greatly decreased in intensity. I wonder if fresh new thuderstorms will form during the very early morning hours or if the whole line, which is mainly moderate rain, will also totally disintegrate during the very early morning hours as well?

[wxdata]

So, how long is it going to take for Iceland's volcanic ash to make it around the earth to North America?? Thanks.

Unless upper winds change, probably never (at least as Europe is experiencing now.)

[wxdata]

Both 0z NAM and GFS indicate rain chances for Sunday 60%+

[srainhoutx]

Nesdis Upadte...

SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/18/10 1429Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-13 1415Z KUSSELSON
NOAA AMSU:0838Z; BLENDED TPW PRODUCTS THRU 13Z
.
LOCATION...EASTERN AND SE TEXAS...
.
ATTN WFOS...HGX...FWD...CRP...
ATTN RFCS...WGRFC...
.
EVENT...CONVECTIVE BANDS RIGHT ALONG HIGHEST MOISTURE FOR LOCAL HVY
RAINS...
.
SATELLITE ANALYSIS AND TRENDS...CONVECTIVE BAND/BOUNDARY NOW ALONG
AXIS OF HIGHEST PRECIP WATER MOISTURE. FOR THE MOST PART THE MAX
PRECIP WATER VALUES HAVE SLIGHTLY DECREASED AS THE AXIS HAS SHIFTED
EAST AND BUCKING UP AGAINST PERSISTENT LOWER PWS/MIN OF PW TO THE EAST.
SO EVEN THOUGH CONVECTIVE BANDS CONTINUE TO MOVE SLOWLY EAST...ANY AREAS
OF REDEVELOPMENT ON EDGE OF THE HIGHEST MOISTURE COULD RESULT IN LOCAL
HVY AMOUNTS FOR A FEW HRS...POSSIBLY ENOUGH FOR URBAN TYPE PROBLEMS.
UPPER VORT NOW MOVING ACROSS CENTRAL TX ON WATER VAPOR AND WITH ADDED PUSH
BY LEADING EDGE OF SUBTROPICAL JET AND W SD/W NEBRASKA AND W KS VORTS
TO THE NORTH...SHOULD CONTINUE TO SEE A PUSH OF CONVECTIVE BAND EAST
AND FURTHER WEAKENED BY TOUGH TO LEAVE DRY AIR/LOWER PWATS TO THE EAST.

[srainhoutx]

HGX Update...

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1059 AM CDT SUN APR 18 2010

.UPDATE...
UPDATED MORNING FORECAST FOR ONGOING PRECIP TRENDS. LOCALLY HEAVY
RAINFALL REMAINS POSSIBLE THROUGH THE AFTERNOON.

&&

.DISCUSSION...
KHGX 88D SHOWS MAINLY SCT SHOWERS AND COUPLE OF THUNDERSTORM
CLUSTERS. ONE IS SITUATED IN WALLER AND NW HARRIS CO. THESE
STORMS ARE MOVING SLOWLY OFF TO THE E AND NE. SLOW STORM MOVEMENT
WILL BE THE TREND FOR THE AFTERNOON SO ANY STORMS THAT DEVELOP
RAIN RATES NEAR 2 INCHES AN HOUR MAY CAUSE A PROBLEM AND
LOCALIZED FLOODING. A SECOND LARGER CLUSTER OF STORMS IS LOCATED
IN S FORT BEND AND W BRAZORIA CO. SEVERAL STORM MERGERS ARE
OCCURRING AND WITH SLOW STORM MOVEMENT...HEAVY RAINFALL WILL BE
POSSIBLE IN THESE STORMS. THESE STORMS ARE GENERATING 1-1.5
INCHES OF RAIN AN HOUR. HIGHER RAIN RATES COULD BE POSSIBLE AS
THESE STORMS MOVE INTO DEEPER MOISTURE WITH PW AROUND 1.4 INCHES
AND DEWPOINTS IN THE MID 60S. THIS ACTIVITY SEEMS TO BE
DEVELOPING AND RE- DEVELOPING ALONG A WEAK TROUGH EXTENDING FROM
A SFC LOW IN N C TX. ANOTHER WEAK SFC LOW WAS DEVELOPING OFF THE
COAST OF KCRP. THESE FEATURES WILL BE SLOW TO MOVE EAST BUT
SHOULD HAVE SOME MOVEMENT WITH A JET STREAK/SHORTWAVE MOVE ACROSS
THE AREA.

FORECAST UPDATE SO FAR WAS TO KEEP POPS IN LINE WITH CURRENT
TRENDS WITH HIGHER POPS SHIFTING EAST SLOWLY WITH TIME. DAYTIME
HEATING MAY BE LIMITED BY CLOUD COVER AND SCT SHOWERS SO DROPPED
MAX TEMPS A DEGREE OR TWO ACROSS THE AREA. OTHERWISE NO OTHER
CHANGES WERE MADE.

39

[wxdata]

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1046 AM CDT SUN APR 18 2010


.NOW...
THROUGH 3 PM...EXPECT AREAS OF RAIN WITH EMBEDDED SHOWERS AND THUNDERSTORMS
TO SLOWLY MOVE EAST...AROUND 10 MPH...ACROSS THE AREA. ACTIVITY WILL
GENERALLY BE ALONG AND EAST OF A LINE FROM AUSTONIO TO PRAIRIE VIEW
TO MATAGORDA. RAINFALL TOTALS WILL AVERAGE AROUND 1/4 INCH. WHERE SLOWER
MOVING OR TRAINING STORMS OCCUR...RAINFALL TOTALS COULD APPROACH 2 INCHES
WHICH COULD LEAD TO SOME LOCALIZED FLOODING.

[svrwx0503]

The storm moving out of northeastern Ft. Bend into Western Harris county is a very proficient rain and lightning maker. Have over 1 inch in the rain bucket and its only been raining for about 20min. Also, there are a ton of cloud to ground lightning strikes with the storm as well so be careful if your going to be going out on the western side of the county.

[wxdata]

Also, Nexrad suggest .25" hail possible with the storm.

[srainhoutx]

Getting some rumbles of thunder now in NW Harris County. Very dark skies to my S as well.

[Ptarmigan]

It is raining and I hear thunder outside.

[wxdata]

Echo tops with the storms in Harris county approaching 30,000 ft.

[srainhoutx]

Over an inch of rain at my location and still coming down. My allergies are grateful.

[Puzzled1]

Does anyone know if this cluster of storms is going to increase in size or is this all we will get today?

[wxdata]

Neat shot from one of the Weather Bug cameras showing the storms moving northeast of the Galleria and brighter skies to the west...

[TexasMetBlake]

Just in from church and the drive from Greenway to The Woodlands was SLOW and the weather was HORRIBLE!!! I bet the rainfall rates EASILY topped an inch and a half an hour at times. Man, that's the hardest rain I've seen in a while...

[Ptarmigan]

Just in from church and the drive from Greenway to The Woodlands was SLOW and the weather was HORRIBLE!!! I bet the rainfall rates EASILY topped an inch and a half an hour at times. Man, that's the hardest rain I've seen in a while...

Quite a rainfall it was.