Hottest rain on record? Rain falls at 115°F in Needles, California

By: Dr. Jeff Masters , 3:19 PM GMT on August 15, 2012

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A searing heat wave rare even for the Desert Southwest sent temperatures soaring to record levels on Monday, with Needles, California tying its record high for the date of 118°F (47.8°C). The temperature might have gone higher in Needles, but a thunderstorm rolled in at 3:20 pm, and by 3:56 pm PDT, rain began falling at a temperature of 115°F (46.1°C). Most of the rain evaporated, since the humidity was only 11%, and only a trace of precipitation was recorded in the rain gauge. Nevertheless, Monday's rain at 115° in Needles sets a new world record for the hottest rain in world history. I don't think many people were outside to experience to experience the feeling of rain falling at 115°, but if they were, it must have been an uncomfortable, sauna-like experience! Thanks go to Dr. Warren Blier of the NWS Monterey office for pointing out this remarkable event to me.

It is exceedingly rare to get rain when the temperature rises above 100°F, since those kind of temperatures usually require a high pressure system with sinking air that discourages rainfall. Monday's rain in Needles was due to a flow of moisture coming from the south caused by the Southwest U.S. monsoon, a seasonal influx of moisture caused by the difference in temperature between the hot desert and the cooler ocean areas surrounding Mexico to the south. According to weather records researcher Maximiliano Herrera, the previous record for hottest rain, which I blogged about in June, was a rain shower at 109°F (43°C) observed in Mecca, Saudi Arabia on June 5, 2012 and in Marrakech, Morocco on July 10, 2010. The 11% humidity that accompanied Monday's rain shower at 115° in Needles was the lowest humidity rain has ever occurred at anywhere on Earth in recorded history, according to Mr. Herrera.


Figure 1. True-color MODIS satellite image of California and Arizona taken at 1:25 pm PDT August 13, 2012. Developing thunderstorms surround Needles, CA, and the line of clouds to the southwest of the city would develop into a thunderstorm that brought rain to the city at 4 pm PDT, at a temperature of 115°F. Image credit: NASA.

A "very rare" heat wave for Phoenix
The heat wave that brought Needles' record hot rain has broken an exceptional number of heat records in Phoenix, Arizona the past two weeks. According to the Phoenix NWS office, the "almost unbearable heat" of the first two weeks of August is a "very rare" event, and August 1 - 14, 2012 was the warmest such 2-week period in city history. The average temperature on August 6 - 13 was 100°F or higher each of the eight days, tying the record for most consecutive days with an average temperature of 100°. The temperature peaked at 116° on August 8, just 6° below Phoenix's all-time record of 122° set on June 26, 1990. The forecast for Phoenix call for a bit of relief--highs are expected to be a relatively modest 105° today, and down near 100° by Friday.


Figure 2. Morning satellite image of 93L over the Central Atlantic.

93L close to tropical depression status
A large tropical wave (Invest 93L) is located in the Central Atlantic about 700 miles east of Bermuda. Satellite loops this morning show a surface circulation has formed, and heavy thunderstorm activity has increased to the point where 93L should be considered a tropical depression, if the heavy thunderstorms can persist through this afternoon. Wind shear is light, and ocean temperatures are warm, near 28°C. The latest Saharan Air Layer Analysis from the University of Wisconsin shows that 93L has moistened its environment considerably, and dry air should no longer be a significant impediment to development. The 8 am EDT run of the SHIPS model predicts that wind shear will remain in the low range through the weekend, and I expect this system will become Tropical Storm Gordon by Friday. The storm will not affect Bermuda, but residents of the Azores Islands should keep an eye on 93L, which could pass through the islands as early as Sunday night. In their 8 am Tropical Weather Outlook, NHC gave 93L an 80% chance of becoming a tropical depression by Friday morning.

Elsewhere in the tropics
In the Gulf of Mexico, a fall-like cold front is expected to stall out early next week, and the GFS model is predicting something could start to spin up near the Texas/Mexico border on Monday. Wind shear is predicted to be low to moderate, and cold fronts stalled out over the Gulf of Mexico often serve as the seed for tropical storms.

Most of the models predict development of a new tropical wave off the coast of Africa 6 - 7 days from now.

Jeff Masters

Haboob #7 (nukegm)
Another dust storm rolling into town.
Haboob #7
Strike over the Lake. (weathercts99)
A stunning bolt of lightning over a lake in Chandler.
Strike over the Lake.

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TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 PM EDT WED AUG 15 2012

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

A WELL-DEFINED LOW PRESSURE SYSTEM IS LOCATED OVER THE CENTRAL
ATLANTIC ABOUT 630 MILES EAST-SOUTHEAST OF BERMUDA. SHOWER AND
THUNDERSTORM ACTIVITY CONTINUES TO SHOW SIGNS OF ORGANIZATION...
AND A TROPICAL DEPRESSION COULD FORM LATER TODAY. THIS SYSTEM
HAS A HIGH CHANCE...90 PERCENT...OF BECOMING A TROPICAL CYCLONE
DURING THE NEXT 48 HOURS AS IT MOVES NORTH-NORTHWESTWARD TO
NORTHWARD AT 15 MPH TODAY...AND TURNS NORTHEASTWARD TOMORROW.

A TROPICAL WAVE...THE REMNANTS OF TROPICAL DEPRESSION SEVEN...IS
LOCATED OVER NORTHERN GUATEMALA...BELIZE...AND THE YUCATAN
PENINSULA. THIS DISTURBANCE IS PRODUCING DISORGANIZED SHOWERS AND
THUNDERSTORMS OVER THE FAR NORTHWESTERN CARIBBEAN SEA...THE YUCATAN
PENINSULA...AND PORTIONS OF CENTRAL AMERICA. THIS SYSTEM HAS A LOW
CHANCE...NEAR 0 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE
NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD AT 15 TO 20 MPH ACROSS
GUATEMALA AND SOUTHEASTERN MEXICO. HOWEVER...LOCALLY HEAVY RAINS
WILL BE POSSIBLE ACROSS PORTIONS OF CENTRAL AMERICA AND SOUTHERN
MEXICO THROUGH THURSDAY.

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE
NEXT 48 HOURS.

$$
FORECASTER STEWART
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Quoting seer2012:
Maybe a slow starter to start with but I don't see shear and dry air wiping this wave out.I can see this ending up in the Leewards on its' way to Puerto Rico.
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Quoting Tropicsweatherpr:
Big Wave now in West Africa is now Pouch 15L.

15L
14N, 0E/W
700 hPa


ECMWF: Moves P15L relatively straight off of Africa and over the eastern Atlantic, intensifying a little as it moves over the ocean.

GFS: Eastern most initial OW max in a SW-NE line of several OW maxima. Entire line orients N-S, with P15L gaining quite a bit of latitude. Intensifies.

UKMET: Like GFS, UKMET moves northwestward early on, but then it develops another circulation farther to the west just off the African coast. P15L then turns westward and also heads westward, but it is weaker than the other circulation ahead of it.

NOGAPS: Like GFS & UKMET, NOGAPS depicts an initial SW-NE elongation. It takes a couple days (faster wave catching up with a slower one? Wave moving into monsoonal wrap-up?), but eventually one single pouch is depicted at 60 hours, which then tracks smoothly to the west with some intensification. Result is a westward track that is slower than ECMWF.

HWRF-GEN:


ECMWF -10.7 v700 120h
GFS -7.9 v700 120h
UKMET -8.6 v700 120h
NOGAPS -7.3 v700 120h
HWGEN ---- ---- ---h

Link

The NOGAPS has been the worst performer (As usual) this year...
It has split apart almost every TROPICAL storm that has developed (AKA Debby, Ernesto)

Do we have a renumber (AL08), on 93L yet?
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173. VR46L
Quoting seer2012:
Maybe a slow starter to start with but I don't see shear and dry air wiping this wave out.I can see this ending up in the Leewards on its' way to Puerto Rico.


Dont see why not ,93L is still alive and kicking ..and the High on some of the models, re-establishes itself rather Quickly and may not allow it to go out to sea like 93L will do.
Member Since: March 1, 2012 Posts: 0 Comments: 6842
172. skook
Quoting bappit:

The water would have been a heat sink as it evaporated. Since the rain was evaporating, only a trace reached the ground anyway and the air was just as hot, I don't think it would have felt bad.



I kinda agree about the felling bad, i don't think you would of really noticed it, with such little rainfall making it to the ground. During our thunderstorms here in Fl, they usually bring relief to the heat. But once every so often, after usually it seems a quick heavy rainfall, it reminds me of a sauna, with rain evaporating off the ground, not taking a hot shower, which I love to do regardless of temp.
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If world records are being set, and rare climate events aren't rare anymore, NOW can we say climate change? Or do we still need legislative permission?

I'm thankful we are getting the rain without the tropical storms so far.(in Florida)

Pythons are changing the everglades environment. We need to start having snake harvest festivals down there with Python Polenta, free hyde tanning, boot sales, and a John Cleese film festival.
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12z CMC..shows the low and then drops it next frame
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BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
124 PM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
QUEENS COUNTY IN SOUTHEAST NEW YORK...
NEW YORK (MANHATTAN) COUNTY IN SOUTHEAST NEW YORK...
KINGS (BROOKLYN) COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 230 PM EDT...

* AT 121 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
OZONE PARK...OR NEAR CROWN HEIGHTS...AND MOVING EAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ASTORIA...HOWARD BEACH...JACKSON HEIGHTS...FOREST HILLS...
FLUSHING...JAMAICA...LITTLE NECK...CLEARVIEW EXPRESSWAY...
WHITESTONE AND BAYSIDE

LAT...LON 4066 7403 4068 7403 4069 7401 4070 7402
4077 7400 4079 7389 4079 7387 4081 7381
4080 7377 4078 7376 4075 7370 4073 7371
4072 7373 4067 7373 4061 7401
TIME...MOT...LOC 1724Z 248DEG 4KT 4070 7388



NV
Member Since: August 6, 2011 Posts: 4 Comments: 37121
Quoting mcluvincane:



Adrian, September is coming lol...... you will eat your words... also i agree with reed, you seem to be almost trollish if you ask me


What does september have to do with the overall steering pattern? The CURRENT pattern does indeed favor recurve. As i stated thanks to the sal typical outbreaks in july and that TUTT in the central atl ernesto was not able to take advantage of the window which the US was vulnerble. The pattern can change back again, but it's going to take time. With the weak nino developing, we probably won't see much after the 1st week of Oct, but some time between mid/late Sep thru early Oct I could see either a long-track easterly wave or some kind of western Caribbean genesis perhaps threatening the US.
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Quoting hurricane23:



Sorry meant to say cat8 headed for florida 275mph winds eveyone take cover now. :0) I was just referring to the overall pattern across which in my view heavily favors recurving TCs. What has been a great pattern for easterly waves to cross the Atlantic has been largely wasted due to too much SAL. The only thing that really came out of it was Ernesto.


I agree, the pattern generally supports a recurve with a weaker A/B high thanks to a negative NAO. The problem will be spinups like the FIM/GFS have been showing as of late that might pose a threat to the Gulf Coast if things can really get going and threats like Ernesto, which put on a rather impressive spurt of intensification once it reached the Western Caribbean after virtually being a wave through the entire trek through the Caribbean, being picked up by troughs come mid-September.
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Quoting cyclonekid:
Humberto like situation?
Could be where it originates from and tracks look similar.

Member Since: August 31, 2009 Posts: 0 Comments: 5628
Quoting skook:
I know people are comparing the extremely hot rain to taking a extremely hot shower, but I would like to know what the actually temperate of the rain was. Or in general how air temp, and rainwater temp compare. I'm sure it has to deal with how high the clouds are and so on.. but if anyone has insight on the actually temp of rain falling, not air temp, would be much appreciated.

The water would have been a heat sink as it evaporated. Since the rain was evaporating, only a trace reached the ground anyway and the air was just as hot, I don't think it would have felt bad.
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last frame of the 12z NOGAPS..HUGE wave near africa..
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Quoting Tropicsweatherpr:


Is there a web cam showing it in real time?


Found this S link updated each minute.... For the moment it looks calm...

Link
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Is that a low starting to develope in the NW Car.??
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Quoting GTcooliebai:
12z GFS 6-10 day rainfall totals:

..seems like the texas drought is about to be broken, which is a good thing..hopefully without damage and flooding, especially as the models put a tropical something near Texas in a week or so
Member Since: August 6, 2011 Posts: 4 Comments: 37121
Quoting kshipre1:
the scary part about that is that the blob moved eastward.
hmm...question is will the trough be able to pull it, strength of the storm will be the key or will the high nudge it into S. TX/ N. MX?
Member Since: August 31, 2009 Posts: 0 Comments: 5628
Quoting GTcooliebai:
168 hrs. a hurricane on the doorstep of the TX/LA border:

Humberto like situation?
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Quoting sunlinepr:
Simmering giant: 38 gas emissions reported from Mexico’s Popocatepetl volcano
Posted on August 15, 2012


August 15, 2012 – MEXICO CITY, México - The Popocatepetl volcano registered 38 exhalations in the last 24 hours and one on the morning of Tuesday, was accompanied by slight amount of ash, as reported by the National Center for Disaster Prevention (Cenapred). In his report at 11:00 hours, indicated that all the exhalations of the last 24 hours were of low intensity, of which the most important were: one at 15:47 hours on Monday, another at 3:23 and most recently at 8:29, which was accompanied by ash. Bad weather conditions that prevailed during the Monday afternoon and Tuesday morning has obstructed visibility and, therefore, it is unclear which direction dispersed emissions from the volcano traveled. From the morning until the time of writing this report there is a plume of water vapor and gas that rises a few meters above the crater, due to strong wind that goes to the northwest. The report makes no reference to seismic activity associated with the volcano or possible ashfall in neighboring towns. –Noticieros Televisa



Is there a web cam showing it in real time?
Member Since: April 29, 2009 Posts: 75 Comments: 14076
Quoting WDEmobmet:
So much for me ever visiting the Everglades



Huge Burmese python caught in Florida Everglades
..several years ago they increased the fines down there for the people who bought these snakes, found they got too big and released them into the swamp..where..as you can see..they get HUGE, good thing I too..wont ever go there, alot more where that came from
Member Since: August 6, 2011 Posts: 4 Comments: 37121
12z GFS 6-10 day rainfall totals:

Member Since: August 31, 2009 Posts: 0 Comments: 5628
Simmering giant: 38 gas emissions reported from Mexico’s Popocatepetl volcano
Posted on August 15, 2012


August 15, 2012 – MEXICO CITY, México - The Popocatepetl volcano registered 38 exhalations in the last 24 hours and one on the morning of Tuesday, was accompanied by slight amount of ash, as reported by the National Center for Disaster Prevention (Cenapred). In his report at 11:00 hours, indicated that all the exhalations of the last 24 hours were of low intensity, of which the most important were: one at 15:47 hours on Monday, another at 3:23 and most recently at 8:29, which was accompanied by ash. Bad weather conditions that prevailed during the Monday afternoon and Tuesday morning has obstructed visibility and, therefore, it is unclear which direction dispersed emissions from the volcano traveled. From the morning until the time of writing this report there is a plume of water vapor and gas that rises a few meters above the crater, due to strong wind that goes to the northwest. The report makes no reference to seismic activity associated with the volcano or possible ashfall in neighboring towns. –Noticieros Televisa

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the scary part about that is that the blob moved eastward.
Quoting GTcooliebai:
168 hrs. a hurricane on the doorstep of the TX/LA border:

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Quoting VR46L:


The Wave that,s due to come off shortly looks rather vigorous and interesting too...Could be an interesting week next week!!!

Rainbow


and its initial environment looks good on departure

water vapour

Maybe a slow starter to start with but I don't see shear and dry air wiping this wave out.I can see this ending up in the Leewards on its' way to Puerto Rico.
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151. skook
I know people are comparing the extremely hot rain to taking a extremely hot shower, but I would like to know what the actually temperate of the rain was. Or in general how air temp, and rainwater temp compare. I'm sure it has to deal with how high the clouds are and so on.. but if anyone has insight on the actually temp of rain falling, not air temp, would be much appreciated.
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Its been a rainy morning here...

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Quoting hurricane23:



Sorry meant to say cat8 headed for florida 275mph winds eveyone take cover now. :0) I was just referring to the overall pattern across which in my view heavily favors recurving TCs. What has been a great pattern for easterly waves to cross the Atlantic has been largely wasted due to too much SAL. The only thing that really came out of it was Ernesto.



Adrian, September is coming lol...... you will eat your words... also i agree with reed, you seem to be almost trollish if you ask me
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168 hrs. a hurricane on the doorstep of the TX/LA border:

Member Since: August 31, 2009 Posts: 0 Comments: 5628
Quoting hurricane23:



Sorry meant to say cat8 headed for florida 275mph winds eveyone take cover now. :0) I was just referring to the overall pattern across which in my view heavily favors recurving TCs. What has been a great pattern for easterly waves to cross the Atlantic has been largely wasted due to too much SAL. The only thing that really came out of it was Ernesto.


Anything that developes early across the Cape Verde region will all recurve at this point given the current set up. The only fly in the ointment will be if these waves stay week and slip into the caribbean then get picked up by a trough.

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Thanks Dr Masters, 93L is looking really good and everything is great up here!!!
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Quoting reedzone:


Typical Adrian.. Recurve or die.. That's the theme of every storm.


It's the truth. Look at the pattern and if anything the trough over the east is really going to amplify come next week while giving FL a ton of rain.

Very significant trough here on the GFS across the east.
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So much for me ever visiting the Everglades



Huge Burmese python caught in Florida Everglades
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Quoting reedzone:


Typical Adrian.. Recurve or die.. That's the theme of every storm.



Sorry meant to say cat8 headed for florida 275mph winds eveyone take cover now. :0) I was just referring to the overall pattern across which in my view heavily favors recurving TCs. What has been a great pattern for easterly waves to cross the Atlantic has been largely wasted due to too much SAL. The only thing that really came out of it was Ernesto.
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Quoting WxGeekVA:


If it looks like a tropical storm... And moves like a tropical storm... It must be an 80% AOI.


I don't know pressures are high and there is not much rotation at the mid levels.
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Quoting ncstorm:
I just hate the colors on this map but its faster

138 hours

That is hard to look at.
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162 hrs. 10 meter wind:

Member Since: August 31, 2009 Posts: 0 Comments: 5628
Quoting hurricane23:


Current trough/ridge pattern still favors recurving.


Yep, looks as if this El-Nino pattern has locked itself in already. People can say what they want but ask the folks up north which have already cooled down considerably.
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136. VR46L
Quoting FtMyersgal:
Out of Africa



The Wave that,s due to come off shortly looks rather vigorous and interesting too...Could be an interesting week next week!!!

Rainbow


and its initial environment looks good on departure

water vapour

Member Since: March 1, 2012 Posts: 0 Comments: 6842
162 hours.
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If it looks like a tropical storm... And moves like a tropical storm... It must be an 80% AOI.
Member Since: September 3, 2011 Posts: 13 Comments: 3468
Monday's rain at 115° in Needles sets a new world record for the hottest rain in world history. I don't think many people were outside to (experience to experience) the feeling of rain falling at 115
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84 hrs:

Member Since: August 31, 2009 Posts: 0 Comments: 5628
I guess the bermuda high in the atlantic could have been strong for a longer time but due to developing el nino, troughs are deeper and more consistent.
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31 Neapolitan: For the record, the average shower water temperature for most people is between 105-110, and in fact most codes require nothing over 120; that's considered close to scalding

While scalding temperature is ~10degrees hotter (give or take) for healthy adults, contact with 120degree water for a few short minutes can cause scalding (ie induce skin blisters) in sensitive infants, the elderly, the critically diabetic, etc.
Which is why most plumbers&contractors won't expose themselves to the liability incurred from installing residential systems hotter than 120degrees.
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I agree. seems like more storms to watch closer to home in gulf , caribbean and western atlantic.
Quoting CybrTeddy:


As the norm for about 70% of CV systems.

Really thinking that this year we need to watch out for stuff like Ernesto getting picked up by a trough come September.
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Quoting ncstorm:
last frame



Sigh September's comin'...
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12z Experimental FIM starts organizing the BOC disturbance in 3 days maybe even as soon as in 54 hrs:

Member Since: August 31, 2009 Posts: 0 Comments: 5628
Quoting CybrTeddy:


As the norm for about 70% of CV systems.

Really thinking that this year we need to watch out for stuff like Ernesto getting picked up by a trough come September.


Typical Adrian.. Recurve or die.. That's the theme of every storm.
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.