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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Quoting CajunCrawfishhunter:


Broussard here


How's the weather in Broussard?
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Bingo.
invest_RENUMBER_al932012_al082012.ren

TD8.
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Quoting Redbull77:
Never started raining here in youngsville, la. But cooled it off about 10 degrees. It's actually quite comfortable for august in south Louisiana.


Broussard here
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Quoting washingtonian115:
Hopefully this is the way it works out.93L becomes Gordon(most likely).The storm in the BOC becomes Helene and the cape verde storm becomes Isaac...


Maybe so. I don't think alot of folks want to see an "I" storm in the GOM again...
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Score!!
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Never started raining here in youngsville, la. But cooled it off about 10 degrees. It's actually quite comfortable for august in south Louisiana.
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Quoting washingtonian115:
Hopefully this is the way it works out.93L becomes Gordon(most likely).The storm in the BOC becomes Helene and the cape verde storm becomes Isaac...


YESSS let it happen!!! :)
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Quoting Tribucanes:
Been in the upper 40's and low fifties at night here in SC Wisconsin. Highs in the low to mid seventies. After a couple months of the brutal stuff this is a nice reprieve. That historic monster storm over the Arctic and what it did to the ice content is simply amazing. At least we'll have a TD/TS to follow later this afternoon. If 51' is a good analog year then those saying this year is headed towards dud status may well be right. An analog is only so good though, many many differing elements between the two years; I'm sure that'll make this year unique to itself. Season may still explode in the next few weeks. Isaac's coming soon.


Trib, where are you in SC Wisconsin?
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368. JLPR2
Some dark red getting ready to emerge from Africa.
I don't think I have seen much of that color this year.

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93L has been renumbered!!!

BEGIN
NHC_ATCF
invest_RENUMBER_al932012_al082012.ren
FSTDA
R
U
040
010
0000
201208151933
NONE
NOTIFY=ATRP
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366. JLPR2
Quoting VAbeachhurricanes:


So what? just look at it, surrounded by dry air.



It looks awesome, considering the circulation itself was embedded in dry and somehow managed to produce all of that moisture.
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BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
329 PM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN WARE COUNTY IN SOUTHEAST GEORGIA
EXTREME EASTERN CLINCH COUNTY IN SOUTHEAST GEORGIA
NORTHERN CHARLTON COUNTY IN SOUTHEAST GEORGIA

* UNTIL 415 PM EDT

* AT 329 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR STEVEN FOSTER STATE PARK...AND MOVING EAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HOMELAND AND FOLKSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.



LAT...LON 3094 8246 3098 8192 3082 8192 3083 8195
3078 8198 3079 8202 3076 8202 3075 8204
3071 8204 3069 8204 3066 8234 3075 8253
TIME...MOT...LOC 1929Z 273DEG 16KT 3083 8229



SHASHY
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Been in the upper 40's and low fifties at night here in SC Wisconsin. Highs in the low to mid seventies. After a couple months of the brutal stuff this is a nice reprieve. That historic monster storm over the Arctic and what it did to the ice content is simply amazing. At least we'll have a TD/TS to follow later this afternoon. If 51' is a good analog year then those saying this year is headed towards dud status may well be right. An analog is only so good though, many many differing elements between the two years; I'm sure that'll make this year unique to itself. Season may still explode in the next few weeks. Isaac's coming soon.
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Quoting washingtonian115:
No..Because I like the name...

lol oh ok :p
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FLOOD ADVISORY
NATIONAL WEATHER SERVICE SAN JUAN PR
217 PM AST WED AUG 15 2012

PRC121-125-153-152115-
/O.NEW.TJSJ.FA.Y.0305.120815T1817Z-120815T2115Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000 Z.OO/
SABANA GRANDE PR-SAN GERMAN PR-YAUCO PR-
217 PM AST WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY
FOR THE FOLLOWING MUNICIPALITIES...

IN PUERTO RICO
SABANA GRANDE...SAN GERMAN AND YAUCO

* UNTIL 515 PM AST

* AT 215 PM AST...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS
CLUSTERED OVER SAN GERMAN AND SABANA GRANDE MOVING GENERALLY
WESTWARD AROUND 10 MPH. RAINFALL AMOUNTS OF UP TO TWO INCHES MAY BE
OCCURRING WITH THESE THUNDERSTORMS. THIS COULD RESULT IN FLOODING OF
URBAN AND POOR DRAINAGE AREAS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 1803 6689 1803 6696 1806 6701 1806 6711
1810 6711 1811 6708 1814 6709 1817 6707
1817 6702 1814 6697 1815 6694 1814 6686
1817 6683 1813 6680 1795 6685

$$

ROSA
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Quoting Doppler22:

Why?? do u have a bad feeling about it or a good feeling??? Or is it because its another I storm which usually means strong
No..Because I like the name...
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BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
310 PM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
SOUTHWESTERN SHENANDOAH COUNTY IN NORTHWEST VIRGINIA...

* UNTIL 615 PM EDT

* AT 307 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING. RADAR
ESTIMATES THAT UP TO AN INCH AND A HALF OF RAIN HAVE ALREADY
FALLEN ACROSS PORTIONS OF THE WARNED AREA. ADDITIONAL RAINFALL
AMOUNTS OF UP TO 1 INCH CAN BE EXPECTED.

* SOME LOCATIONS THAT ARE AFFECTED BY THE HEAVY RAIN INCLUDE MOUNT
JACKSON.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF
SMALL CREEKS AND STREAMS...ROADS AND FARMLAND ALONG THE BANKS OF
CREEKS AND STREAMS.

LAT...LON 3885 7880 3877 7853 3862 7865 3877 7884



HTS
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Quoting LavosPhoenix:
The Midwest really needs this hypothetical tropical storm to form in the GoM/BoC and move up thru Texas into Oklahoma/Kansas/Missouri/Illinois/Iowa/Dakotas and dump alot of rain. Even with severe thunderstorms the area isn't getting enough since they tend to randomly evaporate before getting to the worst areas and they emit some awful lightning.
..yes they surely do need the rains
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Quoting washingtonian115:
Well that's one of the storms I've been looking forward to now since the end of last hurricane season.

Why?? do u have a bad feeling about it or a good feeling??? Or is it because its another I storm which usually means strong
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Quoting VAbeachhurricanes:


So what? just look at it, surrounded by dry air.

Not that bad actually.
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Quoting AtHomeInTX:
Hmmmm other than the gulf that Atlantic storm's coming in low.



The system is, however, already at the latitude of the northernmost Leeward Islands at that time, so there would need to be some sort of monster ridge to steer the system west enough for it to be a threat to the Eastern Seaboard (could happen).
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This Is My New Afternoon Update Video Blog Link
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Got clipped by a storm that barely missed it's mark in Kemah. The agony! All summer that's happened here in League City/Kemah.
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Quoting HurricaneDean07:

"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."
-Dr. Masters.


So what? just look at it, surrounded by dry air.

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Quoting Doppler22:

u really want Issac dont u??? :p
Well that's one of the storms I've been looking forward to now since the end of last hurricane season.
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351. JLPR2
Quoting HurricaneDean07:

So basically...
1013 MB low near a 1028 MB A/B high would translate into about a 1006 MB low near the tropics.


Sounds about right and from the looks of it 93L's pressure will never be that impressive.
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Quoting WeatherMSK:
This seems to always be your opinion on every storm that shows up on the models! I personally think it will lift through that weakness.



A very weak weakness, I don't see it.. I see a lift to the north, but no recurve on the EURO.
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Member Since: July 15, 2006 Posts: 176 Comments: 55665
290 robintampabay: Well it is not all man made. When Hurricane Andrew hit in 92 there were numerous exotic snake breeding facilities in Homestead that got destroyed and hence released many different types of snakes that found their way to the Glades.

Yep, jes set up some love hotels and the next thing ya know,
ya got heading to Florida. The real question being,
who thought it was a good idea to set up accommodations for them in the first place?
Member Since: August 21, 2007 Posts: 0 Comments: 4860
This seems to always be your opinion on every storm that shows up on the models! I personally think it will lift through that weakness.

Quoting reedzone:
EURO shows a reasonable scenario... Almost a similar track like Frances in 2004, the storm avoids the islands, but as a new ridge the west builds after the storm lifts north, it most likely forces the storm to move more to the west. I don't think a weakness that small and weak would recurve a storm.. Just my personal opinion.

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Quoting JLPR2:


Say hello to 93L's best friend, Mr. High Pressure. XD

I'm amazed it's pressure is so low when sitting next to that.


So basically...
1013 MB low near a 1028 MB A/B high would translate into about a 1006 MB low near the tropics.
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Quoting TXCWC:


hmmm, thanks I had not seen that - that HPC day 7 map with a stalled front and S/TX low looks like a good rain set up...hopefully


Yeah I hope so. Was interesting EURO run that time though.
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Stage looks set for a CV tropical storm

Pattern favors a recurve, but it's early.

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Quoting washingtonian115:
Hopefully this is the way it works out.93L becomes Gordon(most likely).The storm in the BOC becomes Helene and the cape verde storm becomes Isaac...

u really want Issac dont u??? :p
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Member Since: July 15, 2006 Posts: 176 Comments: 55665
Massive shift in the track of Kai-Tak... A day or two ago it was forecast to brush southern Taiwan and move inland well north of Honk Kong. Look now:

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Quoting washingtonian115:
Nooo!.


What has upset you? Tell me and I shall mock it 1,000 times...or at least 3.
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Quoting StormTracker2K:


Yeah, it's terrible and I had to laugh at the person who said that model would be replacing the GFS soon. Lot's of wishcasting for storms lately and it's only going to get worse as overall the pattern looks pretty meek other than a possible weak low in the Gulf this weekend. TX to FL can expect a very rain weather pattern from Saturday thru all of next week as a strong front stalls out across the northeern Gulf. Big cool down for folks up north with lows in the 40's!


it is to cool but not as much as previous depictions

Member Since: July 15, 2006 Posts: 176 Comments: 55665
Quoting HurricaneDean07:

Not good for any other asain country. (Vietnam or China)

They're having a rough year out there. If this was a West Pacific blog we would have had a lot to talk about so far.
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Quoting washingtonian115:
Hopefully this is the way it works out.93L becomes Gordon(most likely).The storm in the BOC becomes Helene and the cape verde storm becomes Isaac...

Sounds like the scenario, to me....
Gordon and Helene, at the least out of the scenario.
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336. JLPR2
Quoting HurricaneDean07:

35 Mph, 1013 MB?

Thats pretty weak...


Say hello to 93L's best friend, Mr. High Pressure. XD

I'm amazed it's pressure is so low when sitting next to that.

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Quoting MAweatherboy1:
Kai-Tak is now a typhoon:


Not good for any other asain country. (Vietnam or China)
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Hopefully this is the way it works out.93L becomes Gordon(most likely).The storm in the BOC becomes Helene and the cape verde storm becomes Isaac...
Member Since: Posts: Comments:
333. TXCWC
Quoting AtHomeInTX:


From HPC


WITH THE EXCEPTION OF ADDING A SPOT LOW APPROACHING
BROWNSVILLE...TEXAS...DAYS 6 AND 7...AS PER COORDINATION WITH THE
NATIONAL HURRICANE CENTER...MADE ONLY COSMETIC CHANGES TO THE
UPDATE PACKAGE FOR THE FINAL ISSUANCE. THE LOW ALONG THE GULF
COAST OF MEXICO IS INTENDED TO REFLECT THE POSSIBILITY OF TROPICAL
DEVELOPMENT...BUT IN THE MOST PRACTICAL SENSE...ADDS SUPPORT FOR
INCREASING THE PROBABILITY OF PRECIPITATION OVER THE REGION IN THE
MOIST FLOW NEAR THE SOUTHERN EDGE OF THE WESTERLIES



hmmm, thanks I had not seen that - that HPC day 7 map with a stalled front and S/TX low looks like a good rain set up...hopefully
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Quoting reedzone:
EURO shows a reasonable scenario... Almost a similar track like Frances in 2004, the storm avoids the islands, but as a new ridge the west builds after the storm lifts north, it most likely forces the storm to move more to the west. I don't think a weakness that small and weak would recurve a storm.. Just my personal opinion.



Different look at it there. Doesn't look too recurvy on that. :(
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Kai-Tak is now a typhoon:

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Quoting Neapolitan:
ATCF is keeping 93L an invest for now:

AL, 93, 2012081518, , BEST, 0, 291N, 550W, 30, 1013, LO, 34, NEQ, 0, 0, 0, 0, 1017, 150, 35, 0, 0, L, 0, , 0, 0, INVEST, M,


Wouldn't expect a renumber until 330EDT or so anyway.
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Quoting WalkingInTheSun:
Seems like ex-TD7 sort of fizzled out.
Lots of unorganized circulation left in W-Cairbbean though. I suppose if it starts circulation, maybe moves NW into W-GOM region, could make something.



what i think will also be interesting is to see this residual effect coupled with the trough that is suppose to drop down and the sst's. also anyone see the latest mjo runs(just curious)?
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Quoting TXCWC:


If I am reading the models right today it looks like Euro and GFS have flipped as far as location of the main BOC low when it comes ashore...Euro now north of GFS with low coming ashore around the Tex/Mex border and GFS now where Euro was showing. I suspect GFS may trend further north again before all is said and done - Euro also seems slower than GFS as well. In short - alot of details still not known with this future BOC low and just where the heavier rains will end up.


From HPC


WITH THE EXCEPTION OF ADDING A SPOT LOW APPROACHING
BROWNSVILLE...TEXAS...DAYS 6 AND 7...AS PER COORDINATION WITH THE
NATIONAL HURRICANE CENTER...MADE ONLY COSMETIC CHANGES TO THE
UPDATE PACKAGE FOR THE FINAL ISSUANCE. THE LOW ALONG THE GULF
COAST OF MEXICO IS INTENDED TO REFLECT THE POSSIBILITY OF TROPICAL
DEVELOPMENT...BUT IN THE MOST PRACTICAL SENSE...ADDS SUPPORT FOR
INCREASING THE PROBABILITY OF PRECIPITATION OVER THE REGION IN THE
MOIST FLOW NEAR THE SOUTHERN EDGE OF THE WESTERLIES

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Quoting TXCWC:


If I am reading the models right today it looks like Euro and GFS have flipped as far as location of the main BOC low when it comes ashore...Euro now north of GFS with low coming ashore around the Tex/Mex border and GFS now where Euro was showing. I suspect GFS may trend further north again before all is said and done - Euro also seems slower than GFS as well. In short - alot of details still not known with this future BOC low and just where the heavier rains will end up.

There is another feature on that too... what about the low in the Tropical Atlantic NE of the islands?
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Quoting Levi32:


The summer of 1951 had all three indices in the same phase as this year. 1963 is a very close analog as well except that the AMO was neutral to negative that year.


That's pretty interesting, considering when I wrote my blog about Ernesto, I based a lot my forecast track off an analog from 1951: Hurricane Charley. It turned out to be a very solid analog as Charlie went just north of Ernesto.

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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.

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