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My area is about to get blasted it appears. Very heavy rains incoming from thunderstorms lined up near the coast. We also had some rain earlier this afternoon.

Edit: I got ~~1.25”

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On 7/5/2024 at 6:05 PM, cbmclean said:

I don't question the extreme nature of today's heat, but I have lost confidence in RDUs measurement integrity.  Similar numbers observed in the area?

ETA: Just saw that RDU recorded 106 today while KFAY was at 101.  I call shenanigans.

ETA2: Just saw this on the NWS facebook page for RDU:

BREAKING: All-time record high/daily record high set at Raleigh & the daily record high set at Fayetteville.
The high at Raleigh was 106 degrees which breaks the all-time record high of 105 degrees and also sets a new daily high record. The high at Fayetteville was 101°F which ties the old record high.
A technician was on-site at the RDU ASOS platform at the time of the record and corroborated the accuracy of the sensor temperature with a handheld calibration device. In addition, the contract weather observer checked the temperature during the afternoon and using two other different devices they noted similar readings at around the time the record was set.

 

On 7/7/2024 at 1:21 PM, Silver Meteor said:

Friday's 106F at RDU does seem a bit much. From what's been posted here sensor location would be a plausible explanation. Here in Greenville (population ~100K) off to your east we too have been in a prolonged dry spell (grass is brown) so we have similar antecedent conditions yet we barely made it to 100F. On Saturday we topped at 99F. Don't know about RDU but Greenville's average July high is 91.4F.

 

Greenville temps.png

Here’s something NOT different as of 3PM: RDU’s 94 is the warmest in the entire state. What a shocker:

NORTH CAROLINA WEATHER ROUNDUP  
NATIONAL WEATHER SERVICE RALEIGH NC  
300 PM EDT MON JUL 08 2024  

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO  
SIGNIFICANT WEATHER AND/OR S TO VISIBILITY.  

NCZ001-053-055-056-065-067-082000-  
WESTERN NORTH CAROLINA  

CITY SKY/WX TMP DP RH WIND PRES REMARKS  
ASHEVILLE MOSUNNY 87 71 58 S9 30.11F  
JEFFERSON PTSUNNY 79 68 69 CALM 30.19F  
MORGANTON MOSUNNY 89 74 60 CALM 30.08F HX 97  
HICKORY NOT AVBL  
WILKESBORO MOSUNNY 88 68 51 CALM 30.11F  
RUTHERFORDTON PTSUNNY 86 72 62 CALM 30.08F  
MOUNT AIRY NOT AVBL  
BOONE MOSUNNY 82 70 67 SE7 30.01F  


NCZ021-022-025-041-071-084-088-082000-  
CENTRAL NORTH CAROLINA  

CITY SKY/WX TMP DP RH WIND PRES REMARKS  
CHARLOTTE PTSUNNY 87 71 58 VRB3 30.04F  
GREENSBORO PTSUNNY 89 73 59 VRB3 30.04F HX 97  
WINSTON-SALEM MOSUNNY 90 72 55 VRB3 30.06F HX 97  
RALEIGH-DURHAM PTSUNNY 94 N/A N/A NW3 30.04F  
FORT LIBERTY MOSUNNY 93 72 49 E7 30.00F HX 100  
FAYETTEVILLE MOSUNNY 92 72 51 SE3 30.01F HX 99  
BURLINGTON MOSUNNY 88 72 58 CALM 30.03F  
ROXBORO MOSUNNY 86 72 62 SW6 30.06F  
HENDERSON NOT AVBL  
LOUISBURG MOSUNNY 90 73 58 S6 30.05F HX 98  
LAURINBURG CLOUDY 85 72 65 S12 30.03F  


NCZ011-015-027-028-043-044-047-080-103-082000-  
NORTHEASTERN NORTH CAROLINA  

CITY SKY/WX TMP DP RH WIND PRES REMARKS  
ROCKY MT-WILSO MOSUNNY 93 65 39 SW8 30.02F HX 95  
GREENVILLE PTSUNNY 91 73 55 SW5 30.01F HX 100  
ELIZABETH CITY PTSUNNY 88 75 65 E7 30.02F HX 97  
MANTEO MOSUNNY 89 73 60 N9 30.04F HX 97  
CAPE HATTERAS MOSUNNY 88 79 74 SW7 30.04F HX 103  


NCZ078-087-090-091-093-098-101-082000-  
SOUTHEASTERN NORTH CAROLINA  

CITY SKY/WX TMP DP RH WIND PRES REMARKS  
LUMBERTON MOSUNNY 93 72 50 W15 30.01F HX 101  
GOLDSBORO PTSUNNY 92 69 46 W3 29.99F HX 97 
KINSTON MOSUNNY 90 75 62 SW7 30.03F HX 100  
KENANSVILLE PTSUNNY 88 77 70 CALM 30.03F HX 100  
NEW BERN PTSUNNY 85 76 74 N5 30.04F  
CHERRY POINT PTSUNNY 88 75 65 SW10G20 30.04F HX 97  
BEAUFORT MOSUNNY 88 76 67 SW14 30.04F HX 99  
JACKSONVILLE PTSUNNY 90 75 61 SW9 30.02F HX 100  
WILMINGTON PTSUNNY 87 76 69 CALM 30.03F HX 97

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RDU at 97 was hottest major station in the state Monday by 2F:

MAX/MIN TEMPERATURE AND PRECIPITATION TABLE FOR NC  
NATIONAL WEATHER SERVICE RALEIGH, NC  
815 PM EDT MON JUL 8 2024  

.BR RDU 0708 ES DH19/TAIRZS/TAIRZI/PPDRZZ  
:  
: HIGH PAST 18 HOURS / LOW PAST 24 HOURS /PCPN LAST 24 HOURS  
:  
: MAX MIN 24-HR  
:ID LOCATION TEMP TEMP PCPN  
:  
AVL :ASHEVILLE : 88 / 70 / 0.01  
BUY :BURLINGTON : 91 / 72 / T  
CLT :CHARLOTTE : 92 / 75 / 0.51  
ECG :ELIZABETH CITY : 90 / 74 / 0.00  
EWN :NEW BERN : 91 / 74 / 0.99  
FAY :FAYETTEVILLE : 94 / 75 / 0.00  
GSO :GREENSBORO : 91 / 73 / T  
HSE :CAPE HATTERAS : 89 / 78 / 0.00  
ILM :WILMINGTON : 91 / 76 / 0.07  
INT :WINSTON-SALEM : 92 / 75 / T  
LBT :LUMBERTON : 95 / 75 / 0.00  
MEB :LAURINBURG-MAXTON : 91 / 75 / 0.00  
MRH :BEAUFORT : 88 / 81 / 0.00  
RDU :RALEIGH-DURHAM : 97 / 75 / 0.00  
RWI :ROCKY MT-WILSON : 95 / 74 / 0.00

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5 hours ago, GaWx said:

RDU at 97 was hottest major station in the state Monday by 2F:

MAX/MIN TEMPERATURE AND PRECIPITATION TABLE FOR NC  
NATIONAL WEATHER SERVICE RALEIGH, NC  
815 PM EDT MON JUL 8 2024  

.BR RDU 0708 ES DH19/TAIRZS/TAIRZI/PPDRZZ  
:  
: HIGH PAST 18 HOURS / LOW PAST 24 HOURS /PCPN LAST 24 HOURS  
:  
: MAX MIN 24-HR  
:ID LOCATION TEMP TEMP PCPN  
:  
AVL :ASHEVILLE : 88 / 70 / 0.01  
BUY :BURLINGTON : 91 / 72 / T  
CLT :CHARLOTTE : 92 / 75 / 0.51  
ECG :ELIZABETH CITY : 90 / 74 / 0.00  
EWN :NEW BERN : 91 / 74 / 0.99  
FAY :FAYETTEVILLE : 94 / 75 / 0.00  
GSO :GREENSBORO : 91 / 73 / T  
HSE :CAPE HATTERAS : 89 / 78 / 0.00  
ILM :WILMINGTON : 91 / 76 / 0.07  
INT :WINSTON-SALEM : 92 / 75 / T  
LBT :LUMBERTON : 95 / 75 / 0.00  
MEB :LAURINBURG-MAXTON : 91 / 75 / 0.00  
MRH :BEAUFORT : 88 / 81 / 0.00  
RDU :RALEIGH-DURHAM : 97 / 75 / 0.00  
RWI :ROCKY MT-WILSON : 95 / 74 / 0.00

We didn’t make it quite to 95 here. High of 94.7

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14 hours ago, GaWx said:

RDU at 97 was hottest major station in the state Monday by 2F:

MAX/MIN TEMPERATURE AND PRECIPITATION TABLE FOR NC  
NATIONAL WEATHER SERVICE RALEIGH, NC  
815 PM EDT MON JUL 8 2024  

.BR RDU 0708 ES DH19/TAIRZS/TAIRZI/PPDRZZ  
:  
: HIGH PAST 18 HOURS / LOW PAST 24 HOURS /PCPN LAST 24 HOURS  
:  
: MAX MIN 24-HR  
:ID LOCATION TEMP TEMP PCPN  
:  
AVL :ASHEVILLE : 88 / 70 / 0.01  
BUY :BURLINGTON : 91 / 72 / T  
CLT :CHARLOTTE : 92 / 75 / 0.51  
ECG :ELIZABETH CITY : 90 / 74 / 0.00  
EWN :NEW BERN : 91 / 74 / 0.99  
FAY :FAYETTEVILLE : 94 / 75 / 0.00  
GSO :GREENSBORO : 91 / 73 / T  
HSE :CAPE HATTERAS : 89 / 78 / 0.00  
ILM :WILMINGTON : 91 / 76 / 0.07  
INT :WINSTON-SALEM : 92 / 75 / T  
LBT :LUMBERTON : 95 / 75 / 0.00  
MEB :LAURINBURG-MAXTON : 91 / 75 / 0.00  
MRH :BEAUFORT : 88 / 81 / 0.00  
RDU :RALEIGH-DURHAM : 97 / 75 / 0.00  
RWI :ROCKY MT-WILSON : 95 / 74 / 0.00

It was 98 yesterday at the Southeast Regional Climate Center in a shady, tree-filled, low-density part of Chapel Hill, but carry on kvetching about the RDU temperatures. Pretty sure the SERCC knows how to reliably measure temperature.

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2 hours ago, TheClimateChanger said:

It was 98 yesterday at the Southeast Regional Climate Center in a shady, tree-filled, low-density part of Chapel Hill, but carry on kvetching about the RDU temperatures. Pretty sure the SERCC knows how to reliably measure temperature.

 I didn’t bring this up on my own. I earlier saw others (here and elsewhere) mentioning this, including a pro-met. This tweet from Brad Panovich says there’s a warm bias though much more during daytime than night:

https://x.com/wxbrad/status/1809595420802261228?ref_src=twsrc^google|twcamp^serp|twgr^tweet


 The problem appears to not be with the sensor for that would mean just as much too hot at night, too, along with when it is cloudy, windy, etc. Rather, it appears per Brad to be due to the surroundings:

“This is not an ideal siting situation for KRDU. Maybe I'm wrong, but that's way too much gravel and concrete and a building too close to the ASOS. Compare KRDU versus KCLT ASOS, which is surrounded by vegetation and no buildings”

 From here:

https://x.com/wxbrad/status/1809626846633320508?ref_src=twsrc^tfw|twcamp^tweetembed|twterm^1809626846633320508|twgr^|twcon^s1_&ref_url=

 So, it appears Brad has made a case that should perhaps be considered. I don’t think this is intentional (conspiracy). Why would it be? But that doesn’t mean there isn’t an issue to consider that perhaps needs to be resolved.

 Being in GA, I would appreciate any objective fact based evidence one way or the other from the RDU area crowd. TIA!

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Going back to my comment about runway construction at RDU, here's a sat photo from 06/08. Compared to the Google Maps satellite photo, there is some significant tree/forest removal going on in the area. The station is circled in red:

For what it's worth I recorded 101.9 for a high on 07/05.

Screenshot 2024-07-09 164328.jpg

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Im consistently 2 degrees below what KRDU measures in daylight but very frequently close at nighttime. I’m almost exactly 9 miles from the airport. IMO it has a warm bias it didn’t used to have. Setting the all time record high when most areas were hot but not even close is suspicious. I maxed out at 102.1 that day, well off the 106 they recorded but much more aligned with other observations 

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22 hours ago, TheClimateChanger said:

It was 98 yesterday at the Southeast Regional Climate Center in a shady, tree-filled, low-density part of Chapel Hill, but carry on kvetching about the RDU temperatures. Pretty sure the SERCC knows how to reliably measure temperature.

I understand your point, the thing is, I suspect that many of us are on here because of an abiding interest in weather statistics, so when we see an anomaly we are interested.  Like many of us here, I have lived in NC all of my life, growing up near Fayetteville.  KFAY had traditionally been warmer than KRDU.  Now though, KRDU regularly outdoes KFAY, especially on hot days.  Last Friday on the day when I made my comments, KRDU beat KFAY by 5 degrees.  So yeah, I admit I am skeptical.  

It's actually a fascinating issue because UHI affects traditionally have a larger impact in elevating night temperatures compared to day temps, so why the "RDU bonus" seems larger during the day is surprising.

By the way, I lurk in the Mid-Atlantic forum a lot and they regularly had discussion about how unrepresentative the snow totals are from the DC airports because of microclimate.  This past winter in their discussions someone made the point that the main purpose of airport weather observations is to give the pilots and airport officials weather data pertinent to their operations.  They are NOT motivated by a love of meteorological statistics.

Lastly, the "RDU bonus" is something I can remember being noticed for some time now.  I can remember Greg Fishel making a snide remark about it while he was still at WRAL.  But it does seem to have become more obvious in recent years anecdotally.  

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58 minutes ago, cbmclean said:

 

I understand your point, the thing is, I suspect that many of us are on here because of an abiding interest in weather statistics, so when we see an anomaly we are interested.  Like many of us here, I have lived in NC all of my life, growing up near Fayetteville.  KFAY had traditionally been warmer than KRDU.  Now though, KRDU regularly outdoes KFAY, especially on hot days.  Last Friday on the day when I made my comments, KRDU beat KFAY by 5 degrees.  So yeah, I admit I am skeptical.  

It's actually a fascinating issue because UHI affects traditionally have a larger impact in elevating night temperatures compared to day temps, so why the "RDU bonus" seems larger during the day is surprising.

By the way, I lurk in the Mid-Atlantic forum a lot and they regularly had discussion about how unrepresentative the snow totals are from the DC airports because of microclimate.  This past winter in their discussions someone made the point that the main purpose of airport weather observations is to give the pilots and airport officials weather data pertinent to their operations.  They are NOT motivated by a love of meteorological statistics.

Lastly, the "RDU bonus" is something I can remember being noticed for some time now.  I can remember Greg Fishel making a snide remark about it while he was still at WRAL.  But it does seem to have become more obvious in recent years anecdotally.  

 Good point. Regarding the bolded I don't know if this is related to a classic UHI effect. The hotter sunny summer afternoons are possibly due to surrounding gravel/concrete/building per Brad P. and/or the construction of a new runway per marsman's posts. Would these be classic UHI? I also wonder if the recent flash drought was affecting RDU more than FAY and other areas since drought, alone, typically results in hotter summer afternoons due to drier ground but not warmer lows.

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1 hour ago, NorthHillsWx said:

Regardless of exact daily records or just how hot Rdu is compared to other places, this has got to be a record hot summer. I cannot remember a summer with this many 100 and upper 90 degree days this early in the summer

You know it’s bad when TV Mets are billing relief as temps falling to the low 90s

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6 hours ago, NorthHillsWx said:

Regardless of exact daily records or just how hot Rdu is compared to other places, this has got to be a record hot summer. I cannot remember a summer with this many 100 and upper 90 degree days this early in the summer

It is awful but not sure if it will beat 2007. I hope not. There was this tonight though:
GSLG7t7asAE5KaA?format=jpg&name=4096x409

GSLG7t1a4AAyQdu?format=jpg&name=4096x409

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6 hours ago, eyewall said:

It is awful but not sure if it will beat 2007. I hope not. There was this tonight though:

It’s brutal. Waking up and not seeing a heat advisory or warning today felt strange, haven’t seen many days recently without heat headlines 

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This weekend's disturbance may already be causing problems east of Raleigh. The line that came through RDU last night stalled to the east, Flood Warnings up from Greenville south to Kinston, no strangers to flooding there. 
 

Quote
Flash Flood Warning
National Weather Service Newport/Morehead City NC
852 AM EDT Thu Jul 11 2024

The National Weather Service in Newport/Morehead City has issued a

* Flash Flood Warning for...
  East Central Duplin County in eastern North Carolina...
  West Central Jones County in eastern North Carolina...
  Southwestern Lenoir County in eastern North Carolina...
  Northwestern Onslow County in eastern North Carolina...

* Until 1145 AM EDT.

* At 852 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 2 and 4.5 inches of
  rain have fallen. Additional rainfall amounts of 1.5 to 3 inches
  are possible in the warned area. Flash flooding is ongoing or
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Beulaville, Potters Hill, Sarecta, Pink Hill, Lyman and Hargetts
  Crossroads.

 

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17 hours ago, NorthHillsWx said:

Regardless of exact daily records or just how hot Rdu is compared to other places, this has got to be a record hot summer. I cannot remember a summer with this many 100 and upper 90 degree days this early in the summer

Indeed: check out both the E US and the SW US on this map: over 75 locations in US with hottest summer 6/1 through present with probably about that many second hottest:

 

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