Alert archive / Arizona / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 24, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 19, 2009, 11:25 PM MST for Gila County, Maricopa County, Arizona. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2009, 11:25 PM MST (06:25 UTC)
- Expired
- Jul 20, 2009, 12:30 AM MST
- In force
- 65 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
Counties Gila County, AZ, Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 32 km from the middle of the area, began a volume at 06:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 6.4 hours before the alert went out and 34 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 57 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 3770 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 10:10 PM MST, 1 hour 15 minutes earlier.
Area forecast discussion, Jul 19, 10:10 PM MST, 1 hour 15 minutes before
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</html>Hazardous weather outlook, Jul 19, 3:38 PM MST, 7 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 338 PM MST SUN JUL 19 2009 AZZ021>023-026>028-202245- WEST CENTRAL DESERTS-NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA- SOUTHWEST DESERTS-SOUTHWEST MARICOPA COUNTY- NORTHWEST AND NORTH CENTRAL PINAL COUNTY- 338 PM MST SUN JUL 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH-CENTRAL ARIZONA...SOUTHWEST ARIZONA AND WEST-CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS THE WEST CENTRAL DESERTS THIS EVENING AND EARLY EVENING...MAINLY SOUTH AND EAST OF PHOENIX. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN...OCCASIONAL LIGHTNING...WIND GUSTS IN EXCESS OF 40 MPH AND BLOWING DUST. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT. IT WOULD BE WISE TO COMPLETE AS MUCH OUTDOOR ACTIVITY AS POSSIBLE IN THE EARLY MORNING WHEN THE SUN AND HEAT ARE LESS INTENSE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS. STORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING GUSTY SURFACE WINDS...BLOWING DUST...AND DEADLY LIGHTNING. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT THROUGH MONDAY EVENING. IT WOULD BE WISE TO COMPLETE AS MUCH OUTDOOR ACTIVITY AS POSSIBLE IN THE EARLY MORNING WHEN THE SUN AND HEAT ARE LESS INTENSE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ020-025-CAZ031>033-202245- LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY- LOWER COLORADO RIVER VALLEY CA-RIVERSIDE COUNTY/EASTERN DESERTS- IMPERIAL COUNTY- 338 PM MST SUN JUL 19 2009 /338 PM PDT SUN JUL 19 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWEST ARIZONA...EXTREME WEST-CENTRAL ARIZONA AND EXTREME SOUTHEAST CALIFORNIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TODAY ACROSS THE WEST CENTRAL DESERTS THIS EVENING AND EARLY EVENING...MAINLY SOUTH AND EAST OF PHOENIX. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN...OCCASIONAL LIGHTNING...WIND GUSTS IN EXCESS OF 40 MPH AND BLOWING DUST. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT. IT WOULD BE WISE TO COMPLETE AS MUCH OUTDOOR ACTIVITY AS POSSIBLE IN THE EARLY MORNING WHEN THE SUN AND HEAT ARE LESS INTENSE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS THROUGHOUT THE FORECAST PERIOD...THOUGH THE THREAT WILL DECREASE THROUGHOUT THE WEEK. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT THROUGH MONDAY EVENING. IT WOULD BE WISE TO COMPLETE AS MUCH OUTDOOR ACTIVITY AS POSSIBLE IN THE EARLY MORNING WHEN THE SUN AND HEAT ARE LESS INTENSE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. CAZ030-202245- JOSHUA TREE NATIONAL PARK- 338 PM PDT SUN JUL 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST CALIFORNIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. THE MORE INTENSE STORMS WILL BE CAPABLE OF PRODUCING GUSTY SURFACE WINDS...HEAVY RAINFALL AND DEADLY LIGHTNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS MONDAY AND MONDAY EVENING. THE MORE INTENSE STORMS WILL BE CAPABLE OF PRODUCING GUSTY SURFACE WINDS...HEAVY RAINFALL AND DEADLY LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ024-202245- SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- 338 PM MST SUN JUL 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. THE MORE INTENSE STORMS WILL BE CAPABLE OF PRODUCING GUSTY SURFACE WINDS...HEAVY RAINFALL AND DEADLY LIGHTNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A SLIGHT CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS MONDAY THROUGH SATURDAY. THE MORE INTENSE STORMS WILL BE CAPABLE OF PRODUCING GUSTY SURFACE WINDS...HEAVY RAINFALL AND DEADLY LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MCLANE NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX
In the hours before
Special weather statement, Jul 19, 6:51 PM MST, 4 hours 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
651 PM MST SUN JUL 19 2009
AZZ027-028-200245-
MARICOPA AZ-PINAL AZ-
651 PM MST SUN JUL 19 2009
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
WEST CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA
SOUTH CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
UNTIL 745 PM MST
STRONG THUNDERSTORMS IN SOUTHWEST MARICOPA COUNTY WILL PRODUCE
GUSTY WINDS AND BRIEF HEAVY RAINFALL. GUSTY OUTFLOW WINDS UP TO 40
MPH WILL SPREAD ACROSS THE DESERTS OF SOUTHWEST MARICOPA AND
NORTHWEST PINAL COUNTIES. AREAS OF BLOWING DUST ARE LIKELY TO BE
GENERATED BY THESE WINDS...WITH VISIBILITIES FALLING UNDER ONE MILE
AT TIMES.
MOTORISTS ALONG INTERSTATE 8 BETWEEN CASA GRANDE AND GILA
BEND...INTERSTATE 10 BETWEEN CASA GRANDE AND SUN LAKES...AND STATE
HIGHWAYS 85 AND 347...SHOULD BE ALERT FOR REDUCED VISIBILITIES AND
RAPIDLY CHANGING CONDITIONS.
LOCATIONS IMPACTED INCLUDE...
GILA BEND...
STANFIELD...
CASA GRANDE...
MOBILE...
FREEMAN...
MARICOPA...
LAT...LON 3325 11310 3317 11142 3289 11143 3272 11168
3272 11178 3278 11179 3276 11204 3272 11206
3272 11214 3267 11216 3267 11220 3251 11222
3250 11308
TIME...MOT...LOC 0144Z 212DEG 10KT 3298 11275 3252 11212
JRLocal storm report, Jul 19, 9:54 PM MST, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
954 PM MST SUN JUL 19 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0655 PM TSTM WND DMG 4 SW GILA BEND 32.91N 112.73W
07/19/2009 MARICOPA AZ LAW ENFORCEMENT
NUMEROUS POWER POLES DOWN ALONG HIGHWAY 85 BETWEEN GILA
BEND AND AJO. REPORT RELAYED BY WFO TUCSON.
0735 PM DUST STORM 2 W CASA GRANDE 32.89N 111.77W
07/19/2009 PINAL AZ TRAINED SPOTTER
VISIBILITY OF 20 FEET.
0750 PM DUST STORM 5 E SUN LAKES 33.21N 111.78W
07/19/2009 PINAL AZ TRAINED SPOTTER
ONE QUARTER MILE VISIBILITY.
0750 PM TSTM WND GST 3 NW MESA 33.44N 111.78W
07/19/2009 E45 MPH MARICOPA AZ TRAINED SPOTTER
HALF-INCH DIAMETER TREE BRANCHES DOWN IN STREET.
&&
JROGERSLocal storm report, Jul 19, 11:13 PM MST, 12 minutes before
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</html>The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 5:20 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 55 min |
| Jul 19, 6:06 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 54 min |
| Jul 19, 6:20 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 55 min |
| Jul 19, 6:51 PM MST | Special Weather Statement | PSR | 54 min | |
| Jul 19, 6:58 PM MST | Areal Flood Advisory | PSR | La Paz | 107 min |
| Jul 19, 7:09 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 66 min |
| Jul 19, 7:20 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 70 min |
| Jul 19, 7:35 PM MST | Dust Storm Warning | PSR | 85 min | |
| Jul 19, 7:39 PM MST | Areal Flood Advisory | PSR | Maricopa | 111 min |
| Jul 19, 8:04 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 56 min |
| Jul 19, 8:48 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 117 min |
| Jul 19, 10:03 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 57 min |
| Jul 19, 10:49 PM MST | Areal Flood Advisory | PSR | Maricopa | 116 min |
| Jul 20, 12:31 AM MST | Areal Flood Advisory | PSR | Gila, Maricopa | 119 min |
| Jul 20, 2:10 AM MST | Areal Flood Advisory | PSR | Gila, Maricopa | 3 hr |
| Jul 20, 4:48 PM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 42 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.