Alert archive / Arizona / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 30, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 19, 2009, 4:55 PM MST for Pima 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 outline as issued.
The facts
- Issued
- Jul 19, 2009, 4:55 PM MST (23:55 UTC)
- Expired
- Jul 19, 2009, 6:00 PM MST
- In force
- 65 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 48 km from the middle of the area, began a volume at 23:56 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.9 hours before the alert went out and 12 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
- 61 J/kg
- Mixed-layer CIN
- -512 J/kg
- Mixed-layer LCL
- 3180 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS55 KTWC 192355
SVRTWC
AZC019-200100-
/O.NEW.KTWC.SV.W.0030.090719T2355Z-090720T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
455 PM MST SUN JUL 19 2009
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
THIS INCLUDES THE CITIES OF...TUCSON...SEVEN FALLS...
* UNTIL 600 PM MST
* AT 451 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE
WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 13 MILES NORTH OF THREE POINTS TO 7 MILES WEST OF
TUCSON TO 5 MILES SOUTH OF CATALINA FOOTHILLS...OR ALONG A LINE
EXTENDING FROM 12 MILES SOUTH OF MARANA TO 7 MILES WEST OF
TUCSON. THESE STORMS WERE MOVING NORTHWEST AT 5 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SAGUARO NATIONAL PARK EAST...SAGUARO NATIONAL PARK WEST...SABINO
CANYON AND CATALINA FOOTHILLS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...FREQUENT
LIGHTNING...AND HEAVY RAIN WITH THIS STORM.
&&
LAT...LON 3234 11136 3236 11069 3203 11068 3192 11076
3199 11132
TIME...MOT...LOC 2353Z 231DEG 2KT 3224 11121 3225 11106
3218 11076
$$
CS3 follow-up statements
000
WWUS55 KTWC 200008
SVSTWC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
508 PM MST SUN JUL 19 2009
AZC019-200100-
/O.CON.KTWC.SV.W.0030.000000T0000Z-090720T0100Z/
PIMA AZ-
508 PM MST SUN JUL 19 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR EAST CENTRAL PIMA COUNTY...
AT 503 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM SAGUARO NATIONAL PARK WEST TO TUCSON
INTERNATIONAL AIRPORT TO DAVIS-MONTHAN AIR FORCE BASE...OR ALONG A
LINE EXTENDING FROM 14 MILES SOUTH OF MARANA TO 7 MILES SOUTH OF
TUCSON TO 6 MILES SOUTHEAST OF TUCSON. THESE STORMS WERE MOVING
NORTHWEST AT 5 MPH. THESE STORMS WILL MOVE OVER THE TUCSON METRO
AREA OVER THE NEXT HOUR...EXPECT STRONG AND DAMAGING WINDS WITH
THESE STORMS. A DUST STORM WITH VISIBILITIES NEAR ZERO WILL ALSO
OCCUR WITH THE STORMS.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
TUCSON...SEVEN FALLS...SAGUARO NATIONAL PARK EAST...SABINO CANYON AND
CATALINA FOOTHILLS
LAT...LON 3234 11136 3236 11069 3203 11068 3192 11076
3199 11132
TIME...MOT...LOC 0004Z 231DEG 2KT 3222 11125 3213 11096
3219 11084
$$
SHOEMAKER000
WWUS55 KTWC 200035
SVSTWC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
535 PM MST SUN JUL 19 2009
AZC019-200100-
/O.CON.KTWC.SV.W.0030.000000T0000Z-090720T0100Z/
PIMA AZ-
535 PM MST SUN JUL 19 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR EAST CENTRAL PIMA COUNTY...
AT 533 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM RYAN FIELD TO TUCSON TO CATALINA
FOOTHILLS...OR ALONG A LINE EXTENDING FROM 15 MILES SOUTHWEST OF
TUCSON TO TUCSON. THESE STORMS WERE MOVING NORTHWEST AT 5 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VAIL...
TUCSON INTERNATIONAL AIRPORT...SOUTH TUCSON...SEVEN FALLS...
SAHUARITA...SAGUARO NATIONAL PARK EAST...SABINO CANYON...RITA
RANCH...DAVIS-MONTHAN AIR FORCE BASE AND CORONA DE TUCSON
LAT...LON 3234 11136 3236 11069 3203 11068 3192 11076
3199 11132
TIME...MOT...LOC 0034Z 231DEG 2KT 3207 11112 3223 11096
3230 11092
$$
CS000
WWUS55 KTWC 200055
SVSTWC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
555 PM MST SUN JUL 19 2009
AZC019-200103-
/O.EXP.KTWC.SV.W.0030.000000T0000Z-090720T0100Z/
PIMA AZ-
555 PM MST SUN JUL 19 2009
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 600 PM MST...
THE THUNDERSTORMS HAVE WEAKENED...ALTHOUGH WINDS WILL STILL GUST UP
TO 40 MPH THROUGH 7 PM.
LAT...LON 3234 11136 3236 11069 3203 11068 3192 11076
3199 11132
TIME...MOT...LOC 0053Z 231DEG 2KT 3208 11111 3224 11095
3231 11091
$$
CSWhat 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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 1:31 PM MST, 3 hours 24 minutes earlier.
Area forecast discussion, Jul 19, 1:31 PM MST, 3 hours 24 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 130 PM MST SUN JULY 19 2009 .SYNOPSIS...STRONG HIGH PRESSURE ALOFT WILL BRING HOT CONDITIONS TO SOUTHEAST ARIZONA THROUGH AT LEAST THE MIDDLE OF THE WEEK. MOISTURE WILL ALSO BE SUFFICIENT FOR THE DAILY CYCLE OF SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. && .DISCUSSION...KEMX WSR-88D DETECTED ISOLATED 35-55 DBZ CELLS NEAR THE CATALINA MOUNTAINS AS WELL AS FAR SRN PIMA COUNTY AND WRN SANTA CRUZ COUNTY AT 2025Z. OTHER CELLS WERE JUST NE OF HANNAGAN MEADOW. VISIBLE SATELLITE IMAGERY INDICATED CUMULOFORM CLOUDS DEVELOPING ACROSS THE HIGHER TERRAIN OF THE FORECAST AREA. HAVE OPTED TO MAINTAIN THE SCENARIO OF ISOLATED-SCATTERED SHOWERS AND TSTMS THE REST OF THIS AFTERNOON AND INTO THIS EVENING. THE CONCERN WITH ANY THUNDERSTORMS WILL BE THE POTENTIAL FOR LOCALIZED STRONG/GUSTY WINDS PARTICULARLY GIVEN THE FAIRLY DRY SURFACE ENVIRONMENT. FOR INSTANCE KTUS DEWPOINT WAS 45 F AT 2020Z. BULK OF ACTIVITY EXPECTED TO END AROUND MIDNIGHT OR SO. SYNOPTIC-SCALE PATTERN PROGGED TO EXHIBIT ONLY VERY MINOR CHANGES THIS WEEK AS HIGH PRESSURE ALOFT TO REMAIN CENTERED OVER THE SWRN CONUS. THUS MONSOON MOISTURE TO CONTINUE ACROSS THE AREA. BASED ON 19/12Z GFS/ECMWF SOLUTIONS...DIFFICULT TO DISCERN FEATURES WITHIN THE FLOW THAT WOULD SIGNIFY A MORE-PRONOUNCED CONVECTIVELY-ACTIVE DAY FROM ANOTHER. SO WILL CONTINUE TO DEPICT EITHER A SLIGHT CHANCE OR LOW-END CHANCE-CATEGORY POPS DURING THE AFTERNOON AND EVENING PERIODS. DAYTIME HIGH TEMPS DURING MUCH OF THIS FORECAST PERIOD TO BE ABOUT 5-10 DEGS ABOVE NORMAL. && .AVIATION...EXPECT ISOLATED TO SCATTERED TSRA/SHRA THE REST OF THIS AFTERNOON AND EVENING. THE STRONGEST TSRA WILL BE ACCOMPANIED WITH WIND GUSTS OF 40-45 KTS. OTHERWISE...SCATTERED TO BROKEN CUMULOFORM CLOUDS WITH BASES 11-13K FT AGL. TSRA/SHRA TO DECREASE IN COVERAGE AFTER 04Z AND ANY CONVECTIVE CLOUD DEBRIS TO DISSIPATE LATE TONIGHT. SURFACE WINDS SWLY/WLY 5-15 KTS THRU 06Z THEN SLY/SELY 5-15 KTS LATE TONIGHT AND INTO MONDAY MORNING. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR THIS WEEK...WITH THE BULK OF ACTIVITY DURING THE AFTERNOON AND EARLY NIGHTTIME HOURS. SURFACE WINDS GENERALLY FROM THE SOUTHWEST AND WEST THE REST OF THIS AFTERNOON AND THIS EVENING...THEN A DIURNALLY DRIVEN WIND REGIME ON TAP MONDAY INTO WEDNESDAY. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. BF WEATHER.GOV/TUCSON
Hazardous weather outlook, Jul 19, 9:30 AM MST, 7 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST SUN JUL 19 2009 AZZ019-030-034-035-201200- NORTHERN GREENLEE COUNTY-UPPER GILA RIVER VALLEY- SANTA CRUZ COUNTY-COCHISE COUNTY- 930 AM MST SUN JUL 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA INTO THIS EVENING. THE STRONGEST STORMS MAY PRODUCE BRIEF HEAVY RAIN AND WIND GUSTS UP TO 45 MPH. THE BULK OF THE ACTIVITY IS FORECAST TO END BY AROUND MIDNIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE DAILY CYCLE OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS IS EXPECTED MONDAY THROUGH SATURDAY...MAINLY DURING THE AFTERNOON AND EARLY NIGHTTIME HOURS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ029-031>033-201200- SOUTHEAST PINAL COUNTY-WESTERN PIMA COUNTY-TOHONO OODHAM NATION- TUCSON METRO/MARANA/GREEN VALLEY- 930 AM MST SUN JUL 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA AND SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA INTO THIS EVENING. THE STRONGEST STORMS MAY PRODUCE BRIEF HEAVY RAIN...WIND GUSTS UP TO 45 MPH...AND REDUCED VISIBILITIES DUE TO BLOWING DUST. THE BULK OF THE ACTIVITY IS FORECAST TO END BY AROUND MIDNIGHT. ALSO...NEAR RECORD HIGH TEMPERATURES ARE ON TAP THIS AFTERNOON FOR SOUTHEAST PINAL AND PIMA COUNTIES. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE DAILY CYCLE OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS IS EXPECTED MONDAY THROUGH SATURDAY...MAINLY DURING THE AFTERNOON AND EARLY NIGHTTIME HOURS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. WEATHER.GOV/TUCSON
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 4:28 PM MST | Severe Thunderstorm Warning | TWC | Pima | 47 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.