Alert archive / Arizona / Special Weather Statements in 2011

Special Weather Statement, NWS Tucson, AZ

August 17, 2011

NWS Tucson, AZ issued this special weather statement at Aug 17, 2011, 1:17 PM MST. It was in force for 43 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: Aug 17, 2011, 1:17 PM MST (20:17 UTC)
Expired: Aug 17, 2011, 2:00 PM MST
In force: 43 min
Issued by: NWS Tucson, AZ

The radar

The Tucson radar (KEMX), 128 km from the middle of the area, began a volume at 20:18 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

Tuscon, AZ (KTUS), launched 12:00Z, 8.3 hours before the alert went out and 164 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 901 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 17, 10:05 AM MST, 3 hours 12 minutes earlier.

Area forecast discussion, Aug 17, 10:05 AM MST, 3 hours 12 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Aug 17, 8:10 AM MST, 5 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
810 AM MST WED AUG 17 2011

AZZ503-504-506>515-180600-
UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-TUCSON METRO AREA-
SOUTHEAST PINAL COUNTY-UPPER SAN PEDRO RIVER VALLEY-
EASTERN COCHISE COUNTY BELOW 5000 FEET-UPPER GILA RIVER VALLEY-
WHITE MOUNTAINS OF GRAHAM AND GREENLEE COUNTIES-
GALIURO AND PINALENO MOUNTAINS-CHIRICAHUA MOUNTAINS-
DRAGOON AND MULE AND HUACHUCA AND SANTA RITA MOUNTAINS-
CATALINA AND RINCON MOUNTAINS-BABOQUIVARI MOUNTAINS-
810 AM MST WED AUG 17 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
ARIZONA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR THROUGH TONIGHT.
THE MAIN THREATS WILL BE LOCALLY HEAVY RAINFALL AND WIND GUSTS IN
EXCESS OF 50 MPH WITH THE STRONGEST THUNDERSTORMS. PLEASE NOTE
THAT EVEN MODERATE RAINFALL OVER THE RECENT BURN AREAS COULD
RESULT IN FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE WILL BE A CHANCE OF THUNDERSTORMS THURSDAY THROUGH TUESDAY.
THE MAIN THREATS WILL BE LOCALLY HEAVY RAIN AND GUSTY WINDS OVER
50 MPH. ALSO... EVEN MODERATE RAINFALL OVER THE RECENT BURN AREAS
COULD RESULT IN FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

AZZ501-502-505-180600-
WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION-
SOUTH CENTRAL PINAL COUNTY-
810 AM MST WED AUG 17 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
ARIZONA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. THE MAIN THREATS
WILL BE LOCALLY HEAVY RAINFALL AND WIND GUSTS OF 40 TO 50 MPH WITH
THE STRONGER THUNDERSTORMS. PLEASE NOTE THAT EVEN MODERATE
RAINFALL OVER THE RECENT BURN AREAS COULD RESULT IN FLASH
FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE WILL BE A SLIGHT CHANCE OF MAINLY AFTERNOON AND EVENING
THUNDERSTORMS THURSDAY THROUGH TUESDAY. THE MAIN THREATS WILL BE
LOCALLY HEAVY RAIN AND GUSTY WINDS IN EXCESS OF 50 MPH.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

WEATHER.GOV/TUCSON

In the hours before

Local storm report, Aug 17, 12:11 PM MST, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TUCSON AZ
1211 PM MST WED AUG 17 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     TSTM WND DMG     TUCSON                  32.24N 110.94W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            POWER POLES BLOWN DOWN ON INA ROAD BETWEEN THORNYDALE
            ROAD AND INTERSTATE 10.

0415 PM     TSTM WND DMG     2 S DOVE MOUNTAIN       32.43N 111.08W
08/16/2011                   PIMA               AZ   NWS EMPLOYEE

            PALO VERDE TREES DOWNED.

0420 PM     TSTM WND DMG     5 SE MARANA             32.36N 111.11W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            MESQUITE TREE DOWN AT SILVERBELL RD AND CONTINENTAL
            RESERVE LOOP WITH SEVERAL ADDITIONAL TREES DOWN IN
            CONTINENTAL RESERVE AREA.

0420 PM     HEAVY RAIN       1 SE DOVE MOUNTAIN      32.45N 111.07W
08/16/2011  M1.05 INCH       PIMA               AZ   PUBLIC

0420 PM     HEAVY RAIN       2 SE DOVE MOUNTAIN      32.44N 111.07W
08/16/2011  M1.52 INCH       PIMA               AZ   PUBLIC

0420 PM     HEAVY RAIN       7 SW ORO VALLEY         32.36N 111.06W
08/16/2011  M1.00 INCH       PIMA               AZ   PUBLIC

0420 PM     HEAVY RAIN       1 SE DOVE MOUNTAIN      32.45N 111.07W
08/16/2011  M1.05 INCH       PIMA               AZ   PUBLIC

0420 PM     HEAVY RAIN       6 SE MARANA             32.35N 111.09W
08/16/2011  M1.18 INCH       PIMA               AZ   PUBLIC

0420 PM     HEAVY RAIN       6 SE MARANA             32.35N 111.10W
08/16/2011  M1.65 INCH       PIMA               AZ   PUBLIC

0420 PM     TSTM WND DMG     6 SE MARANA             32.35N 111.10W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWNED PARTIALLY ON RESIDENCE.

0420 PM     TSTM WND DMG     7 ESE MARANA            32.36N 111.07W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            TREES DOWN IN THE SUNSET POINT NEIGHBORHOOD NEAR CORTARO
            FARMS RD AND STAR GRASS DR.

0420 PM     TSTM WND DMG     6 SE MARANA             32.36N 111.09W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            FRAMED BUILDING BEING CONSTRUCTED COLLAPSED.

0425 PM     TSTM WND DMG     6 ESE MARANA            32.37N 111.08W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE UPROOTED NEAR EAGLESTONE LOOP.

0425 PM     TSTM WND DMG     8 SW ORO VALLEY         32.35N 111.06W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            PALO VERDE TREE DOWNED ONTO PORCH.

0425 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.06W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            FENCE BLOWN DOWN ONTO CAR.

0425 PM     TSTM WND GST     7 S DOVE MOUNTAIN       32.37N 111.07W
08/16/2011  E58.00 MPH       PIMA               AZ   TRAINED SPOTTER

            SPOTTER WAS AT CORTARO AND INTERSTATE 10.

0425 PM     TSTM WND DMG     7 SW ORO VALLEY         32.34N 111.05W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWN BLOCKING PART OF ONE LANE OF THORNYDALE
            RD.

0430 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.04W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            SEVERAL TREES DOWN IN BUSINESS PARKING LOT WITH ONE TREE
            FALLING ON A PARKED CAR.

0430 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.06W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWNED ON RESIDENCE NEAR INA RD AND OLDFATHER
            RD.

0430 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.05W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            MESQUITE TREE SNAPPED IN HALF IN BUSINESS PARKING LOT
            WITH BRANCHES FALLING ON TRUCK.

0430 PM     TSTM WND DMG     7 SW ORO VALLEY         32.35N 111.04W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWNED AT BUTTERFIELD ELEMENTARY SCHOOL.

0430 PM     TSTM WND DMG     7 SW ORO VALLEY         32.34N 111.04W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWN ON MEREDITH BLVD

0430 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.06W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            LARGE TREE DOWN BLOCKING JUPITER ST.

0430 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.05W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            18 POWER POLES DOWN ALONG INA ROAD BETWEEN INTERSTATE 10
            AND SHANNON ROAD. SEVERAL POLES BLOCKED INA ROAD WITH ONE
            POLE ON A TRUCK. ADDITIONAL POLES FELL ONTO BUSINESSES
            AND SIGNS.

0435 PM     TSTM WND DMG     8 SW ORO VALLEY         32.33N 111.05W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            SEVERAL TREES DOWN NEAR THORNYDALE RD AND COSTCO DR.

0450 PM     FLASH FLOOD      TUCSON                  32.24N 110.94W
08/16/2011                   PIMA               AZ   BROADCAST MEDIA

            WATER FLOWING ACROSS HARTMANN ROAD NORTH OF CORTARO ROAD.

&&

MINNICK

Special weather statement, Aug 17, 1:17 PM MST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
117 PM MST WED AUG 17 2011

AZZ508-512-172100-
CHIRICAHUA MOUNTAINS INCLUDING CHIRICAHUA NATIONAL MONUMENT
AZ-EASTERN COCHISE COUNTY BELOW 5000 FEET INCLUDING DOUGLAS/WILLCOX
AZ-
117 PM MST WED AUG 17 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COCHISE COUNTY UNTIL
200 PM MST...

AT 112 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 18 MILES EAST OF DOUGLAS...MOVING NORTHWEST AT 5
TO 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN WHICH MAY LEAD TO
RUNOFF ACROSS LOW WATER CROSSINGS.

AREAS AFFECTED BY THIS STORM INCLUDE MAINLY RURAL AREAS ALONG AND
SOUTHEAST OF ROUTE 80...BUT IF THIS STORM HOLDS TOGETHER...GUSTY
OUTFLOWS COULD REACH THE DOUGLAS AREA.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3133 10968 3162 10948 3162 10905 3133 10905
TIME...MOT...LOC 2015Z 116DEG 6KT 3140 10925

KD

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 12:22 PM MST	Areal Flood Advisory	TWC	Cochise	83 min
Aug 17, 2:29 PM MST	Flash Flood Warning	TWC	Cochise	91 min
Aug 17, 2:44 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	31 min
Aug 17, 3:25 PM MST	Areal Flood Advisory	TWC	Pinal	80 min
Aug 17, 3:44 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 17, 3:53 PM MST	Severe Thunderstorm Warning	TWC	Cochise	37 min
Aug 17, 4:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min
Aug 17, 4:30 PM MST	Flash Flood Warning	TWC	Cochise	90 min
Aug 17, 4:57 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min

Nearby

Special Weather Statements in Arizona, 2011 Every special weather statement in 2011

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.