It Identifying the End of Texas Drought John W NielsenGammon Texas State Climatologist D Brent McRoberts Department of Atmospheric Sciences HighResolution Drought Monitor Daily Stage 4 Precipitation Analysis NWSs River Forecast Centers ID: 292874
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It’s a Flood, Dam
It!Identifying the End of Texas Drought
John W. Nielsen-Gammon
Texas State Climatologist
D. Brent
McRoberts
Department of Atmospheric SciencesSlide2Slide3
High-Resolution Drought Monitor
Daily Stage 4 Precipitation Analysis (NWS’s River Forecast Centers)Historical COOP observationsPRISM climate normalsImproved drought metricsSlide4
High-Resolution Drought Monitor
Phase 1: Texas PrototypePhase 2: National Application (USDA)Phase 3: From Experimental to Operational (NOAA)Slide5
Texas Drought, 2010-2015
Phase 2 informationSPI Blend: SPI calculated from a range of accumulation intervals instead of a single accumulation intervalMinimum SPI blend: Lowest SPI value from blends ranging from 2 months to 2 yearsShows “worst” of short- & long-term conditionsSlide6Slide7Slide8Slide9Slide10Slide11Slide12Slide13Slide14Slide15Slide16Slide17Slide18Slide19Slide20Slide21Slide22Slide23Slide24Slide25Slide26Slide27Slide28Slide29Slide30Slide31Slide32Slide33Slide34Slide35Slide36Slide37Slide38Slide39Slide40Slide41Slide42Slide43Slide44Slide45Slide46Slide47Slide48Slide49Slide50Slide51Slide52Slide53Slide54Slide55Slide56Slide57Slide58Slide59Slide60Slide61Slide62Slide63Slide64Slide65Slide66Slide67Slide68Slide69Slide70Slide71Slide72Slide73Slide74Slide75Slide76Slide77Slide78Slide79Slide80Slide81Slide82Slide83Slide84Slide85Slide86Slide87Slide88Slide89Slide90Slide91Slide92Slide93Slide94Slide95Slide96Slide97Slide98Slide99Slide100Slide101Slide102Slide103Slide104Slide105Slide106Slide107Slide108Slide109Slide110Slide111Slide112Slide113Slide114Slide115Slide116Slide117Slide118Slide119Slide120Slide121Slide122Slide123Slide124Slide125Slide126Slide127Slide128Slide129Slide130Slide131Slide132Slide133Slide134Slide135Slide136Slide137Slide138Slide139Slide140Slide141Slide142Slide143Slide144Slide145Slide146Slide147Slide148Slide149Slide150Slide151Slide152Slide153Slide154Slide155Slide156Slide157Slide158Slide159Slide160Slide161Slide162Slide163Slide164Slide165Slide166Slide167Slide168Slide169Slide170Slide171Slide172Slide173Slide174Slide175Slide176Slide177Slide178Slide179Slide180Slide181Slide182Slide183Slide184Slide185Slide186Slide187Slide188Slide189Slide190Slide191Slide192Slide193Slide194Slide195Slide196Slide197Slide198Slide199Slide200Slide201Slide202Slide203Slide204Slide205Slide206Slide207Slide208Slide209Slide210Slide211Slide212Slide213Slide214Slide215Slide216Slide217Slide218Slide219Slide220Slide221Slide222Slide223Slide224Slide225Slide226Slide227Slide228Slide229Slide230Slide231Slide232Slide233Slide234Slide235Slide236Slide237Slide238Slide239Slide240Slide241Slide242Slide243Slide244Slide245Slide246Slide247Slide248Slide249Slide250Slide251Slide252Slide253Slide254Slide255Slide256
Texas Water Storage
Current Value
Value when PDSI went positive
Start of DroughtSlide257
Lake ArrowheadSlide258
Palo Pinto ReservoirSlide259
Medina LakeSlide260Slide261
In Progress
Phase 3: Removing radar-caused errors and artifacts from Stage 4 precipBeam blockageRange-dependence
Overshooting
Melting level
Beam filling
Rainfall estimation biasesSlide262
Future
ValidationTesting as NLDAS-2 inputSlide263
Contact Information
n-g@tamu.edu979-862-2248http://climatexas.tamu.eduhttp://climatechangenationalforum.org